Facile synthesis of recycling Fe3O4/graphene adsorbents with potassium humate for Cr(VI) removal

被引：44

作者：

Wang, Xiaopeng ^{[1
]}

Lu, Jing ^{[3
]}

Cao, Baoyong ^{[1
]}

Liu, Xueming ^{[2
]}

Lin, Zhang ^{[2
]}

Yang, Chao ^{[1
]}

Wu, Ronglan ^{[1
]}

Su, Xintai ^{[2
]}

Wang, Xuefeng ^{[1
]}

机构：

[1] Xinjiang Univ, Coll Chem & Chem Engn, Minist Key Lab Oil & Gas Fine Chem, Urumqi 830046, Peoples R China

[2] South China Univ Technol, Sch Environm & Energy, Minist Educ, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Guangzhou 510006, Guangdong, Peoples R China

[3] Xinjiang Uygur Autonomous Reg Acad Instrument Ana, Urumqi 830011, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2019年 / 560卷

关键词：

Hexavalent chromium; Adsorption; Potassium humate; Recycle; Magnetic nanoparticles (NPs); CHROMIUM VI; CR-VI; WATER; ADSORPTION; NANOCOMPOSITE; NANOPARTICLES; OXIDES;

D O I：

10.1016/j.colsurfa.2018.10.036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Potassium humate possesses a wide variety of oxygen-containing functional groups and has good adsorption and complexation properties for many kinds of transition metal ions. In this work, a simple and separable route had been developed to synthesize Fe3O4/graphene nanocomposite, derived from potassium humate, were employed for the effective adsorption of Cr(VI) in aqueous phase. In addition, the Fe3O4/graphene nanocomposite prepared at 600 degrees C (S-600) showed a maximum adsorption capacity of 280.6 mg/g for Cr(VI) and good cycling performance, which was much higher than those reported graphene-based adsorbents and other conventional adsorbents. The adsorptive behavior was well fitted to the Langmuir isotherm model. The adsorption kinetics for removal of Cr(VI) agreed with pseudo-second-order equation, which indicates a kind of chemical adsorption. Its superior adsorption performance might be due to the effective adsorption sites at the surface and formation of FeOH2+ on the surface of Fe3O4/graphene. This work provided a promising approach for the removal of Cr(VI) from wastewater using a Fe3O4/graphene nanocomposite, which shows a huge number of application prospects.

引用

页码：384 / 392

页数：9

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