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Hydroxyapatite reduces potential Cadmium risk by amendment of sludge compost to turf-grass grown soil in a consecutive two-year study
Liu, Hong-tao1; Guo, Xiao-xia1,2
2019-04-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume661Pages:48-54
Corresponding AuthorLiu, Hong-tao(liuht@igsnrr.ac.cn)
AbstractRecycling of sludge compost to soil as conditioner is generally regarded as the best means of disposal. However, concerns regarding heavy metal residues and sludge toxicity have recently received increasing public attention. Cadmium (Cd) is a mobile metal commonly found in sludge; therefore, the risk posed by Cd contaminated sludge should be carefully assessed. In this report, the effects of addition of hydroxyapatite (HAP) with sludge compost amendment on potential Cd risk were investigated. The results of consecutive two years showed that exchangeable Cd content in treatment of sludge compost with 1.5% HAP decreased by 6.0% compared with single sludge compost treatment, and residual Cd increased by 7.6%. Compared with single sludge compost, the incremental rate of exchangeable Cd dropped by 38.3% and the reductive rate of residual Cd increased by 37.7% in response to 1.5% HAP addition, indicating that HAP played a role of decreasing Cd phytoavailability. The HAP reduced the amount of Cd uptaken by turf-grass in both root and leaf. Moreover, HAP remarkably improved the quality of turf grass grown in amended soil, including leaf greenness, green maintainable period and root strength. However, HAP did not attenuate the downward mobility of Cd. Taken these together, these findings indicated that HAP can be used as a potential candidate to control surface Cd risk of sludge compost amended soil rather than that from leachate. (C) 2019 Elsevier B.V. All rights reserved.
KeywordOrganic waste Deactivator Heavy metal Soil application
DOI10.1016/j.scitotenv.2019.01.053
WOS KeywordHEAVY-METALS ; SEWAGE-SLUDGE ; CONTAMINATED SOIL ; HUMUS SOIL ; MUNICIPAL ; LEAD ; ACCUMULATION ; SPECIATION ; REMOVAL ; ZN
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2018YFD0500205] ; Chu Ko-chen Outstanding Young Scholars Program of the Institute of Geographic Sciences and Natural Resources Research, CAS[2017RC102] ; Instrument Developing Project of the Chinese Academy of Sciences[YZ201605]
Funding OrganizationNational Key Research and Development Program of China ; Chu Ko-chen Outstanding Young Scholars Program of the Institute of Geographic Sciences and Natural Resources Research, CAS ; Instrument Developing Project of the Chinese Academy of Sciences
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000458408200006
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/49358
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLiu, Hong-tao
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu, Hong-tao,Guo, Xiao-xia. Hydroxyapatite reduces potential Cadmium risk by amendment of sludge compost to turf-grass grown soil in a consecutive two-year study[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,661:48-54.
APA Liu, Hong-tao,&Guo, Xiao-xia.(2019).Hydroxyapatite reduces potential Cadmium risk by amendment of sludge compost to turf-grass grown soil in a consecutive two-year study.SCIENCE OF THE TOTAL ENVIRONMENT,661,48-54.
MLA Liu, Hong-tao,et al."Hydroxyapatite reduces potential Cadmium risk by amendment of sludge compost to turf-grass grown soil in a consecutive two-year study".SCIENCE OF THE TOTAL ENVIRONMENT 661(2019):48-54.
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