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All Journal VALENSI Reaktor JURNAL KIMIA SAINS DAN APLIKASI JURNAL KESEHATAN LINGKUNGAN (Journal of Environmental Health) Biopropal Industri Jurnal Riset Industri Hasil Hutan Indonesian Journal of Science and Technology Konversi Info-Teknik JTERA (Jurnal Teknologi Rekayasa) Tropical Wetland Journal Buletin Profesi Insinyur Dinamika Kerajinan dan Batik : MAJALAH ILMIAH Jurnal Teknik Kimia Indonesia Jurnal Teknologi Berkelanjutan Jurnal Ilmiah Berkala: Sains dan Terapan Kimia JOURNAL OF WETLANDS ENVIRONMENTAL MANAGEMENT Jurnal Sains Materi Indonesia JURNAL REKAYASA KIMIA & LINGKUNGAN Jurnal Bahan Alam Terbarukan Dinamika Kerajinan dan Batik: Majalah Ilmiah
Chairul Irawan
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Lambung Mangkurat, South Kalimantan - 70714, Indonesia
Agriculture, Biological Sciences & Forestry Arts Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Transportation Other

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Kondisi Optimum Pemisahan Aseton dari Campuran Aseton-Etanol-Air-n–Butanol Dengan Kolom Distilasi Vacuum Chairul Irawan; Iryanti Fatyasari Nata
INFO-TEKNIK Vol 6, No 1 (2005): INFOTEKNIK VOL. 6 NO. 1 2005
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v6i1.1668

Abstract

Fermenting molasses using clostridium acetobutilycum can produce a mixture of acetone (1)/ethanol (2)/water (3)/n-butanol (4). The fermentation products are then separated and purified in a series of distillation column. In this work the products are 99.5-wt % of acetone and 99 % recovery.This work is primarily concerned with the effect of operating pressure on the distillation column performance. Distillation columns were designed using computer programs written in VISUAL FORTRAN 5.0. A rigorous equilibrium based computation method due to Wang-Henke that taking into account the effects of non-equal molar overflow and non-ideal vapor-liquid equilibrium was used in study. UNIQUAC, a method of estimating activity coefficient in non-ideal liquid mixtures, was used to model the vapor–liquid equilibrium. The column performance was studied by varying the operating pressure that is constrained by the cooling water temperature in the condenser. The numbers of plates are 50 and feed plate location at 12th plate below the condenser for acetone column. Variation of pressure 0.7 to 0.6 atm for acetone column will decrease 6.03 % reflux ratios, 4.3% condenser and 4.78% reboiler duty. Optimum condition for acetone column was 0.6 atm. 
Adsorpsi Logam Timbal Secara Batch dan Kontinu Menggunakan Karbon Aktif dari Cangkang Kelapa Sawit Chairul Irawan; Anisa Purwanti; Norhasanah Norhasanah
JTERA (Jurnal Teknologi Rekayasa) Vol 4, No 2: December 2019
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31544/jtera.v4.i2.2019.267-276

Abstract

Pada proses produksi industri kain Sasirangan, proses pewarnaan menghasilkan limbah cair berupa logam berat timbal (Pb). Penelitian ini bertujuan untuk mengetahui waktu kesetimbangan, dan efisiensi penurunan konsentrasi logam Pb pada limbah cair Sasirangan dengan proses batch dan kontinu ditinjau dari waktu kontak, dosis adsorben dan ukuran adsorben cangkang kelapa sawit. Proses karbonisasi berlangsung selama 4 jam pada suhu 105oC. Cangkang kelapa sawit yang digunakan sebagai adsorben diaktivasi menggunakan kalium hidroksida (KOH) 25% (b/v) selama 24 jam dengan variasi ukuran 355 µm dan 710 µm. Proses adsorpsi dilakukan dengan konsentrasi awal Pb sebesar 151 mg/L, pH 5, kecepatan pengadukan 200 rpm, dan suhu kamar pada variasi waktu tertentu.  Analisa yang dilakukan yaitu Brunauer-Emmett-Teller (BET) untuk mengetahui luas permukaan adsorben dan Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) untuk mengetahui kadar logam di dalam limbah setelah dilakukannya proses adsorpsi. Hasil penelitian menunjukkan bahwa surface area berdasarkan analisa BET adsorben dari cangkang kelapa sawit sebelum dan setelah aktivasi sebesar 10,125 m2/gram dan 16,314 m2/gram. Eksperimental proses adsorpsi secara batch menunjukkan bahwa adsorben cangkang kelapa sawit efektif dalam mengadsorpsi kandungan logam Pb dengan waktu kesetimbangan 24 jam, dosis optimum 2,5 g/L, dan ukuran adsorben 355 µm dengan penurunan konsentrasi dan kadar Pbteradsorb 1,41 mg/L dan 98,47 %. Efisiensi penurunan kandungan logam Pb pada proses adsorpsi batch sebesar 99,07 %, sedangkan dengan proses adsorpsi secara kontinu sebesar 95,23 %.
PREPARASI DAN KARAKTERISASI KATALIS Ni, Co YANG DIEMBANKAN PADA ZEOLIT-ZCP-50 MENGGUNAKAN METODE MATRIK POLIMER Rodiansono Rodiansono; Chairul Irawan; Dwi Rasy Mujiyanti
Jurnal Sains dan Terapan Kimia Vol 3, No 1 (2009)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (551.433 KB) | DOI: 10.20527/jstk.v3i1.2023

