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首页> 外文期刊>Journal of Environmental Management >Simultaneous arsenic and fluoride removal from synthetic and real groundwater by electrocoagulation process: Parametric and cost evaluation
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Simultaneous arsenic and fluoride removal from synthetic and real groundwater by electrocoagulation process: Parametric and cost evaluation

机译：通过电凝工艺同时去除合成地下水和实际地下水中的砷和氟：参数和成本评估

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摘要

Co-existence of arsenic and fluoride in groundwater has raised severe health issues to living being. Thus, the present research has been conducted for simultaneous removal of arsenic and fluoride from synthetic groundwater by using electrocoagulation process with aluminum electrode. Effects of initial pH, current density, run time, inter electrode distance and NaCl concentration over percentage removal of arsenic and fluoride as well as operating cost have been studied. The optimum experimental conditions are found to be initial pH: 7, current density: 10 A/m~2, run time: 95 min, inter electrode distance: 1 cm, NaCl concentration: 0.71 g/l for removal of 98.51% arsenic (initial concentration: 550 μg/l) and 88.33% fluoride (initial concentration: 12 mg/l). The concentration of arsenic and fluoride in treated water are found to be 8.19 μg/1 and 1.4 mg/1, respectively, with an operating cost of 0.357 USD/m~3 treated water. Pseudo first and second order kinetic model of individual and simultaneous arsenic and fluoride removal in electrocoagulation have also been studied. Produced sludge characterization studies also confirm the presence of arsenic in As(III) form, and fluoride in sludge. The present electrocoagulation process is able to reduce the arsenic and fluoride concentration of synthetic as well as real groundwater to below 10 ug/1 and 1.5 mg/1, respectively, which are maximum contaminant level of these elements in drinking water according to WHO guidelines.
机译：地下水中砷和氟化物的共存给人类带来了严重的健康问题。因此，已经进行了本研究以通过使用铝电极的电凝工艺同时从合成地下水中去除砷和氟化物。研究了初始pH，电流密度，运行时间，电极间距离和NaCl浓度对去除砷和氟的百分比以及运行成本的影响。发现最佳实验条件为初始pH：7，电流密度：10 A / m〜2，运行时间：95分钟，电极间距离：1 cm，NaCl浓度：0.71 g / l，用于去除98.51％的砷（初始浓度：550μg/ l）和88.33％的氟化物（初始浓度：12 mg / l）。处理水中的砷和氟的浓度分别为8.19μg/ 1和1.4 mg / 1，运行成本为0.357 USD / m〜3处理水。还研究了电凝中单个和同时去除砷和氟化物的伪一阶和二阶动力学模型。产生的污泥特性研究也证实了砷（As）（III）形式的砷和污泥中的氟化物的存在。当前的电凝方法能够将合成地下水和实际地下水中的砷和氟的浓度分别降低至10 ug / 1和1.5 mg / 1以下，这是根据WHO准则在饮用水中这些元素的最大污染物水平。

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