Seasonal variation in dissolved gaseous mercury and total mercury concentrations in Juam Reservoir, Korea.
Dissolved gaseous mercury (DGM) and total mercury (TM) concentrations were measured in Juam Reservoir, Korea. DGM concentrations were higher in spring (64+/-13pgL(-1)) and summer (109+/-15pgL(-1)), and lower in fall (20+/-2pgL(-1)) and winter (23+/-6pgL(-1)). In contrast, TM concentrations were higher in fall (3.2+/-0.1ngL(-1)) and winter (3.3+/-0.1ngL(-1)) than in spring (2.3+/-0.1ngL(-1)) and summer (2.2+/-0.4ngL(-1)). DGM concentrations were correlated with water temperature (p<0.0001), ORP (p<0.0001), UV intensity (UV-A: p=0.008; UV-B: p=0.003), and DOC concentration (p=0.0107). DGM concentrations varied diurnally with UV intensity. The average summer DGM (109+/-15pgL(-1)) and TM (2.2+/-0.4ngL(-1)) concentrations in Juam Reservoir were higher than the averages for North American lakes (DGM=38+/-16pgL(-1); TM=1.0+/-1.2ngL(-1)), but lower than levels reported for Baihua Reservoir in China.
Park
Jong-Sung
JS
Institute of Health & Environment, School of Public Health, Seoul National University, 28 YeonGeon-Dong, Jongro-Gu, Seoul 110-799, South Korea.
Oh
Sehee
S
Shin
Mi-Yeon
MY
Kim
Moon-Kyung
MK
Yi
Seung-Muk
SM
Zoh
Kyung-Duk
KD
D002244:Carbon / Q000032:analysis; D002681:China; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D005618:Fresh Water; D005740:Gases; D007723:Korea; D008628:Mercury / Q000032:analysis*; D012621:Seasons; D012995:Solubility; D013696:Temperature; D014466:Ultraviolet Rays; D014481:United States; D014874:Water Pollutants, Chemical / Q000032:analysis*
D005740:Gases; D014874:Water Pollutants, Chemical; D002244:Carbon; D008628:Mercury