title: Adsorption and removal of triphenylmethane dyes from water by magnetic reduced graphene oxide.
abstract: 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.
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution.
authors.forename: Jian-Zhong
authors.initials: JZ
authors.lastname: Sun
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution.
authors.forename: Zhi-Hong
authors.initials: ZH
authors.lastname: Liao
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution.
authors.forename: Rong-Wei
authors.initials: RW
authors.lastname: Si
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution; School of Environmental studies, Kenyatta University, P.O Box 43844-00200 Nairobi, Kenya.
authors.forename: Gakai Peter
authors.initials: GP
authors.lastname: Kingori
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution.
authors.forename: Fu-Xiang
authors.initials: FX
authors.lastname: Chang
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution.
authors.forename: Lu
authors.initials: L
authors.lastname: Gao
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Shen
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution.
authors.forename: Xiang
authors.initials: X
authors.lastname: Xiao
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution.
authors.forename: Xiang-Yang
authors.initials: XY
authors.lastname: Wu
authors.affiliation: School of the Environment, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu Province, China E-mail: ycyong@ujs.edu.cn *Equal contribution.
authors.forename: Yang-Chun
authors.initials: YC
authors.lastname: Yong
mesh_terms: D000327:Adsorption; D004396:Coloring Agents / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D007700:Kinetics; D053761:Nanocomposites / Q000737:chemistry*; D014320:Triphenylmethyl Compounds / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D005290:Ferric Compounds; D014320:Triphenylmethyl Compounds; D014874:Water Pollutants, Chemical; C000499:ferric oxide; D006108:Graphite; C046945:triphenylmethane