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Zhao X, Su Y, Hao X, Wang H, Hu E, Hu F, Lei Z, Wang Q, Xu L, Zhou C, Fan S, Liu X, Dong S. Effect of mechanical-chemical modification on adsorption of beryllium by calcite. Environ Sci Pollut Res Int 2023; 30:125241-125253. [PMID: 37140871 DOI: 10.1007/s11356-023-27275-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/24/2023] [Indexed: 05/05/2023]
Abstract
The treatment of beryllium wastewater has become a major problem in industry. In this paper, CaCO3 is creatively proposed to treat beryllium-containing wastewater. Calcite was modified by an omnidirectional planetary ball mill by a mechanical-chemical method. The results show that the maximum adsorption capacity of CaCO3 for beryllium is up to 45 mg/g. The optimum treatment conditions were pH = 7 and the amount of adsorbent was 1 g/L, and the best removal rate was 99%. The concentration of beryllium in the CaCO3-treated solution is less than 5 μg/L, which meets the international emission standard. The results show that the surface co-precipitation reaction between CaCO3 and Be (II) mainly occurs. Two different precipitates are generated on the used-CaCO3 surface; one is the tightly connected Be (OH)2 precipitation, and the other is the loose Be2(OH)2CO3 precipitation. When the pH of the solution exceeds 5.5, Be2+ in the solution is first precipitated by Be (OH)2. After CaCO3 is added, CO32- will further react with Be3(OH)33+ to form Be2(OH)2CO3 precipitation. CaCO3 can be considered as an adsorbent with great potential to remove beryllium from industrial wastewater.
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Affiliation(s)
- Xu Zhao
- School of Nuclear Science and Technology, University of South China, Hengyang, 421001, Hunan, China
| | - Yucheng Su
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Xuanzhang Hao
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Hongqiang Wang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Eming Hu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Fang Hu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Zhiwu Lei
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, Jiangxi, China
| | - Qingliang Wang
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China.
| | - Lechang Xu
- Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Tongzhou District, Beijing, 101149, China
| | - Chunze Zhou
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Shiyao Fan
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Xinwei Liu
- School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, Hunan, China
| | - Shuai Dong
- Taiyuan Railway Construction Co., Ltd. of China Railway Sixth Bureau Group, Taiyuan, 030000, China
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