Abstract:

Fe/C micro-electrolysis-photocatalysis process has been used for pretreating electroplating wastewater which contains great quantity of Cu²⁺ and organic matter.The experimental results show that the appropriate parameters of the pretreatment are as follows:the Fe/C micro-electrolysis takes the removal of Cu²⁺ as its indicator by carrying on the orthogonal text.Its initial pH of wastewater is 3,Fe/C mass ratio 1∶1,dosage of iron 60 g/L,reaction time 60 min.The photocatalysis takes the removal of organic matter as its indicator by single-factor test,and nano-TiO₂ solution colloid as catalyst.Its pH is 3,the dosage of TiO₂ 40 mL/L,time of UV irradiation 60 min.The removal rates of Cu²⁺ removing rate in the effluent water flocculated,after the wastewater is pretreated,reaches 99.98% and COD removing rate is above 60%.

Key words: electroplating wastewater, micro-electrolysis, photocatalysis

摘要：

利用Fe/C微电解-光催化法对含有大量Cu2+和有机物的电镀废水预处理。实验结果表明,预处理的适宜参数为:Fe/C微电解法以除Cu2+为指标进行正交实验,废水初始pH=3,Fe/C=1∶1,铁投加质量浓度为60 g/L,反应时间为60 min;光催化法以除有机物为指标进行单因素实验,采用纳米TiO2溶胶为催化剂,pH=3,TiO2加入量为40mL/L,紫外光照时间60 min。电镀废水经预处理后再絮凝处理,出水Cu2+去除率为99.98%,COD去除率>60%。

关键词: 电镀废水, 微电解, 光催化

CLC Number: 

• X781.1