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All Journal Sainteknol : Jurnal Sains dan Teknologi Chemistry Indonesian Journal of Chemical Research
Irsyada, Muhamad Zakky
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Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Engineering Environmental Science

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Utilization of Nutgrass (Cyperus Rotundus L.) as a Phytoremediator in Reducing BOD and COD Levels of Batik Liquid Waste Using Constructed Wetlands in Sub-Surface Flow Type Irsyada, Muhamad Zakky; Fauziyyah, Hasna Amalia; Sari, Ayuk Permata
Sainteknol : Jurnal Sains dan Teknologi Vol 21, No 2 (2023): December 2023
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v21i2.49818

Abstract

The process of dyeing batik fabric is a significant source of water pollution due to synthetic dyes. Only 5% of this compound is used, while 95% will be disposed of as waste. This compound is relatively stable, so it is tough to degrade in nature and is dangerous for the environment because it can cause effects such as increasing COD (Chemical Oxygen Demand) and BOD (Biological Oxygen Demand). Constructed wetlands in sub-surface flow type is a wastewater treatment method that utilizes the role of plants and microorganisms found in the plant root area or rhizosphere. Nutgrass (Cyperus Rotundus L.) is rarely used and is considered a weed that causes harm to surrounding plants. On the other hand, nutgrass is a plant with good remediation and straightforward maintenance. In this research, the nutgrass plant was used as a phytoremediator with planting media in the form of sand and gravel to improve the performance of constructed wetlands in processing liquid batik waste. Based on the analysis of BOD and COD test parameters, the results showed that nutgrass could reduce BOD levels by up to 75% and COD levels by 73% so that wastewater produced from artificial wetlands flows more safely and can be used for irrigation and plants sanitation.
Understanding the Impact of Curing Duration on Characteristics of Durian Extract-Based Solid Soap Imani, Nadya Alfa Cahaya; Pribadi, Meidwiarta Cahya; Irsyada, Muhamad Zakky; Kusumaningrum, Maharani; Asri, Sarwi; Ardhiansyah, Hanif
Indonesian Journal of Chemical Research Vol 13 No 1 (2025): Edition for May 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.13-nad

Abstract

This study aims to understand the effect of curing duration on the characteristics of durian extract-based solid soap. Durian extract-based soap has unique properties that can be affected by the curing process, namely the duration of drying and maturation of the soap after manufacture. In this study, soap was produced using durian extract as the main ingredient, with curing time variations ranging from 2 weeks to 6 weeks. During the curing process, the water content in the soap decreased, and the saponification reaction between alkali and free fatty acids from durian extract took place further. The characteristics of the soap analyzed included hardness, pH, free fatty acid content, and foam durability and quality. The results showed that the soap became more challenging as the curing time increased, with a more stable pH and lower free fatty acid content. In addition, the durability of the soap increased, and the foam quality became more optimal. Longer curing durations were also associated with increased stability and safety of the resulting soap. This study provides new insights into the development of durian extract-based soap. It can be used as a reference to improve the quality of natural soap products through proper curing process management.
Co-Authors Ardhiansyah, Hanif Asri, Sarwi Fauziyyah, Hasna Amalia Imani, Nadya Alfa Cahaya Maharani Kusumaningrum Pribadi, Meidwiarta Cahya Sari, Ayuk Permata