Adsorption efficiency of biochar produced by aquaculture by-products for removing geosmin in aquaculture environment

IF 4.3 4区环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL

Water Reuse Pub Date : 2023-12-12 DOI:10.2166/wrd.2023.129

Yadi Cui, Xi Chen, Chompoonuch Pitakrattanawong, Xiaolu Du, Liping Qiu, Huimin Xu, Jiazhang Chen, Shunlong Meng, Limin Fan, Chao Song

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Abstract

Aquaculture produces numerous by-products like aquatic plants, algae, and nutrient-enriched sediment annually, which are often discarded as waste, are not environmentally friendly, and are harmful to the environment. In this study, aquaculture by-products were utilized to prepare moss biochar at 500, 700, and 800 °C (BC500, BC700, and BC800, respectively); Elodea biochar (WBC800) at 800 °C; and sediment biochar (SBC800) at 800 °C. Characterization and experimental results showed that BC800 had the best adsorption effect on geosmin (GSM) under the same conditions; when using BC800 to treat GSM solution with a pH of 7, the adsorption efficiency of GSM was high (97.08%) under the conditions of dosage of 1.0 g, temperature of 25 °C, and adsorption time of 2 min. Adsorption is a multimolecular layer process that involves both physical aspects of porous adsorption and connections between chemical bonds. Biochar, derived from aquaculture by-products, is utilized to eliminate odorous substances in aquaculture environments, thereby promoting resource recycling.

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利用水产养殖副产品生产的生物炭在去除水产养殖环境中的地奥司明中的吸附效率

水产养殖每年会产生大量副产品，如水生植物、藻类和营养丰富的沉积物，这些副产品通常被作为废物丢弃，不环保，对环境有害。本研究利用水产养殖副产品制备了温度分别为 500、700 和 800 ℃ 的苔藓生物炭（BC500、BC700 和 BC800）、温度为 800 ℃ 的裙带菜生物炭（WBC800）和温度为 800 ℃ 的沉积物生物炭（SBC800）。表征和实验结果表明，在相同条件下，BC800 对地黄素（GSM）的吸附效果最好；用 BC800 处理 pH 值为 7 的地黄素溶液时，在用量为 1.0 克、温度为 25 ℃、吸附时间为 2 分钟的条件下，地黄素的吸附效率很高（97.08%）。吸附是一个多分子层过程，涉及多孔吸附的物理方面和化学键之间的联系。生物炭取自水产养殖副产品，可用于消除水产养殖环境中的异味物质，从而促进资源循环利用。

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