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Effect of H2O2 concentrations on copper removal using the modified hydrothermal biochar

TitleEffect of H2O2 concentrations on copper removal using the modified hydrothermal biochar
Publication TypeJournal Article
Year of Publication2016
AuthorsZuo, XiaoJun, Liu Zhengang, and Chen Mindong
JournalBioresource Technology
Volume207
Pagination262 - 267
Date Published05/2016
ISSN09608524
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 (53.8 mg g−1) > mHLG1 (44.2 mg g−1) > mHLG3 (42.0 mg g−1) > mHLG0 (35.8 mg g−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.

URLhttp://www.sciencedirect.com/science/article/pii/S0960852416301584
DOI10.1016/j.biortech.2016.02.032
Short TitleBioresource Technology