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All Journal VALENSI 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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THE EFFECT OF CONTACT TIME AND BIOSORBENT TEMPERATURE ON THE ADSORPTION OF INDIGO CARMINE DYES IN KAPOK HUSK BIOSORBENT MODIFIED WITH SNAIL MEAT AND KINETIC STUDY Rahmiana Zein; -, Raisha Mashelina
ALOTROP Vol. 7 No. 2 (2023): Alotrop 2023
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v7i2.30804

Abstract

The use of indigo carmine dye in the textile industry is a source of pollution for the environment. The presence of dye pollutants in the environment can threaten the health of living creatures and the sustainability of the ecosystem. This research uses kapok husk biosorbent modified with snail meat. Previously, research on adsorption was carried out on metals and cationic dyes from kapok husk, then in this research adsorption was carried out using the batch method to adsorb anionic dyes. The biosorbent modification process using snail meat aims to add active sites in the form of functional groups to the biosorbent to optimize the dye adsorption capacity. The contact objective of this research is to determine the heating time and temperature conditions for optimal adsorption of indigo carmine using the batch method. The research results showed that the adsorption capacity was at optimum conditions for the adsorption of indigo carmine at a contact time of 60 minutes and a temperature of 25°C.
Potensi Biosorben Kulit Batang Sagu (Metroxylon sago) untuk Penyerapan Zat Warna Crystal Violet: Studi Isoterm, Kinetika, Termodinamika, dan Aplikasi Zein, Rahmiana; Marliani, Indah Tika; Emriadi, Emriadi; Ramadhani, Putri; Fauzia, Syiffa
Journal of The Indonesian Society of Integrated Chemistry Vol. 15 No. 2 (2023): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v15i2.29245

Abstract

[The Potential of Sago Bark (Metroxylon sago) as Biosorbent for Adsorption of Crystal Violet Dye: Isotherm, Kinetic, Thermodynamic Studies and Its Application] Penelitian bertujuan untuk memanfaatkan limbah kulit batang sagu (Metroxylon sago) sebagai biosorben yang berbiaya rendah untuk penyerapan zat warna crystal violet. Metoda adsorpsi dengan sistem batch digunakan dalam proses optimasi dengan parameter yaitu pengaruh pH, kosentrasi awal, waktu kontak dan suhu pemanasan biosorben. Kondisi optimum diperoleh pada pH 7, konsentrasi awal 900 mg/L, waktu kontak 45 menit, dan suhu pemanasan biosorben 25°C dengan kapasitas adsorpsi sebesar 72,57 mg/g. Proses adsorpsi mengikuti model isoterm Langmuir (R2 = 0,9985) dan model kinetika orde dua semu dengan R2 = 0,9890. Studi termodinamika menunjukkan bahwa proses adsorpsiberlangsung secara spontan dan eksotermik. Siklus adsorpsi-desorpsi menggunakan asam asetat 30% didapatkan sebanyak 5 siklus. Hasil penelitian menunjukkan bahwa limbah kulit batang sagu memiliki potensi sebagai adsorben berbiaya murah, ramah lingkungan dan efisiensi yang tinggi. Kata kunci/keyword: Adsorpsi, biosorben, crystal violet, adsorption, biosorbent, crystal violet.
Advancement in Green Synthesis of Titanium Dioxide : Photocatalytic and Larvicidal Activities – A review Deliza, Deliza; Safni, Safni; Zein, Rahmiana; Putri, Reza Audina
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10655

Abstract

Nanotechnology is a fast expanding field with several applications in science, engineering, healthcare, pharmaceutical, and other areas. Nanoparticles (NP) are frequently produced through a variety of physical and chemical methods. Recently, green synthesis technologies that are more simple, sustainable, and cost-effective have been developed. The environmentally friendly/sustainable synthesis of titanium dioxide nanoparticles (TiO2 NPs) has been in great demand in the previous quarter. Bioactive components found in organisms, such as plants, facilitate the processes of bio-reduction and restriction. This review described green synthesis of TiO2 NPs, the photocatalytical uses, and managing the larvicidal activity of disease-spreading mosquitoes. Various natural reducing agents including proteins, enzymes, phytochemicals, and others, are involved in the synthesis of TiO2 NPs. Current research findings and future concerns in a viable platform based on biologically meditated TiO2 nanostructures for industrial applications.
Training on Postharvest Guava Fruit Processing in KWT Jambu Biji, VII Koto Sungai Sariak, Pariaman Yefrida Yefrida; Refilda Refilda; Imelda Imelda; Refinel Refinel; Rahmiana Zein; Safni Safni; Admi Admi; Dheasy Gustira; Jihanul Khaira; Harza Dipajana Umardi
Warta Pengabdian Andalas Vol 31 No 3 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.31.3.510-517.2024

