\r那 平，孙千益，李呈呈，韩晴玉，王榕静，李 萌，吕慧芸\r
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AuthorsHTML:\r那 平，孙千益，李呈呈，韩晴玉，王榕静，李 萌，吕慧芸\r
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AuthorsListE:\rNa Ping，Sun Qianyi，Li Chengcheng，Han Qingyu，Wang Rongjing，Li Meng，Lü Huiyun\r
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AuthorsHTMLE:\rNa Ping，Sun Qianyi，Li Chengcheng，Han Qingyu，Wang Rongjing，Li Meng，Lü Huiyun\r
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Unit:\r天津大学化工学院，天津 300350\r
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Unit_EngLish:\rSchool of Chemical Engineering and Technology，Tianjin University，Tianjin 300350，China\r
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Abstract_Chinese:\r¹³⁷\r Cs 是长半衰期的放射性核素，高效去除核废料中的¹³⁷ Cs 对于核安全储存是必要的．针对金属硫化物对痕量Cs^＋离子吸附能力不足等问题，探索了引入H 元素对硫代锡酸盐的元素组成和吸附性能的影响因素．通过材料的一系列表征和吸附实验，研究了H 元素引入量对材料的晶体结构、元素含量、Cs^＋离子去除率以及吸附容量的影响．SEM 和TEM 表明，材料形貌为多层结构，微观尺寸达到10 μm．EDS 和XRD 表明，引入H 元素后明显提高了硫代锡酸盐的S 和K 元素含量，提高了Cs＋离子吸附性能．其中具有最佳配比硫代锡酸盐的S 和K 元素含量分别提高至39.6%和14.9%，并发现随着材料内H 元素含量增加，K 元素含量、晶面间距以及晶体体积减小．Raman和XPS 证实材料是由[SnS6]八面体基本骨架组成，H 和K 元素作为平衡电荷．通过吸附实验考察了材料的Cs＋离子吸附性能．结果表明：H 元素的引入能够显著提高硫代锡酸盐的Cs^＋离子吸附性能，其中具有最佳配比的硫代锡酸盐在5 min 内快速完成Cs^＋离子吸附，去除率为97.7%；材料的Cs^＋离子吸附过程符合Langmuir 等温吸附模型，其中饱和吸附容量最高达到372 mg/g．该材料具有环境友好、低成本、易于合成以及高效的Cs^＋离子吸附能力等特点，有望应用于核废料处理．\r
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Abstract_English:\r¹³⁷\rCs is one of the radionuclides having a long half-life. Therefore，efficient removal of ¹³⁷Cs from nuclear waste is necessary for safe nuclear storage. Metal sulfides have some drawbacks，such as an insufficient ability to remove Cs⁺ ions. In this study，thiostannate containing H was explored for its elemental composition and adsorption performance，and the effects of H on the crystalline structure，element content，and Cs⁺ ion removal rate and adsorption capacity were also studied through characterization and ion exchange experiments. SEM and TEM showed that the materials were of a typical multi-layer morphology，and microcosmic size was up to 10 μm. EDS and XRD showed that the contents of S and K clearly increased with the introduction of H，and the adsorption performance of Cs⁺ ions improved. The best proportional contents of S and K in the thiostannate increased to 39.6% and 14.9%，respectively. Additionally，it was determined that with increasing H content in the materials，the content of K，crystal plane spacing，and crystal volume decreased. Raman and XPS confirmed that the material comprised [SnS6] octahedra to form the basic skeleton，and H and K acted as an equilibrium charge. Ion adsorptive properties of the Cs⁺ were investigated using Cs⁺ adsorption kinetics and ion exchange capacity experiments. Results showed that the Cs⁺ ion adsorption performance in thiostannate significantly improved with the introduction of H，and the thiostannate containing the best proportion quickly completed Cs⁺ ion adsorption within 5 min，with a removal rate of 97.7%. Cs⁺ ion adsorption of materials was in accordance with the Langmuir isothermal adsorption model，and the Langmuir fitting adsorption capacity was up to 372 mg/g. The material exhibited efficient Cs⁺ ion adsorption properties；further，the eco-friendly，low-cost，and facile synthesis underscored its potential in treating nuclear waste.\r
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Keyword_Chinese:硫代锡酸盐；结构调控；吸附；铯；核废料处理\r

Keywords_English:thiostannate；structural control；adsorption；cesium；treating nuclear waste\r


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