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首页> 外文期刊>Separation and Purification Technology >Simultaneous removal of 3d transition metals from multi-component solutions by activated carbons from co-mingled wastes
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Simultaneous removal of 3d transition metals from multi-component solutions by activated carbons from co-mingled wastes

机译：通过共混废物中的活性炭从多组分溶液中同时去除3d过渡金属

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摘要

The main purpose of the present work was to study the simultaneous removal of 3d transition metals from multi-component solutions by novel porous material obtained from carbon-containing liquid and solid waste. The activated carbon was prepared from co-mingled natural organic waste: 25% sunflower husks, 50% petroleum waste and 25% low-grade bituminous coal. The porous carbon material was obtained via stages of pre-oxidation with binary eutectic Na/K carbonates (in order to avoid melting and coke formation), followed by "step by step" carbonization at 100-400 °C in an inert atmosphere and activation with steam at 850 °C. The adsorption of the 3d transition metals: copper (II), cobalt (HI), nickel (II), iron (III), and chromium (III), on novel activated carbons has been investigated using multi-component model solutions. Experiments have been carried out on the thermodynamics of the simultaneous adsorption of the 3d transition metals in a static mode. The total metal removal combines the process of metal hydroxide precipitation in the solution with the metal cation adsorption on negatively charged carbon surface in a single operation unit. The carbon/metals interaction at the surface of spent adsorbents is discussed.
机译：本工作的主要目的是研究通过从含碳液体和固体废物中获得的新型多孔材料同时从多组分溶液中去除3d过渡金属。活性炭由混合的天然有机废料制成：25％的葵花壳，50％的石油废料和25％的低品位烟煤。多孔碳材料是通过以下步骤获得的：先用二元共晶碳酸钠/碳酸盐进行预氧化（以避免熔融和积碳），然后在惰性气氛中于100-400°C进行“逐步”碳化并活化用850°C的蒸汽加热。已经使用多组分模型解决方案研究了3d过渡金属：铜（II），钴（HI），镍（II），铁（III）和铬（III）在新型活性炭上的吸附。已经对静态吸附3d过渡金属同时吸附的热力学进行了实验。总金属去除量在单个操作单元中将溶液中金属氢氧化物的沉淀过程与金属阳离子在带负电荷的碳表面上的吸附结合在一起。讨论了废吸附剂表面的碳/金属相互作用。

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