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Maredan Natural Clay as Raw Material for Zeolite Synthesis Akmaluddin Akmaluddin; Nurmasitoh Nurmasitoh; Muhdarina Muhdarina
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 1 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i1.15626

Abstract: The Maredan Riau clay contains alumina silica components, which can serve as raw material for zeolite synthesis. This research has been conducted on the effects of aging time and crystallization temperature during the zeolite synthesis process, which is the result of converting Maredan clay raw materials. The synthesis of zeolite follows a series of steps, including activation of natural clay using 1M H2SO4 and calcination at 650oC, curing of the post-calcination clay in 5 M NaOH, crystallization at different temperatures (80, 90, and 100ºC) for 8 hours, setting the final pH to up to 8 and drained. The solid obtained in zeolite was characterized to determine the ratio of Si/Al, type of zeolite and crystallinity, functional groups, and zeolite surface morphology. The analysis results with XRF at a crystallization temperature of 100°C showed that the Si/Al zeolite ratio was 1.75 which corresponds to the Si/Al ratio of sodalite-type zeolite. Accordingly, analysis with XRD also supports the formation of sodalite with a crystallinity of 51% and a crystal size of 30.03 nm. The FTIR and SEM characterization respectively showed the presence of D4R or D6R double ring external vibration of the sodalite at wave number 558.42 cm-1 and its morphology was round with petals which is a typical morphology of sodalite. It was concluded that the increase in crystallization temperature caused the crystallinity of the resulting sodalite to increase as well.Abstrak: Lempung Maredan Riau mengandung komponen alumina silika, yang dapat berperan sebagai bahan baku untuk sintesis zeolit. Penelitian ini bertujuan mengamati efek waktu aging dan suhu kristalisasi selama proses sintesis zeolit, yang merupakan hasil konversi bahan baku lempung Maredan. Sintesis zeolit mengikuti serangkaian tahap, di antaranya aktivasi lempung alam menggunakan 1M H2SO4 dan kalsinasi pada suhu 650oC, pemeraman lempung pasca kalsinasi di dalam 5 M NaOH, kristalisasi pada suhu yang berbeda (80, 90 dan 100ºC) selama 8 jam, pengaturan pH akhir hingga mencapai 8 dan dikeringkan. Padatan yang diperoleh berupa zeolit dikarakterisasi untuk menetapkan rasio Si/Al, jenis zeolit dan kristalinitas, gugus fungsi dan morfologi permukaan zeolit. Hasil analisis dengan XRF pada suhu kristalisasi 100oC menunjukkan bahwa rasio Si/Al zeolit adalah 1,75 yang sesuai dengan rasio Si/Al zeolit jenis sodalit. Sejalan dengan itu, analisis dengan XRD juga mendukung terbentuknya sodalit dengan kristalinitas 51% dan ukuran kristal 30,03 nm. Karakterisasi FTIR dan SEM masing-masing menunjukkan adanya vibrasi eksternal cincin ganda D4R atau D6R dari sodalit pada bilangan gelombang 558,42 cm-1 dan morfologinya berbentuk bulat berkelopak yang merupakan morfologi khas dari sodalit. Disimpulkan bahwa peningkatan suhu kristalisasi menyebabkan kristalinitas sodalit yang dihasilkan meningkat.

Generation and Characterization of Bio-Oil Obtained From The Slow Pyrolysis of Oil Palm Empty Fruit Bunches at Various Temperatures Siti Jamilatun; Dhias Cahya Hakika; Dwita Sarah; Anggun Puspitasari
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 1 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i1.17844

