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In this paper, we have presented a new method to remove Cr (VI) ions from aqueous solution. Chitosan and ferrous ions were added together to the chromium-contained solution, through two-step pH adjust, 0.5 g·l-1 chitosan and 2.0 g·l-1 FeSO4·7H2O could reduce Cr (VI) ions from 100 mg·l-1 to 0.01 mg·l-1. As compared with chitosan and ferrous alone used to remove Cr (VI), for 100 mg·l-1 Cr (VI) solution,...
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