title: Effect of H2O2 concentrations on copper removal using the modified hydrothermal biochar.
abstract: This study investigated effect of H2O2 concentrations on copper removal using H2O2 modified hydrothermal carbonization Cymbopogon schoenanthus L. Spreng (HLG). Sorption behaviors of Cu (II) on the modified HLG by 20% H2O2 (mHLG2) could be the most desirable. Based on Langmuir isotherm, the maximum amount of Cu (II) uptake was in the sequence of mHLG2 (53.8mgg(-1))>mHLG1 (44.2mgg(-1))>mHLG3 (42.0mgg(-1))>mHLG0 (35.8mgg(-1)), which was higher than the results from majority of previous studies, suggesting that H2O2 modification advanced sorption capacity of hydrothermal biochars evidently. Effect mechanisms exploration indicated that the difference of Cu (II) removal by biochars before and after the modification was mainly related to functional groups. Carboxylic group was responsible for the best sorption property of Cu (II) by mHLG2, which was attributed to its significant relationships with H2O2 modification and Cu (II) removal.
authors.affiliation: School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, 210044, China. Electronic address: z850108xj@163.com.
authors.forename: XiaoJun
authors.initials: X
authors.lastname: Zuo
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China.
authors.forename: Zhengang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, 210044, China.
authors.forename: MinDong
authors.initials: M
authors.lastname: Chen
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000494:pharmacology*; D003300:Copper / Q000302:isolation & purification*; D031743:Cymbopogon / Q000187:drug effects / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D013696:Temperature; D014867:Water / Q000494:pharmacology*
chemical_list: C540010:biochar; D014867:Water; D002606:Charcoal; D003300:Copper; D006861:Hydrogen Peroxide
keywords: Carboxylic group; Copper; H(2)O(2); Hydrothermal biochar; Sorption