Abstract: In the last decade, biomass pyrolysis has received more attention in the renewable energy sector. This technology converts biomass to obtain valuable products: bio-oil, biochar, and gas. Bio-oil is a liquid product from pyrolysis that can be used to fuel boilers and furnaces, or further processed to produce fuel oil and chemical products. In this study, bio-oil was generated from slow pyrolysis of oil palm empty fruit bunches (OPEFB) at various temperatures. The objective of this research is to investigate the effect of temperature on the properties of products generated from the pyrolysis of OPEFB. Six different pyrolysis temperatures ranging from 300 to 700℃ were used to produce bio-oil. It was found that operating temperature affected the product yield and its properties significantly. The higher the operating temperature of slow pyrolysis, the amount of bio-oil produced was also increased with a decrease in biochar yield. The highest yield of bio-oil was found to be 55.53% at a pyrolysis temperature of 700℃ with a yield of biochar and syngas was 24.22% and 20.25%, respectively. The GC-MS analysis was used as a quantitative means to characterize the liquid pyrolysis product. The findings of GC-MS showed that bio-oil generated in this study was dominated by phenols and ketones. In conclusion, pyrolysis of OPEFB demonstrates significant potential for industrial applications to generate valuable products especially bio-oil, providing a renewable alternative to fossil fuels.Abstrak: Dalam satu dekade terakhir, pirolisis biomassa semakin mendapat perhatian di sektor energi terbarukan. Teknologi ini mengubah biomassa menjadi produk-produk yang bernilai seperti: bio-oil, biochar, dan gas. Bio-oil adalah produk cair dari pirolisis yang dapat digunakan sebagai bahan bakar boiler dan furnace, atau diproses lebih lanjut untuk menghasilkan bahan bakar minyak dan produk kimia. Dalam penelitian ini, bio-oil dihasilkan dari proses pirolisis lambat tandan kosong kelapa sawit (TKKS) pada berbagai kondisi suhu. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh suhu terhadap karakteristik produk yang dihasilkan dari pirolisis TKKS. Berbagai variasi suhu pirolisis dari rentang 300 hingga 700℃ digunakan untuk menghasilkan bio-oil. Hasil penelitian menunjukkan bahwa suhu pirolisis mempengaruhi yield produk dan karakteristiknya secara signifikan. Semakin tinggi suhu operasi pirolisis, jumlah bio-oil yang dihasilkan juga semakin meningkat, namun diikuti dengan penurunan yield biochar. Yield tertinggi bio-oil yaitu sebesar 55,53% diperoleh pada suhu 700℃ diikuti dengan yield biochar dan syngas masing-masing sebesar 24,22% and 20,25%. Analisis GC-MS digunakan sebagai metode kuantitatif untuk mengkarakterisasi produk cair dari pirolisis. Hasil GC-MS menunjukkan bahwa komposisi bio-oil yang dihasilkan dalam penelitian ini didominasi oleh senyawa fenol dan keton. Penelitian ini menjanjikan potensi dari pirolisis TKKS untuk aplikasi industri guna menghasilkan produk bernilai tinggi berupa bio-oil sebagai penyedia sumber energi terbarukan pengganti bahan bakar fosil.

Arabic Diacritic-Aware Text-Audio Segmentation and Alignment Model (DASAM) Adel Sabour; Abdeltawab Hendawi; Mohamed Ali
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 1 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i1.23637

Abstract: This paper introduces the Diacritic-Aware Segmentation and Alignment Model for Arabic (DASAM). Diacritics are vital for pronunciation and meaning in the Arabic language but are often ignored by current speech recognition systems. DASAM is designed for word-level segmentation and alignment in unseen audio and associating them with diacritic-marked Arabic text. The DASAM approach uses linguistic analysis based on intonation rules. DASAM then applies Dynamic Time Warping (DTW) to match the reference audio word with its position in the unseen sentence audio. The model outputs a list of words with their start and end times in the recording. Tested on the Qur’an dataset, DASAM outperforms Google Speech-to-Text (STT) in predicting word timings. It achieves higher accuracy in text-audio alignment, with values of 0.959 and 0.957 for word start and end times, respectively (compared to Google STT’s 0.870 and 0.849). Additionally, DASAM employs advanced signal processing techniques and demonstrates robustness across various audio variations. These results establish that DASAM constitutes a fundamental building block for speech-to-text conversion and linguistic research in Arabic, particularly for applications involving diacritics.

