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제주시 지역 강수의 산성화 및 오염 특성 연구

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Alternative Title
Acidity and Pollution Characteristics of Precipitation in Jeju City during 2015-2016
Abstract
The collection of precipitation samples was made at Jeju area during 2015∼2016, and their major ionic components have been analyzed by ion chromatography. In the comparison of ion balance, electric conductivity, and acid fraction for the validation of analytical data, the correlation coefficients showed a good linear relationship within the range of 0.953∼0.991 During the study period, the volume-weighted mean pH and electric conductivity were 5.13 and 15.9 μS/cm respectively. The precipitation was weak acidic, showing high frequency of 43.8% in the range of pH 5.0-5.5. The ionic strength of precipitation was 0.2 ± 0.2 mM, indicating 44.5% of total precipitation within a pure precipitation criteria. The volume-weighted mean concentrations (μeq/L) of the ionic species in precipitation were in order of Cl^(-)>Na^(+)>NH_(4)^(+)>nss-SO_(4)^(2-)>NO_(3)^(-)>Mg^(2+)>nss-Ca^(2)>H^(+)>K^(+)>HCOO^(-)>CH_(3)COO^(-)>HCO_(3)^(-)>F^(-)>NO_(2)^(-)>CH_(3)SO_(3)^(-)>PO_(4)^(3-), The marine (Na^(+), Mg^(2+), Cl^(-)) and anthropogenic (NH_(4)^(+), nss-SO_(4)^(2-), NO_(3)^(-)) species have contributed to the total ionic components of precipitation samples
by 52.6% and 33.6%, respectively. NO_(3)^(-) and nss-SO_(4)^(2-) concentrations showed a distinct seasonality with higher concentration in winter compared to summer. The concentrations of Na^(+), Cl^(-), Mg^(2+), nss-Ca^(2+) increased in winter. The acidity contributions by sulfuric and nitric acids were 47.1% and 42.2%, respectively. The neutralization factors by NH_(4)^(+) and nss-Ca^(2+) were 0.44 and 0.21, respectively. The correlation coefficients
between Mg^(2+) and Cl^(-), Na^(+) and Cl^(-), NH_(4+) and nss-SO_(4)^(2-), NH_(4)^(+) and NO_(3)^(-), were 0.95, 1.00, 0.90, and 0.87, respectively. The clustered back trajectory analysis showed that the concentrations of precipitation components were relatively high when the air masses movede into Jeju Island from the China continent. On the other hand, their concentrations were lower when from the North Pacific Ocean.
Author(s)
이현준
Issued Date
2017
Awarded Date
2017. 8
Type
Dissertation
URI
http://dcoll.jejunu.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000008281
Alternative Author(s)
Lee, Hyun Jun
Affiliation
제주대학교 일반대학원
Department
대학원 화학과
Advisor
강창희
Table Of Contents
List of Tables ⅲ
List of Figures ⅳ
영문 초록 ⅴ
Ⅰ. 서 론 1
Ⅱ. 연구 방법 4
1. 측정기기 4
1) 강수 채취기 4
2) Ion Chromatography 4
3) pH Meter 및 Conductivity Meter 4
2. 연구방법 5
1) 시료채취 5
2) 시료분석 5
Ⅲ. 결과 및 고찰 9
1. 분석 데이터 QA/QC 9
1) 이온수지 비교 9
2) 전기전도도 비교 12
3) 산분율 비교 15
2. 강수성분 분석 결과 17
1) 강수성분의 농도 17
2) 계절별 강수성분 농도 22
3. 강수의 오염특성 29
1) 강수의 이온세기 29
2) 강수의 산성도 30
3) 산성화 기여도 평가 32
4) 중화 기여도 평가 34
5) 강수성분 발생기원 40
4. 강수성분의 유입경로 44
Ⅳ. 결 론 50
Ⅴ. 참고문헌 52
Degree
Master
Publisher
제주대학교 일반대학원
Citation
이현준. (2017). 제주시 지역 강수의 산성화 및 오염 특성 연구
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General Graduate School > Chemistry
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