摘要
The desorption test was conducted to evaluate the desorption behavior of Pb(Ⅱ)and Cd(Ⅱ)using citric acid.The influential factors that were considered included initial Pb(Ⅱ),Cd(Ⅱ)contamination levels in soil,concentration of citric acid,reaction time,soil pH value and ionic strength.The test results indicated that the desorption was a rapid reaction(less than 6 h),and the removal percentages of Cd(Ⅱ)and Pb(Ⅱ)increased with the increasing contamination levels,concentration of citric acid and the addition of Na^+,Ca^(2+),Na^+, Cl~– and the chelating of organic ligands.
The desorption test was conducted to evaluate the desorption behavior of Pb（Ⅱ）and Cd（Ⅱ）using citric acid.The influential factors that were considered included initial Pb（Ⅱ）,Cd（Ⅱ）contamination levels in soil,concentration of citric acid,reaction time,soil pH value and ionic strength.The test results indicated that the desorption was a rapid reaction（less than 6 h）,and the removal percentages of Cd（Ⅱ）and Pb（Ⅱ）increased with the increasing contamination levels,concentration of citric acid and the addition of Na^＋,Ca^2＋,Na^＋, Cl^– and the chelating of organic ligands.
基金
Projects(51708377,51678311)supported by the National Natural Science Foundation of China
Project(BK20170339)supported by the Natural Science Foundation of Jiangsu Province,China
Project(2016M591756)supported by the China Postdoctoral Science Foundation
Project(17KJB560008)supported by the Natural Science Fund for Colleges and Universities in Jiangsu Province,China
Project(1601175C)supported by the Jiangsu Planned Projects for Postdoctoral Research Funds,China
Project(2016ZD18)supported by the Jiangsu Provincial Department of Housing and Urban-Rural Development,China
Project(2016T05)supported by the Jiangsu Provincial Transport Bureau,China
Project(2017A610304)supported by the Natural Science Foundation of Ningbo City,China
Project supported by the Bureau of Housing and Urban-Rural Development of Suzhou,China