Analysis of Microplastics of Bilih Fish (Mystacoleucus padangensis) in Lake Singkarak, West Sumatra Using FT-IR Spectroscopy Ad'hani, Calysta Deli; Zulkarnaini, Zulkarnaini; Silvia, Shinta; Yuranda, Fitri
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 2 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i2.22336

Abstract: Microplastics have become a global concern due to their wide distribution and ecological effects. Understanding the interactions between microplastics and ecosystems is important for environmental risk assessment. This study analyzed the abundance and distribution of microplastics in Lake Singkarak. Substantial microplastic research is still lacking for freshwater biota, so a study was conducted to determine the level of microplastic pollution in bilih fish tissue. The fish's size, weight, and sampling point were studied about microplastic uptake through two channels, digestion and respiration. From the results, the types of polymers identified in this study were polyethylene, polyvinyl chloride, and polyethylene terephthalate. Overall, 7.14% - 23.53% (average = 11.48%) of microplastics were identified in the D tract of bilih fish from sixteen different sampling points. While 7.69% - 17.39% (average = 11.85%) of microplastics were identified in the respiration of bilih fish. The highest percentage of the abundance of microplastic forms in the digestions identified was fiber at 70.42% and 66.82% in the digestions. At the same time, The lowest percentage identified was fragmented, with an average abundance of 29.58% in digestion and 33.32% in respiration. In conclusion, this study reveals the presence and impact of microplastics in Lake Singkarak, West Sumatra, on the bilih fish (Mystacoleucus padangensis). By examining the fish's digestive and respiratory systems and using FT-IR Spectroscopy, the research highlights the ecological and economic implications of microplastic pollution. These findings emphasize the need for targeted conservation and management strategies.Abstrak: Mikroplastik telah menjadi perhatian global karena distribusinya yang luas dan efek ekologisnya. Pemahaman tentang interaksi antara mikroplastik dengan ekosistem dinilai penting untuk penilaian risiko lingkungannya. Penelitian ini menganalisis kelimpahan dan distribusi mikroplastik di Danau Singkarak. Penelitian mikroplastik secara substansial masih sedikit untuk biota air tawar maka dilakukan penelitian untuk menentukan tingkat polusi mikroplastik pada jaringan ikan bilih. Ukuran, berat, dan titik sampling ikan diteliti dalam kaitannya dengan jerapan mikroplastik melalui dua saluran, yaitu digestif (pencernaan) dan respirasi (pernapasan). Dari hasil penelitian, jenis polimer yang teridentifikasi dalam penelitian ini adalah jenis polietilen, polivinil klorida, dan polietilen tereftalat. Secara keseluruhan 7,14% - 23,53% (rata-rata = 11,48%) mikroplastik teridentifikasi pada digestif ikan bilih dari enam belas titik sampling yang berbeda. Sementara 7,69% - 17,39% (rata-rata = 11,85%) mikroplastik teridentifikasi pada respirasi ikan bilih. Persentase kelimpahan bentuk mikroplastik tertinggi pada digestif yang diidentifikasi adalah fiber sebesar 70,42% dan 66,82% pada digestif. Sementara persentase terendah yang diidentifikasi adalah fragment dengan rata-rata kelimpahan sebesar 29,58% di digestif dan 33,32% di respirasi. Sebagai kesimpulan, penelitian ini mengungkap keberadaan dan dampak mikroplastik di Danau Singkarak, Sumatera Barat, pada ikan bilih (Mystacoleucus padangensis). Dengan memeriksa sistem pencernaan dan pernapasan ikan serta menggunakan Spektroskopi FT-IR, studi ini menunjukkan implikasi ekologis dan ekonomi dari polusi mikroplastik. Temuan ini menekankan perlunya strategi konservasi dan pengelolaan yang terarah.

