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- E-ISSN 2288-8985
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Ionic composition and pollution characteristics of precipitation in Jeju Island during 2009-2014
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2016, v.29 no.1, pp.19-28
https://doi.org/10.5806/AST.2016.29.1.19
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(2016). Ionic composition and pollution characteristics of precipitation in Jeju Island during 2009-2014. Analytical Science and Technology, 29(1), 19-28, https://doi.org/10.5806/AST.2016.29.1.19
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Abstract
The objective of this study was to determine the acidification of precipitation in the Jeju area. Precipitation samples were collected from the Jeju area from 2009-2014, and the major ionic species were analyzed. In the regression analysis, through a comparison of ion balance, electric conductivity, and acid fraction, the correlation coefficients showed a good linear relationship within the range of 0.927~0.983. The volumeweighted means of the pH and electric conductivity were 4.9 and 22.7 μS/cm, respectively. The ionic strength of precipitation was 0.27±0.38 mM, indicating about 35.9 % of total precipitation within the pure precipitation criteria. The volume-weighted mean concentrations (ìeq/L) of the ionic species in the precipitation were in the order of Na+ > Cl− > nss-SO4 2− > NO3 − > NH4 + > Mg2+ > H+ > nss-Ca2+ > PO4 3− > K+ > HCOO− > CH3COO− > NO2 − > F− > HCO3 − > CH3SO3 −. The acidification contributions by sulfuric and nitric acids were 54.5 % and 36.5 %, respectively. Meanwhile the acidification contributions by formic and acetic acids were 4.8 % and 4.2 %, respectively. Thus, it was found that the acidification of the precipitation in the Jeju area was mainly due to the inorganic acids. The neutralization factors by NH3 and CaCO3 were also 33 % and 20 %, respectively.
- keywords
- precipitation, Jeju Island, acidification contribution, neutralization factor
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