Title :
Removal of zinc and copper ions from water by chitosan coated permutite granules
Author :
Dai Anquan ; Peng Li
Author_Institution :
Equip. Eng. Dept., Sichuan Coll. of Archit. Technol., Deyang, China
Abstract :
Permutite and chitosan are known to be safe compounds that effectively remove metal ions from wastewater. In this study, chitosan coated permutite granules were prepared as a new adsorbent and then optimized and applied to the removal of zinc and copper ions from feed water from a local plant. TG-DTA and SEM analysis illustrated that the modified permutite was not simply a mixture, but a novel adsorbent with better thermal stability than unamended permutite. The best ratio of chitosan to permutite was 1:80 (M1) for zinc and 1:40 (M2) for copper, which could remove 58.8% and 50.2% of the ions in 30 min, respectively. M1 could decrease the zinc ions at an initial concentration of 2 mg/L by 99% in 60 min while M2 removed 50% of copper ions in 150 min, which were both improvements over unamended permutite or chitosan. The difference between zinc and copper ions adsorption on the composed material was mainly attributed to the low initial concentration and the difference in the adsorption capacity of permutite for these ions. The chitosan coated permutite granules could effectively adsorb metal ions in low concentrations and remediate micro-polluted water (with metal ions) to meet applicable standards under controlled conditions.
Keywords :
adsorption; contaminated site remediation; copper; differential thermal analysis; scanning electron microscopy; thermal stability; wastewater treatment; water pollution; zinc; SEM analysis; TG-DTA; adsorbent; chitosan coated permutite granules; copper ion adsorption; copper ion removal; micropolluted water remediation; thermal stability; time 150 min; time 30 min; time 60 min; wastewater; zinc ion adsorption; zinc ion removal; Adsorption; Copper; Ions; Materials; Thermal stability; Zinc; adsorption; chitosan; copper; permutite; zinc;
Conference_Titel :
Materials for Renewable Energy and Environment (ICMREE), 2013 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-3335-8
DOI :
10.1109/ICMREE.2013.6893731