Printing and dyeing wastewater with carcinogenicity,teratogenicity and mutagenicity,has become the main reason for environmental pollution.As wastewater enters in the environment,it poses a serious hazard to aquatic organisms,microorganisms and the health of human.In this paper,the magnetic ferrite NiFe_2O_4 was used as adsorbent to study the removal behavior of dye bright green(BG)and acid red(AR)in aqueous solution.The NiFe_2O_4 was characterized by SEM,XRD and FT-IR.The effect of calcination temperature ...