Abstract:

The experimental study on the treatment of terephthalic acid industrial wastewater by heterogeneous catalytic oxidation has been carried on.The effects of the reaction time,dosage of oxidant,pH and initial concentrations of the wastewater on COD_Crremoval rate have been investigated.The results show that,using chlorine dioxide,sodium hypochlorite and H₂O₂as oxidant,high rates of COD_Crreduction could be achieved.When different oxidant is used,pH obviously influences the COD_Crremoval rate.When chlorine dioxide or sodium hypochlorite is used as oxidant,the COD_Crremoval rate is higher under acidic condition.When H₂O₂is used as oxidant,the COD_Crremoval rate is higher under neutral condition.

Key words: wastewater treatment, terephthalic acid, catalytic oxidation

摘要：

采用非均相催化氧化法处理对苯二甲酸工业废水，研究了反应时间、氧化剂投加量、废水pH和废水起始浓度对COD_Cr去除率的影响。结果表明，以二氧化氯、次氯酸钠和双氧水作氧化剂，均可使废水的COD_Cr大幅度下降。采用不同的氧化剂时，废水的pH对COD_Cr去除率有明显的影响。在酸性条件下，用二氧化氯和次氯酸钠的COD_Cr去除率较高；而在中性条件下，采用双氧水的CODCr去除率较高。

关键词: 废水处理, 对苯二甲酸, 催化氧化

CLC Number: 

• X703.1