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  • Na2BO3 and Na2SO4 were used as coagulant,Fe2(SO4)3 was used as sediment reagent. When the dosage of Na2BO3 was 20 mL,Na2SO4 was 20 mL,Fe2(SO4)3 was 3 mL,pH was 7,deposition time was 4 h, the CODCr removal rate can reach 89.6%.

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