Evaluating the role of re-adsorption of dissolved Hg2+ during cinnabar dissolution using isotope tracer technique
Abstract
Cinnabar dissolution is an important factor controlling mercury (Hg) cycling. Recent studies have suggested the co-occurrence of re-adsorption of the released Hg during the course of cinnabar dissolution. However, there is a lack of feasible techniques that can quantitatively assess the amount of Hg re-adsorbed on cinnabar when investigating cinnabar dissolution. In this study, a new method, based on isotope tracing and dilution techniques, was developed to study the role of Hg re-adsorption in cinnabar dissolution. The developed method includes two key components: (1) accurate measurement of both released and spiked Hg in aqueous phase and (2) estimation of re-adsorbed Hg on cinnabar surface via the reduction in spiked 202Hg2+. By adopting the developed method, it was found that the released Hg for trials purged with oxygen could reach several hundred g L–1, while no significant cinnabar dissolution was detected under anaerobic condition. Cinnabar dissolution rate when considering Hg re-adsorption was approximately 2 times the value calculated solely with the Hg detected in the aqueous phase. Lastly, these results suggest that ignoring the Hg re-adsorption process can significantly underestimate the importance of cinnabar dissolution, highlighting the necessity of applying the developed method in future cinnabar dissolution studies.
- Authors:
-
- Florida Intl Univ., Miami, FL (United States)
- Ocean Univ. of China, Qingdao (China)
- Fujian Agriculture and Forestry Univ., Fuzhou (China)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1327774
- Alternate Identifier(s):
- OSTI ID: 1325375
- Grant/Contract Number:
- AC05-00OR22725; FG01-05EW07033
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Hazardous Materials
- Additional Journal Information:
- Journal Volume: 317; Journal Issue: C; Journal ID: ISSN 0304-3894
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 07 ISOTOPE AND RADIATION SOURCES; cinnabar dissolution; Hg re-adsorption on cinnabar surface; isotope tracer technique; isotope dilution; redox condition
Citation Formats
Jiang, Ping, Li, Yanbin, Liu, Guangliang, Yang, Guidi, Lagos, Leonel, Yin, Yongguang, Gu, Baohua, Jiang, Guibin, and Cai, Yong. Evaluating the role of re-adsorption of dissolved Hg2+ during cinnabar dissolution using isotope tracer technique. United States: N. p., 2016.
Web. doi:10.1016/j.jhazmat.2016.05.084.
Jiang, Ping, Li, Yanbin, Liu, Guangliang, Yang, Guidi, Lagos, Leonel, Yin, Yongguang, Gu, Baohua, Jiang, Guibin, & Cai, Yong. Evaluating the role of re-adsorption of dissolved Hg2+ during cinnabar dissolution using isotope tracer technique. United States. https://doi.org/10.1016/j.jhazmat.2016.05.084
Jiang, Ping, Li, Yanbin, Liu, Guangliang, Yang, Guidi, Lagos, Leonel, Yin, Yongguang, Gu, Baohua, Jiang, Guibin, and Cai, Yong. Thu .
"Evaluating the role of re-adsorption of dissolved Hg2+ during cinnabar dissolution using isotope tracer technique". United States. https://doi.org/10.1016/j.jhazmat.2016.05.084. https://www.osti.gov/servlets/purl/1327774.
@article{osti_1327774,
title = {Evaluating the role of re-adsorption of dissolved Hg2+ during cinnabar dissolution using isotope tracer technique},
author = {Jiang, Ping and Li, Yanbin and Liu, Guangliang and Yang, Guidi and Lagos, Leonel and Yin, Yongguang and Gu, Baohua and Jiang, Guibin and Cai, Yong},
abstractNote = {Cinnabar dissolution is an important factor controlling mercury (Hg) cycling. Recent studies have suggested the co-occurrence of re-adsorption of the released Hg during the course of cinnabar dissolution. However, there is a lack of feasible techniques that can quantitatively assess the amount of Hg re-adsorbed on cinnabar when investigating cinnabar dissolution. In this study, a new method, based on isotope tracing and dilution techniques, was developed to study the role of Hg re-adsorption in cinnabar dissolution. The developed method includes two key components: (1) accurate measurement of both released and spiked Hg in aqueous phase and (2) estimation of re-adsorbed Hg on cinnabar surface via the reduction in spiked 202Hg2+. By adopting the developed method, it was found that the released Hg for trials purged with oxygen could reach several hundred g L–1, while no significant cinnabar dissolution was detected under anaerobic condition. Cinnabar dissolution rate when considering Hg re-adsorption was approximately 2 times the value calculated solely with the Hg detected in the aqueous phase. Lastly, these results suggest that ignoring the Hg re-adsorption process can significantly underestimate the importance of cinnabar dissolution, highlighting the necessity of applying the developed method in future cinnabar dissolution studies.},
doi = {10.1016/j.jhazmat.2016.05.084},
journal = {Journal of Hazardous Materials},
number = C,
volume = 317,
place = {United States},
year = {Thu Jun 02 00:00:00 EDT 2016},
month = {Thu Jun 02 00:00:00 EDT 2016}
}
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