This study analyzed the effect of electrocoagulation cell construction on NOM removal from Finnish surface
water. Three types of cells were used in this research: one that only had aluminum electrodes, one
that had aluminum anodes and inert cathodes, and one that had inert anodes and aluminum cathodes.
Main water quality parameters such as TOC, apparent color, and concentrations of residual metals were
measured from the samples. A statistical model was made from the results using partial least squares
(PLSs) regression. According to the results, electrocoagulation was able to produce high quality water
with low NOM concentration. Lowest measured TOC concentration was 4.02 mg/l (78% removal). The
potential applications of water after the treatment could be potable water or industrial fresh water. Aluminum
originating from the anodes or cathodes had similar NOM removal efficiency. According to TOC
and f-Potential results, the mechanism of NOM removal was similar to chemical coagulation in different
pHs. It seems that in low pH, double layer compression was the main destabilization mechanism whereas
in higher pH, adsorption and bridging dominated.
This study analyzed the effect of electrocoagulation cell construction on NOM removal from Finnish surfacewater. Three types of cells were used in this research: one that only had aluminum electrodes, onethat had aluminum anodes and inert cathodes, and one that had inert anodes and aluminum cathodes.Main water quality parameters such as TOC, apparent color, and concentrations of residual metals weremeasured from the samples. A statistical model was made from the results using partial least squares(PLSs) regression. According to the results, electrocoagulation was able to produce high quality waterwith low NOM concentration. Lowest measured TOC concentration was 4.02 mg/l (78% removal). Thepotential applications of water after the treatment could be potable water or industrial fresh water. Aluminumoriginating from the anodes or cathodes had similar NOM removal efficiency. According to TOCand f-Potential results, the mechanism of NOM removal was similar to chemical coagulation in differentpHs. It seems that in low pH, double layer compression was the main destabilization mechanism whereasin higher pH, adsorption and bridging dominated.
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