Abstract

Telah dilakukan preparasi katalis Ni, Co, dan kombinasinya (Ni-Co) yang diembankan pada hybrid zeolite-ZCP-50 menggunakan metode matrik polimer PEG-6000. Katalis hasil preparasi dikarakterisasi meliputi keasaman (ammonia dan pyridine), luas permukaan, volume pori menggunakan metode adsorpsi isotermal N2 (BET), difraksi sinar-X (XRD) and SEM (scanning electron microscopy). Hasil karakterisasi menunjukkan bahwa katalis logam Ni, Co dan Ni-Co telah berhasil dipreparasi menggunakan metode matrik polimer dengan tingkat keasaman tertinggi pada Co/zeolite-ZCP-50 (monometallic), dan Ni-Co/zeolite-ZCP-50 untuk katalis bimetallic. Penambahan ZCP-50 pada zeolit memberikan kontribusi yang besar pada luas permukaan spesifik, rerata jejari pori dan volume total pori. Tingkat dispersi logam pada permukaan padatan pengemban zeolite-ZCP-50 lebih baik dibandingkan dengan zeolite asal. Kata kunci: katalis, Ni dan Co, zeolit, ZCP-50, pengemban hybrid 
Karakterisasi Fisik Komposit Plastik Polyethylene Terephthalate (PET) Berbasis Serat Alam Daun Pandan Laut (Pandanus tectorius) dan Aplikasinya sebagai Bahan Baku Casing pada Produk Elektronik Nuryati Nuryati; Yuliana Ningsih; Huzairi Huzairi; Chairul Irawan
Buletin Profesi Insinyur Vol 4, No 2 (2021): Buletin Profesi Insinyur (Juli-Desember)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/bpi.v4i2.101

Abstract

Komposit merupakan material yang terbentuk dari kombinasi antara dua atau lebih material pembentuknya yang terdiri dari matriks (perekat atau pengikat dan pelindung) dan filler (penguat). Tujuan dari penelitian ini adalah mendeskripsikan cara pembuatan komposit berbasis serat alam daun pandan laut sebagai pengisi serta menentukan karakteristik fisik komposit berbasis serat alam daun pandan laut. Pembuatan komposit melalui 4 tahapan yaitu pembuatan serbuk daun pandan laut, pembuatan fraksi selulosa, pembuatan matriks limbah plastik polyethylene terephthalate (PET), dan pembuatan atau pencetakan komposit. Berdasarkan hasil penelitian komposit memiliki kadar air yaitu 4,4% - 5,53%, densitas 0,50 g/cm3- 0,53 g/cm3,  porositas 11,67% - 18,03%, daya serap air  13,03% - 60,12% dan biodegradabilitas 3,18%/hari -3,68%/hari. Penentuan karakterisasi komposit terbaik yang diperoleh yaitu jenis KPL 2 (20% filler selulosa daun pandan laut : 80% matriks pellet polyethylene terephthalate) karena memiliki kadar air, densitas, dan porositas yang sesuai SNI 01-4449-2006, sedangkan daya serap biodegradabilitas sesuai standar JIS A5905-2003. Kata Kunci: Pandan laut, komposit, selulosa, serat alam, casing.
Konversi Mikroalga Nannochloropsis s.p menjadi Biodiesel melalui Proses Transesterifikasi secara In-Situ Yustia Wulandari Mirzayanti; Rachmad Edo Syafutra; Yulia Vinataningsih; Chairul Irawan
Buletin Profesi Insinyur Vol 4, No 2 (2021): Buletin Profesi Insinyur (Juli-Desember)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/bpi.v4i2.113

