Abstract
Bauxite residue, also known as red mud (RM), is a kind of industrial solid waste with high alkali content, complex composition and difficult utilization. In this study, a new type of RM-based adsorbent was prepared by using polyethylene glycol modified RM and was used to remove low concentration of COS in flue gas. The optimum preparation conditions of adsorbent and the optimum technological parameters of COS adsorption purification were investigated. Under the optimal conditions, the adsorption efficiency of the new adsorbent exceeds 95%, and the COS adsorption capacity reaches 63.56 mg/m3. The characterization results showed that the main active components of the adsorbent were active alkali, FeOOH and Fe3O4, and the main products were Na2S2O3, Na2SO4, FeS and FeS2.
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Acknowledgements
This research was supported by the National Key Research and Development Program of China (2019YFC0214404), the National Natural Science Foundation of China (52060010) and the Natural Science Foundation of Yunnan Province (202001AT070088).
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Zhou, P., Qi, J., Yang, D. et al. Purification of Low-Concentration Carbonyl Sulfide by Red Mud-Based Adsorbent. Bull Environ Contam Toxicol 109, 194–201 (2022). https://doi.org/10.1007/s00128-022-03517-3
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DOI: https://doi.org/10.1007/s00128-022-03517-3