Analysis of The Effect of Aluminum Electrode Geometry on The Removal of Polyethylene Microbeads Using The Electrocoagulation Method in Greywater Ferdy Ashari Syawal; Zulkarnaini Zulkarnaini; Shinta Indah; Fadhila Fadhila
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 1 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i1.22307

Abstract: The increasing use of cosmetics and personal care products containing small-sized and low-density microbeads will disrupt the aquatic environment because they are difficult to remove in wastewater treatment plants (WWTPs). Electrocoagulation (EC) is an effective technology for removing microbeads from greywater. This research aims to develop an effective cylindrical electrode geometry design in the EC process to reduce electrode passivation, as evidenced by the removal of polyethylene (PE) microbeads from greywater, reduced energy consumption, and the analysis of the EC kinetics model. Experiments were carried out on batch and continuous systems using artificial greywater with an initial concentration of 0.5 g/L. Variations made in the batch system are the geometry of the cylindrical electrode without holes (ESTB), a cylindrical electrode with holes (ESB), a cylindrical electrode with anode with holes, and a cathode with no holes (ESB-A), a cylindrical electrode with cathode, with holes and anode with no holes (ESB-K), and plate electrode (EP). The variations carried out in the continuous system were flow rates of 60, 70, 80, and 90 mL/minute using the best electrode geometry design obtained from the batch system. The best removal efficiency of PE microbeads in a batch system was 98.44% in ESB-K geometry and saved 75% energy consumption compared to EP. The best removal efficiency of PE microbeads in a continuous system was 79.76% at a flow rate of 60 mL/minute. The kinetic model of the EC reaction which corresponds to the removal process of PE microbeads is a first-order reaction. Future research should focus on optimizing the design of continuous reactors so that they can be applied to tertiary processing in domestic WWTPs and industrial WWTPs.Abstrak: Meningkatnya penggunaan kosmetik dan produk perawatan pribadi (CPCP) yang mengandung microbeads berukuran kecil dan berkepadatan rendah akan mengganggu lingkungan perairan karena sulit disisihkan di instalasi pengolahan air limbah (IPAL). Elektrokoagulasi adalah teknologi yang efektif untuk menyisihkan microbeads dari greywater. Penelitian ini bertujuan untuk mengembangkan desain geometri elektroda silinder yang efektif pada proses elektrokoagulasi untuk mengurangi pasivasi elektroda yang dibuktikan dari penyisihan microbeads polyethylene dari greywater dan pengurangan konsumsi energi yang digunakan dan menganalisis model kinetika elektrokoagukasi. Eksperimen dilakukan pada sistem batch dan kontinu menggunakan greywater artifisial dengan konsentrasi awal 0,5 g/L. Variasi yang dilakukan pada sistem batch adalah geometri elektroda silinder tidak berlubang (ESTB), elektroda silinder berlubang (ESB), elektroda silinder anoda berlubang dan katoda tidak berlubang (ESB-A), elektroda silinder katoda berlubang dan anoda tidak berlubang (ESB-K), dan elektroda pelat (EP). Variasi yang dilakukan pada sistem kontinu adalah laju alir 60, 70, 80, dan 90 mL/menit menggunakan desain geometri elektroda terbaik yang diperoleh dari sistem batch. Efisiensi penyisihan microbeads polyethylene terbaik pada sistem batch sebesar 98,44% pada geometri ESB-K dan menghemat 75% konsumsi energi dibandingkan EP. Efisiensi penyisihan microbeads polyethylene terbaik pada sistem kontinu sebesar 79,76% pada laju alir 60 mL/menit. Model kinetika reaksi elektrokoagulasi yang sesuai dengan proses penyisihan microbeads polyethylene adalah reaksi orde satu. Penelitian selanjutnya harus berfokus pada optimalisasi desain reaktor kontinu, sehingga dapat diterapkan pada pengolahan tersier di IPAL domestik maupun IPAL industri.

