AI Article Synopsis
- The study investigated the effectiveness of electrocoagulation (EC) using different electrodes (aluminum, iron, hybrid) on removing natural organic matter (NOM) from various water sources (commercial, terrestrial, natural).
- Results showed that the hybrid electrode achieved the lowest dissolved organic carbon (DOC) concentration of 5.05 mg L(-1) and a high UV-abs-254 removal efficiency of 92.4%.
- The EC process was effective across all NOM sources, with zeta potential and floc size analyzed to understand the destabilization and treatment efficiency, leading to significant color and DOC reductions.
Article Abstract
In this investigation, natural organic matters (NOM) of different origins (commercial, terrestrial and natural water) were treated by electrocoagulation (EC) process using aluminum, iron and hybrid electrodes. Electrode type effect on removal efficiency was observed for each NOM (commercial, terrestrial, and natural). The results were presented as dissolved organic carbon (DOC) (mg L(-1)) and UV/VIS absorbance (cm(-1)). The specific UV absorbance (SUVA) was determined before and after treatment of water. The lowest effluent concentration was obtained as 5.05 mg L(-1) with hybrid electrode for natural NOM source at its original pH 7.3. In addition, among the metal types, the best UV-abs-254 removal efficiency was obtained as 92.4% with 0.0312 cm(-1) by hybrid electrode at the end of the process. The color removal efficiency of water occurred successfully by Al and hybrid electrodes. Aquatic NOM source was the most resistant to EC treatment with DOC reduction of 71.1%, 59.8%, and 68.6% for Al, Fe and hybrid electrodes, respectively. Zeta potential and floc size of colloids were observed during the process for the determination of destabilization level of natural organic matters in EC process. Fast coagulation or flocculation and incipient instability were formed during electrolysis time for Al and Fe electrode, respectively. SUVA value was reduced to below 2 for three NOM sources studied. The EC process was shown to be a viable for different NOM sources with various metals.
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| http://dx.doi.org/10.1016/j.chemosphere.2014.11.063 | DOI Listing |
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