不同添加剂对土壤中乙草胺吸附/解吸的影响

采用批处理恒温振荡法,利用气相色谱-质谱联用仪研究了人工添加不同吸附物质对土壤中乙草胺的吸附/解吸作用.结果表明,人工添加不同吸附物质对土壤中乙草胺的吸附强度和吸附容量不同,不同的添加剂对土壤中乙草胺的吸附懈吸作用均呈现明显的非线性关系,可用Freundlich模型描述.并且随着土壤中添加剂量的增大,吸附强度增大、吸附容量增大、所得吸附等温线的非线性也逐步增大;另外,添加剂对乙草胺的解吸迟滞作用也随添加剂含量的增高而更加明显.但是不同添加剂对土壤中乙草胺的吸附能力有明显差异,其中煤粉的吸附能力最大,其次是壳聚糖,沸石最小.

Impact of Different Addtives on the Sorption and Desorption Behavior of Acetochlor in Soil

Acetochlor is the biggest area herbicides application in China. Because of the drought condition of soil, high dosage of acetochlor is used for enhancing the effective control weed in crop. Sometimes the crops are damaged and soils are polluted by herbicide. Sorption of acetochlor in soil is influenced by soil environment, and the additive can obviously adsorb the herbicide of soil, then ease the harming from the herbicide and the pollution of soil environment. This paper researched adsorption and desorptio...