(中南大学 冶金科学与工程学院，长沙410083)
摘 要: 针对锌冶炼行业含高浓度多种重金属的污酸特性，采用生物制剂配合-水解新工艺进行处理，工业试验运行过程中对污酸及处理后出水中各重金属及氟、氯的浓度进行监测，并对产生的渣样进行分析。结果表明：重金属浓度分别由汞14.78~56.70 mg/L、砷13.71~40.15 mg/L、锌20.50~58.90 mg/L、铅12.8~64.2 mg/L、镉2.1~13.6 mg/L、铜0.54~1.44 mg/L、氟339~512 mg/L、氯472~3400 mg/L脱除至汞0.029~0.049 mg/L、砷0.029~0.065 mg/L、锌0.11~0.37 mg/L、铅0.1~0.43 mg/L、镉低于0.01 mg/L、铜低于0.1 mg/L、氟0.054~4.99 mg/L、氯29.5~43.7 mg/L，处理后出水中各重金属含量及氟、氯含量均远低于《污水综合排放标准》(GB8978—1996)。配合渣中的汞含量高达29.95%，可作为汞原料进行回收，水解渣中重金属含量低，便于妥善处理和处置。
关键字: 污酸；生物制剂；配合；水解
acidic wastewater containing Hg by biologics in zinc smelter
（School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China）
Abstract:Acidic wastewater with high concentration of heavy metals discharged from zinc smelter industry was treated by the novel technology of biologics complex-hydrolyzation, and the removal effect of heavy metals(Hg, As, Zn, Pb, Cd, Cu) and F−, Cl− was examined. During stable industrial experiments heavy metals and F−, Cl− of acidic wastewater are removed from 14.78−56.70 mg/L Hg2+, 13.71−40.15 mg/L As, 20.50−58.90 mg/L Zn2+, 12.8−64.2 mg/L Pb2+, 2.1−13.6 mg/L Cd2+, 0.54−1.44 mg/L Cu2+, 339−512 mg/L F− and 472−3400 mg/L Cl− to 0.029−0.049 mg/L Hg2+, 0.029−0.065 mg/L As, 0.11−0.37 mg/L Zn2+, 0.1−0.43 mg/L Pb2+, 0−0.01 mg/L Cd2+, 0−0.1 mg/L Cu2+, 0.054−4.99 mg/L F− and 29.5−43.7 mg/L Cl− respectively, which are all lower than those required in “Integrated Wastewater Discharge Standard” (GB8978─1996). Sediment from stable industrial experiments was analyzed. The result shows that mercury in complexing sediment reaches 29.95% and low concentration of heavy metals in hydrolytic sediment makes it easier to dispose and treat.
Key words: acidic wastewater; biologics; complexing; hydrolyzation
