臭氧联合混凝沉淀法去除浮选废水中有机磷

发布时间：2018-04-08 20:22

  本文选题：巯基磷酸盐　切入点：有机磷　出处：《环境工程学报》2017年01期

【摘要】：采用臭氧-混凝沉淀法去除广西某铅锌矿选矿厂尾矿库外排废水中的有机磷。有机磷主要来源于废水中残留的巯基磷酸盐类浮选药剂苯胺黑药(二苯胺基二硫代磷酸)和丁铵黑药(二丁基二硫代磷酸铵)。实验研究表明:废水中磷的存在形式90%以上为有机磷,钙盐、铁盐和铝盐无法通过混凝沉淀将有机磷去除。研究了臭氧氧化时有机磷转化为无机磷的规律,臭氧氧化可将大部分有机磷转化为无机磷。转化后的无机磷可通过硫酸铝和PAM混凝沉淀去除,尾矿库外排废水中总磷(TP)浓度由1.4~1.7下降至0.2~0.4 mg·L~(-1),明显低于《铅、锌工业污染物排放标准》(GB 25466-2010)中的≤1.0 mg·L~(-1)的要求。
[Abstract]:Organophosphorus in waste water from tailings reservoir of a lead-zinc ore concentrator in Guangxi was removed by ozone-coagulation precipitation method.Organophosphorus mainly comes from mercaptophosphate flotation reagent aniline black drug (diphenylamino dithiophosphoric acid) and ammonium butylammonium black drug (di#china_person0# ammonium dithiophosphate).The experimental results show that more than 90% of the phosphorus in the wastewater is organophosphorus, calcium salt, iron salt and aluminum salt can not be removed by coagulation precipitation.The conversion of organophosphorus to inorganic phosphorus during ozone oxidation was studied. Ozone oxidation can convert most organic phosphorus into inorganic phosphorus.After conversion, the inorganic phosphorus can be removed by aluminum sulfate and PAM coagulation precipitation. The concentration of total phosphorus in waste water from tailings reservoir is reduced from 1.4 to 0.2U 0.4 mg / L ~ (-1), which is obviously lower than the requirement of < lead, zinc industrial pollutant discharge standard (GB25466-2010) 鈮，

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