РОССИЙСКАЯ АКАДЕМИЯ НАУК

УРАЛЬСКОЕ ОТДЕЛЕНИЕ

ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА
   
| | | | |
| | | |
 05.03.2007   Карта сайта     Language По-русски По-английски
Новые материалы
Экология
Электротехника и обработка материалов
Медицина
Статистика публикаци


05.03.2007



Surface attack by pollutants



02 March 2007



Fundamental surface chemistry gives new insight into the way acid rain attacks limestone.


The reaction of carbonate surfaces with the gaseous pollutant sulfur dioxide plays a role in atmospheric chemistry and in the accelerated degradation of limestone buildings and monuments.



"We are very much interested in connecting fundamental molecular surface chemistry to global impacts"
- Vicki Grassian

To understand these processes on a molecular level, Vicki Grassian and colleagues at the University of Iowa, Iowa City, US, studied laboratory reactions of sulfur dioxide on calcium carbonate surfaces, using several different analytical techniques, in the presence and absence of water.


The researchers found that adsorbed water increased the amount of sulfur adsorbed onto the carbonate surface by up to thirteen times, because of increased mobility of the surface ions.


Sulfur was present on the surface as sulfite and sulfate ions. Initially, the two ions were present in equal measure, but adding water increased the ratio of sulfite to sulphate to five to one, by allowing islands of sulfite to form on the surface.


 


Weathered limestone








Acid rain leaves limestone buildings crumbling



 


Brian Mitchell, an astrochemist from the University of Rennes, France, said the findings are of great significance. 'In cities, buildings and statues are attacked by acid rain. This study serves to indicate the character of this attack and the conditions where it is accentuated,' said Mitchell.


'If atmospheric chemistry models are to accurately describe the chemistry of the troposphere, laboratory studies designed to understand the mechanisms of these reactions as well as determining accurate kinetics of these reactions are needed. We are very much interested in connecting fundamental molecular surface chemistry to global impacts,' said Grassian. 


Joanna Stevens




Link to journal article



Reactions of sulfur dioxide on calcium carbonate single crystal and particle surfaces at the adsorbed water carbonate interface
Jonas Baltrusaitis, Courtney R. Usher and Vicki H. Grassian, Phys. Chem. Chem. Phys., 2007
DOI: 10.1039/b617697f


Дизайн и программирование N-Studio 
А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

  • © 2004-2019 ИХТТ УрО РАН
    беременность, мода, красота, здоровье, диеты, женский журнал, здоровье детей, здоровье ребенка, красота и здоровье, жизнь и здоровье, секреты красоты, воспитание ребенка рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок медицина, клиники и больницы, болезни, врач, лечение, доктор, наркология, спид, вич, алкоголизм православные знакомства, православный сайт творчeства, православные рассказы, плохие мысли, православные психологи рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок