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@article{1639297,
author = {Kim, K. and Ju, J. and Kim, B. and Chung, H.Y. and Vetráková, Ľubica and Heger, Dominik and SaizandLopez, A. and Choi, W. and Kim, J.},
article_location = {WASHINGTON},
article_number = {9},
doi = {http://dx.doi.org/10.1021/acs.est.8b06638},
keywords = {NITROUS-ACID; UNFROZEN SOLUTION; SEA-SURFACE; EMISSIONS; WATER; ICE; CHEMISTRY; OXIDATION; SEAWATER; SNOW},
language = {eng},
issn = {0013-936X},
journal = {ENVIRONMENTAL SCIENCE & TECHNOLOGY},
title = {Nitrite-Induced Activation of Iodate into Molecular Iodine in Frozen Solution},
url = {http://dx.doi.org/10.1021/acs.est.8b06638},
volume = {53},
year = {2019}
}
TY - JOUR
ID - 1639297
AU - Kim, K. - Ju, J. - Kim, B. - Chung, H.Y. - Vetráková, Ľubica - Heger, Dominik - Saiz-Lopez, A. - Choi, W. - Kim, J.
PY - 2019
TI - Nitrite-Induced Activation of Iodate into Molecular Iodine in Frozen Solution
JF - ENVIRONMENTAL SCIENCE & TECHNOLOGY
VL - 53
IS - 9
SP - 4892-4900
EP - 4892-4900
PB - AMER CHEMICAL SOC
SN - 0013936X
KW - NITROUS-ACID
KW - UNFROZEN SOLUTION
KW - SEA-SURFACE
KW - EMISSIONS
KW - WATER
KW - ICE
KW - CHEMISTRY
KW - OXIDATION
KW - SEAWATER
KW - SNOW
UR - http://dx.doi.org/10.1021/acs.est.8b06638
L2 - http://dx.doi.org/10.1021/acs.est.8b06638
N2 - A new mechanism for the abiotic production of molecular iodine (I-2) from iodate (IO3-), which is the most abundant iodine species, in dark conditions was identified and investigated. The production of I-2 in aqueous solution containing IO3- and nitrite (NO2-) at 25 degrees C was negligible. However, the redox chemical reaction between IO3- and NO2- rapidly proceeded in frozen solution at -20 degrees C, which resulted in the production of I-2, I-, and NO3-. The rapid redox chemical reaction between IO3- and NO2- in frozen solution is ascribed to the accumulation of IO3-, NO2-, and protons in the liquid regions between ice crystals during freezing (freeze concentration effect). This freeze concentration effect was verified by confocal Raman microscopy for the solute concentration and UV-visible absorption spectroscopy with cresol red (acid-base indicator) for the proton concentration. The freezing-induced production of I-2 in the presence of IO3- and NO2- was observed under various conditions, which suggests this abiotic process for I-2 production is not restricted to a specific region and occurs in many cold regions. NO2--induced activation of IO3- to I-2 in frozen solution may help explain why the measured values of iodine are larger than the modeled values in some polar areas.
ER -
KIM, K., J. JU, B. KIM, H.Y. CHUNG, Ľubica VETRÁKOVÁ, Dominik HEGER, A. SAIZ-LOPEZ, W. CHOI a J. KIM. Nitrite-Induced Activation of Iodate into Molecular Iodine in Frozen Solution. \textit{ENVIRONMENTAL SCIENCE \&{}amp; TECHNOLOGY}. WASHINGTON: AMER CHEMICAL SOC, 2019, roč.~53, č.~9, s.~4892-4900. ISSN~0013-936X. Dostupné z: https://dx.doi.org/10.1021/acs.est.8b06638.
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