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All Journal JURNAL KIMIA SAINS DAN APLIKASI
Maya Rahmayanti
Department of Chemistry, Faculty of Science and Technology, Universitas Islam Negeri Sunan Kalijaga Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

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Characterization and Application of Chitosan as a Natural Coagulant in Reducing Remazol Red Dyestuff Concentration and COD Value of Batik Liquid Waste Rifana Adilla Safitri; Maya Rahmayanti
Jurnal Kimia Sains dan Aplikasi Vol 23, No 9 (2020): Volume 23 Issue 9 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (26.79 KB) | DOI: 10.14710/jksa.23.9.333-337

Abstract

Research on chitosan application as a natural coagulant in reducing the concentration of remazol red dye from batik liquid waste has been carried out. This study aims to study the effect of the acidity of batik wastewater on the coagulant ability to reduce the remazol red dye concentration and the COD value of batik liquid waste. In this study, chitosan compounds before and after coagulation were characterized using Fourier Transform Infrared (FTIR) Spectroscopy. The pH range used in the coagulation process was pH 2-6. Post-coagulation chitosan FTIR spectra showed a shift in the wave number in the 3400 cm-1 area, which indicated an interaction between the -OH group of chitosan and the dye remazol red. Remazol red dye was maximally coagulated by chitosan at pH 2. The percentage reduction in the dye concentration reached 100%, and the decrease in COD value at that pH was 71.69%.
Study of Adsorption-Desorption on Batik Industrial Dyes (Naphthol Blue Black) on Magnetite Modified Humic Acid (HA-Fe3O4) Maya Rahmayanti; Erni Yunita; Nunung Faizah Yosi Putri
Jurnal Kimia Sains dan Aplikasi Vol 23, No 7 (2020): Volume 23 Issue 7 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1989.75 KB) | DOI: 10.14710/jksa.23.7.244-248

Abstract

The rapid development of the batik industry can pollute water resources and become an increasingly severe problem. This research studies the adsorption-desorption of naphthol blue-black (one of the dyes in batik liquid waste) by magnetite modified humic acid (HA-Fe3O4). The adsorption isotherm was studied using the Langmuir and Freundlich isotherm models. Meanwhile, desorption agents used in this study were distilled water and hydrochloric acid. The results show that the adsorption isotherm followed the Langmuir adsorption model with a maximum adsorption capacity of 2.41 mmol/g. Desorption studies show that the desorption efficiency of naphthol blue-black on HA-Fe3O4 is 0.058% and 5.86% in the desorption agent of distilled water and HCl (1 M)
Co-Authors Erni Yunita Nunung Faizah Yosi Putri Rifana Adilla Safitri