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首页> 外文期刊>RSC Advances >Facile synthesis of novel 3D flower-like magnetic La@Fe/C composites from ilmenite for efficient phosphate removal from aqueous solution
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Facile synthesis of novel 3D flower-like magnetic La@Fe/C composites from ilmenite for efficient phosphate removal from aqueous solution

机译：从伊尔梅钛矿中的新型3D花样磁La @ Fe / C复合材料的容纳合成，从水溶液中去除磷酸盐

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In this study, a novel 3D flower-like La@Fe/C magnetic composite was successfully synthesized by carbothermal reduction of ilmenite via microwave radiation. The physico-chemical properties of the composite were investigated. The results showed that La@Fe/C features a 3D flower-like morphology with an S-BET and V-mic of 114 m(2) g(-1) and 0.017 cm(3) g(-1), respectively. Zerovalent iron and metal oxides were detected by XRD and XPS on the surface of the adsorbent, which formed as a result of carbothermal reduction of ilmenite using coconut shell-based carbon followed by the introduction of lanthanum. This resultant magnetic La@Fe/C exhibited remarkable phosphate selectivity performance even in the presence of a 50-fold excess of competing ions, which is superior to the pristine ilmenite and coconut activated carbon. Adsorption isotherms and adsorption kinetics fitted well with the Langmuir model and pseudo-second-order model, respectively. A thermodynamic study indicated that the adsorption of phosphate was spontaneous and endothermic. The adsorption-regeneration cyclic experiments of the La@Fe/C composite demonstrated a good level of recyclability. These results indicated that carbothermal reduction of ilmenite followed by the introduction of lanthanum could result in highly efficient and recoverable magnetic particles for the removal of phosphate from wastewater.
机译：在本研究中，通过微波辐射通过硅沸石的Carbothotmal降低成功地合成了一种新型的3D花样La @ Fe / C磁性复合物。研究了复合物的物理化学性质。结果表明，LA @ Fe / C分别具有3D花样形态，S-Bet和114m（2 )g（-1）和0.017cm（3 )g（-1）的V-MIC。通过吸附剂表面上的XRD和XPS检测Zeropalent铁和金属氧化物，其由于使用椰壳壳的碳酸纤维素的含量降低而形成，然后引入镧。即使在存在50倍的竞争离子的情况下，该得到的磁力La @ Fe / C也表现出显着的磷酸盐选择性性能，其优于原始的Ilmenite和椰子活性炭。吸附等温线和吸附动力学与Langmuir模型和伪二阶模型很好。热力学研究表明，磷酸盐的吸附是自发性和吸热的。 La @ Fe / C复合材料的吸附 - 再生循环实验表明了良好的可回收性水平。这些结果表明，ILMENITE的肉热量减少，然后引入镧可能导致高效可回收的磁性颗粒用于从废水中除去磷酸盐。

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    《RSC Advances》 |2019年第49期|共11页
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  • 正文语种 eng
  • 中图分类 化学;
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