Photodegradation of Liquid Waste Using ZnO/Graphene-Like Composites Desi Heltina; Raihan Daffansyah Sinaga; Yayan Setiawan; M Iwan Fermi; Amun Amri
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 1 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i1.21000

Abstract: The development of industries such as textiles, dyes, plastics, medicines, cosmetics, and others is increasing along with a rise in production, leading to a high amount of liquid waste generated. Non-biodegradable, toxic, and carcinogenic liquid waste can cause environmental pollution to surrounding water. To address this challenge, biomass waste such as palm kernel shells can be used to treat liquid waste by compositing it with photocatalyst materials. Therefore, this research aimed to obtain ZnO/graphene-like composites to degrade liquid waste. ZnO/Graphene-like composites were synthesized using the solvothermal method, followed by calcination. The performance test was carried out by varying the types of methylene blue, methyl orange, and phenol waste with an initial concentration of 10 ppm, alongside the variations of ultraviolet (UV) and mercury lamps. Subsequently, characterization was carried out using SEM, XRD, FTIR, BET, UV-Vis DRS, and UV-Vis Spectrophotometer. The results showed that the percent degradation of methylene blue under UV and mercury were 83.42% and 84.93 % respectively, while methyl orange in the same conditions was 94.83% and 97.17%, respectively. Furthermore, the percent degradation of phenol in UV light and mercury were 86.03% and 89.62%, respectively. This showed that the use of mercury lamps on methyl orange was more effective than UV lamps on methylene blue and phenol.Abstrak: Perkembangan industri seperti industri tekstil, pewarna, plastik, obat-obatan, kosmetik, dan lain-lain semakin meningkat dengan seiring bertambahnya jumlah produksi sehingga jumlah limbah yang dihasilkan juga meningkat salah satunya limbah cair. Limbah cair yang tidak dapat terurai secara biologis, beracun, dan karsinogenik ke perairan terdekat mengakibatkan pencemaran lingkungan. Disisi lain, limbah biomassa seperti cangkang sawit dapat dimanfaatkan untuk mengolah limbah cair, salah satunya mengkompositkan dengan material fotokatalis. Penelitian ini bertujuan memperoleh komposit ZnO/graphene-like untuk mendegradasi limbah cair. Komposit ZnO/Graphene-like disintesis dengan metode solvothermal dan dikalsinasi. Uji kinerja komposit ZnO/graphene-like dilakukan dengan menvariasikan jenis limbah methylene blue, methyl orange dan fenol dengan konsentrasi awal masin-masing 10 ppm serta dengan variasi lampu UV dan lampu merkuri. Komposit ZnO/Graphene-like dikarakterisasi menggunakan SEM, XRD, FTIR, BET, UV-Vis DRS dan UV-Vis Spektrofotometer. Hasil penelitian menunjukkan bahwa persen degradasi methylene blue di bawah sinar UV dan merkuri masing-masing sebesar 83,42% dan 84,93%, sedangkan methyl orange dengan sinar UV dan merkuri masing-masing sebesar 94,83% dan 97,17%. Selanjutnya, persen degradasi fenol dengan sinar UV dan merkuri masing-masing adalah 86,03% dan 89,62%. Hal ini menunjukkan bahwa penggunaan lampu merkuri pada methyl orange lebih efektif dibandingkan lampu UV pada methylene blue dan fenol.

Revolutionizing Asphalt Engineering: Unveiling The Influence of Oil Palm Fiber Reinforcement on The Mechanical Attributes of Asphalt Mixtures Tamalkhani Syammaun; Hafnidar A Rani; Suhana Koting
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 1 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i1.21669

