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Li Z, Zhao J, Sun D, Wu X, Mei T, Ye Z, Zhao S. Excellent Mercury Removal in High Sulfur Atmosphere Using a Novel CuS-BDC-2D Derived by Metal-Organic Frame. Environ Sci Technol 2024; 58:660-670. [PMID: 38110333 DOI: 10.1021/acs.est.3c06653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
To effectively remove high concentrations of mercury in a high sulfur atmosphere of nonferrous smelting flue gas, a novel two-dimensional CuS-MOF (CuS-BDC-2D) material is synthesized by anchoring S to Cu sites in the Cu-BDC MOF. The highly dispersed CuS active sites and MOF framework structural properties in CuS-BDC-2D enable efficiently collaborate in capturing mercury. CuS-BDC-2D exhibits a layered floral structure with high specific surface area and thermal stability, with poor crystallinity. Compared to CuS and the three-dimensional CuS-MOF (CuS-BDC-3D) structure, CuS-BDC-2D demonstrates significantly higher mercury capture capacity due to the high exposure of active sites and defects sites in the two-dimensional material. Moreover, CuS-BDC-2D exhibits excellent resistance to sulfur, maintaining its high efficiency in removing Hg0 even at high levels of sulfur dioxide (SO2), such as 5000-20,000 ppm. The superior performance of CuS-BDC-2D makes it suitable for controlling mercury emissions in actual nonferrous smelting flue gas. This discovery also paves the way for the development of new mercury adsorbents, which can guide future advancements in this field.
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Affiliation(s)
- Zhen Li
- School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
| | - Jin Zhao
- School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
| | - Daorong Sun
- State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xueqian Wu
- School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
| | - Tianhong Mei
- School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
| | - Zhaolian Ye
- School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
| | - Songjian Zhao
- School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, PR China
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Feng J, Li K, Wang X, Yang X, Hu K, Wang F, Ning P, Jia L, Cai J. Two Birds with One Stone: Copper-Based Adsorbents Used for Photocatalytic Oxidation of Hg 0 (Gas) after Removal of PH 3. Environ Sci Technol 2023; 57:4632-4642. [PMID: 36912193 DOI: 10.1021/acs.est.3c00065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
CuX/TiO2 adsorbents with CuO as the active component were prepared via a simple impregnation method for efficient purification of phosphine (PH3) under the conditions of low temperatures (90 °C) and low oxygen concentration (1%). The PH3 breakthrough capacity of optimal adsorbent (Cu30/TiO2) is 136.2 mg(PH3)·gsorbent-1, and the excellent dephosphorization performance is mainly attributed to its abundant sur face-active oxygen and alkaline sites, large specific surface area, and strong interaction between CuO and the support TiO2. Surprisingly, CuO is converted to Cu3P after the dephosphorization by CuX/TiO2. Since Cu3P is a P-type semiconductor with high added value, the deactivated adsorbent (Cu3P/TiO2) is an efficient heterostructure photocatalyst for photocatalytic removal of Hg0 (gas) with the Hg0 removal performance of 92.64% under visible light. This study provides a feasible strategy for the efficient removal and resource conversion of PH3 under low-temperature conditions and the alleviation of the environmental risk of secondary pollution.
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Affiliation(s)
- Jiayu Feng
- School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, Yunnan, P. R. China
| | - Kai Li
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
| | - Xueqian Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
| | - Xuejin Yang
- School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, Yunnan, P. R. China
| | - Kaiqiang Hu
- School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, Yunnan, P. R. China
| | - Fang Wang
- School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, Yunnan, P. R. China
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
| | - Lijuan Jia
- School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, Yunnan, P. R. China
| | - Jun Cai
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650039, Yunnan, P. R. China
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Deng M, Xiao Z, Li D, Zhu Q, Chen Q, Wu S. Simultaneous removal of NO, SO 2 and Hg 0 with the WDRMRS. Environ Technol 2023; 44:659-669. [PMID: 34657577 DOI: 10.1080/09593330.2021.1980831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/04/2021] [Indexed: 06/13/2023]
Abstract
Micro-nanobubbles can spontaneously generate hydroxyl free radicals (OH). Urea is a cheap reductant and can react with NOx species, and their products are nontoxic and harmless N2, CO2 and H2O. In this study, a Wet Direct Recycling Micro-nanobubble Flue Gas Multi-pollutants Removal System (WDRMRS) was developed for the simultaneous removal of NO, SO2 and Hg0. In this system, a micro-nanobubble generator (MNBG) was used to produce a micro-nanobubble gas-liquid dispersion system (MNBGLS) through recycling the urea solution from the reactor and the simulated flue gas composed of N2, NO, SO2 and Hg0. The MNBGLS, which has a large gas-liquid dispersion interface, was recycled continuously from the MNBG to the reactor, thus achieving cyclic absorption of various pollutants. All of the investigated parameters, including the initial pH and temperature of the absorbent as well as the concentrations of urea, NO and SO2 had significant effects on the NO removal efficiency but did not significantly affect the SO2 removal efficiency, whereas only the initial solution pH and NO concentration affected the Hg0 removal efficiency. The analysis results of the reaction mechanism showed that ·OH played a critical role in the removal of various pollutants. After the treatment by this system, the main removal products were Hg0 sediment, SO42- and NH4+ which could be easily recycled. The use of this system (MNBGLS) for the simultaneous removal of NO, SO2 and Hg0 is a new technology application and research. Recycling process based on MNBGLS succeeded in simultaneously removing NO, SO2 and Hg0. The system (MNBGLS) can provide a reference for commercial applications. The removal products are relatively simple and beneficial to recycling, which can reduce the cost of waste gas treatment.
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Affiliation(s)
- Mingqiang Deng
- College of Environmental Science and Engineering, Donghua University, Shanghai, People's Republic of China
| | - Zhengguo Xiao
- Shanghai Textile Research Institute Co. Ltd, Shanghai, People's Republic of China
| | - Dengxin Li
- College of Environmental Science and Engineering, Donghua University, Shanghai, People's Republic of China
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, People's Republic of China
| | - Qiaoling Zhu
- College of Environmental Science and Engineering, Donghua University, Shanghai, People's Republic of China
| | - Qin Chen
- College of Environmental Science and Engineering, Donghua University, Shanghai, People's Republic of China
| | - Sicheng Wu
- College of Environmental Science and Engineering, Donghua University, Shanghai, People's Republic of China
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Tian Z, Song C, Wu H. Density Functional Study to Investigate the Ability of (ZnS)(n) (n = 1-12) Clusters Removing Hg(0), HgCl, and HgCl(2) via Electron Localization Function and Non-Covalent Interactions Analyses. Molecules 2023; 28. [PMID: 36770880 DOI: 10.3390/molecules28031214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/14/2023] [Accepted: 01/23/2023] [Indexed: 01/28/2023] Open
Abstract
In this study, the density functional theory is used to study the ability of (ZnS)n clusters to remove Hg0, HgCl, and HgCl2 and reveals that they can be absorbed on (ZnS)n clusters. According to electron localization function (ELF) and non-covalent interactions (NCI) analyses, the adsorption of Hg0 on (ZnS)n is physical adsorption and the adsorption ability of (ZnS)n for removing Hg0 is weak. When (ZnS)n adsorbs HgCl and HgCl2, two new Hg-S and Zn-Cl bonds form in the resultant clusters. An ELF analysis identifies the formation of Hg-S and Zn-Cl bonds in (ZnS)nHgCl and (ZnS)nHgCl2. A partial density of states and charge analysis confirm that as Hg0, HgCl, and HgCl2 approach (ZnS)n clusters, atomic orbitals in Hg and Zn, Hg and S, as well as Zn and Cl overlap and hybridize. Adsorption energies of HgCl and HgCl2 on (ZnS)n clusters are obviously bigger than those of Hg0, indicating that HgCl and HgCl2 adsorption on (ZnS)n clusters is much stronger than that of Hg0. By combining ELF analysis, NCI analysis, and adsorption energies, the adsorption of HgCl, and HgCl2 on (ZnS)n clusters can be classified as chemical adsorption. The adsorption ability of (ZnS)n clusters for removing HgCl and HgCl2 is higher than that of Hg0.