Abstract

Red guava fruit is one type of fruit that quickly changes colour, texture and spoilage. This is of course a problem for farmers. At harvest time, not all of the fruit is marketable. So sometimes farmers just leave the fruit on the tree, because if harvested it will only increase operational costs. The KWT Jambu Biji Bengke Sakato, VII Koto Sungai Sariak, Pariaman is a group of red guava farmers. They tried to find a solution to this problem by discussing with TIM PPM KIMIA UNAND of the Department of Chemistry, FMIPA, Universitas Andalas. Finally it was agreed that the solution was to make products from red guava. The products made in this program are dodol and red guava ice cream. The KWT members and the Tim PPM KIMIA UNAND together made these two types of products. The results obtained, dodol and ice cream made are quite delicious and have an attractive appearance. This product can be an alternative to red guava processing that has economic value.
Utilization of Coffee Peel Waste as Biosorbent for Rhodamine B Dye Removal: Isotherm, Kinetics, and Thermodynamic Studies Zein, Rahmiana; Prestica, Yona; Deswati; Ramadhani, Putri
Indonesian Journal of Environmental Management and Sustainability Vol. 9 No. 1 (2025): March
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2025.9.1.36-45

Abstract

Coffee Peel Waste (CPW) is an abundant and inexpensive material that can be employed as a biosorbent to remove Rhodamine B (RB) dye from wastewater. This research utilized the batch adsorption approach to optimize the parameters of pH, starting concentration of dye and period of contact. At pH 8, 1000 mg/L as the starting concentration and 105 minutes as the contact time, the optimal conditions were established, exhibited an adsorption capacity of 71.8454 mg/g, aligning with the Langmuir isotherm model, wherein mechanism of adsorption demonstrated monolayer adsorption, and was most appropriate for the kinetic model of pseudo-second order. Thermodynamic analysis revealed that the adsorption occurred spontaneously and released heat, confirming its exothermic nature. FTIR characterization identified the functional sites involved in the adsorption mechanism. At the same time, SEM-EDX analysis showed morphological changes and an increase in some aspects after adsorption, confirming the attachment of RB to the surface of the CPW. This study reveals the advantages of CPW as an innovative, efficient and sustainable biosorbent, offering a new solution in wastewater treatment based on agro-industrial waste.
Training on Postharvest Guava Fruit Processing in KWT Jambu Biji, VII Koto Sungai Sariak, Pariaman Yefrida Yefrida; Refilda Refilda; Imelda Imelda; Refinel Refinel; Rahmiana Zein; Safni Safni; Admi Admi; Dheasy Gustira; Jihanul Khaira; Harza Dipajana Umardi
Warta Pengabdian Andalas Vol 31 No 3 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.31.3.510-517.2024

Abstract

Red guava fruit is one type of fruit that quickly changes colour, texture and spoilage. This is of course a problem for farmers. At harvest time, not all of the fruit is marketable. So sometimes farmers just leave the fruit on the tree, because if harvested it will only increase operational costs. The KWT Jambu Biji Bengke Sakato, VII Koto Sungai Sariak, Pariaman is a group of red guava farmers. They tried to find a solution to this problem by discussing with TIM PPM KIMIA UNAND of the Department of Chemistry, FMIPA, Universitas Andalas. Finally it was agreed that the solution was to make products from red guava. The products made in this program are dodol and red guava ice cream. The KWT members and the Tim PPM KIMIA UNAND together made these two types of products. The results obtained, dodol and ice cream made are quite delicious and have an attractive appearance. This product can be an alternative to red guava processing that has economic value.
Overcoming Stunting in Children with VCO-prebiotic as a Nutritional Supplement with Housewives from the DASHAT Program Armaini; Sumaryati Syukur; Rahmiana Zein; Yetria Rilda; Upita Septiani; Tio Putra Wendari
Warta Pengabdian Andalas Vol 32 No 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.32.2.147-158.2025

Abstract

Stunting in children is a chronic malnutrition problem caused by a lack of nutritional intake for a long time, especially in the first 1,000 days of life. The prevalence of stunted children in West Sumatra is 25.2%, and in Padang City it is 19.5%, which shows a high stunting rate in Padang City. The Community service activities empower housewives to produce VCO with prebiotics as a nutritional supplement for stunted children in Bukik Karan Rawang Village, Padang City. Providing VCO supplements that contain good fats, prebiotics, and antioxidants improves children's digestive systems, increases their immunity, prevents them from infectious diseases, and supports the development of their brains and nervous systems. Technology transfer provides skills for mothers of stunted children to make their own VCO, and can also improve the family economy. The growth and development of stunted children improve, as indicated by measurable parameters such as increased height and weight, after they are given VCO with prebiotics. Weight gain between 1-1.8 kg, an average of 1.47 kg, and height between 2.2-7 cm, an average of 4.38 cm in stunted children. Education on diet and Parenting Patterns for stunted children is carried out by providing knowledge, training, nutritional counseling, and parenting to increase insight among mothers of stunted children about nutrition supplements and healthy and nutritious foods to achieve improved health. Providing VCO with prebiotics can enhance children's growth and development and improve their nutritional status to help overcome stunting.
The Impact of Biofloc on Fish Growth Indicators and Health Risks Assesment from Polyethylene Terephthalate Microplastic Contamination Afriani, Dian Rizky; Deswati; Rahmiana Zein
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 26 No. 02 (2025): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol26-iss02/594

