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Humic acid (HA), fulvic acid (FA) and hydrophilic fraction of fulvic acid (FAHPI) were isolated from bottom sediments of a drinking water reservoir in North China. The effects of ultraviolet (UV) irradiation on the structure of the sedimentary natural organic matter (NOM) and subsequent disinfection by-products (DBPs) formation were investigated, with the comparison of commercial humic substances...
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