Study on the Stabilization of Cd<sup>2+</sup> by Cementitious Materials Prepared with Metallurgical Slag

CUI Xiaowei; DENG Wanxin; XIE Yuxuan; WANG Le

doi:10.13779/j.cnki.issn1001-0076.2021.01.002

2021 Vol. 41, No. 1

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CUI Xiaowei, DENG Wanxin, XIE Yuxuan, WANG Le. Study on the Stabilization of Cd2+ by Cementitious Materials Prepared with Metallurgical Slag[J]. Conservation and Utilization of Mineral Resources, 2021, 41(1): 15-19. doi: 10.13779/j.cnki.issn1001-0076.2021.01.002

Citation:

CUI Xiaowei, DENG Wanxin, XIE Yuxuan, WANG Le. Study on the Stabilization of Cd²⁺ by Cementitious Materials Prepared with Metallurgical Slag[J]. Conservation and Utilization of Mineral Resources, 2021, 41(1): 15-19. doi: 10.13779/j.cnki.issn1001-0076.2021.01.002

Study on the Stabilization of Cd²⁺ by Cementitious Materials Prepared with Metallurgical Slag

1.
College of Chemical Engineering and Modern Materials, Shangluo University, Shangluo 726000, Shaanxi, China
2.
Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo University, Shangluo 726000, Shaanxi, China
3.
Shaanxi Engineering Research Center for Mineral Resources Clean & Efficient Conversion and New Materials, Shangluo University, Shangluo 726000, Shaanxi, China

Received Date: 05 January 2021

Publish Date: 25 February 2021

Abstract

Abstract

The cementitious materials were prepared with steel slag, blast furnace slag and desulfurization gypsum and its stabilization effect on Cd²⁺ was studied. The results showed that the cementitious materials had a better adsorption effect on Cd²⁺ when the concentration of Cd²⁺ was not higher than 30 mg/kg. The reasons were as follows. Cadmium ions could replace Ca²⁺ into the lattice of ettringite (AFt) and Friedel salt by a "quasi-homogeneous" manner. Then it formed a cadmium-containing double salt and was solidified. Coupled with the adsorption of C-S-H on cadmium, Cd²⁺ was finally cured efficiently. The research results have great significance for the treatment of wastewater containing cadmium.
- cementitious material /
- cadmium ions /
- adsorption /
- synergistic effect

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References

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