Removal and Photodegradation of Metolachlor Herbicide Using Polyelectrolyte Multilayer Membranes

IF 0.5 4区化学 Q4 CHEMISTRY, ANALYTICAL

Journal of Water Chemistry and Technology Pub Date : 2023-11-16 DOI:10.3103/S1063455X23060036

P. Nikhil Chandra

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Abstract

The study illustrates the use of polyelectrolyte multilayer (PEM) membranes prepared with weak/strong polyelectrolyte combination of poly(ethyleneimine)/chondroitin sulfate A (PEI/CS) for the removal of metolachlor (MTR) from water samples. The proposed PEM membranes were characterized by chemical, physical, thermal, and morphological properties. The removal of MTR herbicide by PEI/CS multilayer deposited on a microfiltration polyamide membrane was found to be efficient with a retention rate of about 96.46% for 8 bilayers sat an excellent permeate flux of 6.27 m³/m² day. The photodegradation of metolachlor which got trapped in PEMs in the presence of riboflavin (Rb) sensitizer was investigated at various concentrations. A comparative study on photo-elimination of MTR without the presence of Rb was also done. The degradation time was greatly shortened from more than 1 h for direct photolysis to 5–15 min depending on the initial concentration of the sensitizer. The degradation of metolachlor in the presence of Rb as well as direct photolysis was also experimentally studied.

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聚电解质多层膜去除及光降解甲草胺除草剂

研究了用聚(乙烯亚胺)/硫酸软骨素A (PEI/CS)弱/强聚电解质组合制备的聚电解质多层膜(PEM)去除水样中的异丙甲草胺(MTR)。所制备的PEM膜具有化学、物理、热学和形态学特征。在聚酰胺微滤膜上沉积PEI/CS多层膜对MTR除草剂的去除率为96.46%，8层膜的渗透通量为6.27 m3/m2 d。研究了不同浓度核黄素(Rb)敏化剂存在下，PEMs中捕获的异甲草胺的光降解情况。并对不含Rb的光消除MTR进行了比较研究。根据初始敏化剂浓度的不同，降解时间从直接光解的1小时以上大大缩短到5-15分钟。实验研究了异丙甲草胺在Rb存在下的降解及直接光解反应。

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来源期刊

Journal of Water Chemistry and Technology CHEMISTRY, APPLIED-CHEMISTRY, ANALYTICAL

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Water Chemistry and Technology focuses on water and wastewater treatment, water pollution monitoring, water purification, and similar topics. The journal publishes original scientific theoretical and experimental articles in the following sections: new developments in the science of water; theoretical principles of water treatment and technology; physical chemistry of water treatment processes; analytical water chemistry; analysis of natural and waste waters; water treatment technology and demineralization of water; biological methods of water treatment; and also solicited critical reviews summarizing the latest findings. The journal welcomes manuscripts from all countries in the English or Ukrainian language. All manuscripts are peer-reviewed.