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All Journal VALENSI Prosiding Pendidikan Sains Jurnal Riset Kimia Jurnal Litbang Industri Jurnal Zarah Alotrop Jurnal Pendidikan dan Ilmu Kimia Chimica et Natura Acta IJEMS (Indonesian Journal of Environmental Management and Sustainability) Jurnal Katalisator Eksakta : Berkala Ilmiah Bidang MIPA Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Hydrogen: Jurnal Kependidikan Kimia Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurnal Litbang Industri Journal Of Research and Education Chemistry (JREC) Jurnal Katalisator Journal of The Indonesian Society of Integrated Chemistry Jurnal Kimia Unand
Rahmiana Zein
Andalas University
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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PEMANFAATAN ZEOLIT ALAM CLINOPTILOLITE-Ca SEBAGAI PENDUKUNG KATALIS ZnO UNTUK MENDEGRADASI ZAT WARNA METHYL ORANGE DENGAN METODA FOTOLISIS Zilfa; Rahmiana Zein; Teti Nurhayatul Rahmi
Journal of Research and Education Chemistry Vol. 5 No. 1 (2023): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2023.vol5(1).12505

Abstract

Penelitian mengenai degradasi zat warna Methyl Orange dengan metoda fotolisis menggunakan katalis ZnO/zeolit telah dilakukan. Penelitian ini bertujuan untuk mengurangi kadar zat warna Methyl Orange yang diketahui berbahaya bagi lingkungan dan kesehatan. Pada penelitian ini digunakan zat warna Methyl Orange dengan konsentrasi 6 mg/L, selanjutnya didegradasi secara fotokatalisis dengan beberapa variasi waktu dan massa katalis untuk mengetahui kondisi optimum dari degradasi Methyl Orange. Analisis hasil degradasi diukur menggunakan spektrofotomet UV-VIS. Berdasarkan hasil penelitian diperoleh persentase degradasi Methyl Orange dengan beberapa perlakuan, yaitu dengan tanpa katalis, dengan zeolit, dengan ZnO. dan dengan ZnO/zeolit . Hasil analisis menunjukkan degradasi tanpa katalis adalah 5,83%, menggunakan zeolite 32,51%, dan menggunakan ZnO 60,09%, selama waktu irradiasi 90 menit.Selanjutnya degradasi menggunakan katalis ZnO/zeolit persentase degradasi Methyl Orange meningkat menjadi 93,27% (massa katalis 0,8 g dan waktu irradiasi 90 menit). Analisis hasil degradasi metil orange menggunakan FTIR didapatkan behwa terjadi pergeseran bilangan gelombang yang menyatakan terjadinya degradasi. Karakterisadi katalis ZnO/zeolite menggunakan FTIR dan XRD tidak terjadi perubahan struktur dari ZnO/zeolite yang berarti bahwa ZnO/zeolite dapat digunakan sebagai katalis dalam degradasi methyl orange. Berdasarkan data tersebut dapat dikatakan bahwa katalis ZnO/zeolit berhasil meningkatkan persentase degradasi Methyl Orange dibandingkan menggunakan katalis ZnO saja dan zeolit saja.
MODIFICATION LEAF DREGS OF LEMONGRASS WITH CITRIC ACID FOR Cd(II) REMOVAL Rahmiana Zein; Syiffa Fauzia; Mutiara Suciandica
JURNAL KATALISATOR Vol. 7 No. 1 (2022): Jurnal Katalisator Volume 7 Nomor 1, April 2022
Publisher : LLDIKTI X Sumbar, Riau, Jambi, Kepri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1255.791 KB) | DOI: 10.22216/katalisator.v7i1.963

