The composition of the deicer sprayed on the highway is spreading over the highway by the scattering or snow removal activity, or car movement and consequently affecting the vegetation environment around the highway. These are the cause of the damage of fruit trees and crops, and also the cause of corrosion of highway structures. The goal of this study is to estimate the detected range of deicer components from a highway. The concentration of the deicer components in gauze and soil were investigated according to the crossing distance from the highway. The data collected were then used to estimate the concentration range of deicer components in a rage of distance up to 100 m from the highway where the deicer was spread. The sample time and weight of gauze were measured before and after installation, and the soil was collected at more than three points in parallel with the highway at the gauze installation point. The components in gauze and soil were investigated in addition to the deicer components (Ca2+, Na+, Cl-) as well as Mg2+ and K+. As Ca2+ and Cl- components of deicer were affected by agricultural use, Na+ component was selected as a tracer and further SAR (Sodium Adsorption Ratio) of soil was analyzed to examine the degree of influence on vegetation indirectly. The gauze concentration was evaluated by the concentration of the deicer ingredient at the background concentration of the blank gauze. The total amount of the deicer sprayed in the study road for 4 months (winter season) was about 93 ton/km. In the gauze test, the spread of the deicer was detected at a distance of 100 m in study area, but the concentration of the deicer in the gauze by distance decreased rapidly within 10 m from the highway. And concentration of the deicer components in gauze and soil came down after rainy season (August ~ Sep.). The results showed that the components of the deicer could be spread widely by the wind. The effective range of the deicer on vegetation based on SAR in soil was estimated to be less than 20 m from the highway. This study examines the concentration changes of the deicer components in gauze and soils and shows that deicer components sprayed on the highway are accumulated and moved over time by wind, snow removal, terrain, water system and land use around the highway.

• Sung Hyeon Cho(National Instrumentation Center for Environmental Management, Seoul National University, Seoul, Korea)
• Goon Taek Lee(National Instrumentation Center for Environmental Management, Seoul National University, Seoul, Korea)
• Byeong Duk Lee(Expressway & Transportation Research Institute, Korea Expressway Corporation, Kyeonggi, Korea)
• Jin Hwan Kim(Expressway & Transportation Research Institute, Korea Expressway Corporation, Kyeonggi, Korea)
• Do Soon Kim(College of Agriculture and Life Sciences, Seoul National University, Seoul, Korea)
• So Young Moon(National Instrumentation Center for Environmental Management, Seoul National University, Seoul, Korea)
• Dong Guen Lee(National Instrumentation Center for Environmental Management, Seoul National University, Seoul, Korea)
• Jeong Min Choi(National Instrumentation Center for Environmental Management, Seoul National University, Seoul, Korea)
• Jun Young Kim(National Instrumentation Center for Environmental Management, Seoul National University, Seoul, Korea)