Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, People's Republic of China.
College of Chemistry, Sichuan University, Chengdu, 610064, People's Republic of China.
Environ Sci Pollut Res Int. 2017 Oct;24(28):22321-22331. doi: 10.1007/s11356-017-9829-0. Epub 2017 Aug 11.
To develop a high-performance solid-phase extractant for the separation of uranyl f, pomelo peel, a kind of waste biomass, has been employed as carbon source to prepare carbonaceous matrix through low-temperature hydrothermal carbonization (200 °C, 24 h). After being oxidized by Hummers method, the prepared hydrothermal carbon matrix was functionalized with carboxyl and phenolic hydroxyl groups (1.75 mmol g). The relevant characterizations and batch studies had demonstrated that the obtained carbon material possessed excellent affinity toward uranyl (436.4 mg g) and the sorption process was a spontaneous, endothermic and rapid chemisorption. The selective sorption of U(VI) from the simulated nuclear effluent demonstrated that the sorbent displayed a desirable selectivity (56.14% at pH = 4.5) for the U(VI) ions over the other 11 competitive cations from the simulated industrial nuclear effluent. The proposed synthetic strategy in the present work had turned out to be effective and practical, which provides a novel approach to prepare functional materials for the recovery and separation of uranyl or other heavy metals from aqueous environment.
为了开发一种高性能的固相萃取剂来分离铀酰 f，柚子皮，一种废生物质，已被用作碳源，通过低温水热碳化（200°C，24 小时）来制备碳质基质。经过 Hummers 法氧化后，制备的水热碳基质被官能化，具有羧基和酚羟基（1.75mmol g）。相关的表征和批量研究表明，所得到的碳材料对铀酰具有优异的亲和力（436.4mg g），吸附过程是自发的、吸热的和快速的化学吸附。从模拟核废水中对 U(VI)的选择性吸附表明，该吸附剂在 pH=4.5 时对 U(VI)离子具有理想的选择性（56.14%），而对模拟工业核废水中的其他 11 种竞争阳离子的选择性较低。本工作提出的合成策略是有效和实用的，为从水环境中回收和分离铀酰或其他重金属提供了一种新的方法。
