Arsenate adsorption on iron-impregnated ordered mesoporous carbon: Fast kinetics and mass transfer evaluation

Wang, Zhengyang1; Hu, Weiming1; Kang, Zuheng2; He, Xiaoqing3; Cai, Zhenxiao4; Deng, Baolin1,5

2019-02

10.1016/j.cej.2018.09.074

CHEMICAL ENGINEERING JOURNAL   影响因子和分区

1385-8947

1873-3212

Removal of arsenic (As) from drinking water sources is much needed worldwide, and point-of-use (POU) treatment could be an effective solution for residential applications. Adopting existing removal technologies that are successful in large-scale treatment to POU units, however, is rather ineffective due to the short hydraulic residence time in POU systems. In this study, we investigated the use of iron-containing ordered mesoporous carbon (FeOMC) for rapid arsenate [As(V)] sorption in batch reactors. The OMC was prepared by an evaporation-induced self-assembly approach followed by impregnation of iron oxides, which was identified mainly as maghemite (gamma-Fe2O3) by coupled high-resolution transmission electron microscopy and electron energy loss spectroscopy microanalysis. A rapid kinetics of As(V) adsorption was observed, showing that at an initial concentration of 52.1 mu g As/L and solid loading of 2.0 g/L, 84.8% of As(V) was removed within 90 s at pH 6.1. The kinetics was satisfactorily modelled according to the mass transfer of As(V) in a single FeOMC grain; and the results suggested that the intraparticle diffusion along the mesoporous channels could be hindered by adsorption. In summary, this study has not only developed ordered mesoporous materials for rapid arsenic adsorption but also gained insights into the factors controlling the sorption kinetics by evaluating the mass transfer inside the straight and uniform channels of surface-functionalized OMC.

Ordered mesoporous carbon Arsenate adsorption Adsorption kinetics Mesopore-scale mass transfer modeling Electron energy loss spectroscopy

SCI ; EI

英语

通讯

Program for Guangdong Innovative and Entrepreneurial Teams[2017ZT07Z479]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000448181000048

ELSEVIER SCIENCE SA

20183905875649

Adsorption ; Batch reactors ; Carbon ; Chemicals removal (water treatment) ; Dissociation ; Electron emission ; Electron energy levels ; Electron scattering ; Energy dissipation ; Hematite ; High resolution transmission electron microscopy ; Kinetics ; Mass transfer ; Mesoporous materials ; Potable water ; Self assembly

Water Resources:444 ; Minerals:482.2 ; Energy Losses (industrial and residential):525.4 ; Mass Transfer:641.3 ; Optical Devices and Systems:741.3 ; Chemical Apparatus and Plants; Unit Operations; Unit Processes:802 ; Chemical Products Generally:804 ; Classical Physics; Quantum Theory; Relativity:931 ; Materials Science:951

ENGINEERING

Web of Science

1.Univ Missouri, Dept Civil & Environm Engn, Columbia, MO 65211 USA
2.Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA
3.Univ Missouri, Electron Microscopy Core Facil, Columbia, MO 65211 USA
4.Amway Corp, Ada, MI 49355 USA
5.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Peoples R China

Wang, Zhengyang,Hu, Weiming,Kang, Zuheng,et al. Arsenate adsorption on iron-impregnated ordered mesoporous carbon: Fast kinetics and mass transfer evaluation[J]. CHEMICAL ENGINEERING JOURNAL,2019,357:463-472.

Wang, Zhengyang,Hu, Weiming,Kang, Zuheng,He, Xiaoqing,Cai, Zhenxiao,&Deng, Baolin.(2019).Arsenate adsorption on iron-impregnated ordered mesoporous carbon: Fast kinetics and mass transfer evaluation.CHEMICAL ENGINEERING JOURNAL,357,463-472.

Wang, Zhengyang,et al."Arsenate adsorption on iron-impregnated ordered mesoporous carbon: Fast kinetics and mass transfer evaluation".CHEMICAL ENGINEERING JOURNAL 357(2019):463-472.