Abstract
The abatement of SO2 and the utilization of copper tailings are identified as two attention-attracting environmental issues in the copper smelter. In this study, to improve the flue gas desulfurization performance and the utilization of copper tailings, SO2 removal from smelting flue gas by using copper tailings combined with MnSO4·H2O was investigated. The effects of operation variables, including inlet SO2 concentration, absorption temperature, slurry concentration, and MnSO4·H2O amount, on the flue gas desulfurization performance were studied based on the response surface method. It was found that the effect of operation variables on SO2 removal follows the descending order: the inlet SO2 concentration, MnSO4·H2O concentration, absorbent temperature, and solid-liquid ratio. The interaction between the inlet SO2 concentration and MnSO4·H2O concentration is an important factor for breakthrough sulfur capacity. Elevated temperature and high initial SO2 concentration inhibited the efficient removal of SO2. Moreover, a proposed equation exhibits good consistency in the prediction for the breakthrough sulfur dioxide capacity. Therefore, the results can provide a reliable reference and basis for industrial application for flue gas desulfurization with copper tailings.
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Funding
This work was supported by the National Key Research and Development Program of China (2018YFC0213400, 2017YFC0210500) and the National Natural Science Foundation of China (No. 51868030).
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Lei Tao: conceptualization, methodology, investigation, formal analysis, data curation, writing (original draft), and validation
Langlang Wang: writing (review and editing), and validation
Yangjie Zhou: investigation
Ningmeng Hu: investigation
Jun Cai: Writing (review and editing)
Xiaoyu Chen: conceptualization and validation
Xueqian Wang: funding acquisition, conceptualization, validation, and project administration
Ping Ning: conceptualization, methodology, resources, and project administration
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Tao, L., Wang, L., Zhou, Y. et al. Removal of SO2 from smelting flue gas by using copper tailings with MnSO4: factors optimization by response surface methodology. Environ Sci Pollut Res 28, 48417–48426 (2021). https://doi.org/10.1007/s11356-021-13990-8
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DOI: https://doi.org/10.1007/s11356-021-13990-8