Abstract

The present research was studied the capability of leaf dregs lemongrass (LDLG) and modified LDLG by Citric Acid (LDLGCA) for Cd(II) removal.  The optimum conditions for both biosorbents at pH 5, stirring speed 200 rpm, contact time 60 minutes, and temperature 25 ᵒC. The optimum concentration LDLG was 120 mg/L and 160 mg/L  LDLGCA with adsorption capacity 10.63 mg/g and 11.66 mg/g, respectively. Isotherm models revealed that the adsorption of LDLG and LDLGCA followed Langmuir isotherm model with coefficient determination (R2) 0.98 LDLG and 0.93 LDLGCA. Both biosorbents were fitted to pseudo-second-order indicating that adsorption process chemically occurring. Adsorption Cd(II)  LDLG spontaneous reactions and exothermic, meanwhile for Cd(II) removal LDLGCA not spontaneous and exothermic. The characterization biosorbents was done using  FTIR, XRF, SEM – EDX and BET. The adsorption capacity of both biosorbents decreased after 3 times adsorption-desorption cycles. Applications biosorbents to the real wastewater (Laboratory wastewater)  indicated that LDLG can remove Cd(II) up to 46.88 % and  LDLGCA reached the peak at  52.14 %. Based on XRF data, the percentage of Cd(II) in both adsorbents increased up to 21.12% for LDLG and 24.04 % for LCGA. The result indicated that Citric Acid was quite effective as modifier for Cd(II) removal.
ISOTHERM, KINETICS, AND THERMODYNAMIC STUDIES FOR ADSORPTION METHYLENE BLUE SOLUTION USING SHRIMP SHELL Suci Wulandari; Hamdhan Fathony; Putri Ramadhani; Deswati; Rahmiana Zein
JURNAL KATALISATOR Vol. 8 No. 1 (2023): Jurnal Katalisator Volume 8 No. 1, April 2023
Publisher : LLDIKTI X Sumbar, Riau, Jambi, Kepri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.866 KB) | DOI: 10.62769/katalisator.v8i1.2091

Abstract

This research was carried out adsorption of methylene blue dye using shrimp shell (SS) biosorbent. Methylene blue dye is commonly used in the textile and paper industries. Previously, research had been carried out on the adsorption of anionic dyes by shrimp shells, then in this study a batch adsorption was carried out to absorb methylene blue cationic dyes.It is carried out in batches with several parameters to obtain the optimum conditions. Several studies were carried out such as isotherm studies, kinetics and thermodynamics to analyze how the adsorption process occurs. The adsorption process followed the Langmuir isotherm model for the two biosorbents which showed the formation of monolayers, the kinetic model followed the second-order pseudo. The thermodynamic study of shrimp shells showed that the adsorption process was non-spontaneous, endothermic, and increased randomness. FTIR analysis shows that there are electrostatic interactions, cation exchange, and hydrogen bonding. SEM-EDX analysis shows that the pore filling of the biosorbent surface by methylene blue molecules occurs.
THERMODYNAMIC STUDY OF METHYLENE BLUE DYE ADSORPTION USING KAPOK HUSK Hamdhan Fathony; Suci Wulandari; Putri Ramadhani; Rahmiana Zein; Deswati
JURNAL KATALISATOR Vol. 8 No. 1 (2023): Jurnal Katalisator Volume 8 No. 1, April 2023
Publisher : LLDIKTI X Sumbar, Riau, Jambi, Kepri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.349 KB) | DOI: 10.62769/katalisator.v8i1.2092

Abstract

This research discusses the thermodynamics of methylene blue(MB) adsorption using kapok husk (KH) and kapok huskmodified with citric acid (CA-KH). Both biosorbents obtained thermodynamic results with a negative value of the change in Gibbs energy (∆G), indicating that the adsorption process took place spontaneously, a negative value on enthalpy (∆H), indicating the adsorption process was an exothermic process, and a negative entropy value (∆S) indicating an increase The regular distribution of methylene blue dye on the surface during the adsorption process is proven by the results of SEM photo analysis at 3000x magnification with the distribution of methylene blue dye on the surface of the two biosorbents..
Pelatihan Praktikum Kimia Sederhana di SMAN 16 Padang Imelda Imelda; Refinel Refinel; Refilda Refilda; Yefrida Yefrida; Hermansyah Aziz; Yulizar Yusuf; Suryati Suryati; Zulkarnain Chaidir; Sumaryati Syukur; Rahmiana Zein; Novesar Jamarun; Safni Safni; Zilfa Zilfa; Yetria Rilda; Norman Ferdinal; Tommi Hermansyah; Fivi Mona Bareno
Warta Pengabdian Andalas Vol 30 No 3 (2023)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.30.3.562-568.2023

