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Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture

文献类型：期刊论文

作者Hu, Rui1,4; Xiao, Jiang2; Wang, Tianhui3,4; Gong, Yi1,4; Chen, Guangcai2; Chen, Lin1,4; Tian, Xingyou1,4
刊名CARBON
出版日期2020-10-30
卷号168
关键词Surface modification Plasma treatment Micropore generation Compositional evolution Enhanced heavy metal uptake
ISSN号0008-6223
DOI10.1016/j.carbon.2020.07.012
通讯作者Hu, Rui(ruihu@rntek.cas.cn) ; Tian, Xingyou(xytian@issp.ac.cn)
英文摘要Highly concentrated amino group-modified biochars derived from twelve biomass residuals are achieved using a two-step radio-frequency Ar/NH3 plasma. The dependence of amino number, N bonding states, surface defects on the pretreatment time of Ar plasma, post-treatment power, duration and gas ratio are well established. For bamboo-biochar, the amino number and N content reach the maximum (8.04 x 10(16)/mg of biochar, 8.84 at.%) at 8.0% NH3 in NH3/Ar, presenting a highly consistent variation tendency with the emission intensity of NH radical. Notably, micropores can be created in matrix by the processing of plasma in moderate conditions, i.e., a given pretreatment time (e.g., 12.5 min), specific gas ratios of post-treatment (>= 50% of NH3) at high RF power (e.g., 240 W) and proper duration (<= 15.0 min). The uptake capacities of Pb(II) (123.1 mg g(-1)), Cu(II) (98.5 mg g(-1)) and Cd(II) (61.2 mg g(-1)) on aminated biochars are 5.42, 5.38 and 7.56 times higher than those on raw biochars. This study shows attractive prospects for the fundamental research in powder modification as well as potentials in environmental management. (C) 2020 Elsevier Ltd. All rights reserved.
WOS关键词OXYGEN PLASMA ; ACTIVATED CARBON ; REMOVAL ; COPPER ; ADSORPTION ; REDUCTION ; EFFICIENT ; SORPTION ; WATER ; IONS
资助项目National Natural Science Foundation of China[21875257] ; CAS Pioneer Hundred Talents Program ; CASHIPS Director's Fund, China[YZJJ2018QN20] ; China Postdoctoral Science Foundation[2018M640200] ; China Postdoctoral Science Foundation[2019T120154]
WOS研究方向Chemistry ; Materials Science
语种英语
WOS记录号WOS:000565904500009
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; CAS Pioneer Hundred Talents Program ; CASHIPS Director's Fund, China ; China Postdoctoral Science Foundation
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/70401]  
专题中国科学院合肥物质科学研究院
通讯作者Hu, Rui; Tian, Xingyou
作者单位1.Chinese Acad Sci, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
2.Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China
3.Univ Sci & Technol China, Hefei 230036, Peoples R China
4.Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Rui,Xiao, Jiang,Wang, Tianhui,et al. Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture[J]. CARBON,2020,168.
APA Hu, Rui.,Xiao, Jiang.,Wang, Tianhui.,Gong, Yi.,Chen, Guangcai.,...&Tian, Xingyou.(2020).Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture.CARBON,168.
MLA Hu, Rui,et al."Highly concentrated amino-modified biochars using a plasma: Evolution of surface composition and porosity for heavy metal capture".CARBON 168(2020).

入库方式： OAI收割

来源：合肥物质科学研究院

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