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首页> 外文期刊>Separation and Purification Technology >Electrocoagulation of arsenic using iron nanoparticles to treat copper mineral processing wastewater
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Electrocoagulation of arsenic using iron nanoparticles to treat copper mineral processing wastewater

机译：铁纳米粒子电凝处理铜矿选矿废水中的砷

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The arsenic content in wastewater is of major concern in copper mineral processing. Typically, a complex wastewater treatment is needed with a combination of chemical and physical processes. Electrocoagulation (EC) has shown its potential for arsenic removal due to the formation of ferric hydroxide-arsenate precipitates but the acidic conditions in the wastewater disfavours the hydroxide formation. This work evaluates the feasibility of EC combined with addition of zero valent iron nanoparticles in the treatment process. The results showed that copper smelter wastewater could be treated efficiently with EC and presence of nanoparticles. Thetreatment with EC or nanoparticles alone was less efficient. Increasing the concentration of nanoparticles during EC did not increase the efficiency accordingly. The arsenic removal was favoured by an increase of the current density during EC but only until a limiting current density; thereafter the anodes got partly passivated.
机译：废水中的砷含量是铜矿选矿中的主要问题。通常，需要结合化学和物理过程的复杂废水处理。电凝（EC）已显示出其去除砷的潜力，这是因为形成了氢氧化铁-砷酸盐沉淀，但是废水中的酸性条件不利于氢氧化物的形成。这项工作评估了在治疗过程中加入零价铁纳米粒子与EC结合的可行性。结果表明，使用EC和存在纳米颗粒可以有效地处理铜冶炼厂废水。单独使用EC或纳米颗粒的治疗效率较低。 EC期间增加纳米颗粒的浓度并没有相应地提高效率。在EC期间电流密度的增加有利于砷的去除，但是直到达到极限电流密度时才如此。之后，阳极被部分钝化。

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