3. Results and discussion
3.1. RSM model quality
According to R2 values of the model responses (Table 2) all models
explain the variance of final pH, apparent color, TOC, f-Potential,
dissolved Al, and residual Al and Fe with high accuracy
(R2 > 0.8). Lower R2 values were obtained for turbidity and residual
Mn with Cell C. According to Q2 values of the model responses, the
predictive ability of the model made for Cell C is significantly lower
than the predictive ability of the models made for Cells A + C and
Cell A. This can be due to the mechanism of aluminum dissolving
from the cathodes, which does not behave linearly at the initial
stage of the electrocoagulation process.
3. Results and discussion3.1. RSM model qualityAccording to R2 values of the model responses (Table 2) all modelsexplain the variance of final pH, apparent color, TOC, f-Potential,dissolved Al, and residual Al and Fe with high accuracy(R2 > 0.8). Lower R2 values were obtained for turbidity and residualMn with Cell C. According to Q2 values of the model responses, thepredictive ability of the model made for Cell C is significantly lowerthan the predictive ability of the models made for Cells A + C andCell A. This can be due to the mechanism of aluminum dissolvingfrom the cathodes, which does not behave linearly at the initialstage of the electrocoagulation process.
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