硅酸盐学报

高炉渣基地质聚合物对Zn²⁺的吸附和解吸性能

PDF下载

陈桥 ¹ , 董欣 ¹ , 姬龙雪 ¹ , 金海泽 ¹ , 李岩松 ² , 李海信 ³ , 杜雪岩 ¹

硅酸盐学报 | 研究论文 2025,53(5): 1078-1087

收起

硅酸盐学报 |研究论文 2025 , 53 (5) : 1078 -1087

高炉渣基地质聚合物对Zn²⁺的吸附和解吸性能

全屏

陈桥¹, 董欣¹, 姬龙雪¹, 金海泽¹, 李岩松², 李海信³, 杜雪岩¹

作者信息

^1．兰州理工大学材料科学与工程学院，兰州 730050

^2．沈阳有色金属研究院，沈阳 110027

^3．甘肃昊泰科技有限公司，甘肃白银 730600

作者简介:

陈桥（1993—），男，博士，副教授。

Adsorption and Desorption Performances of Zn²⁺ by Geopolymers Based on Blast Furnace Slag

Qiao CHEN¹, Xin DONG¹, Longxue JI¹, Haize JIN¹, Yansong LI², Haixin LI³, Xueyan DU¹

Affiliations

^1.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China

^2.Shenyang Nonferrous Metals Research Institute Co., LTD, Shenyang 110000, China

^3.Gansu Haotai Technology Co., LTD, Baiyin 730600, Gansu, China

CHEN Qiao (1993-), male, Ph.D., Associate Professor. E-mail: chenqiao@lut.edu.cn

出版时间: 2025-05-20 doi: 10.14062/j.issn.0454-5648.20240797

文章导航

摘要

收起

地质聚合物在重金属污水处理领域具有极高的应用潜力，以高炉渣为原料制备地质聚合物吸附材料，研究其对Zn²⁺的吸附/解吸机制和性能，可达到“以废治废”的目的。结果表明：高炉渣基地质聚合物对Zn²⁺的吸附量随溶液初始浓度的增大而增加，当Zn²⁺溶液初始浓度为200 mg/L时，平衡吸附率和吸附量分别为98.07%和196.14 mg/g。吸附动力学研究表明高炉渣基地质聚合物吸附Zn²⁺的过程符合准二级动力学模型和Langmuir模型，属于化学单层吸附。高炉渣基地质聚合物对Zn²⁺的吸附以离子交换为主，故利用含高水化能H⁺的硝酸进行解吸更易脱去Zn²⁺而实现循环吸附。硝酸对负载Zn²⁺的地质聚合物初次解吸率为45.52%，经过2次吸附-解吸循环，其对Zn²⁺的吸附率仍能达到56.83%，表明高炉渣基地质聚合物具有良好的循环利用性能。

关键词

高炉渣 / 地质聚合物 / 锌离子 / 吸附 / 解吸

Abstract

收起

Introduction

Adsorption is one of the most effective heavy metal ion treatment techniques available. Common heavy metal ion adsorbents include activated carbon, chitosan, cellulose and natural zeolite. Geopolymers, as a new type of adsorbent material, show great potential and value for application in the field of zinc-containing heavy metal wastewater treatment. Blast furnace slag is a type of bulk solid waste in the metallurgical industry, and the current high value utilisation rate is low. The use of blast furnace slag to prepare geopolymer adsorbent materials to treat heavy metal wastewater is one of the effective ways to realise the comprehensive utilisation of blast furnace slag in a high value way, which can achieve the purpose of 'waste for waste'. At present, the related research mainly focuses on the adsorption mechanism and adsorption effect of geopolymers on heavy metal ions, while less attention has been paid to the desorption of heavy metal ions after adsorption and the recycling of geopolymers, and only a few scholars have carried out preliminary explorations by using inorganic acid, EDTA-2Na, and NaCl solution as desorbing agents. In this study, the geopolymer adsorbent material was prepared from blast furnace slag to investigate its adsorption performance and mechanism of action on zinc Zn²⁺, and nitric acid was used as a resolving agent to investigate the desorption effect of Zn²⁺ and the recycling performance of geopolymer adsorbent, which is of great guiding significance for the high value-added utilisation of metallurgical solid wastes and the treatment of zinc-containing heavy metal ion wastewater.

