Laboratory optimization and field demonstration of diffusive gradients in thin films for in-situ mercury measurements of river sediments

Show simple item record


dc.contributor.advisor Reible , Danny D .
dc.contributor.committeeMember Katz , Lynn E .
dc.creator Chess , Timothy William
dc.date.accessioned 2010 -12 -21T16 :26 :16Z
dc.date.accessioned 2010 -12 -21T16 :26 :22Z
dc.date.accessioned 2014 -02 -19T22 :47 :52Z
dc.date.available 2010 -12 -21T16 :26 :16Z
dc.date.available 2010 -12 -21T16 :26 :22Z
dc.date.available 2014 -02 -19T22 :47 :52Z
dc.date.created 2010 -08
dc.date.issued 2010 -12 -21
dc.date.submitted August 2010
dc.identifier.uri http : / /hdl .handle .net /2152 /ETD -UT -2010 -08 -1942
dc.description.abstract Diffusive gradients in thin film (DGT ) technique is applied to determine pore water mercury concentrations in river sediments . DGT devices have been a useful indicator of dissolved metals in aqueous systems , although it is not as well developed for measuring mercury . DGT devices were evaluated for three different ion exchange resins for adsorption of mercury . After a series of laboratory experiments , 3 -Mercaptopropyl Functionalized Silica Gel (3M ) was chosen as an effective resin layer . Laboratory experiments showed that the resin strongly associated with dissolved Hg²⁺ . DGT probes were tested with sediments from the South River (Virginia , USA ) in the laboratory and the time dependent deployment verified an uptake of mercury to the probes and established an effective diffusion coefficient for site specific utilization . Multiple piston and sediment probes were deployed in the South River in -situ to determine overlying water Hg concentrations and sediment pore water Hg concentration profiles . The DGT devices were successful in measuring Hg concentrations in -situ .
dc.format.mimetype application /pdf
dc.language.iso eng
dc.subject DGT
dc.subject Mercury
dc.subject Sediment pore water
dc.title Laboratory optimization and field demonstration of diffusive gradients in thin films for in -situ mercury measurements of river sediments
dc.description.department Civil , Architectural , and Environmental Engineering
dc.type.genre thesis *
dc.type.material text *
thesis.degree.name Master of Science in Engineering
thesis.degree.level Masters
thesis.degree.discipline Environmental and Water Resources Engineering
thesis.degree.grantor University of Texas at Austin
thesis.degree.department Civil , Architectural , and Environmental Engineering
dc.date.updated 2010 -12 -21T16 :26 :22Z

Citation

Laboratory optimization and field demonstration of diffusive gradients in thin films for in-situ mercury measurements of river sediments. Master's thesis, University of Texas at Austin. Available electronically from http : / /hdl .handle .net /2152 /ETD -UT -2010 -08 -1942 .

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search DSpace

Advanced Search

Browse