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All Journal Sains Natural: Journal of Biology and Chemistry Jurnal Kimia Unand
Vivi Sisca
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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Isothermic Adsorption Study of Nitrate Ion Adsorption in Bioethanol Waste Using Quaternary Ammonium Polymer Amrillah, Nafira Alfi Zaini; Rahayu, Aster; Dhias Cahya Hakika; Vivi Sisca; Veranica; Firda Mahira Alfiata Chusna; Lia Anggresani; Lee Wah Lim
Sains Natural: Journal of Biology and Chemistry Vol. 15 No. 1 (2025): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v15i1.770

Abstract

The global shift towards renewable energy sources has led to a significant increase in bioethanol production, particularly from sugar mills. Despite being an environmentally friendly alternative to fossil fuels, bioethanol production produces large amounts of waste containing dangerous contaminants such as nitrate ions (NO₃⁻). These contaminants pose severe environmental and health risks, including water pollution and eutrophication. This study explores the use of ammonium polymer as an adsorbent and the influence of pH in the adsorption process as a promising technique for removing nitrate ions from bioethanol waste. Based on the analysis that has been carried out, the optimal pH for adsorption of nitrate ions is around 9, where the removal efficiency (%RE) reaches 98.43% and the adsorption capacity (Qe) is 24.86 mg/g. These experiments show that the Freundlich model, with a heterogeneity factor (n) of 1.0947 and a Freundlich constant (KF) of 1.92 x 10³ units, provides the best fit to the adsorption data, indicating a heterogeneous adsorption process with a strong affinity for nitrate ions.
Modifikasi Keramik Kerajinan Rakyat dengan Penambahan CaSO4, Pasir Besi, Abu Sekam Padi, dan Batu Kapur Zilfa, Z.; Vivi Sisca
Jurnal Kimia Unand Vol. 12 No. 1 (2023): May 2023
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.12.1.19-25.2023

Abstract

One of the ceramic home industries is ceramic making in Galogadang Batusangkar. This home industry uses the basic ingredients of clay mixed with water and then molded and burned, so the resulting ceramic products are less than perfect, hard, and brittle. According to the matter above, we wish to try to look for methods and modify the ceramics home industry by adding some clay that turns yellow and white, sulfate calcium (CaSO4), limestone, iron sand, and chaff ash. The process of ceramic consists of three phases that are pressing powder, drying, and burning. The analysis carried out is the compressive strength test, and SEM (Scanning Electron Microscopy) aims to observe the uniformity of the mixture of the ceramic. XRD (X-Ray Diffraction) determination was done to determine the crystal structure. The component analysis was measured with XRF (X-Ray fluorescence). From the research result, white clay is nicely made by ceramic materials if mixed with sulfate calcium (CaSO4), limestone, iron sand, and chaff ash.
Co-Authors Amrillah, Nafira Alfi Zaini Dhias Cahya Hakika Firda Mahira Alfiata Chusna Lee Wah Lim Lia Anggresani Rahayu, Aster Veranica Zilfa, Z.