Abstract

Chemistry is one of the subjects taught in State Senior High Schools (SMAN), especially in Natural Sciences (IPA). The problem with chemistry subjects is that it is difficult to practice in the laboratory because laboratory facilities such as space, equipment and chemicals are expensive. As a result, chemical laboratory practices were only sometimes carried out. Several lecturers and students from the Department of Chemistry, FMIPA Unand Kimia Unand, carried out service activities at SMAN 16 Padang through laboratory practice using materials and equipment that were cheap and readily available in the surrounding environment. This community service aims to train teachers and students to carry out chemistry practicums using simple materials and equipment available around them. The training was given to chemistry subject teachers and students in the science laboratory at SMAN 16 on 17 and 21 November 2022. The material was practised in oxidation and reduction (redox) and electrolysis reactions. The activity went smoothly; the students enthusiastically carried out the practicum. Through the results of this simple chemistry practicum, students can design and carry out chemical experiments using simple tools and materials, conduct direct observations of chemical processes, practice scientific thinking, attitude and work skills and analyze and solve various scientific processes using scientific methods. SMAN 16 hopes that this activity will continue with different topics.
KARAKTERISASI KOLOM MONOLIT METHACRYLATE-BASED POLYMER YANG DIMODIFIKASI DENGAN TRIMETILAMIN Fitri Mairizki; Rahmiana Zein; Edison Munaf
Jurnal Katalisator Vol 2, No 2 (2017): KATALISATOR
Publisher : LLDIKTI Wilayah X

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.101 KB) | DOI: 10.22216/jk.v2i2.2457

Abstract

Methacrylate-based polymer monolithic column provide higher polarity and better stability over a wide pH range so itswidely used as stationary phase in ion chromatography. Therefore, the aim of this research was to determine the characteristic of methacrylate-based polymer monolithic column modified with trimethylamine including surface morphology, functional group, permeability, and ion exchange capacity.Methacrylate-based polymer monolithic column was prepared in fused-silica capillary (80 mm, 0,32 mm i.d. x 0,45 mm o.d.), by in situ polymerization reaction using glycidyl methacrylate as monomer; ethylene dimethacrylate as crosslinker; 1-propanol, 1,4-butanediol, and water as porogene; trimethylamine as modifier.  The morphology of the monolithic column was characterized by using  Scanning Electron Microscope (SEM) and functional group wascharacterized by using Fourier Transform Infra Red Spectroscopy (FT-IR). Monolith columnhas good mechanical stability with permeability was 9.88x10-7 mL//m and ion exchange capacity was 82,10 mmol /mL.Kolom monolit methacrylate-based polymer memberikan polaritas yang lebih tinggi dan stabilitas yang lebih baik pada rentang pH yang luas sehingga menjadi fasa diam yang banyak digunakan pada kromatografi ion.Oleh karena itu, tujuan penelitian ini adalah untuk menentukan karakteristik kolom monolit methacrylate-based polymer yang dimodifikasi dengan trimetilamin meliputi bentuk morfologi permukaan, gugus fungsi, permeabilitas, dan kapasitas penukar ion.Kolom monolit dibuatpada fused-silica capillary (80 mm, 0,32 mm i.d. x 0,45 mm o.d.) dengan reaksi polimerisasi in situ menggunakan glisidil metakrilat sebagai monomer; etilen dimetakrilat sebagai crosslinker; 1-propanol, 1,4-butanadiol, dan air sebagai porogen; trimetilamin sebagai modifier. Bentuk morfologi permukaan kolom monolit dikarakterisasi dengan Scanning Electron Microscope (SEM) dan gugus fungsi dikarakterisasi dengan Fourier Transform Infra Red Spectroscopy (FT-IR).Kolom monolitmemiliki kestabilan mekanik yang baik dengan permeabilitas sebesar 9,88x10-7 mL/m dan kapasitas penukar ion sebesar 82,10 mmol/mL. 
ANALISA EFISIENSI PENYERAPAN ION LOGAM MENGGUNAKAN CANGKANG BUAH KETAPANG (Terminalia catappa L.) Linda Hevira; Rahmiana Zein; Edison Munaf
Jurnal Katalisator Vol 4, No 1 (2019): KATALISATOR
Publisher : LLDIKTI Wilayah X

