Preparation and Application of Granulated Composite Materials of RectoriteWANG Hu-kun1,GONG Wen-qi2,JIE Wu1,CHEN Ling1 (1.Department of Chemistry and Environmental Engineering,Hubei Normal University,Huangshi 435002,China;2.School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China)The preparation technological conditions and regeneration method of granulated composite material of rectorite and the treatment of Cu2+-containing metallurgy industrial wastewater with them have been studied.The experimental results showed that under the conditions with the ratio of the water-quenched slag and rectorite of 1∶1,the amount of the additive(IS) of 10%,the amount of 50% water,and the roasting temperature of 400 ℃,the spallation loss ratio of granulated composite material prepared was 0.96%,its density was 1.06 kg/m3 and its porosity was 62.29%,with a water-absorption capacity of 58.82% and a compressive strength of 2.22 MPa.Under the conditions without adjusting the pH,the amount of the grain adsorbent of 0.05 g/mL,the reaction time of 40 minutes,and the adsorption temperature of 25 ℃,the efficiency for grain adsorbent to remove Cu2+ from metallurgy industrial wastewater was 98.2%,and the quality indexes of the wastewater after treatment conformed with the first grade of integrated wastewater discharge standard(GB8978—1996).The adsorption was fit for Freundlish isotherm:qe=1.06C0.47e.The thermodynamic sparameter was △H=-12.91 kJ/mol,△S=-29.14 J/(k·mol),△G=-4.21 kJ/mol respectively.The granulated composite material adsorbed saturately was regenerated with 1 mol/L sodium chloride(NaCl),and reused for six times,the residual concentration of Cu2+ was lower than the first level of GB8978—1996.A mass loss of 2.2% and a compressive strength loss of 4.05% showed that the effect of granulation was good.water-quenched slag;rectorite;granulation; adsorption;regeneration;Cu2+-containing metallurgy industrial wastewater