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Effect of mechanical−chemical modification on adsorption of beryllium by calcite

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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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All data generated or analyzed during this study are included in this published article (and its supplementary information files).

Funding

This study was funded by the Foundation of State Key Laboratory of Nuclear Resources and Environment (2020NRE02) and Ministry of Science and Technology of China (2019YFC1907701).

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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Xu Zhao, Zhiwu Lei, Xuanzhang Hao, Yucheng Su, Hongqiang Wang, Eming Hu, Fang Hu, Qingliang Wang, Lechang Xu, Chunze Zhou, Shiyao Fan, **nwei Liu, and Shuai Dong. The first draft of the manuscript was written by Xu Zhao, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Qingliang Wang.

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Zhao, X., Su, Y., Hao, X. et al. Effect of mechanical−chemical modification on adsorption of beryllium by calcite. Environ Sci Pollut Res 30, 125241–125253 (2023). https://doi.org/10.1007/s11356-023-27275-9

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  • DOI: https://doi.org/10.1007/s11356-023-27275-9

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