Abstract

Salah satu bahan bakar minyak alternatif yang dapat menjadi salah satu sumber energi pengganti fosil adalah biodiesel. Bahan baku biodiesel yang paling banyak digunakan saat ini adalah minyak nabati, yaitu minyak sawit. Namun, bahan baku ini sangat terkendala dengan masa panen dan juga merupakan komoditas pangan. Oleh sebab itu, pada generasi ke empat ini, minyak yang berasal dari mikroalga memiliki peluang yang besar untuk menjadi bahan baku bahan bakar minyak. Minyak mikroalga memiliki kandungan asam lemak sekitar 68% pada Nannochloropsis.sp. Konversi minyak mikroalga Nannochloropsis s.p menjadi biodiesel menggunakan metode transesterifikasi secara In-Situ dengan bantuan katalis H2SO4. Penelitian ini berfokus pada pengaruh variasi rasio molar massa mikroalga:methanol (1:3; 1:5; 1:7; 1:9; dan 1:11) dengan konsentrasi katalis (%berat) sebanyak 10% terhadap berat minyak mikroalga. Berdasarkan hasil yang diperoleh, maka variasi rasio molar minyak mikroalga:methanol yang terbaik adalah 1:11 dengan kadar Free Fatty Acid (FFA) sebesar 0,315 mgNaOH/g dan yield crude biodiesel yang dihasilkan sebanyak 35%.Kata kunci: Mikroalga, Nannochloropsis s.p, biodiesel, In-Situ Transesterifikasi, Katalis Homogen, dan H2SO4
Utilization of Rice Husk Cellulose as a Magnetic Nanoparticle Biocomposite Fiber Source for the Absorption of Manganese (Mn2+) Ions in Peat Water Emil Zacky Effendi; Yudhi Christian Hariady; Muhammad Daffa Salaahuddin; Chairul Irawan; Iryanti Fatyasari Nata
Jurnal Kimia Sains dan Aplikasi Vol 22, No 6 (2019): Volume 22 Issue 6 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2720.31 KB) | DOI: 10.14710/jksa.22.6.220-226

Abstract

Rice husk (RH) is an agricultural waste that contains cellulose. Rice husk fiber (RHF) can be used as a source of fiber in the manufacture of magnetic nanoparticle biocomposite. The purpose of this study is to synthesize and characterize magnetic nanoparticle biocomposite used as an adsorbent and evaluate its performance on the adsorption of  Mn2+ ions and Total Suspended Solid (TSS) in peat water. Rice husk fiber was delignified to eliminate lignin levels. Furthermore, the biocomposite was made through the solvothermal method with and without the addition of hexanediamine. The products produced are two types of adsorbents, namely magnetic nanoparticle biocomposite with an amino group (RHB-MH) and rice husk fiber biocomposite without an amino group (RHB-M). These biocomposites were used to adsorb Mn2+ ions in peat water. Evaluations were carried out at pH 5, 6, 7, and 8 with an optimum adsorption time of 60 minutes. The solutions at the time of adsorption were evaluated to determine the optimum conditions of the adsorption process carried out. The observation of magnetic nanoparticle biocomposite based on the analysis of Scanning Electron Microscopy (SEM) shows magnetic nanoparticles formed on the surface of rice husk fiber with a diameter of 30-50 nm. X-Ray Diffraction (XRD) analysis showed that the delignification of rice husk increased Crystallinity Index (CrI) by 64.98% and reduced silica content by 78%. Fourier Transform Infra-Red (FT-IR) spectrometer show absorption peak at 570 cm-1 for Fe-O bonds and Fe3O4 peak around 1627 cm−1, indicating the presence of N-H bending. The optimum condition for Mn2+ adsorption was achieved at pH 5 and 60-minutes duration with an adsorption capacity of 54.7 mg/g and 190.78 mg/g for RHB-M and RHB-MH. The TSS reduction achieved the effectiveness of 60.2% and 90.3% for BSP-M and BSP-MH, respectively.
Penyisihan Bahan Organik Alami pada Desalinasi Air Rawa Asin Menggunakan Proses Koagulasi-Pervaporasi Aulia Rahma; Muthia Elma; Mahmud Mahmud; Chairul Irawan; Amalia Enggar Pratiwi; Erdina Lulu Atika Rampun
Jurnal Kimia Sains dan Aplikasi Vol 22, No 3 (2019): Volume 22 Issue 3 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3226.511 KB) | DOI: 10.14710/jksa.22.3.85-92

