Effects of combined Fe-Al electrodes and groundwater temperature on arsenic removal by electrocoagulation

IF 0.5 4区环境科学与生态学 Q4 ENGINEERING, ENVIRONMENTAL

Environment Protection Engineering Pub Date : 2019-01-01 DOI:10.37190/epe190201

E. Mohora, S. Rončević, J. Agbaba, Kristiana Zrnić, A. Tubić, Mesud Adžemović, B. Dalmacija

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引用次数: 4

Abstract

The removal of arsenic from groundwater by continuous electrocoagulation (EC) using combined Fe-Al electrodes at its natural temperature (16.1±0.2 °C) was comprehensively evaluated. The results obtained indicated that all studied Fe-Al electrode combinations were able to reduce As concentration below 10 μg/dm3. Nevertheless, the Fe-Fe-Al-Fe electrode combination was the most suitable due to its highest arsenic removal capacity (0.354 μg As/C) for the lowest charge loading 68.4 C/dm3. The specific consumption of Fe was 0.0339 kg Fe/m3 and of Al electrodes 0.0145 kg Al/m3. The operating cost was estimated at 0.182 €/m3. The increase of the groundwater temperature by 8 °C from its natural temperature influenced increase of the Fe and Al electrodes dissolution rate by 30% and 17%, respectively and that of As removal efficiency by 16%. The residual Fe and Al concentrations in 500 dm3 of treated groundwater were below WHO guideline values for drinking water. Long-term field operation of the pilot-scale continuous EC reactor is required to validate effectiveness, reliability and robustness of the EC technique for arsenic removal from groundwater confirmed in laboratory conditions.

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铁铝复合电极与地下水温度对电絮凝除砷的影响

综合评价了Fe-Al复合电极在自然温度(16.1±0.2℃)下连续电絮凝(EC)对地下水中砷的去除效果。结果表明，所研究的Fe-Al电极组合均能将砷浓度降低到10 μg/dm3以下。而Fe-Fe-Al-Fe电极组合在最低电荷负荷为68.4 C/dm3的情况下，具有最高的除砷能力(0.354 μg As/C)，是最合适的电极组合。铁的比耗为0.0339 kg Fe/m3，铝电极的比耗为0.0145 kg Al/m3。运营成本估计为0.182欧元/立方米。当地下水温度比自然温度升高8℃时，Fe和Al电极的溶解速率分别提高30%和17%，As的去除效率提高16%。500 dm3处理过的地下水中残余铁和铝浓度低于世卫组织饮用水指导值。需要中试规模连续EC反应器的长期现场运行，以验证EC技术在实验室条件下确认的地下水砷去除的有效性、可靠性和稳健性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environment Protection Engineering 环境科学-工程：环境

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

12 months

期刊介绍： Water purification, wastewater treatment, water reuse, solid waste disposal, gas emission abatement, systems of water and air pollution control, soil remediation.