Resource utilization of natural pyrite (FeS2) as the tailings after flotation of natural sphalerite (ZnS) for reclaiming high concentrations of gaseous Hg0 from Zn smelting flue gas

Mechanisms of Gas-Phase Mercury Immobilized by Metal Sulfides from Combustion Flue Gas: A Mini Review

“…On the contrary, nano-metal sulfides with abundant-covered sulfur (S) sites have been recently found to be an excellent Hg 0 sorbent . Relying on the high affinity between S and Hg, the Hg 0 immobilization process is significantly accelerated over the surface of nano-metal sulfide .…”

“…18 On the contrary, nano-metal sulfides with abundant-covered sulfur (S) sites have been recently found to be an excellent Hg 0 sorbent. 19 Relying on the high affinity between S and Hg, the Hg 0 immobilization process is significantly accelerated over the surface of nano-metal sulfide. 20 Hence, with the combination of a reasonable pore size distribution and surface Hg-philic active sites, the Hg 0 adsorption performance of nano-metal sulfides can reach hundreds of times better than that of activated carbon.…”

CuS-Doped Ti3C2 MXene Nanosheets for Highly Efficient Adsorption of Elemental Mercury in Flue Gas

“…Therefore, people are trying to modify MXene with metal oxides, precious metals, and other materials to enhance the Hg 0 capture capacity. , However, most of them are easily affected by the acidic gases such as SO 2 and NO in the flue gas or disintegrated at higher temperatures, thereby losing the Hg 0 capture ability . Metallic sulfide doping is an effective method to promote the adsorption capacity of the adsorbent Hg 0 . − This is because the surface of the metal sulfide provides a large number of binding sites for Hg 0 to form stable mercury sulfide (HgS). Moreover, the competitive adsorption of SO 2 and Hg 0 is weakened due to the repulsion of SO 2 by the sulfur atoms on the surface, which promotes the adsorption of Hg 0 by the composites. , Therefore, it is necessary to study a new type of MXene material that has a significant removal effect on Hg 0 and has strong mercury removal stability after doping with CuS and a detailed explanation of the adsorption mechanism of the material.…”

“…Moreover, the competitive adsorption of SO 2 and Hg 0 is weakened due to the repulsion of SO 2 by the sulfur atoms on the surface, which promotes the adsorption of Hg 0 by the composites. 42,45 Therefore, it is necessary to study a new type of MXene material that has a significant removal effect on Hg 0 and has strong mercury removal stability after doping with CuS and a detailed explanation of the adsorption mechanism of the material.…”

Controllable Disordered Copper Sulfide with a Sulfur-Rich Interface for High-Performance Gaseous Elemental Mercury Capture

“…The major challenge suffered by Hg 0 removal from NFSG is the inherent high SO 2 concentration (6%) feature. − The Boliden–Norzink technique has been developed to reclaim Hg 0 under high SO 2 atmosphere, whereas the plentiful use of virulent HgCl 2 as the adsorption liquid makes this process dangerous and hard to operate. − Gaseous Hg 0 capture by using adsorption materials has been regarded as a promising alternative and attracted increasing attention due to environmental friendliness and economic feasibility. − Current studies suggested that, in comparison with various materials such as activated carbons, metal oxidizes, noble metals, and so forth, metal sulfides possess obvious advantage in SO 2 resistance and thus be regarded as the best candidate in Hg 0 capture from NFSG. − Accordingly, proactive efforts are needed to advance the understanding of Hg 0 adsorption on metal sulfides, which is beneficial for the development of more active materials in practical application.…”