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首页> 外文会议>International Symposium on Biohydrometallurgy >Biosorptive flotation of copper ions from dilute solution using BSA-coated bubbles
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Biosorptive flotation of copper ions from dilute solution using BSA-coated bubbles

机译：使用BSA涂层泡沫从稀释溶液中生物定位浮选铜离子

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Copper adsorption was carried out using novel material known as air-filled emulsion (AFE). AFE is a stable colloidal system containing microscopic protein-coated bubbles (<10 μm) dispersed through an aqueous solution, resulting in an increased specific surface area and contact time between extractant and metal ions. BSA emulsion concentration had a significant impact on copper removal, and maximum metal uptake was obtained at 2.5 g/1 of BSA-coated bubbles. It was shown that copper sorption was rapid in the first 10 min, and equilibrium conditions reached within 40 min. In addition, separation of the copper-loaded microcells from the aqueous solution was probed. Column flotation, a common method used to float hydrophobic minerals, was employed to remove the microbubbles by means of attachment to the surface of larger air bubbles. In absence of a cationic surfactant, approximately 0.5% copper recovery was obtained at pH ranging from 5 to 8 due to the lack of hydrophobic groups on the surface of Cu-loaded BSA emulsions. A combination of collector and flocculant at a concentration of 3×10~(-4) M and 0.025 g/1, respectively, led to an increase in copper recovery to nearly 35% at pH 7.
机译：使用称为充气乳液（AFE）的新型材料进行铜吸附。 AFE是一种稳定的胶体系统，其含有微观蛋白质涂覆的泡沫（<10μm）分散通过水溶液，导致萃取剂和金属离子之间的比表面积和接触时间。 BSA乳液浓度对去除铜的浓度显着影响，并且在2.5g / 1的BSA涂覆的气泡中获得最大金属吸收。结果表明，在前10分钟内铜吸附快速，40分钟内达到平衡条件。此外，探测铜负载的微胶体与水溶液的分离。柱浮选，用于浮动疏水性矿物的常用方法，用于通过连接到较大气泡的表面上除去微泡。在不存在阳离子表面活性剂的情况下，由于Cu的BSA乳液表面上缺乏疏水基团，在5至8的pH值下获得约0.5％的铜回收。收集器和絮凝剂的组合分别为3×10〜（-4）m和0.025g / 1的浓度，导致铜回收率的增加至pH7的近35％。

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