Abstract: The acid leaching residue of asbestos tailing was pretreated by calcination, and the adsorption capability of calcined acid leaching residue of asbestos tailing to Cu2+ was studied. The x potential of acid leaching residue of asbestos tailing was mensurated, the unadsorbed and adsorbed Cu2+ acid leaching residues of asbestos tailing were characterized by SEM, TEM and FT-IR spectra, and the adsorption mechanism of acid leaching residue was discussed. The results showed that the isoelectric point of acid leaching residue of asbestos tailing was 2.03, the removal effect of Cu2+ was optimal when the quantity of adsorbent was 3 g/L, adsorption time 60 min, adsorption temperature 25℃, and pH value of solution 4.85. The model of isothermal adsorption accorded with Langmuir equation, which was chemical adsorption, the adsorption isotherm was Ce/q=0.0749Ce+0.1076. The adsorption mechanism of acid leaching residue to Cu2+ could be explained by both adsorption of surfacial coordination and ion exchange.

Key words: acid leaching residue of asbestos tailing, calcination, adsorption, Cu2+

摘要： 对石棉尾矿酸浸渣进行了焙烧处理，考察了焙烧后的石棉尾矿酸浸渣对溶液中Cu2+的吸附性能，测定了其表面x电位，对吸附Cu2+前后的石棉尾矿酸浸渣进行了表征，探讨了吸附机理. 结果表明，石棉尾矿酸浸渣的等电点为2.03；石棉尾矿酸浸渣用量3 g/L、吸附时间60 min、吸附温度25℃、溶液pH值4.85时，该渣对Cu2+的吸附效果最佳. 石棉尾矿酸浸渣对Cu2+的等温吸附符合Langmuir方程，为化学吸附，其吸附等温式为Ce/q=0.0749Ce+0.1076，主要为表面配位吸附和离子交换吸附.

关键词: 石棉尾矿酸浸渣, 焙烧, 吸附, Cu2+