摘要
选择长江三角地区具有代表性的四种母质发育而成的土壤为供试土壤,外源加入锌培育污染土样,通过解吸实验及上清夜的测定完成不同浓度柠檬酸对土壤解吸锌的影响。结果表明:柠檬酸的加入能够明显促进土壤中锌的解吸;在相同柠檬酸浓度下,随着污染土样锌含量的递增,柠檬酸对锌的解吸量呈递增趋势;在相同锌污染程度的情况下,随着柠檬酸浓度的增加,解吸量呈增长趋势;相同污染程度,相同的柠檬酸浓度下,铜锌相比较,铜的解吸量更大;四种土壤相比较,柠檬酸对锌的解吸量顺序为沟沟堆积物母质土壤>湖相沉积物母质土壤>河相沉积物母质土壤>海相沉积物母质土壤。
The soils for the experiment were four kinds of typical soils formed by different parent materials in Yangtze River delta. The soils were polluted by zinc firstly, and then desorbed by citric acid. The experiments include the desorption and the determination of the clear solution and accomplishment of the desorption of copper by citric acid in the different parent material soils finally. The results revealed that the citric acid could promote the desorption of zinc apparently and the desorption of zinc in polluted soil enhanced with the rise of citric acid concentration and the amount of copper. Copper was desorbed easier than zinc. For different parent material soils the desorption of copper by citric acid followed the order： deposit〉lake sediment〉river sediment〉sea sediment.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第5期1049-1052,共4页
Chinese Journal of Soil Science
基金
国家重点基础研究发展计划(973计划)资助项目(2002CB410810)
关键词
柠檬酸
解吸
锌
土壤母质
Citric acid
Desorption
Zinc
Parent material
