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The reactivity characteristics of humic acid (HA) with aluminium coagulants at different pH values was investigated. It revealed that the linear complexation reaction occurred between aluminum and humic acid at pH < 7, and the reaction rate increased as the pH increased from 2 to 6. While at pH = 7, most of the dosed aluminum existed in the form of free aluminum and remained unreacted in the presence...
The extensive usage of OTC and Cu2+ in livestock and poultry industry caused high residues in natural environment. Co-contamination of OTC and Cu2+ was a considerable environmental problem in surface waters. In this study, Cu2+ mediated direct photolysis of OTC was studied. Cu2+ chelating with OTC was found to greatly inhibit OTC photodegradation. To reveal the chelation mechanism of OTC-Cu complexes,...
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