[논문]고속도로 주변 토양의 나트륨흡착비(SAR)를 이용한 제설제 분포 추적

조성현; 이동근; 신건환; 최천일; 이군택; 김도순; 이병덕

doi:10.7857/jsge.2022.27.3.022

고속도로 주변 토양의 나트륨흡착비(SAR)를 이용한 제설제 분포 추적
Tracing the Distribution of Deicer around Highway Areas using Sodium Adsorption Ratio (SAR) of Soil 원문보기

지하수토양환경 = Journal of soil and groundwater environment, v.27 no.3, 2022년, pp.22 - 40

조성현 (서울대학교 농생과학공동기기원) , 이동근 (서울대학교 농생과학공동기기원) , 신건환 (서울대학교 농생과학공동기기원) , 최천일 (서울대학교 농생과학공동기기원) , 이군택 (서울대학교 농생과학공동기기원) , 김도순 (서울대학교 농림생물자원학부) , 이병덕 (한국도로공사 도로교통연구원)

Abstract ▼ AI-Helper

The goal of this study was to estimate the possible scattering distance of deicer from the highway and the impact range of deicer on soil quality in terms of plant growth. Among the major elements (Ca2+, Cl- and Na+) of deicer, Ca2+and Cl- are usually applied as fertilizer to soil. Therefore both elements (Ca2+and Cl-) were not appropriate for a tracer of deicer at the agricultural area. In this study, SAR (sodium adsorption ratio) of soil was proposed as an alternative tracer to confirm the distribution of the deicer around the highway areas. Because deicer is the main anthropogenic source of Na+ around the highway areas and does harm to the physical properties of soil and plant growth through the destruction of soil aggregate, SAR would be an recommendable tracer to access the distribution of deicer as well as adverse effect on soil quality at highway areas. The influence range of deicer based on SAR of soil was estimated to be less than 20 m distance from the highway even though the possible flying distance of deicer was found to be more than 100 m from the highway. However the deicer seriously deposited within 10 m from the highway.

주제어

표/그림 (15)

그림 Fig. 1. The map showing sampling points (a), elevation (b), wind rose of winter season (c), wind rose of non-winter (d) at the study site.
그림 Fig. 2. The graph showing traffic volume and vehicle speed (a), amount of snowfall and applied deicer (b) during the study periods.
표 Table 1. Average concentration of pH, EC, and deicer elements in gauze according to distance from highway during two seasons
표 Table 2. Average concentration of pH, EC, and deicer elements in soil according to distance from highway during two seasons
그림 Fig. 3. pH, EC and concentration of deicer elements in gauze during 1^st season (a) and 2^nd season (b).
그림 Fig. 3. continued.
그림 Fig. 3. continued.
그림 Fig. 3. continued.
그림 Fig. 4. pH, EC and concentration of deicer elements in soil during 1^st season (a) and 2^nd season (b).
그림 Fig. 4. continued.
그림 Fig. 4. continued.
그림 Fig. 4. continued.
표 Table 3. Number of soil samples by salinity-accumulating soil classification (Brady and Weil, 2002)
표 Table 4. Correlation coefficients of pH, EC, Ca²⁺, Na⁺, Cl^-, and Mg²⁺ in gauze and soil
그림 Fig. 5. The estimation of affected range of deicer at the study area. (a) The diffusion distance of deicer through scattering according to EC (electrical conductivity) in gauze and (b) the distribution of deicer elements according to SAR (sodium adsorption ratio) of soil samples.

AI 본문요약
AI-Helper

문제 정의

그러므로 본 연구의 주요 목적은 고속도로 주변 농경지에도 적용 가능한 토양의 SAR을 추적 지표로 선택하여 제설제 성분의 비산 가능 거리와 고속도로부터 이격거리에 따른 토양의 SAR 변화양상을 파악하여 제설제 유입에 따른 농업용지로서 토양의 질(SAR 13 초과 여부 확인) 저하로 인한 식물생육 피해 가능 영향범위를 파악하는 것이다.

제안 방법

제설제의 비산 범위는 고속도로 주변에 거리별로 이격하여 설치된 거즈를 수거하여 평가하였다. 설치 전 거즈 중의 제설제 성분 농도를 미리 분석하고 수거된 거즈에서 검출된 제설제 성분의 농도가 설치 전의 농도를 초과하는 경우 해당 지점까지 제설제가 확산된 것으로 규정하였다.

이론/모형

설치 전 거즈 중의 제설제 성분 농도를 미리 분석하고 수거된 거즈에서 검출된 제설제 성분의 농도가 설치 전의 농도를 초과하는 경우 해당 지점까지 제설제가 확산된 것으로 규정하였다. 고속도로에 살포된 제설제가 주변 토양에 유입되어 분포하는 양상을 확인하기 위하여 나트륨 흡착비(이하 SAR) 를 평가하였다 (Wilcox, 1955). 일반적인 토양에서는 칼슘의 함량이 나트륨 성분보다 높고 농업 활동에서 나트륨 성분을 추가로 토양에 처리하는 경우는 없기 때문에 소금 (염화나트륨) 기반의 제설제의 토양 유입을 평가함에 있어 SAR이 유용한 지표가 될 것으로 판단하였다.

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