School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China.
J Environ Sci (China). 2025 Feb;148:420-436. doi: 10.1016/j.jes.2023.02.034. Epub 2023 Feb 28.
Mercury (Hg) pollution has been a global concern in recent decades, posing a significant threat to entire ecosystems and human health due to its cumulative toxicity, persistence, and transport in the atmosphere. The intense interaction between mercury and selenium has opened up a new field for studying mercury removal from industrial flue gas pollutants. Besides the advantages of good Hg° capture performance and low secondary pollution of the mineral selenium compounds, the most noteworthy is the relatively low regeneration temperature, allowing adsorbent regeneration with low energy consumption, thus reducing the utilization cost and enabling recovery of mercury resources. This paper reviews the recent progress of mineral selenium compounds in flue gas mercury removal, introduces in detail the different types of mineral selenium compounds studied in the field of mercury removal, reviews the adsorption performance of various mineral selenium compounds adsorbents on mercury and the influence of flue gas components, such as reaction temperature, air velocity, and other factors, and summarizes the adsorption mechanism of different fugitive forms of selenium species. Based on the current research progress, future studies should focus on the economic performance and the performance of different carriers and sizes of adsorbents for the removal of Hg and the correlation between the gas-particle flow characteristics and gas phase mass transfer with the performance of Hg removal in practical industrial applications. In addition, it remains a challenge to distinguish the oxidation and adsorption of Hg quantitatively.
汞 (Hg) 污染在近几十年已成为全球关注的问题，由于其在大气中的累积毒性、持久性和传输，对整个生态系统和人类健康构成了重大威胁。汞和硒的强烈相互作用为研究从工业烟道气污染物中去除汞开辟了一个新的领域。除了硒矿化合物具有良好的 Hg°捕集性能和低二次污染的优点外，最值得注意的是其相对较低的再生温度，允许使用低能耗对吸附剂进行再生，从而降低利用成本并实现汞资源的回收。本文综述了矿物硒化合物在烟道气汞去除方面的最新进展，详细介绍了在汞去除领域研究的不同类型的矿物硒化合物，综述了各种矿物硒化合物吸附剂对汞的吸附性能以及烟道气成分（如反应温度、空气速度等）的影响，并总结了不同形态硒物种的吸附机制。基于目前的研究进展，未来的研究应侧重于去除 Hg 的经济性能和不同载体及不同粒径吸附剂的性能，以及实际工业应用中气体-颗粒流动特性和气相传质与 Hg 去除性能之间的相关性。此外，定量区分 Hg 的氧化和吸附仍然是一个挑战。