Abstract

This study aims to evaluate the effects of biofloc technology on the growth performance of Nile tilapia (Oreochromis niloticus) and to assess potential health risks associated with polyethylene terephthalate (PET) microplastic contamination in aquaculture systems. Three treatments were applied: aquaculture without biofloc and microplastics, aquaculture with biofloc but without microplastics, and aquaculture with biofloc combined with PET microplastics. The novelty of this research lies in the integration of biofloc technology with a quantitative health risk assessment approach aspect that has received limited attention in previous studies. Furthermore, this study specifically utilizes PET microplastics, which differ in physicochemical properties and toxicological potential from the commonly studied polyethylene (PE) microplastics. The results revealed that the best performance was observed in the treatment with biofloc but without microplastics, showing an average body weight (ABW) of 5.478 g/fish, an average daily gain (ADG) of 2.343 g/fish/day, and a specific growth rate (SGR) of 4.208%. In terms of health risk, this treatment also demonstrated low to moderate risk levels, with a Polymer Load Index (PLI) of 2.53, a Potential Health Index (PHI) of 11, and a Potential Ecological Risk Index (PERI) of 10. These findings indicate that biofloc technology is not only effective in enhancing fish growth performance but also contributes to mitigating the adverse impacts of microplastic contamination on fish health and food safety in aquaculture systems.
The Evaluation of Microplastic Reduction in Biofloc Aquaculture for Sustainable Nile Tilapia Cultivation Deswati, Deswati; Zein, Rahmiana; Novsimapera, Gatri; Putra, Adewirli
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 26 No. 03 (2025): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol26-iss03/609

Abstract

Sustainable aquaculture requires environments free from microplastic contamination. However, microplastics are now commonly found in aquatic systems, including fish farms, where they can accumulate in organisms and enter the food chain. This study evaluates the effectiveness of biofloc technology in reducing microplastic levels in water and Nile tilapia (Oreochromis niloticus), using ecological risk indices: Pollution Hazard Index (PHI), Pollution Load Index (PLI), and Potential Ecological Risk Index (PERI). The experiment lasted 50 days with four treatments, including polyethylene (PE) and polyethylene terephthalate (PET) exposure. Microplastic concentrations ranged from 0.12 to 0.33 particles/L, with highest accumulation in the fish esophagus (39.2 ± 6.87 particles/g). Identified polymers included PE, PVC, and PA. Risk indices showed PHI = 166.69, PLI = 1.01–1.66, and PERI = 21.49, indicating medium to high ecological risks. Results show that biofloc effectively reduces microplastic levels, making it a promising solution for sustainable aquaculture. The study highlights the need for better plastic waste management policies and stricter regulation of PVC and PET near farming areas.
Separation of Anions on Polar Stationary Phases in Hydrophilic Interaction Liquid Chromatography Mayaserli, Dyna Putri; Zein, Rahmiana; Refilda, Refilda; Putra, Adewirli; Toyohide Takeuchi
JURNAL KATALISATOR Vol. 9 No. 1 (2024): Jurnal Katalisator Volume 9 No.1, April 2024
Publisher : LLDIKTI X Sumbar, Riau, Jambi, Kepri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62769/katalisator.v9i1.2859

Abstract

The need for the detection of anions and cations in various environmental water samples more rapidly with increasing environmental problems and the time it takes the proper method of analysis, is fast, simple, and can provide an accurate assessment. Hydrophilic Interaction Liquid Chromatography (HILIC) is a highly precise technique for separating polar compounds or hydrophilic compounds. Various places have been making a lot of market columns and columns designed specifically for HILIC. For that to be done selection of the appropriate column to separate compounds primarily for separating anions using polar aminopropyl silica stationary phases, HILIC imidazole, pyridine, and Polar Amide-80. Polar stationary phases are best to separate the anions are aminopropyl silica (NH2-60) because it can separate the anions without adding salt. While Polar pyridine can separate anions at low pH (4.2) using acidic stationary phases and at low pH Polar pyridine can serve as an ion exchanger (ion exchange) Keywords: polar stationary phase, HILIC, ion exchange chromatography
Co-Authors -, Raisha Mashelina Abdi Dharma Adewirli Putra Admi Admi Admi Admi Afriani, Dian Rizky Agung Abadi Kiswandono 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 Putra, Zaki Aiwa 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 Yefrida Yetria Rilda Yuliana Arianti Yulizar Yusuf Yunazar Manjang Yunazar Manjang Zilfa Zilfa Zilfa, Z. Zulfi Zulfi Zulkarnain Chaidir