期刊论文

Study on Passivation Effect of Four Amendment on Cd and As in Complex Pollution Soil

中文

环境科学与管理

1674-6139

2020

45

4

77-81

10.3969/j.issn.1673-1212.2020.04.016

2016YFD0800705:国家重点研发计划 No.2018JJ3880:湖南省自然科学基金

本校为第一机构

为论证4种土壤改良剂对土壤交换态Cd和As的影响,将其施加于Cd、As复合污染土壤中,设置施加浓度均为0.5、1.0、2.0、4.0 g·kg-1,研究4种改良剂同步钝化Cd和As的效果.结果表明:(1)与对照相比,0.5～4.0 g·kg-1的改良剂LSA1、LSA2、LS能分别提高土壤pH值0.11～0.44、0.01～0.22、0.38～0.84个单位,而改良剂A则降低土壤pH值0.02～0.54个单位.(2)LSA1、LSA2、LS能降低土壤交换态Cd含量,使土壤交换态Cd较对照分别降低5.9％ ～26.5％、3.0％ ～23.3％和15.0％ ～50.0％.(3)LSA1、LSA2、LS和A使土壤交换态As含量分别降低34.3％、28.6％、5.7％ ～40.0％和2.9％ ～45.7％.(4)改良剂LSA1与LS均能够实现土...

To study the effects of amendments on synchronous stabilization and exchangeable contents of soil Cd and As,four amendments with ratios of 0.5,1.0,2.0,and 4.0 g·kg^-1 were added to a soil complexly polluted with Cd and As.The results showed that:(1)Compared to the control,0.5 to 4.0 g·kg^-1 of LSA1,LSA2,and LS increased soil pH values by 0.11~0.44,0.01~0.22 and 0.38~0.84,respectively;but amendment A decreased soil pH values by 0.02~0.54.(2)Exchangeable contents of soil Cd were reduced 5.9%~26.5%,3.0%~23.3%and 15.0%~50.0%,respectively,due to a...