Methods

Determination of major oxides and their contents in blast furnace slag using XRF. Particle size distribution of finely ground blast furnace slag was analysed using a laser particle size meter. Analysis of the crystalline phase structure of blast furnace slag and geopolymers using XRD. The specific surface area of the geopolymer and its pore size were characterised using BET. The concentration of Zn²⁺ in solution was detected by ICP. SEM-EDS was used to analyse the crystalline structure, micro-morphology and compositional distribution of the geopolymer before and after adsorption. Kinetic analysis of geopolymers using quasi-primary and quasi-secondary kinetic models. Adsorption isotherms were simulated for geopolymers using the Langmuir adsorption isotherm model and the Freundlich adsorption isotherm model.

Results and discussion

The surface and interior of geopolymers based on blast furnace slag (BFSGP) contains a large number of pore structures, which are favourable for the migration of Zn²⁺ in the solution, and at the same time increase the adsorption sites, thus effectively improving the adsorption capacity and adsorption efficiency of BFSGP. The N₂ adsorption and desorption isothermal curves and pore size distribution curves of BFSGP indicate that BFSGP is a typical mesoporous structure. The adsorption of Zn²⁺ by BFSGP increased significantly with the increase in the initial ion concentration of the solution. The adsorption process of BFSGP followed the quasi-secondary kinetic model and the Langmuir model, thus indicating that the adsorption process of BFSGP was dominated by chemisorption, and its adsorption process was strongly influenced by the chemical reaction between BFSGP and Zn²⁺, and at the same time conformed to the characteristics of the monomolecular layer adsorption.

In the desorption experiments, within the first 20 min, nitric acid rapidly enters into the pores of the adsorbent and acts to break the chemical bond between Zn²⁺ and BFSGP, and the desorption rate is fast. The desorption rate decreases as the readily desorbed Zn²⁺ decreases. Despite the loss of some active adsorption sites due to chemical bonding and Al³⁺ leaching during the cyclic adsorption-desorption process, BFSGP still maintains good adsorption performance for Zn²⁺, which provides a new idea for the recycling of BFSGP as well as for the recovery of geopolymer-loaded heavy metals by the pickling method.

Conclusions

The adsorption of Zn²⁺ by BFSGP increased with the initial concentration of the solution. When the initial ion concentration was 200 mg/L, the adsorption amount and adsorption rate of Zn²⁺ by BFSGP were 196.14 mg/g and 98.07%, respectively. The adsorption of Zn²⁺ by BFSGP is in accordance with the quasi-secondary kinetic model and Langmuir model and is a chemical monolayer adsorption. BFSGP showed better adsorption performance in cyclic adsorption-desorption experiments, the first desorption rate of nitric acid was 45.52%, and after two cyclic adsorption-desorption cycles, the adsorption rate of BFSGP on Zn²⁺ was still up to 56.83%.

Key words

blast furnace slag / geopolymers / zinc ion / adsorption / desorption

引用本文

陈桥, 董欣, 姬龙雪, 金海泽, 李岩松, 李海信, 杜雪岩. 高炉渣基地质聚合物对Zn²⁺的吸附和解吸性能. 硅酸盐学报, 2025 , 53 (5) : 1078 -1087 . DOI: 10.14062/j.issn.0454-5648.20240797

Qiao CHEN, Xin DONG, Longxue JI, Haize JIN, Yansong LI, Haixin LI, Xueyan DU. Adsorption and Desorption Performances of Zn²⁺ by Geopolymers Based on Blast Furnace Slag[J]. Journal of the Chinese Ceramic Society, 2025 , 53 (5) : 1078 -1087 . DOI: 10.14062/j.issn.0454-5648.20240797

基金

收起

甘肃省青年博士支持项目(024QB-023)
中国博士后科学基金(2022MD723861)
兰州理工大学红柳优秀青年人才支持计划(062406)

参考文献

收起

文献

收起

参考文献引证文献

排序方式：

2025年第53卷第5期

PDF下载

引用本文

BibTeX

文章信息

doi: 10.14062/j.issn.0454-5648.20240797

接收时间：2024-12-13
首发时间：2026-10-22
出版时间：2025-05-20

补充材料

相关文章

文章信息

作者

出版历史

收稿日期：2024-12-13
修回日期：2025-01-03

基金

甘肃省青年博士支持项目(024QB-023)

中国博士后科学基金(2022MD723861)

兰州理工大学红柳优秀青年人才支持计划(062406)

作者信息

^1．兰州理工大学材料科学与工程学院，兰州 730050

^2．沈阳有色金属研究院，沈阳 110027

^3．甘肃昊泰科技有限公司，甘肃白银 730600

参考文献

分享链接

https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20240797

分享至

全文二维码

扫描看全文

引用本文

BibTeX

本文的引用情况

2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

关闭全屏

BibTeX
EndNote
RefWorks
TxT