Bactericide adsorption by purple soil modified by decomposed liquid and humic substance from Bischofia javanica

IF 3 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Physics and Chemistry of the Earth Pub Date : 2024-09-16 DOI:10.1016/j.pce.2024.103742

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Abstract

To investigate the effect of plant decomposition products on bactericide adsorption, purple soil (P) was modified using different ratios of decomposed liquid (Dl) and humic substance (Hs) from Bischofia javanica. Isothermal adsorption characteristics of fenaminosulf and hymexazol by different Dl- and Hs-modified Ps (Dl-P and Hs–P) were studied using the batch method. The effects of pH, ionic strength, and temperature on bactericides adsorption were analyzed. The adsorption process of fenaminosulf and hymexazol on modified Ps was suitable to be described by the Freundlich model. Meanwhile, the adsorption capacity of two bactericides on Hs-Ps was higher than that on Dl-Ps. Acidic conditions and low temperatures were more favorable for the adsorption of fenaminosulf and hymexazol on modified Ps. The adsorption amount of fenaminosulf increased first and then decreased, but that of hymexazol decreased with the increase in ionic strength. The adsorption process of two bactericides was a spontaneous, exothermic entropy-increasing reaction, and the physical adsorption mechanism mainly controlled the adsorption rate. In conclusion, Dl-Ps and Hs-Ps showed potential environmental remediation applications.

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紫色土壤对杀菌剂的吸附：经腐殖质和蚕豆腐殖质改良的紫色土壤

为了研究植物分解产物对杀菌剂吸附的影响，我们使用不同比例的腐烂液（Dl）和腐殖质（Hs）对紫色土（P）进行了改良。采用间歇法研究了不同的 Dl 和 Hs 改性 Ps（Dl-P 和 Hs-P）对磺胺脒和恶霉灵的等温吸附特性。分析了 pH 值、离子强度和温度对杀菌剂吸附的影响。芬那敏硫酸盐和恶霉灵在改性 Ps 上的吸附过程适合用 Freundlich 模型来描述。同时，两种杀菌剂在 Hs-Ps 上的吸附量高于在 Dl-Ps 上的吸附量。酸性条件和低温更有利于芬那敏和恶霉灵在改性 Ps 上的吸附，芬那敏的吸附量先增加后减少，而恶霉灵的吸附量则随着离子强度的增加而减少。两种杀菌剂的吸附过程是一个自发的、放热的熵增反应，物理吸附机理主要控制了吸附速率。总之，Dl-Ps 和 Hs-Ps 具有潜在的环境修复应用价值。

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来源期刊

Physics and Chemistry of the Earth 地学-地球科学综合

CiteScore

5.40

自引率

2.70%

发文量

176

审稿时长

31.6 weeks

期刊介绍： Physics and Chemistry of the Earth is an international interdisciplinary journal for the rapid publication of collections of refereed communications in separate thematic issues, either stemming from scientific meetings, or, especially compiled for the occasion. There is no restriction on the length of articles published in the journal. Physics and Chemistry of the Earth incorporates the separate Parts A, B and C which existed until the end of 2001. Please note: the Editors are unable to consider submissions that are not invited or linked to a thematic issue. Please do not submit unsolicited papers. The journal covers the following subject areas: -Solid Earth and Geodesy: (geology, geochemistry, tectonophysics, seismology, volcanology, palaeomagnetism and rock magnetism, electromagnetism and potential fields, marine and environmental geosciences as well as geodesy). -Hydrology, Oceans and Atmosphere: (hydrology and water resources research, engineering and management, oceanography and oceanic chemistry, shelf, sea, lake and river sciences, meteorology and atmospheric sciences incl. chemistry as well as climatology and glaciology). -Solar-Terrestrial and Planetary Science: (solar, heliospheric and solar-planetary sciences, geology, geophysics and atmospheric sciences of planets, satellites and small bodies as well as cosmochemistry and exobiology).

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