The heterogeneous reactivity of gaseous nitric acid on authentic mineral dust samples, and on individual mineral and clay mineral components

被引：67

作者：

Hanisch, F ^{[1
]}

Crowley, JN ^{[1
]}

机构：

[1] Max Planck Inst Chem, Div Atmospher Chem, D-55020 Mainz, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2001年 / 3卷 / 12期

关键词：

D O I：

10.1039/b101700o

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The heterogeneous reaction between HNO3 and various authentic dust, mineral and day mineral surfaces has been investigated by means of the Knudsen reactor technique at approximate to 296 K. Authentic dust surfaces from both the Saharan and Chinese dust regions were investigated, as were the minerals and clay minerals: kaolinite, ripidolite, illite, illite/smectite, Ca-montmorillonite, Na-montmorillonite. palygorskite, dolomite and orthoclase. A modified Knudsen reactor design and HNO3 concentrations as low as 10(9) cm(-3) helped eliminate experimental artefacts. In all cases a large and irreversible uptake was observed. with uptake coefficients ranging from 8.1 x 10(-2)(orthoclase) to 19.6 x 10(-2) (palygorskite). These results strongly suggest that mineral dust can modify tropospheric photochemical cycles involving NOx and NOy.

引用

页码：2474 / 2482

页数：9

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