Accession Number : ADA298043

Title :   Effects of Colloids, Flocculation, Particle Size, and Organic Matter on the Adsorption of Hexachlorobenzene to Sediments.

Descriptive Note : Master's thesis,

Corporate Author : CALIFORNIA UNIV SANTA BARBARA DEPT OF MECHANICAL AND ENVIRONMENTAL ENGINEERIN G

Personal Author(s) : Tye, Robert

PDF Url : ADA298043

Report Date : JUN 1995

Pagination or Media Count : 57

Abstract : Understanding and quantifying the dynamics of the sorption and partitioning of contaminants to sediments is essential in understanding and predicting the transport and fate of hydrophobic contaminants. In the present study, the effects of colloids from the sediments and from the water, floc density and size, particle size, and organic matter on hexachlorobenzene (HCB) adsorption and partitioning have been quantified, which is achieved by the partition coefficient, Kp, defined as the ratio of contaminant associated with the sediment to the contaminant associated with the filtrate. It is shown that the measured steady-state partition coefficient increases due to the colloids initially present in the water that aggregate to the sediment compartment. Also, colloids initially associated with the sediment decrease the measured steady-state partition coefficient by dissociating from the sediment and dissolving in the water where they are measured in the dissolved compartment. Experiments also conclude the majority of adsorption is due to the organic matter present in the sediment. jg p.4

Descriptors :   *PARTICLE SIZE, *ADSORPTION, *ORGANIC MATERIALS, *COLLOIDS, *SEDIMENTS, *FLOCCULATION, *CHLOROBENZENE, STEADY STATE, DYNAMICS, WATER, THESES, COMPARTMENTS, COEFFICIENTS, CONTAMINANTS, SORPTION, DISSOLVING, HYDROPHOBIC PROPERTIES.

Subject Categories : Organic Chemistry
      Inorganic Chemistry
      Physical Chemistry
      Physical and Dynamic Oceanography
      Pesticides Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE