不同有机酸对重金属镉形态及生物有效性的影响  

The Effect of Different Organic Acids on Existing forms and Bioavailability of Cadmium

作　　者：乔冬梅[1,2] 樊向阳[1,2] 齐学斌[1] 高青[1,2] 樊涛[1,2] 葛亚明[3] 安志兴[3] 

机构地区：[1]中国农业科学院农田灌溉研究所,河南新乡453002 [2]中国农业科学院河南新乡农业水土环境野外科学观测试验站,河南新乡453002 [3]河南科技学院动物科学学院,河南新乡453003

出　　处：《灌溉排水学报》2012年第6期15-17,31,共4页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(50809074);国家863计划课题(2012AA101404)

摘　　要：为了探求根系分泌有机酸对重金属Cd2+存在形态及生物有效性的影响,研究了不同质量摩尔浓度酒石酸、草酸、苹果酸、柠檬酸、乙酸和EDTA对重金属Cd2+各个形态的影响。研究得出,EDTA最有利于重金属Cd2+活性的增强,其次为柠檬酸和乙酸,苹果酸的效果最差。质量摩尔浓度为1、3mmol/kg的乙酸和柠檬酸以及5、6、7mmol/kg的EDTA最有利于重金属Cd2+生物有效性系数的提高。In order to reveal the effect of the exudation of organic acids by root on e availability of Cd^2＋ , the effects of tartaric acid, oxalic acid, malie acid, citric acid, of different concentrations on existing forms of Cd^2＋ were studied. The results show most beneficial to enhance the activity of Cd^2＋ , and citric acid and acetic acid came malic acid was the worst. When the concentrations of acetic acid and citric acid mmol/kg, and the concentrations of EDTA were five, six and seven mmol/kg, the b improved. xisting forms and bioacetic acid and EDTA ed that EDTA was the secon were d, and effect of one, and three ioavailability would beimproved.

关 键 词：有机酸 Cd2+ 存在形态 生物有效性 

分 类 号：X53[环境科学与工程—环境工程]