Application and evaluation of biochar/attapulgite composites for controlling nitrogen pollution and ecological response in a small lentic system: Implications water/sediment quality management in standing water bodies

文献类型： 外文期刊

第一作者： Huang, Xiaoli

作者： Huang, Xiaoli;Zhou, Wenjing;Cui, Kanli;Huo, Tangbin;Geng, Longwu;Xu, Wei;Huang, Xiaoli;Liu, Shouxin;Huang, Xiaoli;Huo, Tangbin;Zhou, Wenjing;Hu, Qi;Cui, Kanli;Hao, Qirui;Zhao, Xinyue;Wang, Yumei

作者机构：

关键词： Biochar-attapulgite composite; Ammonia nitrogen; Water quality; Plankton; Microbial community structure; Pond restoration

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2025 年 13 卷 3 期

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收录情况： SCI

摘要： Controlling the release of nitrogen from sediment is a crucial strategy for mitigating nitrogen levels in aquatic environments. This study evaluated the effects of a composite material consisting of biochar and attapulgite during a seven-month experimental period as a sediment cover under large-scale outdoor conditions. Three groups (a control group (B-Pond), a low-dose group (L-Pond), and a high-dose group (H-Pond)) were assessed overlying water quality, nitrogen in sediment, plankton community shifts, and microbial community dynamics. The results showed that BC-ATP coverage effectively reduced nitrogen release from the sediment. Compared with the control group, ammonia and total nitrogen concentrations in water of H-Pond after the experiment, decreased by 45.81 % and 17.87 %, respectively. Ammonia-nitrogen concentrations in the sediment of H-Pond were generally lower than those of the other two ponds throughout the aquaculture period. Especially in August, ammonia nitrogen in the sediment of H-Pond decreased by 129.95 % compared to B-Pond. These materials greatly improved the various diversity indices of the phytoplankton community. The mean Shannon-Wiener, Pielou, and Margalef indices for H-Pond were 3.47, 0.52, and 6.08, respectively. The means of these indices for B-Pond were 3.03, 0.47, and 5.41, respectively. It also promoted the growth of microorganisms associated with denitrification, notably Dechloromonas and Steroidobacteraceae, in the sediment surface layer, enhancing nitrogen removal. These microbes exhibited positive correlations with one another, playing a key role in maintaining community stability. The findings suggest that BC-ATP can effectively mitigate nitrogen pollution in sediment, providing valuable insights and potential solutions for optimizing water environments.

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