UPTAKE OF AMMONIA BY NYLON FILTERS IN FILTER PACK SYSTEMS

被引：12

作者：

MASIA, P

DIPALO, V

POSSANZINI, M

机构：

[1] Istituto sull' Inquinamento Atmosferico, Area della Ricerca di Roma, 00016 Monterotondo Stazione, Roma, Via Salaria Km 29

来源：

ATMOSPHERIC ENVIRONMENT | 1994年 / 28卷 / 02期

关键词：

NYLON FILTERS; AMMONIA RETENTION; DENUDER-FILTER PACK SYSTEM;

D O I：

10.1016/1352-2310(94)90112-0

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Retention of ammonia on nylon filters as a function of the loading with gaseous HNO3/HCl mixtures is shown. A strong correlation has been observed in field measurements by annular denuder-filter pack technique; 0.5-2 mumol of NH4+ have been found in nylon filter extracts in the presence of 2-4 mumol of total nitrate and chloride. This fact indicates that ambient levels of NH3 may be underestimated in filter packs if the acid-absorbing nylon filter (which precedes the acid-impregnated filter for NH3 collection) is not also analysed for ammonium ion.

引用

页码：365 / 366

页数：2

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