Abstract: The increasing demand for environmentally and economically sustainable technologies necessitates innovative approaches in material engineering. This study investigates the repurposing of waste materials by integrating oil palm fiber (OPFib) as reinforcement in porous asphalt mixtures. The primary objective is to examine the effects of adding varying amounts of OPFib (1%, 2%, 3%, 4%, and 5%) on the mechanical properties of asphalt, specifically aiming to improve the asphalt's softening point, viscosity, binder drain-down, and air void characteristics. The methodology involves a series of controlled laboratory tests under diverse conditions to measure these properties. The results indicate that adding OPFib enhances the performance of asphalt by raising the softening point and viscosity, decreasing binder drain-down, and achieving optimal air void levels at certain OPFib concentrations. However, higher OPFib content leads to diminished overall performance. These findings provide insights into the use of OPFib in asphalt mixtures, offering a sustainable solution that enhances road durability and performance, while effectively utilizing waste materials.Abstrak: Meningkatnya permintaan akan teknologi yang ramah lingkungan dan berkelanjutan secara ekonomi membutuhkan pendekatan inovatif dalam rekayasa material. Penelitian ini menyelidiki pemanfaatan kembali bahan limbah dengan mengintegrasikan serat kelapa sawit (OPFib) sebagai penguat pada campuran aspal porus. Tujuan utamanya adalah untuk menguji pengaruh penambahan OPFib dalam jumlah yang bervariasi (1%, 2%, 3%, 4%, dan 5%) terhadap sifat mekanik aspal, khususnya untuk meningkatkan titik lembek aspal, viskositas, aliran aspal dan karakteristik rongga udara. Metodologi yang digunakan adalah serangkaian pengujian laboratorium sebagai kontrol dalam berbagai kondisi untuk mengukur sifat-sifat tersebut. Hasilnya menunjukkan bahwa penambahan OPFib meningkatkan kinerja aspal dengan meningkatkan nilai titik lembek dan viskositas, mengurangi binder drain-down, dan mencapai tingkat rongga udara yang optimal pada konsentrasi OPFib tertentu. Namun, kandungan OPFib yang lebih tinggi menyebabkan penurunan kinerja secara keseluruhan. Temuan ini memberikan pemahaman tentang penggunaan OPFib dalam campuran aspal, menawarkan solusi berkelanjutan yang meningkatkan daya tahan dan kinerja jalan, sekaligus secara efektif memanfaatkan bahan limbah.

Photocatalytic Degradation of Batik Cual Wastewater Using Fe3O4/SiO2/TiO2 Composite Derived From Tin Tailing Fabiani, Verry Andre; Putri, Restani Eka; Davina, Lyra; Virliana, Zelfia
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 2 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i2.20506

Abstract: Batik cual dye wastewater is produced from the batik cual industry in Bangka, which contains Remazol dye, which is carcinogenic and a non-biodegradable organic compound that can be a pollutant for the environment. The elevated levels of remazol dyes in Batik Cual wastewater necessitate effective and environmentally safe waste management methods. One such method is photodegradation, utilizing a Fe3O4/SiO2/TiO2 composite photocatalyst derived from tin tailings sand. The Fe3O4/SiO2/TiO2 composites were synthesized via the hetero-agglomeration method. XRF characterization revealed that the SiO2 content, following purification with HNO3 acid leaching, reached 78.63%. XRD characterization of the tin tailings indicated the presence of peaks corresponding to quartz silica. Phase analysis using XRD diffractograms for the Fe3O4/SiO2/TiO2 composites showed peaks of magnetite, quartz silica, and a predominant anatase TiO2 phase with strong diffraction patterns at 2θ angles of 27.42°; 39.19°; 44.00°, and 54.29°. UV-DRS analysis determined the band-gap energy of the Fe3O4/SiO2/TiO2 photocatalyst to be 1.9 eV. Morphological SEM analysis indicated that the synthesized Fe3O4/SiO2/TiO2 composite had a spherical, uneven, rough, and porous surface. The photodegradation of the Fe3O4/SiO2/TiO2 composite on cual batik dye waste showed that the optimal contact time for photodegradation was 60 minutes, and the catalyst dose was 500 mg at 98.1%. Consequently, these findings confirm that the Fe3O4/SiO2/TiO2 composite is a viable photocatalyst for photodegradation in handling cual batik dye waste.Abstrak: Limbah zat warna batik cual dihasilkan dari industri batik cual di Bangka yang mengandung zat warna Remazol, bersifat karsinogenik dan merupakan senyawa organik non-biodegradable yang dapat menjadi pencemar bagi lingkungan Tingginya kadar zat warna remazol pada limbah batik cual membutuhkan penanganan limbah yang tepat dan aman bagi lingkungan. Salah satu metode yang dinilai efektif yaitu metode fotodegradasi menggunakan fotokatalis komposit Fe3O4/SiO2/TiO2berbahan pasir tailing timah. Karakterisasi XRF menunjukkan kadar SiO2 setelah dilakukan pemurnian acid leaching HNO3 mencapai 78,63%. Hasil karakterisasi XRD tailing timah menunjukkan terdapatnya puncak yang menandakan silika kuarsa. Komposit Fe3O4/SiO2/TiO2berdasarkan analisis fasa menggunakan XRD difraktogram menunjukkan puncak magnetit, silika kuarsa dan didominasi fasa TiO2 anatase pada sudut 2θ 27,42°; 39,19°; 44,00°; dan 54,29. Berdasarkan analisis UV-DRS didapatkan energi ban-gap untuk fotokatalis Fe3O4/SiO2/TiO2sebesar 1,9 eV. Analisis morfologi pada komposit Fe3O4/SiO2/TiO2 menunjukkan bentuk sperik, permukaan yang tidak rata, kasar dan berpori. Uji fotodegradasi komposit Fe3O4/SiO2/TiO2terhadap limbah zat warna batik cual didapatkan waktu kontak optimal fotodegradasi pada waktu 60 menit dan massa komposit 500 mg sebesar 98.1%. Sehingga dengan hasil tersebut dapat disimpulkan bahwa komposit dapat dijadikan fotokatalis dalam proses fotodegradasi dalam menangani limbah zat warna batik cual.

