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The effect of ozonation on the ability of humic acid to complex/coagulate with copper in aqueous solution was explored. Solutions of commercial humic acid were ozonized for various time periods and changes in total organic carbon, aromatic organic carbon vs. total organic carbon, total acidity, and copper complexation capacity of the humic acid were measured. The results showed that the ability of humic acid to complex copper decreased with exposure to ozone.
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Lin et al. (2001) studied this question.
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