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首页> 外文期刊>Canadian Journal of Civil Engineering >Utilization of zeolite industrial wastewater for removal of copper and zinc from copper-brass pipe industrial wastewater
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Utilization of zeolite industrial wastewater for removal of copper and zinc from copper-brass pipe industrial wastewater

机译：利用沸石工业废水去除铜黄铜管工业废水中的铜和锌

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Utilization of zeolite industrial wastewater as a sorbent and (or) precipitant to remove Cu and Zn from copper-brass pipe industrial wastewater was conducted. These wastewaters were sampled and values for pH, temperature, biochemical oxygen demand (BOD_5), chemical oxygen demand (COD), total solids (TS), total dissolved solids (TDS), total suspended solids (TSS), and heavy metals were determined. In addition, the sorption isotherms of Cu and Zn in copper-brass pipe industrial wastewater onto solids of zeolite industrial wastewater at various dilutions of copper-brass pipe industrial wastewater were explored. The relationship between Cu and Zn concentrations and their removal efficiencies under different conditions of wastewater pH, contact times, and ratios between copper-brass pipe industrial wastewater and zeolite industrial wastewater was examined. Zeolite industrial wastewater contained various carbonate compounds that contributed to high pH and TDS values, and low heavy metals contamination whereas copper-brass pipe industrial wastewater had a low pH value and was contaminated with heavy metals, especially Cu and Zn. Application of zeolite industrial wastewater significantly increased the pH of copper-brass pipe industrial wastewater and consequently removed Cu and Zn. The increase in pH of the wastewater mixture significantly enhanced the heavy metals removal. The Langmuir equation described sorption isotherms of Cu and Zn onto solids of zeolite industrial wastewater at neutral pH (6-7) while the Freundlich equation fitted well at pH > 12. The maximum Cu (97 percent -98 percent ) and Zn (92 percent -96 percent ) removal efficiencies occurred at the original pH 12.8 of zeolite industrial wastewater, at the ratio of copper-brass pipe industrial wastewater to zeolite industrial wastewater 3:1 (vol.rvol.) and at 30 min contact time.
机译：利用沸石工业废水作为吸附剂和（或）沉淀剂从铜黄铜管工业废水中去除铜和锌。对这些废水进行采样，并确定pH，温度，生化需氧量（BOD_5），化学需氧量（COD），总固体（TS），总溶解固体（TDS），总悬浮固体（TSS）和重金属的值。此外，还研究了铜，铜管工业废水中各种浓度的铜，铜在铜沸石管工业废水中对铜和锌的吸附等温线。研究了铜，锌管工业废水与沸石工业废水在不同pH值，接触时间，铜黄铜管工业废水与沸石工业废水的比值条件下Cu，Zn浓度与去除率之间的关系。沸石工业废水中含有多种碳酸盐化合物，有助于提高pH值和TDS值，降低重金属污染;而铜黄铜管工业废水的pH值低，并被重金属尤其是Cu和Zn污染。沸石工业废水的应用显着提高了铜黄铜管工业废水的pH值，因此去除了Cu和Zn。废水混合物pH值的增加显着提高了重金属的去除率。 Langmuir方程描述了在中性pH（6-7）下沸石工业废水的固体上Cu和Zn的吸附等温线，而pH> 12时Freundlich方程很好地拟合。最大Cu（97％-98％）和Zn（92％）在沸石工业废水的原始pH为12.8，铜黄铜管工业废水与沸石工业废水的比例为3：1（vol.rvol。）且接触时间为30分钟时，去除效率达到-96％。

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