ISSN:
1573-2932
Keywords:
acidic deposition
;
acidification
;
aluminum
;
atmosphericdeposition
;
Bohemia
;
Czech Republic
;
fluoride
;
lake
;
trace metal
;
trace element
;
reversibility
;
restoration
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract The concentrations of Al, Be, Cd, Cu, F, Fe, Mn, Pb, and Zn were monitored in five glacial lakes and one man-made lake in the southwestern part of the Czech Republic. The lakes had median pHs of 4.4 to 6.5 during 1984 to 1995. Decreases in the concentrations of Mn and Pb occurred in five acidified lakes. The concentrations of AlT, Be, Cd, and F decreased in the four chronically acidified lakes, Zn decreased in two lakes. Concentrations of Cu and Fe remained unchanged. The decreases in Be, Mn, and Zn concentrations were proportional to the decrease in CSA (CSA = SO4 2- + NO3 -+ Cl-); decreases in AlT, Cd, and Pb concentrations were proportionately higher, while F was lower. The greater decrease in the Pb concentrations (61 to 79%, at a rate up to 0.15 μg L-1yr-1) was caused by pronounced decreases in deposition of Pb derived from mobile sources. The decrease of AlT concentrations was dominated by a decrease in Al3+, whose concentration decreased by 51 to 86%. The concentrations of complexes Al(OH)2+, Al(OH)2 +, AlF2+, and AlH3SiO4 2+ also decreased. The decrease in the concentrations of inorganic forms of Al (Ali) compensated 65% of the decrease in CSA. The Cd concentrations were highly variable in the years 1986 to 1988 because of variable amounts of accumulation on particles.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1005007627334
