改性生物质材料对地表水中残余草甘膦异丙胺盐的吸附  

Adsorption of Residual Pesticide Glyphosate Isopropylamine in Surface Water byModified Biomass Materials

作　　者：周玥 李艳 王晓东[1] 王慧 薛冰纯[1] ZHOU Yue;LI Yan;WANG Xiao-dong;WANG Hui;XUE Bing-chun(College of Chemistry and Materials Science,Shanxi Normal University,Taiyuan 030031,China)

机构地区：[1]山西师范大学化学与材料科学学院,太原030031

出　　处：《环境科学》2024年第6期3234-3246,共13页Environmental Science

基　　金：水资源协同创新中心项目(0401/01050001)。

摘　　要：有效处理农药残留引起的水环境污染问题是提升河湖水质的关键.采用浸渍法将Fe和Al双金属复合至花生壳粉末,成功制备改性生物质材料(Fe-Al-PS),用于吸附水环境中残留的草甘膦异丙胺盐除草剂.Fe-Al-PS对10 mg·L^(-1)的草甘膦异丙胺盐在吸附剂用量和吸附时间分别为0.14 g和10 min时达到吸附平衡,去除率分别稳定在99.9%和99.6%.吸附过程遵循伪二级动力学和Freundlich吸附等温模型,属于多分子层化学吸附.Fe-Al-PS在较宽的p H(2~11)范围内对草甘膦异丙胺盐的去除率均大于95%.热力学结果表明吸附是自发的放热过程.Fe-Al-PS材料易得、合成简便且能耗低,具有较高的抗干扰能力和可重复利用性,不仅可用于实际水体中草甘膦异丙胺盐除草剂的有效去除,还可用于无机磷的去除.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.

关 键 词：生物质 浸渍法 草甘膦异丙胺盐(GIS) 掺杂改性 吸附 水质处理 

分 类 号：X131.2[环境科学与工程—环境科学]