Synthesis of mesoporous Cr(OH)3 and its adsorption of vanadium(Ⅴ) ion from V containing solution

doi:10.11949/j.issn.0438-1157.20160808

CIESC Journal ›› 2016, Vol. 67 ›› Issue (12): 5283-5290.DOI: 10.11949/j.issn.0438-1157.20160808

Synthesis of mesoporous Cr(OH)₃ and its adsorption of vanadium(Ⅴ) ion from V containing solution

LI Hualin^1,2,3, LUO Minting^2,3, ZHANG Hongling^2,3, SHI Yilang⁴, ZHANG Bingzhu¹, CAI Zaihua⁴, XU Hongbin^2,3, ZHANG Yi^2,3

1 School of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China;
2 National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3 Key Laboratory of Green Process and Engineering, Chinese Academy of Sciences, Beijing 100190, China;
4 Hubei Zhenhua Chemical Co. Ltd., Huangshi 435001, Hubei, China

Received:2016-06-13 Revised:2016-08-29 Online:2016-12-05 Published:2016-12-05
Supported by:
supported by the National Basic Research Program of China(2013CB632600) and the National Natural Science Foundation of China(21406233, 21376251).

介孔Cr(OH)₃的制备及其对钒(Ⅴ)离子的吸附性能

李华琳^1,2,3, 雒敏婷^2,3, 张红玲^2,3, 石义朗⁴, 张炳烛¹, 蔡再华⁴, 徐红彬^2,3, 张懿^2,3

1 河北科技大学化学与制药工程学院, 河北石家庄 050018;
2 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室, 北京 100190;
3 中国科学院绿色过程与工程重点实验室, 北京 100190;
4 湖北振华化学股份有限公司, 湖北黄石 435001

通讯作者: 张炳烛,751895430@qq.com;张红玲,hlzhang@ipe.ac.cn
基金资助:
国家重点基础研究发展计划项目（2013CB632600）；国家自然科学基金项目(21406233，21376251)。

Abstract

Abstract:

Previous study have examined many materials to remove the vanadium ions from aqueous solution, but it is difficult to meet the national discharge standard. In this paper, a mesoporous chromium hydroxide(Cr(OH)₃), which has a high specific surface area(312.70 m²·g^-1) and a large pore volume(0.48 cm³·g^-1), was synthesized by adding NaOH solution into CrCl₃·6H₂O solution drop by drop. The mesoporous Cr(OH)₃ powders were used as adsorbents to remove vanadium ions from aqueous solution, which showed high efficiency in vanadium removing at pH from 2.0~9.0 and concentration of V⁵⁺ ranging from 100 to 500 mg·L^-1. Under the optimal conditions, the adsorption rate of vanadium approached to 100% and the concentration of V⁵⁺ decreased from 500 to 0.81 mg·L^-1. The adsorption process belonged to the Langmuir isothermal adsorption and the coefficient was higher than 0.99. Dynamic analysis showed that the pseudo-second-order model could describe the adsorption process very well.

Key words: chromium hydroxide, mesoporous, powders, adsorption, waste water, vanadium removal

摘要：

以CrCl₃·6H₂O作为铬源，通过添加强碱制备出大比表面积（312.70 m²·g^-1）、高孔隙率（0.48 cm³·g^-1）的介孔Cr（OH）₃，并研究了其对溶液中钒（V）离子的吸附性能，考察了溶液pH、吸附剂用量、吸附温度、吸附时间等条件对吸附效果的影响。结果表明，当溶液pH在2.0~9.0、钒离子浓度为100~500 mg·L^-1时，采用该吸附剂均可实现溶液中钒离子的高效去除。在最优实验条件下，钒去除率接近100%，钒离子浓度可由500 mg·L^-1降至0.81 mg·L^-1。吸附热力学的研究结果表明，Cr（OH）₃对钒离子的吸附过程遵循Langmuir等温吸附；吸附过程符合拟二级反应动力学方程，反应级数为拟二级。

关键词: Cr(OH)₃, 介孔, 粉体, 吸附, 废水, 除钒

CLC Number:

TP273

LI Hualin, LUO Minting, ZHANG Hongling, SHI Yilang, ZHANG Bingzhu, CAI Zaihua, XU Hongbin, ZHANG Yi. Synthesis of mesoporous Cr(OH)₃ and its adsorption of vanadium(Ⅴ) ion from V containing solution[J]. CIESC Journal, 2016, 67(12): 5283-5290.

李华琳, 雒敏婷, 张红玲, 石义朗, 张炳烛, 蔡再华, 徐红彬, 张懿. 介孔Cr(OH)₃的制备及其对钒(Ⅴ)离子的吸附性能[J]. 化工学报, 2016, 67(12): 5283-5290.

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Synthesis of mesoporous Cr(OH)₃ and its adsorption of vanadium(Ⅴ) ion from V containing solution

介孔Cr(OH)₃的制备及其对钒(Ⅴ)离子的吸附性能

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