Cd在不同盐碱化土壤中的解吸特性  

Desorption Characteristics of Cd in Different Saline-alkali Stress Soils

作　　者：颜廷玉 王荣兴 金春玉 马秀兰[1] 孙方圆 韩兴[1] YAN Tingyu;WANG Rongxing;JIN Chunyu;MA Xiulan;SUN Fangyuan;HAN Xing(College of Resources and Environment,Jilin Agricultural University,Changchun 130118,China;Central Station of Agricultural Environment Protection and Rural Energy Management of Jilin Province,Changchun 130033,China;Jiangnan Town Agricultural Technology Promotion Station,Dunhua 133799,China;Changchun Jinsai Pharmaceutical Co.,Ltd.,Changchun 130012,China)

机构地区：[1]吉林农业大学资源与环境学院,长春130118 [2]吉林省农业环境保护与农村能源管理总站,长春130033 [3]吉林省敦化市江南镇农业技术推广站,敦化133799 [4]长春金赛药业有限责任公司,长春130012

出　　处：《吉林农业大学学报》2023年第2期188-194,共7页Journal of Jilin Agricultural University

基　　金：吉林省科技发展计划项目(20210202119NC,20200402013NC)。

摘　　要：为了解Cd在不同盐碱化土壤中的解吸特性,通过批量平衡解吸试验,探究重金属Cd在3种盐碱化土壤中的解吸行为及不同环境因素对Cd解吸特性的影响。结果表明:Cd在3种土壤中的解吸过程分为快速解吸阶段、慢速解吸阶段和解吸平衡阶段,且准二级动力学方程对其拟合效果较好;Cd在3种土壤上的解吸能力顺序为重度盐碱化土壤>中度盐碱化土壤>轻度盐碱化土壤;在试验pH范围内(3~11),3种土壤对Cd的解吸量呈先降低后略有增加的趋势;Al^(3+)、Ca^(2+)和Na^(+)浓度的增加均使3种土壤对Cd的解吸量增加;添加生物质炭的3种土壤对Cd的解吸量减少。In order to understand the desorption characteristics of Cd in different saline-alkali soils,the desorption behavior of heavy metal Cd in three saline-alkali soils and the effects of different environmental factors on Cd desorption characteristics were investigated by batch equilibrium desorption experiments.The results showed that the desorption process of Cd in the three soils was divided into fast desorption stage,slow desorption stage and desorption equilibrium stage,and the quasi-second-order kinetic equation had a good fitting effect;The desorption capacity of Cd on the three soils was in the order of severe saline-alkali soil>moderate saline-alkali soil>slight saline-alkali soil;Cd desorption in all the three soils were spontaneous,endothermic and disordered in the test pH range(3-11),and the desorption of Cd in the three soils decreased first and then increased slightly;The increase of Al^(3+),Ca^(2+)and Na^(+)increased the desorption of Cd in the three soils;The desorption of Cd in the three soils added with biochar was reduced.

关 键 词：CD 盐碱土 解吸特性 PH 金属离子 生物质炭 

分 类 号：S156.4[农业科学—土壤学]