Fenton氧化-沸石吸附联合处理化学镀镍废水

以Ni~(2+)、总磷和氨氮为考察对象,采用Fenton氧化和沸石吸附联合处理化学镀镍废水。探讨了Fenton破络及协同氧化非正磷酸盐时,H_2O_2的质量浓度、m(Fe~(2+))∶m(H_2O_2)、初始pH值对Ni~(2+)和总磷去除率的影响。另外,研究了沸石吸附氨氮时,沸石量、吸附时间、吸附pH值对氨氮去除率的影响。结果表明:当H_2O_2的质量浓度为6.66g/L、m(Fe~(2+))∶m(H_2O_2)为0.06、初始pH值为3时,破络完全,非正磷酸盐转化率为99.45%;同时,Ni~(2+)和总磷的去除率分别达到99.72%和91.88%。当沸石量为8g/100mL、pH值为7、反应时间为60min时,氨氮的去除率为86.30%。

Treatment of Electroless Nickel Plating Wastewater by the Combined Processes of Fenton Oxidation and Clinoptilolite Adsorption

Ni2+,total phosphorus and ammonia nitrogen were taken as investigation objects,electroless nickel plating wastewater was treated by the combined processes of Fenton oxidation and clinoptilolite adsorption.The effects of mass concentration of H2 O2,ratio of Fe2+ to H2 O2,initial pH value on the removal rate of Ni2+ and total phosphorus were investigated during the decomplexation process and non-orthophosphate conversion by Fenton oxidation.Furthermore,the effects of concentration of clinoptilolite,adsorption time and initial pH value on the removal rate of ammonia nitrogen were studied during the clinoptilolite adsorption process.Results showed that,when mass concentration of H2O2 was 6.66 g/L,ratio of Fe2+ to H2O2 was 0.06,initial pH value was 3,the decomplexation process was completed and the conversion rate of non-orthophosphate reached up to 99.45％.Meanwhile,the removing rate of nickel and total phosphorus reached up to 99.72 ％ and 91.88％ respectively.When concentration of clinoptilolite was 8 g/100 mL,pH value was 7,reaction time was 60 min,the removal rate of ammonia nitrogen reached up to 86.30％.