%0 Journal Article
%A LUO Xi
%A LIN Li
%A LI Qing-yun
%A HU Yan-ping
%T Remediation of Cadmium-contaminated Paddy Soils by   Column Leaching
%D 2017
%R 10.11988/ckyyb.20160231
%J Journal of Yangtze River Scientific Research Institute
%P 24-28
%V 34
%N 6
%X Remediation of cadmium-contaminated paddy soils by  column leaching with ferric  chloride was carried out. The effects of leaching conditions including dry or wet state of soil, concentration and volume of leaching solution, stirring times and leaching time on the removal rate of Cadmium (Cd) were investigated systematically. The distribution of Cd in the soil column was also studied in depth. Results suggest that the remediation effect of dry washing was better than that of wet washing. The increase of concentration and volume of leaching solution, and stirring times as well as leaching time could all result in a limited improvement of the removal rate of Cd. The removal rate of Cd achieved a maximum value of 25.4% when using dry washing with the concentration of leaching solution of 0.05 mol/L, three times of stirring, 2 days of leaching, and 450 mL leaching solution. Under this optimal condition for leaching, nearly 86.7% of the removed Cd existed in pore water, which implies that discharging the pore water efficiently is crucial in the process of leaching remediation for paddy soils.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20160231