title: Micro-electrolysis of Cr (VI) in the nanoscale zero-valent iron loaded activated carbon.
abstract: In this paper we prepared a novel material of activated carbon/nanoscale zero-valent iron (C-Fe(0)) composite. The C-Fe(0) was proved to possess large specific surface area and outstanding reducibility that result in the rapid and stable reaction with Cr (VI). The prepared composite has been examined in detail in terms of the influence of solution pH, concentration and reaction time in the Cr (VI) removal experiments. The results showed that the C-Fe(0) formed a micro-electrolysis which dominated the reaction rate. The Micro-electrolysis reaches equilibrium is ten minutes. Its reaction rate is ten times higher than that of traditional adsorption reaction, and the removal rate of Cr reaches up to 99.5%. By analyzing the obtained profiles from the cyclic voltammetry, PXRD and XPS, we demonstrate that the Cr (VI) is reduced to insoluble Cr (III) compound in the reaction.
authors: School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China.
authors: Limei
authors: L
authors: Wu
authors: School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China. Electronic address: lbliao@cugb.edu.cn.
authors: Libing
authors: L
authors: Liao
authors: School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China. Electronic address: guochenglv@cugb.edu.cn.
authors: Guocheng
authors: G
authors: Lv
authors: Advanced Composites Centre for Innovation and Science, University of Bristol, UK.
authors: Faxiang
authors: F
authors: Qin
authors: Chemical Industry Press, Beijing 100011, China.
authors: Yujuan
authors: Y
authors: He
authors: School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China.
authors: Xiaoyu
authors: X
authors: Wang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D004566:Electrodes; D004572:Electrolysis; D007501:Iron / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D002244:Carbon; D002857:Chromium; D007501:Iron; D062065:Wastewater; D014874:Water Pollutants, Chemical; C074702:chromium hexavalent ion