锰改性石英砂的表征及其对水中三价锑的吸附性能初探

The Surface Features of Manganese Oxide Coated Sand(MOCS) and Preliminary Study of Its Adsorption Properties for Trivalent Antimony in Water

利用KMnO4溶液与浓盐酸的氧化还原反应制备了锰改性石英砂(MOCS)并对其表面性质进行了表征,结果表明MOCS表面氧化锰颗粒相互聚集呈较大的粒团,颗粒之间存在着大量的孔隙,确定了MOCS表面二氧化锰晶型为δ型,并证明了其表面含有大量的表面羟基和结合水。MOCS对原水中的Sb(Ⅲ)有良好的吸附性能,在100 mLSb(Ⅲ)浓度为100μg/L的溶液中,当反应条件为温度T=20℃,溶液pH=6.5,MOCS投量为3.0 g时,经过60 min后,MOCS对Sb(Ⅲ)的吸附反应即基本达到平衡,Sb(Ⅲ)去除率达到95%以上。

Use of oxidation-reduction reaction between KMnO4 solution and concentrated HC1 to prepare Manganese Oxide Coated Sand （MOCS） and which were characterized by their surface properties, the results show that the manganese oxide particles of MOCS surface gathered with each other is larger grain group, there are a large number of pores between the particles. Determine that the type of the MOCS surface manganese dioxide crystal is delta-type and that its surface contains a large number of surface hydroxyl groups and bound water is proved. The MOCS have good adsorption properties for the Sb（lll） in raw water, while T=20 ℃, pH=6.5, MOCS＇s dosage is 3.0 g, in 100 mLSb（IlI） concentration of 100μg/L solution, the adsorption reaction between MOCS and Sb（IlI） reach to equilibrium basically and the removal rate of Sb（Ill） get more than 95 % after 60 min.