Copper Speciation Evolution in Swine Manure Induced by Pyrolysis

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Copper Speciation Evolution in Swine Manure Induced by Pyrolysis
	Cheng, Yuan; Luo, Lei; Lv, Jitao; Li, Gang; Wen, Bei; Ma, Yibing; Huang, Rixiang
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2020-07-21
卷号	54 期号:14 页码:9008-9014
ISSN号	0013-936X
英文摘要	Swine manures generally contain high levels of copper (Cu) resulting from its use as a growth promoter in feedstuff. Pyrolysis can further concentrate Cu whereas decrease its available fraction in swine manures. Here we investigated the speciation transformation of Cu and associated elements in swine manures induced by pyrolysis using multiple X-ray absorption spectroscopies. Results showed that over 82% of Cu existed as Cu(I)-S and Cu(I)-thiolate complexes in swine manures, which were transformed into stable Cu(I)(2)S during pyrolysis at a low temperature of 300 degrees C and partially oxidized and desulfurized into Cu(II) compounds at a high temperature of 500 degrees C. The speciation evolution of Cu in swine manures was consistent with the speciation distribution of sulfur in feedstuff and its following changes in swine manures during pyrolysis. About 58% of phosphorus existed as CaHPO4 and struvite in swine manures, which were gradually transformed into stable Ca-bound species such as hydroxyapatite during pyrolysis. The formation of stable phosphate, together with concentrated carbonates, significantly decreased the available Cu in pyrolyzed manures. These findings suggested that the high levels of S and P in feedstuff profoundly affected the speciation of Cu in the swine manures and derived biochars. This study has important implications to our understanding of the behaviors of heavy metals in manure-derived biochars once entering soil environments.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44646]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Cheng, Yuan,Luo, Lei,Lv, Jitao,et al. Copper Speciation Evolution in Swine Manure Induced by Pyrolysis[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2020,54(14):9008-9014.
APA	Cheng, Yuan.,Luo, Lei.,Lv, Jitao.,Li, Gang.,Wen, Bei.,...&Huang, Rixiang.(2020).Copper Speciation Evolution in Swine Manure Induced by Pyrolysis.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(14),9008-9014.
MLA	Cheng, Yuan,et al."Copper Speciation Evolution in Swine Manure Induced by Pyrolysis".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.14(2020):9008-9014.