On the occurrence of nitrite in urban fogwater
On the occurrence of nitrite in urban fogwater
复制标题
DOI：
10.1016/s0045-6535(98)00151-9
复制
发表时间：
1998-10
期刊：
影响因子：
8.8
通讯作者：
G. Lammel;G. Metzig
中科院分区：
文献类型：
--
作者：
G. Lammel;G. Metzig
在德国的一个污染源地区，在3 - 52 μmol L−1的雾水样品中观察到亚硝酸盐。雾水含有高浓度的各种污染物，但只有很少或没有酸性。可氧化S（IV）的浓度范围为6 - 290 μmol L−1。一个两相化学盒模型被用来描述化学。发现雾水N（III）对气相HNO 2和HCHO（均未测量）敏感。从S（IV）在可氧化和不可氧化物质之间的分布（后者被怀疑由S（IV）和溶解的HCHO形成的复合物占主导地位），推断HCHO很可能是低的。溶解的NO2和S（IV）之间的反应是一个重要的N（III）来源，如果没有向雾中加入气相HNO 2，甚至可以解释观察到的雾水亚硝酸盐浓度。实验结果与模型预测值的比较表明，NO2的相间传质具有较低的质量调节系数。
Nitrite was observed in fogwater samples 3 – 52 μmol L−1, in a polluted source region in Germany. The fogwater contained high concentrations of various pollutants but only little or no acidity. The concentrations of oxidizable S(IV) were in the range 6 – 290 μmol L−1. A two-phase chemical box model is used to interprete the chemistry. Fogwater N(III) is found to be sensitive to gas-phase HNO2and also to HCHO (which were both not measured). From the distribution of S(IV) between oxidizable and non-oxidizable species (the latter is suspected to be dominated by the complex formed from S(IV) and dissolved HCHO), it is infered that HCHO most likely was low. The reaction between dissolved NO2and S(IV) was an important N(III) source and could even explain the observed fogwater nitrite concentrations, if no gas-phase HNO2was fed into the fog. The comparison between observed and model predicted suggests that interphase mass transfer of NO2is characterized by a low mass accommodation coefficient.