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Xu NJ, Li S, Fu YH, Wang ZY, Feng LJ, Wang J. Electrochemical enhancement of high-efficiency wet removal of mercury from flue gas. Environ Sci Pollut Res Int 2022; 29:29105-29116. [PMID: 34994934 DOI: 10.1007/s11356-021-18462-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Electrochemical wet absorption composite system has an excellent potential to remove Hg0 from flue gas. In this study, ruthenium iridium titanium platinum quaternary composite electrode is used as an anode and titanium electrode is used as the cathode, and KI/I2 absorption solution is introduced into the electrocatalysis system as an electrolyte to form KI/I2 electrochemical catalytic oxidation system. The removal rate of Hg0 in flue gas can be increased to 92.3%. The effects of electrolytic voltage, current, Pt content, I2 concentration, and the ratio of KI/I2 on the removal of Hg0 were discussed. The possible free radicals in the electrochemical cathode, anode, and solution were characterized and tested by XRD, SEM, UV-Vis (detection of H2O2, ·OH, O3), and FTIR (detection of IO3-). Combined with experimental data and theoretical derivation, the mechanism of Hg0 removal from flue gas by electrochemical catalytic oxidation alloy formation wet absorption combined process was studied. The results show that the combined process, which is a promising technology can not only improve the removal efficiency of Hg0, but also realize the resource recovery of Hg0 and I2, and provide a feasibility study for the subsequent regeneration of KI/I2 absorption solution.
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Affiliation(s)
- Nai-Jiao Xu
- School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang, 550000, China
- Guizhou Normal University National Key Laboratory Breeding Base of Karst Mountain Ecological Environment in Guizhou Province, Guiyang, 550000, China
| | - Sen Li
- School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang, 550000, China.
- Guizhou Normal University National Key Laboratory Breeding Base of Karst Mountain Ecological Environment in Guizhou Province, Guiyang, 550000, China.
- Jiangsu Hydroxyl Source Environment and Energy Technology Co., Ltd, Taizhou, 225300, China.
| | - Yu-Hong Fu
- School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang, 550000, China
- Guizhou Normal University National Key Laboratory Breeding Base of Karst Mountain Ecological Environment in Guizhou Province, Guiyang, 550000, China
| | - Zhao-Yang Wang
- College of Earth and Environment Sciences, Lanzhou, 730000, China
| | - Li-Juan Feng
- School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang, 550000, China
- Guizhou Normal University National Key Laboratory Breeding Base of Karst Mountain Ecological Environment in Guizhou Province, Guiyang, 550000, China
| | - Ji Wang
- School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang, 550000, China
- Guizhou Normal University National Key Laboratory Breeding Base of Karst Mountain Ecological Environment in Guizhou Province, Guiyang, 550000, China
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Camarinho R, Navarro-Sempere A, Garcia PV, García M, Segovia Y, Rodrigues AS. Chronic exposure to volcanic gaseous elemental mercury: using wild Mus musculus to unveil its uptake and fate. Environ Geochem Health 2021; 43:4863-4867. [PMID: 33860889 DOI: 10.1007/s10653-021-00924-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 04/01/2021] [Indexed: 06/12/2023]
Abstract
Volcanoes are a natural source of gaseous elemental mercury (GEM) (Hg0). Monitoring GEM releases of volcanic origin has been widely studied; however, few studies have been performed about the biomonitoring of species exposed to GEM, rendering an unknown risk to the worldwide populations living in the vicinity of an active volcano. In this pilot study, we used Mus musculus as a bioindicator species to understand to what extent lungs are the main route of mercury uptake in populations chronically exposed to active volcanic environments. Autometallographic silver protocol was used to detect mercury deposits in the histological lung slides. Abundant mercury deposits were found in the lungs of specimens captured at the site with volcanic activity (Furnas Village, S. Miguel Island-Azores). The presence of mercury in the lungs could represent not only hazardous effects to the lung itself but also to other tissues and organs, such as brain and kidneys. This study confirms that the main uptake route for GEM is the lungs and that, even at very low concentrations in the environment, a chronic exposure to Hg0 results in its bioaccumulation in the lung tissue. These results reinforce that biomonitoring studies should be combined with monitoring classical approaches in order to better characterize the risks of exposure to Hg0 in volcanic environments.