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (933.748 KB) | DOI: 10.22216/jk.v4i1.3358

Abstract

On cause of environmental pollution is the presence of heavy metals. Heavy metal such as Cd (II), Pb (II) and Cu (II) are the metals commonly found in water pollution. The untapped shell of ketapang fruit can be used as an absorbent because it has an active side that can bind to the metal ion. From the research with batch sistem was found that the absorption efficiency of metal Cd (II), Pb (II) and Cu (II) by shell of ketapang will be optimum if done at pH 6 with contact time 60 minute for ion Cd(II), 45 minute for ion Pb (II) and 75 minute for ion Cu. The optimum stirring speed of each is 100 rpm, 150 rpm and 100 rpm. The optimum absorption efficiency occured at concentration of 10 mg/L on metal Cd (II) and Pb (II) that are 86,38 % and 98,51 % while the Cu (II) metal at 5 mg/L concentration is 94,06 % with mass of ketapang 0.1 g,0.5 g and 0.5 g each metal ion. The metal ion concentration was analyzed by AAS and the dominant functional group binding metal ions was analiyzed by FTIR Salah satu penyebab pencemaran lingkungan adalah terdapatnya logam berat. Logam berat seperti Cd, Pb dan Cu merupakan logam yang sering ditemukan dalam pencemaran air. Cangkang buah ketapang yang tidak termanfaatkan dapat dijadikan sebagai penyerap karena mempunyai sisi aktif yang dapat berikatan dengan ion logam. Dari penelitian dengan sistem batch didapatkan bahwa efisiensi penyerapan ion logam Cd (II), Pb (II) dan Cu II) oleh cangkang buah ketapang akan optimum jika dilakukan pada pH 6 dengan waktu kontak 60 menit untuk ion Cd (II), 45 menit untuk ion Pb (II) dan 75 menit untuk ion Cu (II). Kecepatan pengadukan optimum masing-masingnya adalah 100 rpm, 150 rpm dan 100 rpm. Efisiensi penyerapan optimum terjadi pada konsentrasi 10 mg/L pada logam Cd(II) dan Pb (II) yaitu 86,38 % dan 98, 51 %, sedangkan logam Cu (II) terjadi pada konsentrasi 5 mg/L yaitu 94,06 % dengan massa cangkang buah ketapang 0.1 g, 0.5 dan 0.5 g pada masing-masing ion logam. Konsentrasi ion logam dianalisis dengan Spektrofotometri Serapan Atom dan gugus fungsi dominan yang mengikat ion logam dianalisis dengan FTIR.
Studi Komparasi Model Langmuir, Freundlich dan Emzha untuk Biosorpsi Beberapa Ion Logam Rahmiana Zein; Zulfi Zulfi; Riza Nurafni
Jurnal Katalisator Vol 4, No 2 (2019): KATALISATOR
Publisher : LLDIKTI Wilayah X

