Removal of As(Ⅲ) and As(Ⅴ) from groundwater using magnetic nanonmeter-size iron ozides
A new and simple method for removal As(Ⅲ) and As(Ⅴ) in groundwater using magnetic nanonmeter-size iron oxides was reproted. The adsorption behavior of magnetic nanonmeter-size iron oxides towards As(Ⅲ) and As(Ⅴ) was investigated in detail. The adsorption efficiency(AE) was calculated by (C0-Cc)/C0×100, and AEs of As(Ⅲ) and As(Ⅴ) were over 95％ in a wide range of pH 2 to 10. The pH and composition of the raw water remained unchange besides arsenic removal with magnetic nano-oxides. The desorption of As(Ⅲ) and As(Ⅴ) was observed with 0.5mol/L NaOH solutions. Kinetic test for the sorption of As(Ⅲ) and As(Ⅴ) on magnetic nano-oxides was performed, the sorption kinetic data can be described by the Lagergren pseudo-second order rate equation. The adsorption capacity of As(Ⅲ) and As(Ⅴ) onto the adsorbent was 13.21 mg/g and 15.77mg/g, respectively. The present study might provide new avenue to achieve the arsenic concentrations required for drinking water recommended by World Health Organization (WHO).
J.Y.Zhang Q.Shuai X.G Wang W.Y.Du J.H.Cheng
Faculty of Materials Science and Chemical Engineering, P.R.China Faculty of Economy, China University of Geosciences, Wuhan 430074, P.R.China
国际会议
武汉
英文
441-444
2009-09-20（万方平台首次上网日期，不代表论文的发表时间）