Recovery of Inorganic Phosphorus Using Copper-Substituted ZSM-5
Recovery of Inorganic Phosphorus Using Copper-Substituted ZSM-5
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DOI：
10.1021/acssuschemeng.7b01127
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发表时间：
2017-06
影响因子：
8.4
通讯作者：
Michael J. Manto;Pengfei Xie;Michael A. Keller;Wilhelm E. Liano;Tiancheng Pu;Chao Wang
中科院分区：
文献类型：
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作者：
Michael J. Manto;Pengfei Xie;Michael A. Keller;Wilhelm E. Liano;Tiancheng Pu;Chao Wang
从水溶液中高效且经济有效地分离磷（P）在应对可持续性挑战方面具有重要价值。它不仅减轻了农业径流中磷酸盐造成的污染，而且还为磷基化学品和肥料的生产提供了可再生资源。在这里，我们报告使用铜取代的沸石，Cu-ZSM-5，作为吸附剂用于回收P。磷酸根阴离子的快速捕获和释放被证明与>90%的回收效率分别使用合成溶液Na 2 HPO 4和NaCl。沸石吸附剂也被发现是可回收的，并在多次捕获-释放循环后维持高回收效率。铜（II）物种的沸石被确定为阴离子吸附的活性位点，并基于这一发现的配体交换机制提出了捕获和释放磷。
Efficient and cost-effective separation of phosphorus (P) from aqueous solutions possesses great value in addressing the challenges in sustainability. Not only does it mitigate the pollution caused by phosphate in agricultural runoffs, but it also provides a renewable source for production of phosphorus-based chemicals and fertilizes. Here we report on the use of copper-substituted zeolites, Cu-ZSM-5, as sorbents for recovery of P. Fast capture and release of phosphate anions are demonstrated with >90% efficiency of recovery using synthetic solutions of Na2HPO4 and NaCl, respectively. The zeolite sorbents are also found to be recyclable and sustain high recovery efficiencies after multiple capture–release cycles. Cu(II) species in the zeolites are identified to be the active sites for anion adsorption, and based on this finding a ligand exchange mechanism is proposed for the capture and release of phosphorus.