白云石与方沸石对Sr<sup>2+</sup>的吸附行为研究

董阳; 王慧琳; 赵帅维; 贺含毅; 贾梅兰; 刘军; 廖家莉; 杨吉军; 杨远友; 李洪辉; 刘宁

doi:10.7538/yzk.2018.youxian.0340

白云石与方沸石对Sr²⁺的吸附行为研究

1.
中国辐射防护研究院,山西太原030006
2.
四川大学原子核科学技术研究所,辐射物理及技术教育部重点实验室,四川成都610064

计量
- 文章访问数: 371
- HTML全文浏览量: 1
- PDF下载量: 1069
出版历程
- 刊出日期: 2018-11-19

Adsorption of Sr²⁺ on Dolomite and Analcime

1.
China Institute for Radiation Protection, Taiyuan 030006, China
2.
Institute of Nuclear Science and Technology, Key Laboratory of Radiation Physics and Technology, Ministry of Education, Sichuan University, Chengdu 610064, China

摘要

摘要: 采用静态实验法研究了黏土岩的组成矿物白云石和方沸石对Sr²⁺的吸附行为，考察了时间、初始pH值、初始浓度、离子强度以及腐殖酸对吸附的影响，并利用XRD、FT-IR和SEM对材料进行了表征。结果表明：两种材料均能有效吸附Sr²⁺，初始pH值升高会促进吸附，离子强度增大会抑制两种材料对Sr²⁺的吸附；吸附均在6 d时达到平衡，吸附过程均符合准二级动力学模型，说明吸附均以化学吸附为主；随着Sr²⁺初始浓度的增加，白云石吸附Sr²⁺的吸附分配比呈先增加后降低的趋势，方沸石吸附Sr²⁺的吸附分配比不断降低；腐殖酸会抑制白云石吸附Sr²⁺，对方沸石吸附Sr²⁺的过程略有促进；Langmuir和Freundlich模型拟合结果显示，白云石吸附Sr²⁺的吸附机理较为复杂，而Sr²⁺在方沸石上的吸附过程为单分子层吸附。上述结果可为高放废物地质处置的选址工作提供基础数据和参考。
- 白云石 ,
- 方沸石 ,
- Sr²⁺ ,
- 吸附
Abstract: The adsorption behavior and the effect of various experimental conditions on Sr²⁺ adsorption on dolomite and analcime were investigated respectively with batch sorption method, and XRD, FT-IR and SEM were carried out. The results show that dolomite and analcime can adsorb Sr²⁺ effectively, and the adsorption increases with the increase of initial pH and decreases with the increase of ionic strength. The adsorption equilibrium both are achieved after 6 d. The adsorption processes both are well described by pseudo-second-order kinetics model, which indicates that the adsorption processes may be chemical adsorption. As the increase of the initial concentration of Sr²⁺, the K_d of Sr²⁺ on dolomite increases first and then decreases, and the K_d of Sr²⁺ on analcime decreases. With the increase of humic acid, the K_d of Sr²⁺ on dolomite decreases, but the K_d of Sr²⁺ on analcime increases slightly. Langmuir and Freundlich isotherm model results show that the adsorption mechanism of Sr²⁺ on dolomite is relatively complex, and it is monolayer for analcime. The results can provide basic data and reference for the site selection of high level waste.
- dolomite ,
- analcime ,
- Sr²⁺ ,
- adsorption

HTML全文

参考文献(14)

[1]	国防科学技术工业委员会,科学技术部,国家环境保护总局. 高放废物地质处置研究开发规划指南[S]. 北京:国防科学技术工业委员会,科学技术部,国家环境保护总局,2006.
[2]	郑华铃,傅冰骏,范显华,等. 建议我国重点研究粘土岩处置库预选场址[J]. 辐射防护,2007,27(2):92-98.ZHENG Hualing, FU Bingjun, FAN Xianhua, et al. Focusing on clay formation as host media of HLW geological disposal in china[J]. Radiation Protection, 2007, 27(2): 92-98(in Chinese).
[3]	WEN Ruiyuan, GAO Hongcheng, WANG Xiangyun, et al. Diffusion of fission fragment nuclides in granite[J]. Radiochimica Acta, 1997, 76(3): 137-142.
[4]	ZENG J. Sorption of radionuclides technetium and iodine on minerals[J]. Radiochimica Acta, 1988, 44-45(1): 143-146.
[5]	庞宏伟,王祥学,姚文,等. 金属氧化物材料对放射性核素的去除及机理研究[J]. 中国科学:化学,2018,48(1):58-73.PANG Hongwei, WANG Xiangxue, YAO Wen, et al. Removal of radionuclides by metal oxide materials and mechanism research[J]. Scientia Sinica Chimic, 2018, 48(1): 58-73(in Chinese).
[6]	杨姗也,王祥学,陈中山,等. 四氧化三铁基纳米材料制备及对放射性元素和重金属离子的去除[J]. 化学进展,2018,30(2/3):225-242.YANG Shanye, WANG Xiangxue, CHEN Zhongshan, et al. Synthesis of Fe₃O₄-based nanomaterials and their application in the removal of radionuclides and heavy metal ions[J]. Progress in Chemistry, 2018, 30(2/3): 225-242(in Chinese).
[7]	胡海洋. 内蒙古塔木素地区粘土岩力学特性研究[D]. 南昌:东华理工大学,2014.
[8]	齐长林,张卫民,王晓琦,等. 方沸石的水热合成及其对水溶液中Pb²⁺的吸附[J]. 济南大学学报:自然科学版,2013,27(1):59-62.QI Changlin, ZHANG Weimin, WANG Xiaoqi, et al. Hydrothermal synthesis of analcime and its adsorption behavior for Pb²⁺ in aqueous solution[J]. Journal of University of Jinan: Scinece and Technology, 2013, 27(1): 59-62(in Chinese).
[9]	AYOUB G M, MEHAWEJ M. Adsorption of arsenate on untreated dolomite powder[J]. Journal of Hazardous Materials, 2007, 148(1-2): 259-266.
[10]	PEHLIVAN E, ÖZKAN A M, DINC S, et al. Adsorption of Cu²⁺ and Pb²⁺ ion on dolomite powder[J]. Journal of Hazardous Materials, 2009, 167(1-3): 1044-1049.
[11]	DYER A, TANGKAWANIT S, RANGSRIWATANANON K. Exchange diffusion of Cu²⁺, Ni²⁺, Pb²⁺ and Zn²⁺ into analcime synthesized from perlite[J]. Microporous & Mesoporous Materials, 2004, 75: 273-279.
[12]	ZHAO D, WANG X, YANG S, et al. Impact of water quality parameters on the sorption of U(Ⅵ) onto hematite[J]. Journal of Environmental Radioactivity, 2012, 103(1): 20-29.
[13]	李颖. 水体中重金属、腐殖酸和粘土颗粒物之间的相互作用研究[D]. 济南:山东大学,2010.
[14]	JI J, GE Y, BALSAM W, et al. Rapid identification of dolomite using a fourier transform infrared spectrophotometer (FTIR): A fast method for identifying Heinrich events in IODP Site U1308[J]. Marine Geology, 2009, 258(1): 60-68.

施引文献

资源附件(0)

计量

文章访问数: 371
HTML全文浏览量: 1
PDF下载量: 1069
被引次数: 0

白云石与方沸石对Sr2+的吸附行为研究

计量

出版历程

Adsorption of Sr2+ on Dolomite and Analcime

计量

出版历程

目录

白云石与方沸石对Sr²⁺的吸附行为研究

Adsorption of Sr²⁺ on Dolomite and Analcime