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  • Title: Optimising photoelectrocatalytic oxidation of fulvic acid using response surface methodology.
    Author: Fu J, Zhao Y, Wu Q.
    Journal: J Hazard Mater; 2007 Jun 01; 144(1-2):499-505. PubMed ID: 17137711.
    Abstract:
    In this paper, statistics-based experimental design with response surface methodology (RSM) was employed to investigate the effect of operation conditions on photoelectrocatalytic oxidation of fulvic acid (FA) using a Ti/TiO(2) electrode in a photoreactor. Initially, the Box-Behnken design was employed including the three key variables (initial pH, potassium peroxodisulphate (K(2)S(2)O(8)) and bias potential). Thereafter, the mutual interaction and effects between these parameters and optimum conditions were obtained in greater detail by means of SAS and Matlab software. The results of this investigation reveal that: (1) the regression analysis with R(2) value of 0.9754 shows a close fit between the experimental results and the model predictions; (2) three-dimension response surface plot can provide a good manner for visualizing the parameter interactions; (3) the optimum pH, K(2)S(2)O(8) and bias potential is found to be 3.8, 88.40 mg/L, 0.88 V, respectively, and the highest FA removal efficiency of 57.06% can be achieved.
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