臭氧催化氧化处理化学镀镍废水  

Treatment of electroless nickel-plating wastewater by ozone catalytic oxidation

作　　者：张耀辉[1] 高柳 徐军[1] 涂勇[1] 陈勇[1] 白永刚[1] 周亮 陈佳佳 ZHANG Yaohui;GAO Liu;XU Jun;TU Yong;CHEN Yong;BAI Yonggang;ZHOU Liang;CHEN Jiajia(Jiangsu Key Laboratory of Environmental Engineering,Jiangsu Provincial Academy of Environmental Science,Nanjing 210036,China)

机构地区：[1]江苏省环境科学研究院,江苏省环境工程重点实验室,南京210036

出　　处：《环境工程学报》2020年第2期342-348,共7页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07202-01)。

摘　　要：采用臭氧催化氧化工艺处理化学镀镍废水,以Fe2O3-TiO2-MnO2/A12O3作为臭氧催化剂,考察了不同反应条件下臭氧催化氧化对化学镀镍废水的影响。结果表明,在初始pH为9,臭氧投加量为300 mg·L^-1,反应时间为60 min的最佳反应条件下,水中COD可从532 mg·L^-1下降至285 mg·L^-1,去除率达到46.4%。臭氧催化氧化对化学镍具有较好的破络效果,在初始pH为9,臭氧投加量为200 mg·L^-1,反应为60 min后进行混凝过滤,水中镍的去除率可达到86.7%。紫外全波段扫描分析发现,经臭氧催化氧化后,各波段的吸收峰均有大幅度下降,位于254 nm和320 nm处的吸收峰基本消失,说明水中的苯环类物质和共轭结构被破坏。经臭氧催化氧化后,废水的生物毒性大幅降低,废水的可生化性提高,出水B/C由原来的0.12提高到0.36,为后续进一步生化处理提供了条件。Electroless nickel plating wastewater was treated by ozone catalytic oxidation with a type of Fe2O3-TiO2-MnO2/A12O3 catalyst. The effects of different reaction conditions on the treatment performance were studied. The results showed that COD in wastewater decreased from 532 mg·L^-1 to 285 mg·L^-1, and the corresponding removal efficiency reached 46.4% under the optimize conditions: initial pH=9, O3 dosage of 300 mg·L^-1 and oxidation time of 60 min. Ozone catalytic oxidation also presented a good effect on the breakage of the complexes for electroless nickel-plating wastewater. The Ni removal rate reached 86.7% after coagulation and filtration of ozone oxidized wastewater at initial p H=9, O3 dosage of 200 mg·L^-1 and oxidation time of 60 min. Ultraviolet spectrum analysis showed that the absorption peaks of each band decreased significantly after ozone catalytic oxidation, and the absorption peaks at 254 nm and 320 nm almost disappeared, which indicates that the benzene-ring species and conjugated structure in the wastewater were destroyed. After ozone-catalyzed oxidation, the biological toxicity of wastewater was greatly reduced, and its biodegradability was improved. The B/C ratio of effluent increased from 0.12 to 0.36, which was beneficial for further biochemical treatment.

关 键 词：化学镀镍废水 臭氧催化氧化 破络合 除镍 

分 类 号：X703[环境科学与工程—环境工程]