Oil Recovery From Spent Bleaching Earth With Reflux Extraction Method Using Acetonitrile and n-Hexane Solvent Maryudi Maryudi; Aster Rahayu; Totok Eka Suharto; Dhias Cahya Hakika; Ahmad Fatwa Zufar
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 1 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i1.16791

Abstract: The growth of the oleochemical industry generated a large amount of spent bleaching earth (SBE) solid waste that causes environmental problems. The SBE solid waste produced is reported at about 600,000 metric tons per year. Recovery of the oil from SBE can be an alternative solution to reduce the negative impact of SBE solid waste. In this study, the recovery of oil from SBE was carried out by the reflux extraction method followed by a study on its properties. The oil recovery process was conducted by using two different solvents (acetonitrile and n-hexane) at different particle sizes (40, 60, 100 mesh) of SBE, solvent-SBE ratios (2:1, 3:1, 4:1), and extraction time (1, 2, 3 hours). Experimental results showed that n-hexane extracted oil with yield ranged from 5 to 14.8%, while acetonitrile extracted oil with yield ranged from 0.68 to 8.4%. Product analysis shows that the oil extracted has a water content of 1.56% and 2.53% for acetonitrile and n-hexane, respectively. The viscosity analysis results show that the oil viscosities were 5.83 cSt (acetonitrile) and 5.09 cSt (n-hexane) which is in reasonable agreement with the Indonesian National Standard for vegetable oil (SNI 7709:2019). The result suggested that n-hexane provided better product yield than acetonitrile as a solvent for oil recovery from SBE. This study provides an alternative method and solution for the oleochemical industry in managing SBE waste.Abstrak : Pertumbuhan industri oleokimia menghasilkan limbah padat berupa tanah pemucat (spent bleaching earth/ SBE) yang mengakibatkan permasalahan lingkungan. Limbah padat SBE yang dihasilakn dilaporkan sekitar 600.000 ton per tahun. Pemisahan minyak dari SBE dapat menjadi alternatif penyelesaian masalah untuk menurunkan dampak negatif dari limbah SBE. Dalam penelitian ini, recovery minyak dari SBE dilakukan dengan metode ekstraksi reflux dan dilanjutkan karakterisasi hasil minyak. Recovery minyak dilakukan dengan dua jenis pelarut (asetonitril and n-heksana) dengan ukuran partikel SBE bervariasi (40, 60, 100 mesh), perbandingan pelarut-SBE (2:1, 3:1, 4:1), dan waktu ekstraksi (1, 2, 3 jam). Hasil penelitian menunjukkan bahwa asetonitril mengekstrak minyak dengan yield 1,56-2,53%, sementara n-heksana berkisar 5-14,8%. Minyak hasil ekstraksi menunjukkan kadar air 1.56% (asetonitril) and 2.53% (n-heksana), serta nilai viskositas sebesar 5.83 cSt (asetonitril) and 5.09 cSt (n-heksana). Minyak hasil memenuhi SNI Minyak goreng sawit (SNI 7709:2019). Hasil menunjukkan n-heksana memiliki kemampuan lebih baik dibanding asetonitril dalam mengekstrak minyak dari SBE. Hasil penelitian memberikan penyelesaian alternatif dalam menagngani limbah SBE dari industri oleokimia.

