Nitrogen/phosphorus enriched biochar with enhanced porosity activated by guanidine phosphate for efficient passivation of Pb(II), Cu(II) and Cd(II)

doi:10.1016/j.molliq.2020.115071

	Nitrogen/phosphorus enriched biochar with enhanced porosity activated by guanidine phosphate for efficient passivation of Pb(II), Cu(II) and Cd(II)
	Meng, Xiang 1; Hu, Rui 2
刊名	JOURNAL OF MOLECULAR LIQUIDS
	2021-02-01
卷号	323
关键词	Efficient nitrogen/phosphorus modification Guanidine phosphate activator Enhanced porosity Heavy metal passivation Mineralization
ISSN号	0167-7322
DOI	10.1016/j.molliq.2020.115071
通讯作者	Hu, Rui(ruihu@rntek.cas.cn)
英文摘要	Nitrogen/phosphorus enriched biochars with enhanced porosity were prepared through a one-step pyrolysis of bamboo sawdust activated by guanidine phosphate (GP). The thermal decomposition of GP released alkaline gas and hydrogen proton to create more micropores in biochar matrix which were extended to be mesopores further. Nitrogenous/phosphorous moieties of GP were introduced into biochars efficiently via cross-linking with the carbon skeleton. GP-activated biochar pyrolyzed at 450 degrees C exhibited enriched surface functional groups (113 at.% for N. 4.1 at.% for P), resulting in high sorption capacities for aquatic Pb(II) (1662 mg/g), Cu(II) (81.7 mg/g), and Cd (II) (60.3 mg/g). Pb(II) was passivated fast with the formation of minerals including Pb-5 (PO4)(3)OH and Pb-5(PO4)(3)Cl. Cu(II) was strongly coordinated with the N-containing species especially pyridinic N. Cd(II) was also captured efficiently due to the chemical complexation, cation exchange and cation-pi bonds. GP-activated biochars could be well-recycling used to capture these heavy metals. Regarding these, the activation of biomass residuals could be an efficient approach to functionalize the surface of biochars with enhanced porosity, which is great benefiting for the immobilization of heavy metals from contaminated water. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[21875257] ; program of Chongqing University of Arts and Sciences[P2018CL09] ; CAS Pioneer Hundred Talents Program
WOS关键词	HEAVY-METAL REMOVAL ; AQUEOUS-SOLUTIONS ; PHOSPHORIC-ACID ; PHYTIC ACID ; ADSORPTION ; LEAD ; CARBON ; SORPTION ; CADMIUM ; COPPER
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000610844800111
资助机构	National Natural Science Foundation of China ; program of Chongqing University of Arts and Sciences ; CAS Pioneer Hundred Talents Program
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120625]
专题	中国科学院合肥物质科学研究院
通讯作者	Hu, Rui
作者单位	1.Chongqing Univ Arts & Sci, Sch Mat Sci & Engn, Chongqing Key Lab Mat Surface Interface Sci, Chongqing 402160, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Meng, Xiang,Hu, Rui. Nitrogen/phosphorus enriched biochar with enhanced porosity activated by guanidine phosphate for efficient passivation of Pb(II), Cu(II) and Cd(II)[J]. JOURNAL OF MOLECULAR LIQUIDS,2021,323.
APA	Meng, Xiang,&Hu, Rui.(2021).Nitrogen/phosphorus enriched biochar with enhanced porosity activated by guanidine phosphate for efficient passivation of Pb(II), Cu(II) and Cd(II).JOURNAL OF MOLECULAR LIQUIDS,323.
MLA	Meng, Xiang,et al."Nitrogen/phosphorus enriched biochar with enhanced porosity activated by guanidine phosphate for efficient passivation of Pb(II), Cu(II) and Cd(II)".JOURNAL OF MOLECULAR LIQUIDS 323(2021).