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[改性生物质材料对地表水中残留农药草甘膦异丙胺的吸附]。

花匠小妙招
2024-12-29 07:32

摘要

有效处理农药残留引起的水环境污染是改善江河湖泊水质的关键。通过在花生壳粉末中浸渍铁和铝双金属化合物，成功制备了改性生物质材料（Fe-Al-PS），用于吸附水环境中的草甘膦异丙胺盐除草剂残留。在吸附剂用量和吸附时间分别为 0.14 g 和 10 min 时，Fe-Al-PS 对 10 mg-L-1 的草甘膦异丙胺盐达到吸附平衡，去除率分别稳定在 99.9 % 和 99.6 %。吸附过程遵循假二级动力学模型和 Freundlich 吸附等温线模型，属于多分子层化学吸附。在较宽的 pH 值范围（2-11）内，Fe-Al-PS 对草甘膦异丙胺盐的去除率大于 95%。热力学结果表明，吸附是一个自发的放热过程。Fe-Al-PS材料易得，合成简单，能耗低，抗干扰能力强，可重复使用，不仅可用于有效去除实际水体中的草甘膦异丙胺盐除草剂，还可用于去除无机磷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

[Adsorption of Residual Pesticide Glyphosate Isopropylamine in Surface Water by Modified Biomass Materials].

Effective treatment of pesticide residue-induced pollution in the aqueous environment is the key to improving the water quality of rivers and lakes. Modified biomass material (Fe-Al-PS) was successfully prepared by impregnating Fe and Al bimetallic compounds to peanut shell powder for adsorption of glyphosate isopropylamine salt herbicide residues in aqueous environments. Fe-Al-PS reached adsorption equilibrium for 10 mg·L-1 of glyphosate isopropylamine salt at the adsorbent dosage and adsorption time of 0.14 g and 10 min, respectively, and the removal rates were stabilized at 99.9 % and 99.6 %, respectively. The adsorption process followed the pseudo-secondary kinetic and Freundlich adsorption isotherm models and belonged to multi-molecular layer chemisorption. The removal of glyphosate isopropylamine salt by Fe-Al-PS was greater than 95 % in a wide range of pH (2-11). The thermodynamic results indicated that the adsorption was a spontaneous exothermic process. Fe-Al-PS materials were easy to access and involved simple synthesis and low energy consumption, had high anti-interference ability, were reusable, and could be used not only for the effective removal of glyphosate isopropylamine salt herbicide in real water bodies but also for the removal of inorganic phosphorus.