FORMATION AND DECOMPOSITION OF TRIALKYLLEAD COMPOUNDS IN THE ATMOSPHERE

被引：17

作者：

HEWITT, CN ^{[1
]}

HARRISON, RM ^{[1
]}

机构：

[1] UNIV ESSEX,DEPT CHEM,COLCHESTER CO4 3SQ,ESSEX,ENGLAND

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1986年 / 20卷 / 08期

关键词：

AIR POLLUTION - Analysis - ATMOSPHERIC COMPOSITION - CHEMICAL REACTIONS;

D O I：

10.1021/es00150a006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The kinetics and mechanisms of the homogeneous reactions of tetramethyllead (TML) and tetraethyllead (TEL) with hydroxyl (HO) have been studied. A suite of lead products were found, including ionic trialkyllead (TriAL) and dialkyllead (DiAL) compounds and inorganic Pb. The ionic alkyllead products were found both in the gas phase and in the aerosol, as well as on the reaction chamber walls. The decomposition reactions of TML, TEL, and the ionic trimethyllead and triethyllead salts were found to proceed with psuedo-first-order kinetics, with the ionic TriAL compounds being about 3 times less reactive with HO than the corresponding tetraalkyllead (TAL) compounds. The ionic TriAL compounds are therefore quite persistent in the atmosphere, ionic TriML having a global mean half-life of about 5 days.

引用

页码：797 / 802

页数：6

共 20 条

[1] APPLICATION OF DIFFUSION CELLS TO THE PRODUCTION OF KNOWN CONCENTRATIONS OF GASEOUS HYDROCARBONS [J].