Monthly Characteristics of Rainwater Chemistry at a Coastal Site in Southwestern Japan

Toyonaga, Satoshi; Zhang, Daizhou

doi:10.5572/ajae.2017.11.2.071

Cited by 2 publications

(1 citation statement)

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“…Precipitation plays an important role in the chemical reaction and removal of chemical species in the atmosphere, and the removal of atmospheric pollutants affects the pH and chemical composition . The acidification of precipitation is closely related to the increase in the use of fossil fuels, and it is recognized as a product of rapid industrialization and economic growth.…”

Section: Introductionmentioning

confidence: 99%

Chemical Characterization of Precipitation by Air Pollutants on Jeju Island in Korea during 2015–2016

Song

Kim

et al. 2019

Bulletin Korean Chem Soc

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Precipitation samples were collected in the Jeju Island during 2015-2016, and the ionic components of the precipitation were analyzed to investigate the chemical composition and pollution characteristics of the precipitation. In a comparison of ion balance, electrical conductivity, and acid fraction for verification of the analytical data, the correlation coefficients showed within the range of 0.953-0.991. During the study period, the volume-weighted mean pH and electrical conductivity were 5.1 and 15.9 μS/cm, respectively. The precipitation was weakly acidic, with a high frequency of precipitation (43.8%) in the range of pH 5.0-5.5. The ionic strength of the precipitation was 0.2 AE 0.2 mM, indicating that 44.5% of the total precipitation was within the pure precipitation criteria. The volume-weighted mean concentrations (μeq/L) of the ionic components in the precipitation were in order of Cl − > Na + > NH 4. Sea salt (Cl − , Na + , Mg 2+ ) and secondary pollutants (NH 4 + , nss-SO 4 2− , NO 3 − ) contributed to the total ionic species in the precipitation samples by 52.6% and 33.6%, respectively. The acidity contributions by inorganic (nss-SO 4 2− , NO 3 − ) and organic (HCOO − , CH 3 COO − ) acids were 89.3% and 10.7%, respectively. The neutralization factors by ammonium and calcium carbonate were 0.44 and 0.21, respectively. A clustered back trajectory analysis showed that the concentrations of secondary pollutants were relatively high when airflow moved to Jeju Island from the China continent.

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Section: Introductionmentioning

confidence: 99%