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Results of experimental studies on the properties of peanut shell-based biosorbent for wastewater treatment in oil and gas refining plant

Bakhodir A. YuldashevMilitary Training Center of the National University of UzbekistanKhusnora B. AbdumalikovaTashkent Institute of Chemical TechnologyAlisher U. AuesbaevKarakhalpak State University named after Berdakh , UzbekistanKhayrulla PulatovTashkent Institute of Chemical TechnologySherzod MenglievTashkent Institute of Chemical TechnologyNargisa IgamkulovaTashkent Institute of Chemical Technology

2025en

Ochiq kirishBronza

ABI

Annotatsiya

The use of biosorbents for wastewater treatment offers a cost-effective alternative to activated charcoal. This study investigates the potential of peanut shells, a by-product of the food industry, as a bioadsorbent. Due to their cellulose network and functional groups, peanut shells exhibit significant adsorption capacity, particularly following chemical modification. The experimental research focused on the preparation and characterization of the bioadsorbent BA-1 from peanut shells, involving washing, drying, grinding, and thermal processing. The BET method revealed a high specific surface area of 8.9704 m2/g, indicating a highly porous structure predominantly composed of micropores and mesopores. Adsorption properties were tested using a static method for treating wastewater from a gas processing plant. Analysis of nitrogen adsorption-desorption isotherms confirmed a heterogeneous pore structure of the material. X-ray fluorescence (XRF) spectra and chemical analyses before and after treatment showed significant reductions in elemental contaminants, including potassium, calcium, iron, zinc, copper, and lead, demonstrating the bioadsorbent's effectiveness. In addition, the treatment substantially reduced sulfates (71%), chlorides (72%), nitrates (53%), nitrites (79%), and water hardness (67%). It also adjusted the pH towards neutrality. Copper ion concentration was reduced by 95%; however, trace amounts of lead ions were detected post-treatment, warranting further investigation. The study confirms the high potential of peanut shell-derived bioadsorbents for wastewater purification, emphasizing their capacity to reduce a broad spectrum of contaminants and support sustainable waste management practices. Further research is recommended to optimize the material’s application in gas storage, catalysis, and separation processes, thereby enhancing its practical utility in industrial settings.

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DOI: 10.18668/ng.2025.06.04

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