BDD电极电化学氧化处理TAIC生产废水研究

Experimental Study on BDD Electrode Electrochemical Oxidation of TAIC Production Wastewater

采用掺硼金刚石薄膜(BDD)电极电化学氧化工艺处理某新材料厂的三烯丙基异氰尿酸酯(TAIC)生产稀释废水,利用单因素分析方法探讨了电流密度、初始p H、外加氯化钠(Na Cl)浓度3个工艺因素对处理效果的影响。针对初始COD_(Cr)为3500mg/L、TN为560mg/L、NH_(3)-N为0mg/L的含氮有机废水,电化学氧化的优化条件为:电流密度为60m Acm^(2)、初始p H为7、外加Na Cl浓度为2000mg/L,在此工艺条件下电化学氧化3h后,废水COD_(Cr)降为47mg/L,TN降为101mg/L、NH_(3)-N为14mg/L,同步实现了对有机污染物的降解矿化以及有机氮转为氨氮后的折点氯化脱氮。由此可见,BDD电极电化学氧化工艺对TAIC生产稀释废水的处理切实可行。

The boron-doped diamond(BDD)electrode electrochemical oxidation process was used to treat diluted wastewater from triallyl isocyanurate(TAIC)production in a new material plant,the effects of current density,initial pH and NaCl concentration on the treatment were investigated by single factor analysis.For nitrogenous organic wastewater with an initial COD_(Cr) of 3500 mg/L,TN of 560 mg/L,and NH_(3)-N of 0 mg/L,the optimal conditions for electrochemical oxidation are as follows:the current density was 60 mA/cm^(2),the initial pH was 7,and the added NaCl concentration was 2000 mg/L.After electrochemical oxidation for 3 hours under these conditions,the COD_(Cr) of the wastewater was reduced to 47 mg/L,the TN was reduced to 101 mg/L,and the NHH_(3)-N was only 14 mg/L,which synchronously achieves the degradation and mineralization of organic pollutants,as well as the breakpoint chlorination denitrification after the conversion of organic nitrogen to ammonia nitrogen.Therefore,the BDD electrode electrochemical oxidation process is practical for the treatment of diluted wastewater from TAIC production.