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Arsenic Removal and Its Chemistry in Batch Electrocoagulation Studies
Journal of Environmental Science & Engineering
|November 14, 2015
Summary
Electrocoagulation (EC) effectively removes arsenic (As) from water, outperforming light and aeration. This study optimized EC for arsenic removal, achieving up to 97% efficiency in distilled water.
Area of Science:
- Environmental Science
- Water Treatment Technologies
- Inorganic Chemistry
Background:
- Arsenic contamination in water poses significant health risks.
- Oxidation and removal of arsenic (As) (III) are critical for water purification.
- Conventional methods for arsenic removal often require optimization.
Purpose of the Study:
- To evaluate the efficacy of electrocoagulation (EC), light, and aeration as oxidizing agents for As (III) removal.
- To assess the impact of initial pH on arsenic removal efficiency using EC.
- To compare the performance of EC against light and aeration for arsenic remediation.
Main Methods:
- Arsenic (III) solutions were prepared using distilled water and groundwater.
- Arsenic removal was investigated in an EC batch reactor under varying conditions.
- The influence of initial pH on As removal efficiency was systematically studied.
Main Results:
- Electrocoagulation (EC) combined with light and aeration achieved maximum As (III) removal efficiencies of 97% (distilled water) and 71% (groundwater).
- EC alone demonstrated significant arsenic removal (90% in distilled water, 53.6% in groundwater).
- Light and aeration without EC showed limited arsenic removal (26-29%), highlighting the superiority of EC.
Conclusions:
- Electrocoagulation is a highly effective method for oxidizing and removing arsenic from water.
- The optimal initial pH for arsenic removal via EC was found to be 7 for both distilled water and groundwater.
- The EC process demonstrates a tendency towards near-neutral pH during arsenic removal operations.
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