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Affiliation(s)
- R Camarinho
- Faculdade de Ciências E Tecnologia, Universidade Dos Açores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Açores, Portugal
- University of the Azores, 9501-801, Ponta Delgada, Portugal
| | - A Navarro-Sempere
- Department of Biotechnology, University of Alicante, Apart 99, 03080, Alicante, Spain
| | - P V Garcia
- Faculdade de Ciências E Tecnologia, Universidade Dos Açores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Açores, Portugal
- Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group, University of the Azores, 9501-801, Ponta Delgada, Azores, Portugal
| | - M García
- Department of Biotechnology, University of Alicante, Apart 99, 03080, Alicante, Spain
| | - Y Segovia
- Department of Biotechnology, University of Alicante, Apart 99, 03080, Alicante, Spain
| | - A S Rodrigues
- Faculdade de Ciências E Tecnologia, Universidade Dos Açores, Rua da Mãe de Deus, Apartado 1422, 9501-801, Ponta Delgada, Açores, Portugal.
- University of the Azores, 9501-801, Ponta Delgada, Portugal.
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7
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Liu H, You Z, Yang S, Liu C, Xie X, Xiang K, Wang X, Yan X. High-efficient adsorption and removal of elemental mercury from smelting flue gas by cobalt sulfide. Environ Sci Pollut Res Int 2019; 26:6735-6744. [PMID: 30632039 DOI: 10.1007/s11356-019-04159-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 01/03/2019] [Indexed: 06/09/2023]
Abstract
Nonferrous metal smelting produces a large amount of Hg0 in flue gas, which has caused serious damage to the environment and human health. In this work, amorphous cobalt sulfide was synthesized by a liquid-phase precipitation method and was used for capturing gaseous Hg0 from simulated smelting flue gas at low temperatures (50~150 °C). In the adsorption process, Hg0 can be transformed into the stable mercury compound, which is confirmed to be HgS by X-ray photoelectron spectroscopy (XPS) and temperature programmed desorption of Hg (Hg-TPD) analysis. Meanwhile, XPS results also demonstrate that S22- species on the surface of cobalt sulfide play an important role in Hg0 transformation. At the temperature of 50 °C (inlet Hg0 concentration of 214 μg·m-3), the Hg0 adsorption capacity of cobalt sulfide (penetration rate of 25%) is as high as 2.07 mg·g-1, which is much higher than that of popular adsorbents such as activated carbons and metal oxides. In addition, it was found that the Hg0 removal efficiency by cobalt sulfide in the flue gas with high concentration of SO2 (5%) remained more than 94%. The good adsorption and Hg0 removal performance guarantee cobalt sulfide the great superiority and application potential in the treatment of Hg0 in smelting flue gas with high concentration of SO2.
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Affiliation(s)
- Hui Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Central South University , Changsha, 410083, China
| | - Zhiwen You
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Shu Yang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Cao Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiaofeng Xie
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Kaisong Xiang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xiaoyang Wang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
| | - Xu Yan
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China.
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Central South University , Changsha, 410083, China.
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Yang R, Diao Y, Abayneh B. Removal of Hg 0 from simulated flue gas over silver-loaded rice husk gasification char. R Soc Open Sci 2018; 5:180248. [PMID: 30839732 PMCID: PMC6170578 DOI: 10.1098/rsos.180248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 07/31/2018] [Indexed: 06/09/2023]
Abstract
Mercury released into the atmosphere from coal combustion is harmful to humans and the environment. Rice husk gasification char (RHGC) is an industrial waste of biomass gasification power generation, which is silver-loaded to develop a novel and efficient sorbent for mercury removal from simulated flue gas. The experiment was carried out in a fixed-bed experimental system. The Hg0 adsorption performance of RHGC was improved significantly after loading silver. Hg0 adsorption capacity and mercury inlet concentration were found to be nonlinear. The adsorption capacity of RHGC decreased with the increase of reaction temperature. SO2 inhibited mercury removal, NO and HCl promoted mercury removal; the Hg0 adsorption capacity in the simulated flue gas was higher than that in pure N2. The silver-loaded rice husk gasification char (SRHGC) could be recycled about five times without significantly losing its removal efficiency. The SRHGC will not only reduce the cost of mercury removal but also save energy and reduce environmental pollution. At the same time, it provides a new way for the resource utilization of RHGC.
