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首页> 外文期刊>Journal of Applied Polymer Science >Selective solid-phase extraction of metal for water decontamination
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Selective solid-phase extraction of metal for water decontamination

机译：用于水净化的金属的选择性固相萃取

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Metal-contaminated industrial effluent is a major concern for human health. Therefore, the removal of metal is of primary importance. In this study, metals were selectively extracted from water. Selective metal recovery was studied with a crown-ether-based polymer, wherein the selectivity was observed for strontium over lead. Parameters influencing the metal recovery, such as the contact time, adsorbent dosage, and metal-ion concentration, were evaluated. Interestingly, the adsorption rate of strontium was exponentially increased for the initial 4 h, and lead was adsorbed exponentially after 6 h. Notably, 98% strontium adsorption and 64% lead adsorption were obtained in 24 h. The Langmuir adsorption isotherm was in good agreement and demonstrated that the reactive sites of the adsorbent were homogeneous with monolayer metal adsorption with an adsorbent. The Freundlich adsorption isotherm was not obeyed by both metals. The pseudo-first-order and pseudo-second-order kinetics indicated that strontium was adsorbed by chemisorption and lead was adsorbed by physisorption. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 132, 42849.
机译：金属污染的工业废水是人类健康的主要问题。因此，去除金属是最重要的。在这项研究中，从水中选择性地提取了金属。用基于冠醚的聚合物研究了选择性金属的回收率，其中观察到锶对铅的选择性。评估了影响金属回收率的参数，例如接触时间，吸附剂用量和金属离子浓度。有趣的是，锶的吸附速率在最初的4小时内呈指数增长，而铅在6小时后呈指数增长。值得注意的是，在24小时内获得了98％的锶吸附和64％的铅吸附。 Langmuir吸附等温线吻合良好，证明了吸附剂的反应位点与单层金属吸附剂均相均匀。两种金属均未遵守Freundlich吸附等温线。拟一级和拟二级动力学表明，锶通过化学吸附而被吸附，铅通过物理吸附而被吸附。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，132，42849。

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