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Adsorption and removal of triphenylmethane dyes from water by magnetic reduced graphene oxide
Sun, Jian-Zhong1; Liao, Zhi-Hong1; Si, Rong-Wei1; Kingori, Gakai Peter1,3; Chang, Fu-Xiang1; Gao, Lu1; Shen, Yu2; Xiao, Xiang1; Wu, Xiang-Yang1; Yong, Yang-Chun1
2014
摘要Triphenylmethane (TPM) dye is one of the most prevalent and recalcitrant water contaminants. Magnetic reduced graphene oxide (rGO) is an efficient adsorbent for organic pollutants removal. However, the performance and adsorption kinetics of magnetic rGO towards TPM have not yet been studied. In this study, a magnetic Fe3O4@rGO nano-composite, which could be easily removed from water with a simple magnetic separation step was synthesized and characterized. The magnetic rGO showed fast adsorption rate and high adsorption capacity towards different TPM dyes (the Langmuir monolayer adsorption capacity is 64.93 mg/g for adsorption of crystal violet). The adsorption processes are well-fitted to the pseudo-second-order kinetic model (R-2 > 0.99) and the Langmuir isotherm model (R-2 = 0.9996). Moreover, the magnetic rGO also showed excellent recycling and regeneration capabilities. The results indicated that adsorption with magnetic rGO would be a promising strategy to clean up the TPM contamination.
关键词adsorption crystal violet graphene magnetic graphene triphenylmethane
DOI10.2166/wst.2014.427
发表期刊WATER SCIENCE AND TECHNOLOGY
ISSN0273-1223
卷号70期号:10页码:1663-1669
通讯作者Yong, YC (reprint author), Jiangsu Univ, Sch Environm, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China.
收录类别SCI
WOS记录号WOS:000346387800012
语种英语