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22216/jk.v4i2.4171

Abstract

Telah dilakukan studi komparasi untuk menguji keandalan model EMZHA dibandingkan model Langmuir dan Freunlich dalam penyerapan ion logam Cu(II), Cd(II) dan Pb(II) oleh beberapa biosorben. Model EMZHA adalah model adsorbsi baru yang diusulkan oleh peneliti Indonesia sebagai upaya mendapatkan model yang lebih bersifat universal (berlaku untuk semua tipe data) sehingga dapat digunakan untuk mengungkap mekanisme adsorbsi secara lebih lengkap dan mendasar. Model Langmuir dan Freunlich dipillih sebagai pembanding karena kedua model ini paling banyak digunakan dan memiliki karakter yang cenderung berlawanan. Penelitian ini digunakan data ekperimen dalam bentuk aslinya,  tidak diubah kedalam bentuk linier terlebih dahulu, dengan tujuan untuk menghindari error yang timbul akibat proses linierisasi. Regresi yang digunakan adalah regresi non linier. Metode penelitian ini dibagi dalam dua tahapan yaitu tahap pengumpulan data eksperimen yang berasal dari berbagai penelitian adsorbsi ion logam berat oleh berbagai biosorben dan pengolahan data komparasi model. Pengusul model EMZHA telah melaporkan keandalan prediksi model ini untuk penyerapan beberapa ion logam tapi hanya menggunakan satu jenis biosorben, yaitu kulit buah atap, sedangkan penelitian ini menggunakan 11 biosorben yang berbeda. Pada penelitian ini berhasil dibuktikan bahwa model EMZHA memiliki koefisien determinasi rata-rata 0,9034 yang lebih tinggi dari rata-rata koefisien determinasi model Langmuir (0,8485) dan Freundlich (0,8483).Comparative studies have been conducted to test the reliability of the EMZHA model compared to the Langmuir and Freunlich models in the absorption of Cu (II), Cd (II) and Pb (II) metal ions by several biosorbents. The EMZHA model is a new adsorption model proposed by Indonesian researchers in an effort to obtain a more universal model (applicable to all types of data) so that it can be used to uncover the mechanism of adsorption more fully and fundamentally. Langmuir and Freunlich's models are chosen as a comparison because these two models are the most widely used and have opposing characters. This study used experimental data in its original form, not converted into linear form first, with the aim of avoiding errors arising from the linearization process. The regression used is non linear regression. This research method is divided into two stages, namely the stage of collecting experimental data derived from various studies of adsorption of heavy metal ions by various biosorbents and the processing of comparative data models. Proponents of the EMZHA model have reported the reliability of the prediction of this model for the absorption of several metal ions but only use one type of biosorbent, namely the skin of the roof, while this study uses 11 different biosorbents. In this study successfully proved that the EMZHA model has an average determination coefficient of 0.9034 which is higher than the average coefficient of determination of the Langmuir model (0.8485) and Freundlich (0.8483).
The Influence of Solution Concentration and pH for Removal Indigo Carmine using Banana Stem as a Biosorbent Rahmiana Zein; Yuliana Arianti; Emriadi Emriadi; Putri Ramadhani; Syiffa Fauzia
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 6 (2023): December 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i6.9844

Abstract

The textile industry is one sector that generates effluent containing a significant quantity of pollutants, including dyes, and thus has an effect on the environment. Synthetic dyes, which are toxic and difficult to degrade, are utilized extensively in the textile industry. Therefore, a new study utilizes banana stems as a cost-effective biosorbent to remove indigo carmine dye. This research aims to investigate the use of banana stem waste as a bisorobent in batch method to adsorption indigo carmine dye. The optimal concentration and pH values are 2 and 900 mg/L, respectively. The interaction between the indigo carmine dye and the banana stems is suggested by the FTIR analysis.  The solution's indigo carmine dye may be adsorbed by banana stem.
Asam sitrat sebagai pemodifikasi biosorben kulit pisang kepok (Musa balbisiana Colla) untuk meningkatan daya serap ion logam Cd2+ Chessia Nodifa Putri; Rahmiana Zein; Deswati Deswati; Sofyan Sofyan
Jurnal Litbang Industri Vol 13, No 2 (2023)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24960/jli.v13i2.8412.169-177