Abstract

The high number of natural organic matter contain in wetland water may cause its water has brown color and not consumable. In other hand, intrusion of sea water through wetland aquifer create water become saline, notably on hot season. Coagulation is effective method to applied for removing of natural organic matter. However, it could not be used for salinity removal. Hence combination of coagulation and pervaporation process is attractive method to removing both of natural organic matter and conductivity of wetland saline water. The objective of this works is to investigate optimum coagulant doses for removing organic matter by coagulation process as pretreatment and to analysis performance of coagulation-pervaporation silica-pectin membrane for removing of organic matter and conductivity of wetland saline water. Coagulation process in this work carried out under varied aluminum sulfate dose 10-60 mg.L-1. Silica-pectin membrane was used for pervaporation process at feed temperature ~25 °C (room temperature). Optimum condition of pretreatment coagulation set as alum dose at 30 mg.L-1 with maximum removal efficiency 81,8 % (UV254) and 40 % (conductivity). In other hand, combining of coagulation-pervaporation silica-pectin membrane shows both of UV254 and salt rejection extremely good instead without pretreatment coagulation of 86,8 % and 99,9 % for UV254 and salt rejection respectively. Moreover, water flux of silica-pectin membrane pervaporation with coagulation pretreatment shown higher 17,7 % over water flux of wetland saline water without pretreatment coagulation. Combining of coagulation and pervaporation silica-pectin membrane is effective to removing both of organic matter and salinity of wetland saline water at room temperature.
Rice Husk Demineralization: Effect of Washing Solution on Its Physicochemical Structure and Thermal Degradation Hesti Wijayanti; Iryanti Fatyasari Nata; Chairul Irawan; Rinny Jelita
Jurnal Kimia Sains dan Aplikasi Vol 24, No 2 (2021): Volume 24 Issue 2 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2585.422 KB) | DOI: 10.14710/jksa.24.2.37-42

Abstract

Generally, biomass consists of various amounts of minerals. These minerals influence the biomass characteristics and behavior during their use in a thermochemical process such as pyrolysis. The conversion during pyrolysis and its final product will be affected. This research was carried out to study the impact of washing treatment in water and acid solutions on the rice husk as the raw material for pyrolysis. Also, the effect of acid strength (citric acid as the weak acid while nitric acid as the strong acid) and its concentration (1, 5, and 10 wt.%) was investigated. The results confirmed from the thermogravimetry (TGA/DTG) analysis, surface analysis (SEM), and spectra (FTIR) analysis describe the treatment using water caused less change on the rice husk surface structure and its thermal degradation. However, it seems hard to reduce the minerals (proved from XRF analysis). Meanwhile, the treatment using acids solution resulted in lower mineral composition than the rice husk without treatment. This result is more visible for demineralization using a 5 wt.% nitric acid solution. However, for a higher concentration (washing treatment using 10 wt.% solutions of nitric acid), the degradation on rice husk structure was more occurred.
Bioethanol Production from Cassava Peel Treated with Sulfonated Carbon Catalyzed Hydrolysis Primata Mardina; Chairul Irawan; Meilana Dharma Putra; Sylvera Bella Priscilla; Misnawati Misnawati; Iryanti Fatyasari Nata
Jurnal Kimia Sains dan Aplikasi Vol 24, No 1 (2021): Volume 24 Issue 1 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3691.64 KB) | DOI: 10.14710/jksa.24.1.1-8

Abstract

A large amount of Cassava peel as biomass waste is generated by agricultural activities, and it led to a new pursuit to exploit the utilization of biomass waste. This research aimed to study the potential of Cassava peel as raw material for bioethanol production. This study was performed in 2 main processes, acid hydrolysis, and fermentation. The experiment was initiated by conducting acid hydrolysis (100°C and 60 min) on Cassava peel’s starch using sulfonated carbon catalyst palm oil empty fruit bunch (5%-w/v) to produce 13.53 g/L glucose. The glucose contained hydrolysates then continued to ferment at 30°C. The effect of fermentation time (h), pH, and shaking rate (rpm) of cassava peel’s starch fermentation using Saccharomyces cerevisiae was analyzed. The best result was found at pH 4.5 and 50 rpm for a 24 h reaction with 3.75 g/L of bioethanol concentration. This study revealed that Cassava peel is a promising feedstock for biofuel production.
Potential Alternative Energy of Hybrid Coal from Co-pyrolysis of Lignite with Palm Empty Fruit Bunch and the Kinetic Study Rinny Jelita; Iryanti Fatyasari Nata; Chairul Irawan; J. Jefriadi; Meda Nur Anisa; Muhammad Jauhar Mahdi; Meilana Dharma Putra
Indonesian Journal of Science and Technology Vol 8, No 1 (2023): IJOST: April 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i1.53149

