SORPTION OF PENTACHLORPHENOL TO HDTMA-CLAY AS A FUNCTION OF IONIC-STRENGTH AND PH

被引：93

作者：

STAPLETON, MG ^{[1
]}

SPARKS, DL ^{[1
]}

DENTEL, SK ^{[1
]}

机构：

[1] UNIV DELAWARE,DEPT CIVIL ENGN,NEWARK,DE 19717

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1994年 / 28卷 / 13期

关键词：

D O I：

10.1021/es00062a017

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We investigated the sorption of pentachlorophenol (PCP) to a surfactant-modified clay and the solubility of PCP as a function of pH and ionic strength. Pentachlorophenol is a hydrophobic ionizable organic compound; therefore, it can exist as either a protonated or a deprotonated species. The objectives of this study were to determine differences in the sorption and solubility of the two species and to model the sorption as a function of pH. We developed a model that described the sorption across the experimental pH range (4-8.5). The model represented the sorption of the deprotonated species by a Langmuir-type isotherm and the sorption of the protonated species by a linear isotherm. Between pH 4 and pH 8.5, the sorption decreases by three times and the solubility increases by 3 orders of magnitude as the dominant aqueous species changes from the protonated to the deprotonated form.

引用

页码：2330 / 2335

页数：6

共 33 条

[1] SORPTION CHARACTERISTICS OF ORGANIC-COMPOUNDS ON HEXADECYLTRIMETHYLAMMONIUM-SMECTITE [J].