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Affiliation(s)
- Ru Yang
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
- College of Energy and Architectural engineering, Henan University of Urba Construction, Pingdingshan 467001, People's Republic of China
| | - Yongfa Diao
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
| | - Befkadu Abayneh
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
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Zhou C, Song Z, Yang H, Wu H, Wang B, Yu J, Sun L. Insight into elemental mercury (Hg 0) removal from flue gas using UV/H 2O 2 advanced oxidation processes. Environ Sci Pollut Res Int 2018; 25:21097-21105. [PMID: 29770935 DOI: 10.1007/s11356-018-2271-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/07/2018] [Indexed: 06/08/2023]
Abstract
Elemental mercury (Hg0) emitted from coal-fired power plants and municipal solid waste (MSW) incinerators has caused great harm to the environment and human beings. The strong oxidized •OH radicals produced by UV/H2O2 advanced oxidation processes were studied to investigate the performance of Hg0 removal from simulated flue gases. The results showed that when H2O2 concentration was 1.0 mol/L and the solution pH value was 4.1, the UV/H2O2 system had the highest Hg0 removal efficiency. The optimal reaction temperature was approximately 50 °C and Hg0 removal was inhibited when the temperature was higher or lower. The yield of •OH radicals during UV/H2O2 reaction was studied by electron paramagnetic resonance (EPR) analysis. UV radiation was the determining factor to remove Hg0 in UV/H2O2 system due to •OH generation during H2O2 decomposition. SO2 had little influence on Hg0 removal whereas NO had an inhibitory effect on Hg0 removal. The detailed findings for Hg0 removal reactions over UV/H2O2 make it an attractive method for mercury control from flue gases.
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Affiliation(s)
- Changsong Zhou
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China.
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China.
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, Jiangsu, China.
| | - Zijian Song
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Hongmin Yang
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Hao Wu
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Ben Wang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jie Yu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Lushi Sun
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China.
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10
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Xing Y, Li L, Lu P, Cui J, Li Q, Yan B, Jiang B, Wang M. Simultaneous purifying of Hg 0, SO 2, and NOx from flue gas by Fe 3+/H 2O 2: the performance and purifying mechanism. Environ Sci Pollut Res Int 2018; 25:6456-6465. [PMID: 29249033 DOI: 10.1007/s11356-017-0948-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 12/04/2017] [Indexed: 06/07/2023]
Abstract
Hg0, SO2, and NOx result in heavily global environmental pollution and serious health hazards. Up to now, how to efficiently remove mercury with SO2 and NOx from flue gas is still a tough task. In this study, series of high oxidizing Fenton systems were employed to purify the pollutants. The experimental results showed that Fe3+/H2O2 was more suitable to purify Hg0 than Fe2+/H2O2 and Cu2+/H2O2. The optimal condition includes Fe3+ concentration of 0.008 mol/L, Hg0 inlet concentration of 40 μg/m3, solution temperature of 50 °C, pH of 3, H2O2 concentration of 0.7 mol/L, and O2 percentage of 6%. When SO2 and NOx were taken into account under the optimal condition, Hg0 removal efficiency could be enhanced to 91.11% while the removal efficiency of both NOx and SO2 was slightly declined, which was consistent to the analysis of purifying mechanism. The removal efficiency of Hg0 was stimulated by accelerating the conversion of Fe2+ to Fe3+, which resulted from the existence of SO2 and NOx. The results of this study suggested that simultaneously purifying Hg0, SO2, and NOx from flue gas is feasible.
