化学
壤土
腐植酸
含水量
麦草畏
土壤pH值
环境化学
农学
土壤水分
土壤科学
有机化学
环境科学
杂草防治
生物
工程类
岩土工程
肥料
出处
期刊:EQA - International Journal of Environmental Quality
日期:2018-09-03
卷期号:32: 15-27
标识
DOI:10.6092/issn.2281-4485/8243
摘要
The dissipation kinetics activity of FeTiO2 nanoparticles on benzoic acid class herbicide- dicamba, Imidazolinone class herbicide – imazethapyr, sulfonylurea class herbicide – metsulfuron-methyl and Aryloxyphenoxy-propionate class herbicide - clodinafop-propargyl in loamy sand soil was investigated with effect of pH of soil, moisture content and humic acid content on the decontamination of herbicide in photocatalysis were investigated. The effective concentration of humic acid required for the rapid decontamination of herbicide residues on soil was established by varying the amount of humic acid in the range of 10 to 40 mg/Kg and the effective concentration of humic acid was 10 mg/Kg for dicamba, 30 mg/Kg for metsulfuron-methyl and clodinafop-propargyl and there was no effect on imazethapyr. The effect of pH of soil on the decontamination of herbicide residues in soil was investigated by varying the pH of soil from 4.0 to 9.7 and the rapid degradation was observed in soil of pH 9.7 for dicamba and imazethapyr and for metsulfuron-methyl and clodinafop-propargyl in soil of pH 4 when compare to other pH of soil. The degradation order was pH 4 < pH 6.5 < pH 8.0 < pH 9.7 for dicamba and imazethapyr and for metsulfuron methyl and clodinafop-propargyl was pH 6.5 < pH 8 < pH 9.7 < pH 4. The effect of moisture content on decontamination of herbicide residues in soil was investigated by varying moisture content in soil from 20 to 50 mL/Kg. The effective moisture content for rapid degradation was 50 mL/Kg for for dicamba and imazethapyr and for metsulfuron-methyl and clodinafop-propargyl was 40 mL/Kg.
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