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Enhanced adsorption of Pb(II) onto modified hydrochar: Modeling and mechanism analysis
Xia, Yu; Yang, Tianxue; Zhu, Nengmin; Li, Dong; Chen, Zeliang; Lang, Qianqian; Liu, Zhengang; Jiao, Wentao
2019-09-01
Source PublicationBIORESOURCE TECHNOLOGY
ISSN0960-8524
Volume288Pages:-
AbstractA highly efficient modified hydrochar material by H2O2 and ultrasonic synergistic treatment was prepared for Pb2+ removal in aqueous solution. The removal mechanism was investigated by a number of techniques and was provided by quantitative calculation. The maximum adsorption capacity of Pb2+ by the modified hydrochar was calculated to be 92.80 mg g(-1) at pH 5.0 and 298 K, which was more than 42 times higher than pristine hydrochar (2.20 mg g(-1)) and much higher than the other reported modified hydrochar materials. The characterization results showed that H2O2 treatment changed elemental composition, surface charge and increased oxygen-containing functional groups of the hydrochar. The mechanism study indicated that complexation with free carboxyl and hydroxyl and cation-pi interaction were main mechanisms responsible for Pb2+ sorption and their corresponding contribution percentage of different mechanisms to the Pb2+ sorption was accounting for 62.12%, 27.14% and 10.74%, respectively.
Department土壤环境科学与技术实验室
KeywordHydrothermal biochar Hydrogen peroxide Kinetics Isotherms Adsorption mechanism
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43295
Collection土壤环境科学实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, 18 Shuangqing Rd, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Xia, Yu,Yang, Tianxue,Zhu, Nengmin,et al. Enhanced adsorption of Pb(II) onto modified hydrochar: Modeling and mechanism analysis[J]. BIORESOURCE TECHNOLOGY,2019,288:-.
APA Xia, Yu.,Yang, Tianxue.,Zhu, Nengmin.,Li, Dong.,Chen, Zeliang.,...&Jiao, Wentao.(2019).Enhanced adsorption of Pb(II) onto modified hydrochar: Modeling and mechanism analysis.BIORESOURCE TECHNOLOGY,288,-.
MLA Xia, Yu,et al."Enhanced adsorption of Pb(II) onto modified hydrochar: Modeling and mechanism analysis".BIORESOURCE TECHNOLOGY 288(2019):-.
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