Abstract

Limbah menjadi hal yang sangat penting, karena jika tidak diolah dengan baik maka akan berdampak buruk bagi perairan dan lingkungan. Logam kadmium (Cd) merupakan logam berat yang berasal dari industri tambang dan industri permesinan yang dapat menyebabkan kerusakan pada tubuh. Untuk mengatasi permasalahan ini, dilakukan metode biosorpsi yaitu penyerapan logam dengan menggunakan bahan alam (non living cell). Biosorben yang digunakan adalah Kulit Pisang Kepok dan dimodifikasi dengan Asam Sitrat untuk meningkatkan kapasitas daya serap terhadap ion logam Cd2+. Kondisi optimum serapan yang didapatkan dari kulit pisang kepok yaitu pH 6, konsentrasi 250 mg/L, waktu kontak 75 menit, dan kecepatan pengadukan 100 rpm dengan kapasitas adosrpsi 13,025 mg/g, dan untuk optimum serapan dari kulit pisang kepok yang dimodifikasi dengan asam sitrat yaitu pH 6, konsentrasi 400 mg/L, waktu kontak 60 menit, dan kecepatan pengadukan 200 rpm dengan kapasitas adsorpsi 37,756 mg/g. Intrumen yang digunakan untuk melihat pengaruh yang terjadi yaitu Fourier Transform Infra-Red (FTIR), dan Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX).
Co-Authors -, Raisha Mashelina -, Yefrida Abdi Dharma Adewirli Putra Admi Admi Admi Admi Afriani, Dian Rizky Agung Abadi Kiswandono Aiwa Putra, Zaki Arianti, Yuliana Armaini - Chessia Nodifa Putri Deliza, Deliza Deswati Deswati Deswati Dheasy Gustira Dheasy Gustira Dwi Syukur Phameswari Edison Munaf Edison Munaf Edison Munaf Edison Munaf Elida Mardiah Emil Salim Emriadi - Fauzia, Syiffa Fitri Mairizki Fivi Mona Bareno Girsang, Ermi Hamdhan Fathony Harza Dipajana Umardi Harza Dipajana Umardi Hasanah, Qomariah Hermansyah Aziz Hermansyah Aziz Hevira, Linda Ilahi, Fitratul Imelda Imelda Imelda Imelda Imran Nazar Indrawati - Indrawati Indrawati Jihanul Khaira Jihanul Khaira Lee Wah Lim Linda Hevira Linda Hevira Marliani, Indah Tika Matlal Fajri Alif Mayaserli, Dyna Putri Megita Febiola Mutiara Suciandica Neneng Swesty Nofita, Dewi Norman Ferdinal Novesar Jamarun Novsimapera, Gatri Nurul Afifah Nurul Annisyah Prestica, Yona Putri Ramadhani Putri Ramadhani Putri Ramadhani Putri Ramadhani, Putri Putri, Reza Audina Qomariah Hasanah Raihan Hanif Aulia Refilda Refilda Refinel - Risa Oktaviani Riza Nurafni Safni Safni Salsa Nurul Fadhilah Sofyan Sofyan Suci Wulandari Sumaryati Syukur Suryati Suryati Swesty, Neneng Syafrizayanti Syafrizayanti Syiffa Fauzia Syiffa Fauzia Syiffa Fauzia Syukri Syukri Teti Nurhayatul Rahmi Tio Putra Wendari Tommi Hermansyah Toyohide Takeuchi Upita Septiani Upita Septiani Wellia, Diana Vanda Wilda Putri Suhada Wilda Putri Suhada Yefrida Yefrida Yetria Rilda Yuliana Arianti Yulizar Yusuf Yunazar Manjang Yunazar Manjang Zilfa Zilfa Zilfa, Z. Zulfi Zulfi Zulkarnain Chaidir