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  • 09월 06일 15시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제112회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Na+, F-, Br- and Cl- on ice surface: Theoretical Studies of Dissolution and Ion Segregation Processes

2013년 8월 20일 14시 57분 01초
PHYS.P-264 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 16일 (수요일) 16:00~19:00
저자 및
Shoaib Mahbubul alam, 최철호1,*
경북대학교 일반대학원 화학과, Korea
1경북대학교 화학과, Korea
By the Antarctic Ozone Hole discovery and the recognition of dominant role of the atmospheric ice particle in the chemical composition of the atmosphere determination, the interest of the chemical reactions between gases and ice surface has raised extensively. In the troposphere, reactions between sea-salt aerosols and ice particles with ozone and organic species are considered to play a significant role to produce reactive halogen species. Water-solvated Cl- and F- anions have been the subject of many other theoretical studies and several relevant experimental studies Reactions involving halogen anions at the interface between air and the concentrated salt solution comprising the aerosol particles have been proposed to be responsible for the release of reactive halogens into the atmosphere. Ice surface is different from liquid water surface. Liquid water and ice crystals have very different solubilities for foreign ions, and therefore the distribution of ions near the surface of crystalline ice may differ from that for liquid water. We observed the adsorption phenomena of cations and anaions such as Halides on ice surface and the rearrangement of Hydrogen bonding network after adsorption of ions on ice surface. It was found that Positive (Na+) ion can easily attach on ice surface. The rearrangement of Hydrogen bonding network occurs after adsorption of ions on ice surface. Negative ions like Cl-, Br- prefer H2 and H3 adsorption sites rather than H1 and H2 sites. We assumed that instead of F-, molecular HF formed on the ice surface which eventually migrates into the interior of ice surface.