The Influence of Tilt Angle of 120 WP Solar Panels on Light Intensity and Generated Electrical Power Masthura Masthura; Abdul Halim Daulay
Elkawnie: Journal of Islamic Science and Technology Vol 10, No 1 (2024)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v10i1.20407

Abstract: In designing solar panel devices, generally the tilt angle of the panel surface is designed with a static design and this greatly influences the results of the electricity source generated. The design of the tool is intended to be in coordinates that are perpendicular to the direction of the sunlight rays so that it receives maximum solar radiation. This research aims to determine the relationship between the tilt angle of the solar panels and the light intensity and electrical power generated and to determine the optimal tilt angle of the solar panels based on the values of light intensity and electrical power. The indicators measured consist of light intensity, voltage, current and electrical power by varying the tilt angle of the solar panel. The results of this research show that the tilt angle of the solar panel greatly influences the measured light intensity value so that the greater the light intensity obtained, the higher the output voltage of the solar panel. The most optimal tilt angle is at an angle of 105o and 120o with the greatest light intensity so that the resulting output power is correspondingly greater.Abstrak: Dalam merancang alat panel surya, pada umumnya posisi kemiringan dari permukaan panel dirancang dengan desain statis sangat mempengaruhi hasil dari sumber listrik yang dihasilkan. Rancangan alat diupayakan berada di koordinat yang tegak lurus dengan arah pancaran cahaya matahari agar menerima radiasi matahari yang maksimal. Penelitian ini bertujuan untuk mengetahui hubungan posisi kemiringan panel surya terhadap intensitas cahaya dan daya listrik yang dihasilkan serta mengetahui posisi kemiringan panel surya yang optimal berdasarkan nilai intensitas cahaya dan daya listriknya. Indikator yang diukur terdiri dari intensitas cahaya, tegangan, arus, dan daya listrik dengan memvariasikan posisi kemiringan dari panel surya. Hasil penelitian ini menunjukkan posisi kemiringan sebuah panel surya sangat mempengaruhi nilai intensitas cahaya yang diukur sehingga semakin besar intensitas cahaya yang didapat maka tegangan keluaran panel surya mengalami kenaikan. Posisi kemiringan yang paling optimal pada sudut 105o dan 120o dengan intensitas cahaya yang didapat terbesar sehingga daya keluaran yang dihasilkan sejalan yaitu semakin besar pula.

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Ghufran Ibnu Yasa

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ghufran.yasa@gmail.com

Phone
+6285277813297

Journal Mail Official
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Editorial Address
Syeikh Abdur Rauf street, Kopelma Darussalam, Banda Aceh, Aceh, Indonesia

Location
Kota banda aceh,

Aceh

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Ghufran Ibnu Yasa

Contact Email ghufran.yasa@gmail.com

Phone +6285277813297

Journal Mail Official -

Editorial Address Syeikh Abdur Rauf street, Kopelma Darussalam, Banda Aceh, Aceh, Indonesia

Location Kota banda aceh, Aceh INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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Abstract

Contact Name
Ghufran Ibnu Yasa

Contact Email
ghufran.yasa@gmail.com

Phone
+6285277813297

Journal Mail Official
-

Editorial Address
Syeikh Abdur Rauf street, Kopelma Darussalam, Banda Aceh, Aceh, Indonesia

Location
Kota banda aceh,

Aceh

INDONESIA