Stabilizing effects on a Cd polluted coastal wetland soil using calcium polysulphide
Alternative TitleTu, C; Guan, F; Sun, YH; Guo, PP; Liu, Y; Li, LZ; Scheckel, KG; Luo, YM
Tu, C1; Guan, F1,2; Sun, YH2; Guo, PP1; Liu, Y1; Li, LZ1; Scheckel, KG4; Luo, YM1,3
2018-12-15
Source PublicationGeoderma
ISSN0016-7061
Volume332Pages:190-197
Abstract

In this study, different dosages of calcium polysulphide (CaSx) were used as an amendment to investigate effects on the immobilizing of Cd in a wetland soil by pot experiment. In addition to chemical analysis (pH and bioavailable Cd concentration), changes in soil enzyme activities, microbial carbon utilization capacity, metabolic and community diversity were examined to assess dynamic impacts on soil environmental quality and toxicity of Cd resulting from ameliorant dosing. Soil pH increased immediately upon CaSx amendment compared to the unamended control (CK), and then declined slowly to a level lower than CK. Diethylenetriamine pentaacetic acid (DTPA) extractable Cd concentration was determined to characterize the bioavailability of Cd in the soil. The CaSx dose-dependent effect observed that with increasing CaSx dosage, the immobilizing efficiency decreased. Soil urease and catalase activity assays and Biolog EcoPlate assay indicated that early stage addition of CaSx significantly inhibited soil microbial activities. However, mid and late stage time periods showed the inhibition effects were alleviated, and the microbial activities could be recovered in 1% and 2% CaSx treatments. Moreover, with increasing incubation time, microbial community diversity and richness were significantly recovered in 1% and 2% CaSx treatments compared to the CK. No considerable changes were observed in the 5% CaSx treatment. Conclusively, the 1% CaSx amendment was an efficient and safe dosage for the stabilization of Cd contaminated wetland soil. This study contributes to the development of in situ remediation ameliorants and technologies for heavy metal polluted wetland soils.

KeywordCadmium Calcium Polysulfide Bioavailability Stabilization Soil Enzyme Microbial Diversity
Department中科院海岸带环境过程与生态修复重点实验室
Subject AreaAgriculture
MOST Discipline CatalogueSoil Science
DOI10.1016/j.geoderma.2018.07.013
Indexed BySCI
WOS KeywordHeavy-metals ; Contaminated Soil ; Microbial Communities ; Functional Diversity ; Organic Amendments ; Carbon ; Removal ; Lime ; Ions ; Remediation
SubtypeArticle
Language英语
WOS SubjectSoil Science
WOS IDWOS:000441487000019
Citation statistics
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/24109
Collection中科院海岸带环境过程与生态修复重点实验室_污染过程与控制实验室
Corresponding AuthorLuo, YM
Affiliation1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat
2.Qingdao Univ Sci & Technol, Coll Environm & Safety Engn
3.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat
4.US EPA, Natl Risk Management Res Lab
First Author AffilicationYantai Institute of Coastal Zone Research, Chinese Academy of Sciences
Corresponding Author AffilicationYantai Institute of Coastal Zone Research, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Tu, C,Guan, F,Sun, YH,et al. Stabilizing effects on a Cd polluted coastal wetland soil using calcium polysulphide[J]. Geoderma,2018,332:190-197.
APA Tu, C.,Guan, F.,Sun, YH.,Guo, PP.,Liu, Y.,...&Luo, YM.(2018).Stabilizing effects on a Cd polluted coastal wetland soil using calcium polysulphide.Geoderma,332,190-197.
MLA Tu, C,et al."Stabilizing effects on a Cd polluted coastal wetland soil using calcium polysulphide".Geoderma 332(2018):190-197.
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