化学沉降沸石吸附法处理高浓度电镀含锌废水的研究

摘要

含锌废水对人体健康和环境具有严重的危害性。处理高浓度的含锌废水时需先进行化学沉降,然后再进行深度处理。试验结果证明,对于含289 mg/L Zn2＋的电镀废水,用质量分数为10%的氢氧化钠处理,其投加量为3.7 mL/100 mL,处理后的Zn2＋的浓度为6.6 mg/L。再用沸石进行吸附,沸石用量为0.25 g/L,搅拌（110 r/min）50 min,处理后,废水的锌离子去除率最高可达88.8%,剩余Zn2＋浓度为0.47 mg/L,远低于《国家污水综合排放标准》（GB 8978-2002）的一级标准。%The zinc-containing wastewater is serious harm on human health and the environment.To deal with high concentrations of zinc-containing waste water,it is required to chemical deposition first and then advanced treatment.The test result proved that using sodium hydroxide whose quality percentage is 10% to deal with the zinc-containing wastewater at high concentration,its aditive amount is 3.7mL/100mL.After that,zinc concentration is 6.6mg/L.Then using the zeolite to carry on the adsorption,the added amount of zeolite is 0.25g/L,and the agitation is（110r/min） 50min.After the processing,removal rate of zinc in Wastewater is 88.8%,concentration is 0.47mg/L,below the first level of integrated wastewater discharge standard（GB8978-2002）.