pH值对土壤吸附二氯喹啉酸的影响研究
|
摘要
采用间歇平衡震荡法研究pH值对二氯喹啉酸在红土、黑土、潮土三种供试土壤中吸附特征。结果表明:二氯喹啉酸在不同土壤中的吸附特征存在差异,土壤的pH值影响二氯喹啉酸的吸附特征,当pH值趋近于二氯喹啉酸的pKa(4.35)时,容易被土壤吸附;pH值在较高情况下(pH=7.4),二氯喹啉酸大多呈离子状态,不易被土壤吸附;有机质含量降低将导致土壤对二氯喹啉酸的吸附能力下降。
The paper uses the intermission, equilibrium and shaking process to explore the pH value on the adsorption characteristics of dichlor-quinolinic acid in different soils, namely red earth, black earth and tide(fluvo-aquic) soil, respectively. The result shows that the adsorption characteristics of dichloro-quinolinic acid in different soils have differences, and the pH values in the soils affect the adsorption characteristics of dichloro-quinolinic acid. When the pH value tends towards pKa(4.35) of dichloro-quinolinic acid, the dichloro-quinolinic acid is easily absorbed by the soils. When pH value is under the higher instance(pH=7.4), the dichloro-quinolinic acid assumes the ion estate and can hardly be absorbed by the soils; Meantime, the reduction of the organic matter content will lead to decline the adsorption capability of the soils upon the dichloro-quinolinic acid.
The paper uses the intermission, equilibrium and shaking process to explore the pH value on the adsorption characteristics of dichlor-quinolinic acid in different soils, namely red earth, black earth and tide(fluvo-aquic) soil, respectively. The result shows that the adsorption characteristics of dichloro-quinolinic acid in different soils have differences, and the pH values in the soils affect the adsorption characteristics of dichloro-quinolinic acid. When the pH value tends towards pKa(4.35) of dichloro-quinolinic acid, the dichloro-quinolinic acid is easily absorbed by the soils. When pH value is under the higher instance(pH=7.4), the dichloro-quinolinic acid assumes the ion estate and can hardly be absorbed by the soils; Meantime, the reduction of the organic matter content will lead to decline the adsorption capability of the soils upon the dichloro-quinolinic acid.
引文
[1]中国农药信息网,http://www.chinapesticide.gov.cn/service/zhcx/yxcfxxcx.asp. Chinapesticideinformationnetwork, http://www.chinapesticide. gov.cn/service/zhcx/yxcfxxcx.asp.
[2]张倩,郭伟,宋超,等.二氯喹啉酸在不同土壤中的降解规律及其影响因子[J].中国烟草科学, 2013-12,34(6):83-88.
[3]杨丽华,龚道新.二氯喹啉酸在几种矿物和土壤中的吸-解吸及机理研究[D].湖南:湖南农业大学,2014.
[4]李欣.二氯喹琳酸在烟地中的残留降解吸附及烟地和烟叶中的效应研究[D].湖南:湖南农业大学,2016.
[5]杨丽华,龚道新,周健,袁雅洁,肖浩,等.低分子量有机酸对二氯喹啉酸在土壤中吸附解吸的影响[J].农药学学报,2015,17(2):185-194.
[6]郑立庆,方娜,周庆祥,等.农药在土壤中的吸附及其影响因素[J].化工技术与开发,2004,33(1):12-15.
[2]张倩,郭伟,宋超,等.二氯喹啉酸在不同土壤中的降解规律及其影响因子[J].中国烟草科学, 2013-12,34(6):83-88.
[3]杨丽华,龚道新.二氯喹啉酸在几种矿物和土壤中的吸-解吸及机理研究[D].湖南:湖南农业大学,2014.
[4]李欣.二氯喹琳酸在烟地中的残留降解吸附及烟地和烟叶中的效应研究[D].湖南:湖南农业大学,2016.
[5]杨丽华,龚道新,周健,袁雅洁,肖浩,等.低分子量有机酸对二氯喹啉酸在土壤中吸附解吸的影响[J].农药学学报,2015,17(2):185-194.
[6]郑立庆,方娜,周庆祥,等.农药在土壤中的吸附及其影响因素[J].化工技术与开发,2004,33(1):12-15.