摘要
研究了吡虫啉在土壤中的吸附及作用机理.结果表明,吡虫啉在土壤中的吸附主要归结于土壤有机质对它的结合,其它因素影响较小,Freundlich常数Kf与OM(%)有较好的相关性(r=0993);吡虫啉能与腐殖酸作用发生电荷转移,并能与腐殖酸羟基形成氢键.
The adsorption of imidacloprid in soils was investigated.Adsorption was found to be correlated with organic matter in soil and the Freundlich constant Kf=1.69+1.66× [OM](r2 =0 993) .The results of IR analysis showed the formation of hydrogen bonds and the results of ESR suggested the existence of electricity donor acceptor mechanism between imidacloprid and humicacid.
出处
《环境科学学报》
CAS
CSCD
北大核心
2000年第2期198-201,共4页
Acta Scientiae Circumstantiae
基金
国家自然科学重点基金!项目 (编号为 3 9670 4 2 0 )
关键词
吡虫啉
土壤
腐殖酸
土壤监测
imidacloprid
soils
humicacid
adsorption
mechanism
