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Co-pyrolysis of corn stover with industrial coal ash for in situ efficient remediation of heavy metals in multi-polluted soil
Xia, Yu1,2,3; Li, Yi4; Sun, Yuting5; Miao, Wei3; Liu, Zhengang1,2
2021-11-15
Source PublicationENVIRONMENTAL POLLUTION
ISSN0269-7491
Volume289Pages:8
AbstractCoal ash incorporated biochar (CA/BC) composite was prepared by co-pyrolysis of agricultural residue and in-dustrial coal ash and applied for remediation of soils polluted by lead (Pb) and cadmium (Cd). The results showed that immobilization efficiency of CA/BC for heavy metals (HMs) was significantly enhanced by 77.1 % (Pb) and 42.7 % (Cd) compared to pristine biochar (BC), and this was mainly due to the increased pH value, surface functionality and surface negative charge. By the introduction of 5 % CA/BC, the polluted soils showed the highest reduction of leaching toxicity by 67.9 % (Pb) and 49.7 % (Cd), respectively. The chemical speciation of Pb and Cd in soils was changed remarkably and the reduced bioavailable Pb and Cd were mainly transformed from acid-soluble fraction into the most stable form of residual fraction. The mechanism study showed that surface precipitation, complexation, cation exchange and cation-pi interaction of CA/BC mainly contributed to heavy metals (HMs) immobilization. The pot experiments further confirmed that incorporation of 5 % CA/BC effectively reduced plant Pb and Cd accumulation by 81 % and 62.5 % respectively, and significantly promoted the plant growth of paddy rice by 3.1, 2.2 and 2.0 times in terms of root, stem length and dry mass parameters. The present study offered a cost-effective and green method to prepare soil amendment with great potential for remediation of soils polluted by HMs and realized the value-added utilization of waste agricultural residue and industrial coal ash.
KeywordCoal ash Waste biomass Polluted soil Soil remediation Paddy rice
DOI10.1016/j.envpol.2021.117840
Language英语
WOS KeywordFLY-ASH ; CONTAMINATED SOILS ; RELATIVE DISTRIBUTION ; SORPTION MECHANISMS ; AQUEOUS-SOLUTION ; BIOCHAR ; CADMIUM ; BIOAVAILABILITY ; REMOVAL ; IMMOBILIZATION
Funding ProjectKey Research Program of Chinese Academy of Science[ZDRW-ZS-2018-1-3]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationKey Research Program of Chinese Academy of Science
WOS IDWOS:000696803700002
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/50185
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Zhengang
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Dept Solid Waste Treatment & Recycling, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Urban Construct Design & Res Inst Co Ltd, Beijing 100120, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn IPE, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
5.Beijing Univ Chem Technol, Coll Life Sci & Technol, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Xia, Yu,Li, Yi,Sun, Yuting,et al. Co-pyrolysis of corn stover with industrial coal ash for in situ efficient remediation of heavy metals in multi-polluted soil[J]. ENVIRONMENTAL POLLUTION,2021,289:8.
APA Xia, Yu,Li, Yi,Sun, Yuting,Miao, Wei,&Liu, Zhengang.(2021).Co-pyrolysis of corn stover with industrial coal ash for in situ efficient remediation of heavy metals in multi-polluted soil.ENVIRONMENTAL POLLUTION,289,8.
MLA Xia, Yu,et al."Co-pyrolysis of corn stover with industrial coal ash for in situ efficient remediation of heavy metals in multi-polluted soil".ENVIRONMENTAL POLLUTION 289(2021):8.
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