The composite flocculant was prepared by polymerizing CPAM(a cationic flocculant P:acrylamide-methacryloxyethyltrimethyl ammonium chloride-acryloxyethyltrimethyl ammonium chloride)and PFAS(polymeric aluminum ferric sulfate).The morphological distribution of Fe and Al was studied by using Ferron analysis
and the morphology of the copolymer was observed using scan electron microscopy.The Box-Behnken mathematical relational model between CODCr removal rate and affecting factors was established
and the technique composing PAFS-CPAM was optimized.The optimum synthesis conditions were: react temperature 61℃
react time 74 min
and Fe/CPAM mass ratio 28
respectively.At these optimized conditions and using 50 mg·L-1 PAFS-CPAM flocculant prepared
CODCr removal and turbidity removal rates were 80.86% and 97.50%