Microwave-assisted hydrothermal synthesis of carbon doped with phosphorus for uranium(VI) adsorption
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Microwave‑assisted hydrothermal synthesis of carbon doped with phosphorus for uranium(VI) adsorption Lan Liu1,2 · Xiaoyan Lin1,2 · Mengsha Li1 · Huanhuan Chu1,2 · Hongyi Wang1 · Yu Xie1,2 · Zhichen Du4 · Meijuan Liu1 · Lili Liang1,2 · Hongying Gong1,2 · Jian Zhou2 · Zhanguo Li3 · Xuegang Luo2 Received: 30 June 2020 / Accepted: 7 October 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract In this study, hydrothermal carbon doped with phosphorus using phytic acid (PA) and Sodium tripolyphosphate as functional monomers was successfully synthesized by the hydrothermal route combined with microwave-assisted hydrothermal carbon as matrix material. The uranium(VI) adsorption capacity by phytic acid functionalized microwave-assisted hydrothermal carbon (MHC-PA) was up to 382.2 mg/g at pH of 6.0 and the temperature of 298.15 K. The adsorption mechanism of uranium(VI) onto the MHC-PA was mainly the chelation of P=O, P–OH functional group and uranium(VI), which improves the selective adsorption performance of MHC-PA for uranium(VI). Keywords Functionalization · Microwave-assisted hydrothermal carbon · Adsorption · Uranium · Adsorbent
Introduction With the continuous development and utilization of nuclear energy, more and more uranium-containing radioactive wastewater is produced [1]. The discharge of uraniumcontaining wastewater into nature will cause immeasurable harm to the environment on which human beings depend. Today, this practice is even more undesirable when environmental protection issues are increasingly emphasized. Therefore, the treatment of uranium in uranium-containing wastewater has become an urgent problem [2].
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10967-020-07453-6) contains supplementary material, which is available to authorized users. * Xiaoyan Lin [email protected] 1
School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
2
Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang 621010, Sichuan, China
3
State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
4
College of Materials Science and Engineering, Jilin University, Changchun, China
Compared with the main methods of treating uraniumcontaining wastewater, such as ion exchange [3], membrane [4], and adsorption [5–8], adsorption method is widely used in the treatment of uranium-containing wastewater in nuclear industry and other fields because of its simple preparation method, low cost and good treatment effect [9]. However, adsorption methods put forward higher requirements for the properties of adsorbents, such as: excellent acid–alkali resistance and thermal stability. For these reasons, carbon materials have become an ideal adsorbent [10]. The synthesis of carbon materials has a history of more than 3000 years since carbon black was synthesized. Among many synthesis methods, hydrothermal method has the advantages of simple operation conditions, l
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