干旱区绿洲灌漠土和灰钙土Cu,Ni的吸附解吸特征  

Sorption and desorption of copper and nickel in the irrigated desert soil and gray calcareous soil in the arid regions oasis

作　　者：王胜利[1] 南忠仁[1] 赵转军[1] 胡小娜[1] 黄璜[1] 晋王强[1] 赵翠翠[1] 刘姣[1] 范登耀[1] 

机构地区：[1]兰州大学资源环境学院西部环境教育部重点实验室,兰州730000

出　　处：《兰州大学学报（自然科学版）》2009年第5期23-27,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(40671167;40671179);国家环境保护公益性项目(200809098);国家重点基础研究发展计划(973计划)项目(2008CB417212);兰州大学西部环境教育部重点实验室开放课题基金项目

摘　　要：利用热力学吸附平衡法研究了干旱区绿洲灌漠土和灰钙土Cu,Ni的吸附解吸行为。结果表明:Henry方程,Freundlich方程可以较好地模拟Cu,Ni在灌漠土和灰钙土中的等温吸附特征;灌漠土和灰钙土对Cu,Ni吸附选择顺序都为Cu>Ni,灰钙土Cu,Ni之间的竞争作用大于灌漠土中的;灌漠土和灰钙土Cu的解吸率都远远小于Ni的,两种土壤Cu的吸附滞后作用都比Ni的强。Laboratory batch experiments were carried out to study the sorption and desorption of Cu and Ni in the irrigated desert soil and gray calcareous soil from the oasis in the arid regions of northwest China. The results show that, under the coexistence of Cu and Ni, adsorption of Cu and Ni in the irrigated desert soil and the gray calcareous soil is well described by both Henry and Freundlich equations; the selectivity sequence of Cu and Ni sorption in irrigated desert soil and gray calcareous soil is Cu〉Ni, and the competitive interaction between Cu and Ni in gray calcareous soil is more significant than that in irrigated desert soil; percentage of Cu and Ni desorption in irrigated desert soil and gray calcareous soil is Cu〉Ni, and sorption hysteresis of Cu and Ni in both soils is also Cu〉Ni.

关 键 词：灌漠土 灰钙土 CU NI 吸附 解吸 

分 类 号：P903[天文地球—自然地理学] X53[环境科学与工程—环境工程]