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Surface response methodology was involved in the optimization of Cr(VI) adsorption upon chitosan flakes against the process parameters pH, adsorbent dose and initial Cr(VI) concentration. The effects of these factors were studied in the ranges 1.5–9.5, 1.8–24.2gl −1 and 15–95mgl −1 , respectively. A predictive quadratic model was constructed by variance analysis of data obtained from...
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