Effects of NO2 on oxidation mechanisms of atmospheric pollutant SO2 over Baumberger sandstone

被引：23
作者：
Bai, Y
Thompson, GE
Martinez-Ramirez, S
机构：
[1] CSIC, Inst Ciencias Construcc Eduardo Torroja, Madrid 28033, Spain
[2] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada
[3] Univ Manchester, Inst Sci & Technol, Ctr Corros & Protect, Manchester M60 1QD, Lancs, England
来源：
BUILDING AND ENVIRONMENT | 2006年 / 41卷 / 04期
基金：
英国工程与自然科学研究理事会;
关键词：
pollutant gas; atmospheric degradation; chamber exposure; presentation rate; Baumberger sandstone;
D O I：
10.1016/j.buildenv.2005.02.007
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The influence of NO2 on oxidation of atmospheric pollutant gas SO2 has been studied through Baumberger sandstone degradation. Experiments were conducted in a set of laboratory atmospheric chambers. By exposure of stone specimens to various pollutant regimes, e.g. single and combined pollutant gases (SO2, NO2), the reaction products (i.e. nitrite, nitrate, sulphite and sulphate) collected from run-off solutions as well as extracted from stones were analysed. Presentation rates of pollutant gases in terms of mg/cm(2) s have been used to assess the interaction of SO2 and NO2 pollutant gases with Baumberger sandstone. For the first time, the contribution of NO2 to SO2 oxidation over the sample surface has been quantified (e.g. 37% in dry surface condition and 9% in wet surface condition). SO2 oxidation over Baumberger sandstone in the presence of NO2 produces nitrates over the surface of the sample; however, when no sandstone is present no NO2 oxidation is produced. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：486 / 491
页数：6
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