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Affiliation(s)
- Yi Xing
- School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Liuliu Li
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China.
| | - Pei Lu
- School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Jiansheng Cui
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China.
| | - Qianli Li
- Langfang Environmental Protection Bureau, Langfang, 065000, China
| | - Bojun Yan
- School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Bo Jiang
- School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Mengsi Wang
- School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
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11
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Xing Y, Yan B, Lu P, Cui X, Li L, Wang M. Purification of Hg 0 from flue gas by wet oxidation method and its mechanism: a review. Environ Sci Pollut Res Int 2017; 24:26310-26323. [PMID: 29063396 DOI: 10.1007/s11356-017-0480-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 10/12/2017] [Indexed: 06/07/2023]
Abstract
The vast majority of Hg2+ can be removed while elemental mercury (Hg0) can hardly be removed due to its characteristic of high volatility and insolubility in water. Till now, how to oxidize Hg0 to Hg2+ is the key for the purification of Hg0, especially when there are others pollutants, such as HCl, SO2, and NOx. In this review, the method and mechanism of Hg0 purification from flue gas by H2O2, KMnO4, NaClO2, and O3 are reviewed comprehensively. It is concluded that the oxidation of Hg0 mainly depends on the electronic supply efficiency from the solution. The Fenton reagent, composed of H2O2 and metal cations, is superior to O3 and the solution of KMnO4 and NaClO2. Moreover, HCl, SO2, and NOx in the flue gas can influence the oxidation and purification mechanism of Hg0. It is found that HCl in flue gas had obvious auxo-action on the oxidation of mercury, and SO2 and NOx have different effects on the oxidation of Hg0 with the change of compositions and concentration of pollutants in the flue gas. In general, SO2 and NOx can slightly promote the oxidation of Hg0 due to the synergistic effect.
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Affiliation(s)
- Yi Xing
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Bojun Yan
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Pei Lu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
- Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Xiaoxu Cui
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Liuliu Li
- School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China
| | - Mengsi Wang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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Ning P, Guo X, Wang X, Wang P, Ma Y, Lan Y. Removal of mercury (II), elemental mercury and arsenic from simulated flue gas by ammonium sulphide. Environ Technol 2015; 36:2691-2701. [PMID: 25965547 DOI: 10.1080/09593330.2015.1043355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A tubular resistance furnace was used as a reactor to simulate mercury and arsenic in smelter flue gases by heating mercury and arsenic compounds. The flue gas containing Hg(2+), Hg(0) and As was treated with ammonium sulphide. The experiment was conducted to investigate the effects of varying the concentration of ammonium sulphide, the pH value of ammonium sulphide, the temperature of ammonium sulphide, the presence of SO2 and the presence of sulphite ion on removal efficiency. The prepared adsorption products were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy. The results showed that the optimal concentration of ammonium sulphide was 0.8 mol/L. The optimal pH value of ammonium sulphide was 10, and the optimal temperature of ammonium sulphide was 20°C.Under the optimum conditions, the removal efficiency of Hg(2+), Hg(0) and As could reach 99%, 88.8%, 98%, respectively. In addition, SO2 and sulphite ion could reduce the removal efficiency of mercury and arsenic from simulated flue gas.
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Affiliation(s)
- Ping Ning
- a Faculty of Environmental Science and Engineering , Kunming University of Science and Technology , Kunming , 650500 , People's Republic of China
| | - Xiaolong Guo
- a Faculty of Environmental Science and Engineering , Kunming University of Science and Technology , Kunming , 650500 , People's Republic of China
| | - Xueqian Wang
- a Faculty of Environmental Science and Engineering , Kunming University of Science and Technology , Kunming , 650500 , People's Republic of China
| | - Ping Wang
- a Faculty of Environmental Science and Engineering , Kunming University of Science and Technology , Kunming , 650500 , People's Republic of China
| | - Yixing Ma
- a Faculty of Environmental Science and Engineering , Kunming University of Science and Technology , Kunming , 650500 , People's Republic of China
| | - Yi Lan
- a Faculty of Environmental Science and Engineering , Kunming University of Science and Technology , Kunming , 650500 , People's Republic of China
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