期刊
WATER AIR AND SOIL POLLUTION
卷 224, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1007/s11270-012-1372-5
关键词
Graphene oxide; Adsorption; Copper ions; Wastewater treatment
资金
- National Natural Science Foundation of China [51071067, 21271069, 51238002, J1210040]
- Science and Technology Program of Hunan Province [2011GK3136]
Graphene oxide (GO) prepared by modified hummers method was used as adsorbent for removal of heavy metal ions. The oxygenous functional groups on the surface of GO were primarily responsible for the sorption of metal ions. The effects of the parameters of pH value, contact time, Cu(II) concentration, and adsorbent dosage on adsorption were examined. The sorption process conformed to the Freundlich isotherm, and the maximum sorption capacity of 117.5 mgg(-1) was observed at an initial pH value of 5.3 after agitating for 150 min. It was also found that Cu-pretreated GO could be desorbed by HCl and the reusability of GO could still maintain above 90 % of its initial capability after ten cycles. The results suggest that GO is an effective adsorbent for copper ions removal in water treatment.
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