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All Journal Jurnal Kimia Riset ALKIMIA : Jurnal Ilmu Kimia dan Terapan
Muhamad Iqbal, Rendy
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Social Sciences

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Eco-friendly Removal of Methylene Blue Using Alginate-Activated Natural Clay Composite Rasidah, Rasidah; Jumiati, Jumiati; Nugroho, Wahyu; Agnestisia, Retno; Karelius, Karelius; Alfanaar, Rokiy; Muhamad Iqbal, Rendy
ALKIMIA Vol 7 No 1 (2023): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/591htf60

Abstract

Methylene blue is a poisonous, persistent, and non-biodegradable dye frequently found in textile industry wastewater that significantly influences the emergence of various environmental and health problems. Therefore, precautions must be taken to reduce the amount of methylene blue in the wastewater. Compositing clay into alginate produces an eco-friendly adsorbent, alginate-activated clay composite beads (Ag-AC 1-5%), successfully removing methylene blue. XRD and FTIR spectroscopy characterization results show that illite, a family of 2:1 clay minerals, is a primary constituent of activated clay. However, FTIR spectroscopy shows that alginate has mannuronic acid residue characteristics. Several batch experiments were carried out to evaluate the effect of the alginate: clay ratio and pH solution on the percentage of methylene blue removal. 
A Novel Cerrena caperata Fungal Membrane: Antibacterial Effect of Deacetylation and Fatty Acid Coating Agnestisia, Retno; Muhamad Iqbal, Rendy
Jurnal Kimia Riset Vol. 10 No. 1 (2025): June
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v10i1.72415

Abstract

Biofouling commonly occurred due to the accumulation of bacteria that blocked membrane pores, especially in fungal-derived membrane technology. Surface modification of Cerrena caperata fungal membrane was carried out in this study to enhance its antibacterial activity, which can be expected to prevent biofouling on the membrane surface. This modification is crucial to ensure the ability of the membrane to inhibit or kill pathogenic bacteria during water purification, ultimately producing safer water in the future. The membrane was synthesized from C. caperata mycelium cultured in potato dextrose broth for 4 weeks. Two modification treatments were applied: 1) deacetylation with 50% NaOH and 2) coating the membrane surface with 1% stearic acid. Both unmodified and modified membranes were characterized using Fourier Transform Infrared Spectroscopy. Antibacterial activity was tested against Escherichia coli, Bacillus cereus, and Staphylococcus aureus. The results showed that the most effective treatment for improving the antibacterial activity of membranes was deacetylation with 50% NaOH for 90 min, it might be caused the structure transformation of chitin to chitosan which have ability for antimicrobial efficacy. This research is expected to highlight the potential of fungi as a natural and sustainable raw material in the production of filtration membranes that are not only effective in water purification but also safer for both the environment and human health.
Co-Authors Alfanaar, Rokiy Jumiati Jumiati Karelius, Karelius Rasidah Rasidah, Rasidah Retno Agnestisia Wahyu Nugroho Yuliana