IONIC-STRENGTH AND BUFFER EFFECTS IN THE ELIMINATION-REACTION OF 1,1,2,2-TETRACHLOROETHANE

被引：10

作者：

JOENS, JA ^{[1
]}

SLIFKER, RA ^{[1
]}

CADAVID, EM ^{[1
]}

MARTINEZ, RD ^{[1
]}

NICKELSEN, MG ^{[1
]}

COOPER, WJ ^{[1
]}

机构：

[1] FLORIDA INT UNIV,DEPT CHEM,MIAMI,FL 33199

来源：

WATER RESEARCH | 1995年 / 29卷 / 08期

关键词：

1,1,2,2 TETRACHLOROETHANE; CHLOROALKANES; ABIOTIC REACTION; ELIMINATION REACTION; DEHYDROHALOGENATION REACTION;

D O I：

10.1016/0043-1354(95)00012-A

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The rate constant for the abiotic reaction of 1,1,2,2-tetrachloroethane in aqueous solution has been studied as a function of ionic strength, buffer composition, temperature, and pH. The rate of reaction is found to be independent of ionic strength and buffer composition, with the parent compound quantitatively converted into trichloroethene by a base mediated elimination reaction for values of pH > 3.5. The Arrhenius parameters for the elimination reaction are log(10) A = 16.32 +/- 0.40; E(a) = 95.0 +/- 2.5 kJ/mol. No evidence for a neutral hydrolysis reaction was found, indicating that the rate constant for such a reaction is < 2 x 10(-7)s(-1) at 90 degrees C.

引用

页码：1924 / 1928

页数：5

共 13 条

[1]

BATES RG, 1964, DETERMINATION PH, P6

[2]

Bevington PR, 1969, DATA REDUCTION ERROR, P92

[3] ABIOTIC TRANSFORMATIONS OF HALOGENATED ORGANICS .1. ELIMINATION-REACTION OF 1,1,2,2-TETRACHLOROETHANE AND FORMATION OF 1,1,2-TRICHLOROETHENE [J].