Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 169, Issue 1-3, Pages 621-625Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2009.03.144
Keywords
Flocculation; Mercaptoacetyl chitosan; Copper; Chitosan; Mercaptoacetic acid
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Funding
- Water Environmental Science and Engineering innovation Team Foundation of Gansu Province of China [2006-07]
- National Natural Science Foundation of China [20377020]
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A macromolecule heavy metal flocculant mercaptoacetyl chitosan (MAC) was prepared by reacting chitosan with mercaptoacetic acid. In preliminary experiments, the flocculation performance of MAC was evaluated by using wastewater containing Cu2+ or/and turbidity. Some factors which affect the removal of Cu2+ and turbidity were also studied. The experimental results showed that: (1) MAC can remove both Cu2+ and turbidity from wastewater. The removal efficiency of Cu2+ by using MAC combined with hydrolyzed polyacrylamide is higher than that by only using MAC, the removal efficiency of Cu2+ reaches above 98%; (2) when water sample containing not only Cu2+ but also turbidity-causing substance, the removal efficiency of both Cu2+ and turbidity will be promoted by the cooperation effect of each other, the residual concentration of Cu2+ reaches below 0.5 mgL(-1) and the turbidity reaches below 3 NTU, Cu2+ is more easily removed by MAC when turbidity is higher: (3) the removal efficiency of Cu2+ increases with the increase in pH value, contrarily removal efficiency of turbidity decreases with the increase in pH value. (C) 2009 Elsevier B.V. All rights reserved.
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