The near-UV absorption constants for nitrite ion in aqueous solution

被引：57

作者：

Zuo, YG ^{[1
]}

Deng, YW

机构：

[1] Florida Int Univ, SE Environm Res Program, Miami, FL 33199 USA

[2] Florida Int Univ, Dept Chem, Miami, FL 33199 USA

来源：

CHEMOSPHERE | 1998年 / 36卷 / 01期

基金：

美国国家科学基金会;

关键词：

nitrite; molar absorptivity; photolysis; hydroxyl radical; surface seawater; atmospheric water;

D O I：

10.1016/S0045-6535(97)10028-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The UV decadic molar absorptivities of nitrite ion in water were determined between 290 and 400 nm in 2-nm increments. The measured maximum absorptivity of 22.93 M cm(-1) at 354 nm is in agreement with previous results. Using absorptivities obtained in this wavelength range, we calculated the first-order rate constant for the formation of OH radicals by the photolysis of aqueous nitrite in summer noon sunlight at 40 degrees N. The resulted rate constants, 5.2 x 10(-5) s(-1) for surface water and 1.04 x 10(-4) s(-1) for cloud and rain water droplets, are twice the previously reported values. The environmental significance of these results is discussed briefly. (C) 1997 Elsevier Science Ltd.

引用

页码：181 / 188

页数：8

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