The Effect of Changes in Acidity and Salinity on the Octanol Water Partition Coefficient of Monomethylmercuric Species Present in Aquatic Environments at High pE

The octanol/water partition coefficient (Kow) of methylmercury was determined at pH 7 in water and in aqueous solutions ranging from 0.0003 M to 0. 6000 M in sodium chloride. It was also determined over a pH range of 2 to 10 with a fixed sodium chloride concentration of 0.0045 M. In these experiment...

Full description

Saved in:
Bibliographic Details
Main Author: Major, Michael A
Format: Report
Language:English
Subjects:
ACIDS
ANIONS
AQUATIC BIOLOGY
AS835
CHLORIDES
CONCENTRATION(CHEMISTRY)
ENVIRONMENTS
EXCHANGE
Fluid Mechanics
HYDROXIDES
IONIZATION
LOW LEVEL
METHYLMERCURIC CHLORIDE
METHYLMERCURIC HYDROXIDE
METHYLMERCURY
PARTITION COEFFICIENT
PE62720A
PH FACTOR
SALINITY
SODIUM CHLORIDE
SURFACE PROPERTIES
WATER
WU132
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The octanol/water partition coefficient (Kow) of methylmercury was determined at pH 7 in water and in aqueous solutions ranging from 0.0003 M to 0. 6000 M in sodium chloride. It was also determined over a pH range of 2 to 10 with a fixed sodium chloride concentration of 0.0045 M. In these experiments, Kow was seen to increase with increasing chloride concentrations in the range 0. 0 to 0.075 M, with the sharpest increases in the range 0.00 to 0.01 M. Kow was seen to decrease as the pH increased from 5 to 8. Results were similar whether low levels of methylmercuric chloride or methylmercuric hydroxide were used as the starting materials. Partitioning was not affected by changes in ionic strength in the range 0.01 to 0.6 M. Changes in partitioning behavior are attributed to an exchange of chloride and hydroxide anions on the methylmercuric cation.