Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting

doi:10.1038/s41598-020-73894-4

	Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting
	Guo, Hao-Nan 2,3; Wang, Li-Xia 4; Liu, Hong-Tao 1,3
刊名	SCIENTIFIC REPORTS
	2020-10-06
卷号	10 期号:1 页码:9
ISSN号	2045-2322
DOI	10.1038/s41598-020-73894-4
通讯作者	Liu, Hong-Tao(liuht@igsnrr.ac.cn)
英文摘要	This study aims to investigate the relationship between key physicochemical parameters related to composting process and bioavailability of Cd, As and Cr during swine manure composting through regulating different initial carbon to nitrogen (C/N) ratios (15:1, 20:1, 25:1) and bulking agent types (straw, green waste). Results showed that higher initial C/N ratio of 20:1 or 25:1 and straw as bulking agent were optimal to reduce the bioavailability of Cd, As and Cr (62.4%, 20.6% and 32.2% reduction, respectively). Redundancy analysis implied that the bioavailability of Cd was significantly associated with total phosphorus and total nitrogen, deducing the formation of phosphate precipitation and biosorption might participated in the reaction process, while that of As and Cr were mainly influenced by organic matter (OM), cation exchange capacity (CEC) and OM, CEC, electric conductivity, respectively. A total of 48.5%, 64.6% and 62.2% of Cd, As and Cr redistribution information could be explained by the above parameters. Further correlation analysis revealed that bioavailable As and Cr were negatively correlated with humic acid to fulvic acid ratio. In summary, this study confirms that the mechanisms of phosphate precipitation, biosorption and humification played critical role in reducing Cd, As and Cr bioavailability during swine manure composting.
资助项目	National Key R&D Program of China[2018YFD0500205] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA23050103]
WOS关键词	ORGANIC-MATTER TRANSFORMATIONS ; HEAVY-METALS ; PIG MANURE ; SEWAGE-SLUDGE ; BULKING AGENTS ; C/N RATIO ; SPECIATION ; CU ; BIOAVAILABILITY ; MOBILITY
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE RESEARCH
WOS记录号	WOS:000578479400013
资助机构	National Key R&D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/157081]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Hong-Tao
作者单位	1.Chinese Acad Sci, Engn Lab Yellow River Delta Modern Agr, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changchun 130102, Peoples R China
推荐引用方式 GB/T 7714	Guo, Hao-Nan,Wang, Li-Xia,Liu, Hong-Tao. Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting[J]. SCIENTIFIC REPORTS,2020,10(1):9.
APA	Guo, Hao-Nan,Wang, Li-Xia,&Liu, Hong-Tao.(2020).Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting.SCIENTIFIC REPORTS,10(1),9.
MLA	Guo, Hao-Nan,et al."Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting".SCIENTIFIC REPORTS 10.1(2020):9.