Roles of chloride ion in photo-reduction/oxidation of mercury
详细信息 查看全文
- 作者：Rongguo Sun (1) (2)
Dingyong Wang (1) (3)
Wen Mao (1)
Shibo Zhao (1)
Cheng Zhang (1) (3) - 关键词：Mercury ; Photo ; reduction ; Photo ; oxidation ; Chloride ion ; Wavelength
- 刊名：Chinese Science Bulletin
- 出版年：2014
- 出版时间：September 2014
- 年：2014
- 卷：59
- 期：27
- 页码：3390-3397
- 全文大小：614 KB
- 参考文献：1. Selin NE, Jacob DJ, Yantosca RM et al (2008) Global 3-D land-ocean-atmosphere model for mercury: present-day versus preindustrial cycles and anthropogenic enrichment factors for deposition. Global Biogeochem Cycles 22:373-87
2. Wang F, Zhang J (2013) Mercury contamination in aquatic ecosystems under a changing environment: implications for the Three Gorges Reservoir. Chin Sci Bull 58:141-49 CrossRef
3. Orihel DM, Paterson MJ, Blanchfield PJ et al (2007) Experimental evidence of a linear relationship between inorganic mercury loading and methylmercury accumulation by aquatic biota. Environ Sci Technol 41:4952-958 CrossRef
4. Vost EE, Amyot M, O’Driscoll NJ (2012) Photoreactions of mercury in aquatic systems. In: Liu GL, Cai Y, O’Driscoll NJ (eds) Environmental chemistry and toxicology of mercury. Wiley, New Jersey, pp 193-18
5. Li Y, Cai Y (2013) Progress in the study of mercury methylation and demethylation in aquatic environments. Chin Sci Bull 58:177-85 CrossRef
6. Si L, Ariya PA (2008) Reduction of oxidized mercury species by dicarboxylic acids (C2–C4): kinetic and product studies. Environ Sci Technol 42:5150-155 CrossRef
7. Allard B, Arsenie I (1991) Abiotic reduction of mercury by humic substances in aquatic system: an important process for the mercury cycle. Water Air Soil Pollut 56:457-64 CrossRef
8. Lalonde JD, Amyot M, Kraepiel AM et al (2001) Photooxidation of Hg(0) in artificial and natural waters. Environ Sci Technol 35:1367-372 CrossRef
9. Amyot M, Morel FM, Ariya PA (2005) Dark oxidation of dissolved and liquid elemental mercury in aquatic environments. Environ Sci Technol 39:110-14 CrossRef
10. Matthiessen A (1998) Reduction of divalent mercury by humic substances: kinetic and quantitative aspects. Sci Total Environ 213:177-83 CrossRef
11. Whalin L, Kim EH, Mason R (2007) Factors influencing the oxidation, reduction, methylation and demethylation of mercury species in coastal waters. Mar Chem 107:278-94 CrossRef
12. Kunkely H, Horváth O, Vogler A (1997) Photophysics and photochemistry of mercury complexes. Coord Chem Rev 159:85-3 CrossRef
13. Zhang H (2006) Photochemical redox reactions of mercury. Struct Bond 120:37-9 CrossRef
14. Afaneh AT, Schreckenbach G, Wang F (2012) Density functional study of substituted (–SH, –S, –OH, –Cl) hydrated ions of Hg2+. Theor Chem Acc 131:1-7 CrossRef
15. Sun R, Wang D, Zhang Y et al (2013) Photo-degradation of monomethylmercury in the presence of chloride ion. Chemosphere 91:1471-476 CrossRef
16. Li Y, Mao Y, Liu G et al (2010) Degradation of methylmercury and its effects on mercury distribution and cycling in the Florida Everglades. Environ Sci Technol 44:6661-666 CrossRef
17. Schecher WD, McAwoy DC (2001) MINEQL+: a chemical equilibrium modeling system. Version 4.5, Environmental Research Software, Hallowell, Maine
18. Lin CJ, Pehkonen SO (1999) The chemistry of atmospheric mercury: a review. Atmos Environ 33:2067-079 CrossRef
19. Lalonde JD, Amyot M, Kraepiel AML et al (2001) Photooxidation of Hg(0) in artificial and natural waters. Environ Sci Technol 35:1367-372 CrossRef
20. Garcia E, Amyot M, Ariya PA (2005) Relationship between DOC photochemistry and mercury redox transformations in temperate lakes and wetlands. Geochim Cosmochim Acta 69:1917-924 CrossRef
21. Amyot M, McQueen DJ, Mierle G et al (1994) Sunlight-induced formation of dissolved gaseous mercury in lake waters. Environ Sci Technol 28:2366-371 CrossRef
22. O’Driscoll N, Siciliano S, Peak D et al (2006) The influence of forestry activity on the structure of dissolved organic matter in lakes: implications for mercury photoreactions. Sci Total Environ 366:880-93 CrossRef
23. Deng L, Fu D, Deng N (2009) Photo-induced transformations of mercury(II) species in the presence of algae, chlorella vulgaris. J Hazard Mater 164:798-05 CrossRef
24. Morelli E, Ferrara R, Bellini B et al (2009) Changes in the non-protein thiol pool and production of dissolved gaseous mercury in the marine diatom / Thalassiosira weissflogii under mercury exposure. Sci Total Environ 408:286-93 CrossRef
25. Zhang Y, Sun R, Ma M et al (2012) Study of inhibition mechanism of NO3 ?/sup> on photoreduction of Hg(II) in artificial water. Chemosphere 87:171-76 CrossRef - 作者单位：Rongguo Sun (1) (2)
Dingyong Wang (1) (3)
Wen Mao (1)
Shibo Zhao (1)
Cheng Zhang (1) (3)
1. Chongqing Key Laboratory of Soil Multi-scale Interfacial Process, College of Resource and Environment, Southwest University, Chongqing, 400715, China
2. School of Chemistry and Material, Guizhou Normal University, Guiyang, 550001, China
3. Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400716, China - ISSN：1861-9541
文摘
Photo-reduction of divalent mercury (Hg(II)) in aquatic systems plays a key role in global biogeochemistry cycling of mercury (Hg) in the Earth’s surface environment. The mechanisms of this process with various Cl?/sup> concentrations ([Cl?/sup>]) under different pH values and irradiation wavelength ranges are still unclear. In this work, photo-reduction and photo-oxidation experiments of Hg with different [Cl?/sup>] and pH values under various light conditions were conducted. The results show that photo-reduction rate constants of Hg(II) decrease with the increasing of [Cl?/sup>] in neutral solution under full light spectrum. Photo-reduction rate constants of Hg(II) with Cl?/sup> is highly dependent on Hg(II) species, which is determined by [Cl?/sup>] and pH value. Irradiation wavelength ranges have significant effects on reaction processes of photo-reduction of Hg(II) and photo-oxidation of Hg(0) in the presence of Cl?/sup>. When cut off ultraviolet (UV) radiation (280-00?nm), the reduction rate constants decrease without Cl?/sup>, and increase with higher [Cl?/sup>], and the photo-oxidation rates of Hg(0) decrease with or without Cl?/sup>. Except Cl?/sup> complexation stabilize the reducible Hg ions in solutions, photo-oxidation is an important reason for Cl?/sup> lowering photo-reduction rate of Hg(II). The results are of great importance for understanding the photo-redox characters of Hg(II) with Cl?/sup>.