摘要：目前,硫化矿是贵金属的主要来源。在硫化矿处理过程中存在的主要问题之一是其在酸中的溶解度低(K_(sp)<10^(-20)),并产生有毒有害的副产品。在本研究中,使用高锰酸铝[Al(MnO_(4))_(3)]氧化剂溶解硫化矿来提取金属,部分解决了这个问题。基于Aspen Hysys模型组装的Taguchi实验设计作为一种从实验到工业规模的新方案,已应用于Al(MnO_(4))_(3)氧化剂对硫化物矿石的溶解研究。最佳结果已被用作Aspen Hysys软件对该过程进行模拟和灵敏度分析的主要数据。研究了pH、停留温度、搅拌速率、停留时间、Al(MnO_(4))_(3)消耗量、浸出密度、粒度和氧压等参数对从硫化矿中萃取金属效率的影响。在优化条件下,锌、铜和铅的萃取率分别达到77%、73%和70%。

摘要：A new ion-imprinted polymer （liP） was synthesized by copolymerization of 4-vinylpyridine （monomer）, ethyleneglycoldimethacrylate （cross-linker） and 2,2-azobis-isobutyronitrile （initiator） in the presence of Cd2＋ and quinaldic acid （complexing agent）. It was found that the adsorption capacity of IIP and blank polymer were 45.0 and 6.2 mg g-l, respectively. The relative selectivity coefficients of the imprinted polymer for different binary mixture were also calculated. Compared to non-imprinted polymer （NIP）, the IIP had higher selectivity for Cd（II）. The IIP was used as a sorbent for cadmium extraction from water samples by using a simple batch extraction procedure. The effect of different parameters on Cd2＋ extraction and its recovery from the IIP were evaluated and optimized by using experimental design methodology. The optimized adsorption/desorption procedure was applied for cadmium removal from the real water samples. The obtained recoveries proved that this IIP could be used for removal of trace cadmium ions from water samples.