TY - JOUR
T1 - Measurement of Atmospheric Mercury
T2 - Current Limitations and Suggestions for Paths Forward
AU - Gustin, Mae Sexauer
AU - Dunham-Cheatham, Sarrah M.
AU - Lyman, Seth
AU - Horvat, Milena
AU - Gay, David A.
AU - Gačnik, Jan
AU - Gratz, Lynne
AU - Kempkes, Geyan
AU - Khalizov, Alexei
AU - Lin, Che Jen
AU - Lindberg, Steven E.
AU - Lown, Livia
AU - Martin, Lynwill
AU - Mason, Robert Peter
AU - MacSween, Katrina
AU - Vijayakumaran Nair, Sreekanth
AU - Nguyen, Ly Sy Phu
AU - O’Neil, Trevor
AU - Sommar, Jonas
AU - Weiss-Penzias, Peter
AU - Zhang, Lei
AU - Živković, Igor
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/7/23
Y1 - 2024/7/23
N2 - Mercury (Hg) researchers have made progress in understanding atmospheric Hg, especially with respect to oxidized Hg (HgII) that can represent 2 to 20% of Hg in the atmosphere. Knowledge developed over the past ∼10 years has pointed to existing challenges with current methods for measuring atmospheric Hg concentrations and the chemical composition of HgII compounds. Because of these challenges, atmospheric Hg experts met to discuss limitations of current methods and paths to overcome them considering ongoing research. Major conclusions included that current methods to measure gaseous oxidized and particulate-bound Hg have limitations, and new methods need to be developed to make these measurements more accurate. Developing analytical methods for measurement of HgII chemistry is challenging. While the ultimate goal is the development of ultrasensitive methods for online detection of HgII directly from ambient air, in the meantime, new surfaces are needed on which HgII can be quantitatively collected and from which it can be reversibly desorbed to determine HgII chemistry. Discussion and identification of current limitations, described here, provide a basis for paths forward. Since the atmosphere is the means by which Hg is globally distributed, accurately calibrated measurements are critical to understanding the Hg biogeochemical cycle.
AB - Mercury (Hg) researchers have made progress in understanding atmospheric Hg, especially with respect to oxidized Hg (HgII) that can represent 2 to 20% of Hg in the atmosphere. Knowledge developed over the past ∼10 years has pointed to existing challenges with current methods for measuring atmospheric Hg concentrations and the chemical composition of HgII compounds. Because of these challenges, atmospheric Hg experts met to discuss limitations of current methods and paths to overcome them considering ongoing research. Major conclusions included that current methods to measure gaseous oxidized and particulate-bound Hg have limitations, and new methods need to be developed to make these measurements more accurate. Developing analytical methods for measurement of HgII chemistry is challenging. While the ultimate goal is the development of ultrasensitive methods for online detection of HgII directly from ambient air, in the meantime, new surfaces are needed on which HgII can be quantitatively collected and from which it can be reversibly desorbed to determine HgII chemistry. Discussion and identification of current limitations, described here, provide a basis for paths forward. Since the atmosphere is the means by which Hg is globally distributed, accurately calibrated measurements are critical to understanding the Hg biogeochemical cycle.
KW - calibration
KW - dual-channel systems
KW - mass spectrometry
KW - monitoring networks
KW - reactive mercury active system
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U2 - 10.1021/acs.est.4c06011
DO - 10.1021/acs.est.4c06011
M3 - Review article
C2 - 38982755
AN - SCOPUS:85198348363
SN - 0013-936X
VL - 58
SP - 12853
EP - 12864
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 29
ER -