Abstract

Lignite is classified as a low-rank coal due to its low content of calories. Co-pyrolysis with biomass waste such as palm empty fruit bunches (EFB) here can be used to increase lignite’s economic value. The mixture of these two materials can produce an alternative energy source called hybrid coal (HC). This study aims to determine the optimum temperature for co-pyrolysis of lignite and EFB as well as characterize liquid (tar) and solid product (HC). Its kinetic study was evaluated as well. A raw material of 200 grams with a composition of 22.5% (w/w) EFB to lignite was put into a reactor to react at a temperature range of 300-450oC for 1 hour. To form hybrid coal briquettes (HCB),tapioca adhesive with a concentration of 6% (w/w) was added to the solid product (HC). The results showed that the tar yield increased with increasing temperature from 300 to 450oC. Similarly, the calorific value of HC increased by 14.50% as also occurred in other physical properties of HC. Meanwhile, the kinetic study revealed that the model was well-fitted to the data, and confirmed the obtained results. Thus, this research can support the development of affordable alternative energy to be implemented in large-scale production.
Co-Authors A. Mourad, Khaldoon Abdi Fithria Abubakar Tuhuloula Agita Purnawilda Agita Purnawilda Agus Mirwan Agus Mirwan Agus Mirwan Akhmad R Saidi Al-Muttaqii, Muhammad Aliah aliah Amalia Enggar Pratiwi Ammara Ulfa Azizah Andika Putri Paramita Andri Taruna Rachmadi Andri Taruna Rachmadi, Andri Taruna Anisa Purwanti Aproditha Yulianingtias ARDIANSYAH ARDIANSYAH Ardiansyah Ardiansyah Ardiansyah Ardiansyah Asnia, Mira Aulia Rahma Ayu Ratma Sari Bibin Bintang Andriana Danang Biyatmoko Danang Biyatmoko, Danang Dwi Rasy Mujiyanti Emil Zacky Effendi Erdina Lulu Atika Rampun Fatyasari Nata, Iryanti H.D Lasari, Hadrianti Hesti Wijayanti Hesti Wijayanti Husaini Huzairi Huzairi Iryanti Fatyasari Nata, Iryanti Fatyasari Jefriadi Jefriadi Khoiroh, Ianatul Laily Khairiyati Lenie Marlinae Lenie Marlinae Loveana Brena Honesty, Loveana Brena M. Ratodi Mahmud Mahmud Maimunawaro Maimunawaro Marisa, Rosmasari Maulana Wahyu Noor Ramadhan Meda Nur Anisa Megayulia Nooryaneti Meilana Dharma Putra Melinda, Rizani Aulia Mira Asnia Misnawati Misnawati Mu'minah, Ridhayanti Muhammad Abrar Firdausy Muhammad Daffa Salaahuddin Muhammad Jauhar Mahdi Muhammad Sadiqul Iman Muthia Elma Naisya Hanan Naisya Hanan, Naisya Nata, Iryanti Naufal, Allam Nino Rinaldi Norhasanah Norhasanah Norhasanah Norhasanah, Norhasanah Nuryati Nuryati Paramita, Andika Putri Primata Mardina Purnawilda, Agita Purwanti, Anisa R Saidi, Akhmad Rachmad Edo Syafutra Ridhayanti Mu'minah Ridhayanti Mu'minah Rinna Juwita Rinny Jelita Riskawanti Suwandi Riskawanti Suwandi, Riskawanti Rizani Aulia Melinda Rodiansono Rodiansono Rosmasari Marisa Sari, Ayu Ratma Sazila Karina Rahman Setiawan, Muhammad Fazar Sherly Uthami W.P.H Sherly Uthami W.P.H, Sherly Uthami Syamsul Arifin Syamsul Arifin Sylvera Bella Priscilla Tiara Nur Awalia Tiara Nur Awalia, Tiara Nur Tien Zubaidah Waskito, Agung Yudhi Christian Hariady Yulia Vinataningsih Yulian Firmana Arifin Yuliana Ningsih Yulianingtias, Aproditha Yustia Wulandari Mirzayanti