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首页> 外文期刊>Pollution research >DEFLUORIDATION OF DRINKING WATER IN BATCH AND CONTINUOUS-FLOW ELECTROCOAGULATION SYSTEMS
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DEFLUORIDATION OF DRINKING WATER IN BATCH AND CONTINUOUS-FLOW ELECTROCOAGULATION SYSTEMS

机译：间歇和连续流电凝结系统中的饮用水除氟

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摘要

The objective of this study was to evaluate fluoride removal from drinking water using electrocoagulation (EC) in batch or continuous-flow reactors under different operating conditions. Effects of varying applied voltage, initial concentration and initial pH on fluoride removal efficiencies were evaluated using mild steel electrodes. Results for distilled water and ground water were compared. Maximum F removal efficiencies from distilled water were 84.9 % and 79.4% in batch and continuous mode, respectively for the highest applied voltage of 25 V. Removal efficiencies from ground water were 79.6% and 28.7% in batch and continuous mode, respectively. At low F concentrations of 10 mg/L and initial pH ranging from 5 to 10, the final pH ranged from 6.35 to 7.96, highlighting the advantage of EC over conventional coagulation for drinking water treatment. Maximum F removal efficiency of 84.9% was observed at an initial pH of 6.42. Increasing fluoride concentrations from 20 mg/L to 50 mg/L resulted in an increase in pH irrespective of the applied voltage. As expected, an increase in initial F concentrations resulted in decreased F removal efficiencies. These results demonstrate the importance of initial F concentrations on both, final pH of the treated water and F removal efficiencies.
机译：这项研究的目的是评估在不同操作条件下在间歇或连续流反应器中使用电凝（EC）从饮用水中去除氟化物的方法。使用低碳钢电极评估了施加电压，初始浓度和初始pH值变化对除氟效率的影响。比较蒸馏水和地下水的结果。在最高25 V的施加电压下，间歇和连续模式下从蒸馏水中去除F的最大效率分别为84.9％和79.4％。间歇和连续模式下从地下水中去除F的效率分别为79.6％和28.7％。在10 mg / L的低F浓度和5到10的初始pH值下，最终pH值在6.35到7.96范围内，突出了EC在饮用水处理中优于常规混凝的优势。在初始pH为6.42时，观察到最大的F去除效率为84.9％。氟化物浓度从20 mg / L增加到50 mg / L导致pH值增加，而与施加的电压无关。不出所料，初始F浓度的增加导致F去除效率降低。这些结果证明了初始F浓度对处理后的水的最终pH值和F去除效率的重要性。

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