Organic Chemistry: Current Research
Open Access

Chromate and arsenate removal by layered double hydroxides-polymer beads

2^nd International Conference on Past and Present Research Systems of Green Chemistry

September 14-16, 2015 Orlando, USA

Ho Nguyen Nhat Ha1,3, Tran Boi An1, Nguyen Mai Tho2, Tran Ngoc Thang2, Bui QuangMinh1, Cao Van Du4 and Nguyen Thi Kim Phuong1

1Vietnam Academy of Science and Technology, Vietnam 2Industrial University of Ho Chi Minh, Vietnam 3Vietnam National University, Vietnam 4Lac Hong University, Vietnam

Scientific Tracks Abstracts: Organic Chem Curr Res

Abstract :

In this study, a novel Mg-Al-Cl and Mg-Fe-Cl beads were developed for removal of hexavalent chromium. The Mg-Al-Cl and Mg- Fe-Cl beads were generated by impregnating synthetic Mg-Fe-Cl and Mg-Al-Cl (with a Mg:Fe, Mg:Al molar ratio 3:1) into alginate/ PVA-glutaraldehyde gel bead. The adsorption of chromate and arsenate onto the Mg-Al-Cl and Mg-Fe-Cl beads were investigated by performing both equilibrium and kinetic batch tests. The adsorption kinetics of chromate and arsenate onto Mg-Al-Cl and Mg- Fe-Cl beads were well described by the pseudo second-order kinetic model and adsorption data fitted well to a Langmuir isotherm. Langmuir monolayer capacities were 1.4721 mg Cr/g and1.7737 mg As/g for Mg-Al-Cl beads and 1.3587 mg Cr/g and 1.6439 mg As/g for Mg-Fe-Cl beads. The removal efficiency of chromate by Mg-Al-Cl and Mg-Fe-Cl beads was 92.5% and 90.0% for the initial solution concentrations of 45 mg Cr/L, respectively. The efficiency of arsenate removal was 91.19% for Mg-Al-Cl beads and 79.08 for Mg-Fe-Cl beads at initial concentration of 50 mg As/L. Hence, the Mg-Al-Cl and Mg-Fe-Cl beads developed in this study can be used as promising adsorbents for simultaneous removal of chromate from industrial waste water or groundwater containing these contaminants.

Biography :

Email: nguyenthikimp@yahoo.ca