(中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙410083)
摘 要: 針對(duì)鋅冶煉行業(yè)含高濃度多種重金屬的污酸特性，采用生物制劑配合-水解新工藝進(jìn)行處理，工業(yè)試驗(yàn)運(yùn)行過程中對(duì)污酸及處理后出水中各重金屬及氟、氯的濃度進(jìn)行監(jiān)測(cè)，并對(duì)產(chǎn)生的渣樣進(jìn)行分析。結(jié)果表明：重金屬濃度分別由汞14.78~56.70 mg/L、砷13.71~40.15 mg/L、鋅20.50~58.90 mg/L、鉛12.8~64.2 mg/L、鎘2.1~13.6 mg/L、銅0.54~1.44 mg/L、氟339~512 mg/L、氯472~3400 mg/L脫除至汞0.029~0.049 mg/L、砷0.029~0.065 mg/L、鋅0.11~0.37 mg/L、鉛0.1~0.43 mg/L、鎘低于0.01 mg/L、銅低于0.1 mg/L、氟0.054~4.99 mg/L、氯29.5~43.7 mg/L，處理后出水中各重金屬含量及氟、氯含量均遠(yuǎn)低于《污水綜合排放標(biāo)準(zhǔn)》(GB8978—1996)。配合渣中的汞含量高達(dá)29.95%，可作為汞原料進(jìn)行回收，水解渣中重金屬含量低，便于妥善處理和處置。
關(guān)鍵字: 污酸；生物制劑；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
