文献类型： 外文期刊
第一作者： Liu, Bing
作者： Liu, Bing;Shen, Yuwen;Tan, Deshui;Cheng, Bohan;Lin, Haitao;Xue, Rui;Yao, Qiang;Li, Zongxin;Liu, Bing;Cheng, Bohan;Jiao, Shuying
作者机构：
关键词： Bentonite; Organic carbon fixation; Fulvic acid
期刊名称：APPLIED CLAY SCIENCE （ 影响因子：5.8； 五年影响因子：5.4 ）
ISSN： 0169-1317
年卷期： 2025 年 273 卷
页码：
收录情况： SCI
摘要： Modified bentonite composites (Fe-CTAB modified bentonite) were synthesized by intercalating cetyl trimethyl ammonium bromide (CTAB) into the interlayer spaces of raw bentonite, followed by the embedding of iron oxide. The structural and physicochemical characteristics of the modified bentonite were characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA), and zeta potential measurements. Our findings indicated that the modified bentonite exhibited a larger interlayer distance due to the introduction of CTAB, and the surface charge transitioned from negative to positive. The adsorption capacity of the Fe-CTAB modified bentonite for fulvic acid (FA) in an aqueous solution reached 368.4 mg/g, which was an increase of 2150 % compared to raw bentonite. In soil incubation experiments, the soil organic carbon content exhibited a 32.2 % decline in the FA treatment relative to the Fe-CTAB modified bentonite with FA treatment. The higher soil organic carbon sequestration in the treatment combining FA with Fe-CTAB modified bentonite led to increased biomass of crops.
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