Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure

Abstract This study was conducted to investigate the speciation, bioavailability and environmental risk of heavy metals (HMs) in chicken manure (CM) and water-washed swine manure (WSM) and their biochars produced at different pyrolysis temperatures (200 to 800 °C). As the pyrolysis temperature incre...

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Autores principales:	Andong Wang, Dongsheng Zou, Xinyi Zeng, Bin Chen, Xiaochen Zheng, Longcheng Li, Liqing Zhang, Zhihua Xiao, Hua Wang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/81e34844ae7a467e904eee748eedc63a
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spelling	oai:doaj.org-article:81e34844ae7a467e904eee748eedc63a2021-12-02T17:52:12ZSpeciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure10.1038/s41598-021-91440-82045-2322https://doaj.org/article/81e34844ae7a467e904eee748eedc63a2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91440-8https://doaj.org/toc/2045-2322Abstract This study was conducted to investigate the speciation, bioavailability and environmental risk of heavy metals (HMs) in chicken manure (CM) and water-washed swine manure (WSM) and their biochars produced at different pyrolysis temperatures (200 to 800 °C). As the pyrolysis temperature increased, the remaining proportion, toxicity characteristic leaching procedure (TCLP), HCl and diethylenetriamine pentaacetic acid (DTPA) of HMs gradually declined. This result proved that the speciation of HMs in chicken manure biochars (CMB) and water-washed swine manure biochars (WSMB) was influenced by pyrolysis temperature. The proportions of stable fractions were enhanced with increased pyrolysis temperature and weakened the HM validity for vegetation at 800 °C. Finally, the results of the risk assessment showed that the environmental risk of HMs in CMB and WSMB decreased with increasing pyrolysis temperature. Therefore, pyrolysis at 800 °C can provide a practical approach to lessen the initial and underlying heavy metal toxicity of CMB and WSMB to the environment.Andong WangDongsheng ZouXinyi ZengBin ChenXiaochen ZhengLongcheng LiLiqing ZhangZhihua XiaoHua WangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andong Wang Dongsheng Zou Xinyi Zeng Bin Chen Xiaochen Zheng Longcheng Li Liqing Zhang Zhihua Xiao Hua Wang Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure
description	Abstract This study was conducted to investigate the speciation, bioavailability and environmental risk of heavy metals (HMs) in chicken manure (CM) and water-washed swine manure (WSM) and their biochars produced at different pyrolysis temperatures (200 to 800 °C). As the pyrolysis temperature increased, the remaining proportion, toxicity characteristic leaching procedure (TCLP), HCl and diethylenetriamine pentaacetic acid (DTPA) of HMs gradually declined. This result proved that the speciation of HMs in chicken manure biochars (CMB) and water-washed swine manure biochars (WSMB) was influenced by pyrolysis temperature. The proportions of stable fractions were enhanced with increased pyrolysis temperature and weakened the HM validity for vegetation at 800 °C. Finally, the results of the risk assessment showed that the environmental risk of HMs in CMB and WSMB decreased with increasing pyrolysis temperature. Therefore, pyrolysis at 800 °C can provide a practical approach to lessen the initial and underlying heavy metal toxicity of CMB and WSMB to the environment.
format	article
author	Andong Wang Dongsheng Zou Xinyi Zeng Bin Chen Xiaochen Zheng Longcheng Li Liqing Zhang Zhihua Xiao Hua Wang
author_facet	Andong Wang Dongsheng Zou Xinyi Zeng Bin Chen Xiaochen Zheng Longcheng Li Liqing Zhang Zhihua Xiao Hua Wang
author_sort	Andong Wang
title	Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure
title_short	Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure
title_full	Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure
title_fullStr	Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure
title_full_unstemmed	Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure
title_sort	speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/81e34844ae7a467e904eee748eedc63a
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Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure

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