Enhanced uranium uptake from acidic media achieved on a novel iron phosphate adsorbent
Enhanced uranium uptake from acidic media achieved on a novel iron phosphate adsorbent
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新型磷酸铁吸附剂增强了酸性介质中的铀吸收
DOI：
10.1016/j.cej.2021.130267
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发表时间：
2021
影响因子：
15.1
通讯作者：
Ding Jie
中科院分区：
文献类型：
--
作者：
Pan Ning;Tang Jiao;Hou Dezhi;Lei Hao;Zhou Daohui;Ding Jie
将磷酸前驱体合成和共沉淀法相结合，开发了一种工艺简单、工艺可重复、经济成本低的磷酸铁(FeYPz)合成方法。该过程首先合成掺磷碳点(PCD)，然后在Fe3O4的制备条件下引入PCD。有趣的是，FeyPz对铀(VI)的吸附容量受FeYPz合成条件的影响很大，通过调节FeyPz的官能团和结构可以获得最佳的吸附性能。与FePO4、٠2H2O和Fe3O4相比，FeYPz-10对U(VI)的吸收性能分别提高了3561%和684.5%。在pH值为4.5时，用朗缪尔模型计算的FeYPz-10的最大吸附容量可达1.22mmolg−1，与用Thomas模型计算的饱和吸附容量0.87mmolg−1相当，高于已报道的一些吸附剂的饱和吸附容量。此外，该吸附剂具有较好的重复使用性能，在5次循环后仍能保持较高的吸附容量。XPS分析表明，FeyPz-10对U(VI)的优异吸附能力主要归因于FePz-10上Fe2+向Fe3+的转化，导致U(VI)的还原。
By combining phosphoric acid precursor synthesis and co-precipitation method, we developed a facile approach for synthesizing iron phosphate (FeyPz) with repeatable technique and low economic cost. The procedure begins with synthesis of P-doped carbon dot (pCD), followed by introducing the pCD in the preparation condition of Fe3O4. Interesting, the uranium(U(VI)) adsorption capacity of FeyPzis significantly influenced by the synthesis conditions of FeyPzand the optimized performance can be achieved by tuning the functional groups and structure of FeyPz. Compared to the FePO4٠2H2O and Fe3O4, the FeyPz-10 showed 3561% and 684.5% enhanced performance in U(VI) uptake, respectively. The maximum adsorption capacity of FeyPz-10 based on Langmuir model could reach up to 1.22 mmol g−1at pH 4.5, which was comparable with the saturated adsorption capacity based on Thomas model with its value of 0.87 mmol g−1, that was higher than some of adsorbents reported previously. In addition, the adsorbent had a superior reusability and still kept up high adsorption capacity for U(VI) after 5th cycle. Moreover, an adsorption-reduction mechanism was proposed and XPS analysis confirmed the outstanding adsorption capacity for U(VI) on the adsorbent was mainly ascribed to the transformation of Fe2+to Fe3+on FeyPz-10 that results in U(VI) reduction.
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影响因子：
13.6
作者：
Yiqing Zeng;Wang Song;Yanan Wang;Shule Zhang;Tianxiao Wang;Q. Zhong
通讯作者：
Yiqing Zeng;Wang Song;Yanan Wang;Shule Zhang;Tianxiao Wang;Q. Zhong
一种含磷酸的自组装超分子材料，用于从酸性溶液中超快速有效地捕获铀
影响因子：
8.4
作者：
Pan Ning;Jin Yongdong;Wang Xiaoqiang;Hu Xiaoping;Chi Fangting;Zou Hao;Xia Chuanqin
通讯作者：
Xia Chuanqin
影响因子：
8.6
作者：
I. Smičiklas;S. Milonjić;P. Pfendt;S. Raičević
通讯作者：
I. Smičiklas;S. Milonjić;P. Pfendt;S. Raičević
影响因子：
--
作者：
Aslamkhan, AG;Aslamkhan, A;Ahearn, GA
通讯作者：
Ahearn, GA
影响因子：
16.6
作者：
Yuan Y;Liu T;Xiao J;Yu Q;Feng L;Niu B;Feng S;Zhang J;Wang N
通讯作者：
Wang N