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第 36 卷第 4 期 精 细 化 工 Vol.36, No.4
201 9 年 4 月 FINE CHEMICALS Apr. 2019

水处理技术与环境保护
ZnS/AC 复合材料的制备及对铀酰离子的吸附性能

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曾琼瑶，阳鹏飞 ，雷卫瑞，蒋倩媛，黎杰鑫，齐梓亭
（南华大学 化学化工学院 湖南 衡阳 421001）

摘要：以硝酸锌、硫化钠和活性炭为原料，采用化学沉淀法制备活性炭(AC)负载纳米硫化锌的复合材料 ZnS/AC。
2+
利用 SEM、EDS、XRD、FTIR、BET 等对其进行了表征。考察了 ZnS/AC 对水溶液中铀酰离子（UO 2 ）的吸
附性能，探讨了吸附时间、初始铀酰离子质量浓度、pH、吸附剂投加量、温度等对吸附性能的影响，并对吸附
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过程进行了热力学和动力学模拟，探讨了吸附机理。结果表明，ZnS/AC 的比表面积为 201.1961 m /g，明显大
3
2
于活性炭的比表面积（165.0240 m /g），平均孔径为 4.70 nm，孔容为 0.038 cm /g。在初始铀酰离子质量浓度为
35 mg/L、pH=6、吸附时间为 120 min、ZnS/AC 投加量为 0.01 g、处理温度为 50 ℃下，吸附剂对铀酰离子的吸
附量为 63.75 mg/g。吸附过程符合准二级动力学方程和 Langmuir 吸附等温模型，热力学参数G<0、S>0、H>0，
表明该吸附是一个自发的吸热过程。
关键词：ZnS；活性炭；铀酰离子；吸附；水处理技术与环境保护
中图分类号：TQ 028.8 文献标识码：A 文章编号：1003-5214 (2019) 04-0751-08

Preparation of ZnS/AC Composites and Its Adsorption
Performance for Uranyl Ions in Aqueous Solution

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ZENG Qiong-yao, YANG Peng-fei , LEI Wei-rui, JIANG Qian-yuan, LI Jie-xin, QI Zi-ting
（School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, Hunan, China）

Abstract: Zinc sulfide nanoparticles loaded on activated carbon (ZnS/AC) was prepared by chemical
precipitation method using zinc nitrate, sodium sulfide and activated carbon as raw materials and
characterized by SEM, EDS, XRD, FTIR and BET. The adsorption performance of ZnS/AC for uranyl ions
in aqueous solution was studied. The effects of adsorption time, initial mass concentration of uranyl ions,
pH value, adsorbent dosage and temperature on the adsorption performance of ZnS/AC were investigated.
The adsorption processes were simulated by thermodynamic and kinetic equations and the adsorption
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mechanism was discussed. The results show that the specific surface area of ZnS/AC is 201.1961 m /g,
2
which is significantly higher than that of activated carbon (165.0240 m /g). The average pore diameter is
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4.70 nm and the pore volume is 0.038 cm /g. Under the conditions of the initial uranyl concentration of 35
mg/L, pH=6, adsorption time of 120 min, dosage of 0.01 g, and treatment temperature of 50 ℃, the
adsorption capacity of the adsorbent for uranyl ions is 64.4736 mg/g. The adsorption process conforms to
the pseudo second order kinetic equation and the adsorption isotherm fits well with the Langmuir
adsorption model. The thermodynamic parameters G<0, S>0, H>0, indicate that the adsorption is a
spontaneous endothermic process.
Key words: ZnS; activated carbon; uranyl ions; adsorption; water treatment technology and environmental
protection
Foundation item: Natural Science Foundation of Hunan Province (2017JJ2231)

收稿日期：2018-08-19; 定用日期：2018-12-19; DOI: 10.13550/j.jxhg.20180608
基金项目：湖南省自然科学基金项目（2017JJ2231）
作者简介：曾琼瑶（1997—），女，本科生，E-mail：qiongyao0419@qq.com。联系人：阳鹏飞（1978—），男，副教授，E-mail：
ypengfei2008@126.com。