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把经过酸改性、热改性以及复合改性的麦饭石分别用于处理自来水,通过考察经改性麦饭石处理前后自来水中Cu、Mn、Zn和Pb离子浓度的变化,研究了酸浓度、热改性温度以及复合改性条件对麦饭石的溶出性及吸附性的影响;测定了改性麦饭石的溶出及吸附透过曲线。结果表明热改性和盐酸改性对麦饭石的离子交换性能有促进作用:先用1.5 mol/L的盐酸改性,再经400℃热改性的麦饭石可以除去自来水中81.9%的Pb,并使水中Zn的浓度增加0.132 mg/L;在200 m L/min流速下,60 g改性麦饭石,可以有效优化自来水8 h,平衡时间约为12 h。
The acid-modified, heat-modified and composite modified maifanite were used to treat tap water. The changes of Cu, Mn, Zn and Pb ion concentrations in tap water before and after the modified maifanite treatment were investigated. Concentration, thermal modification temperature and composite modification conditions on the dissolution and adsorption of Maifan stone; Determination of the dissolution of the modified Maifan stone and adsorption through the curve. The results showed that the thermal modification and hydrochloric acid modification promoted the ion exchange ability of medical stone. The first modified with hydrochloric acid at 1.5 mol / L and the thermal modified at 400 ℃ could remove 81.9% Pb, and the concentration of Zn in water increased by 0.132 mg / L. With the flow rate of 200 m L / min, 60 g modified maifanite could effectively optimize tap water for 8 h and the equilibrium time was about 12 h.