Mobilization of arsenic from biotic disturbances in organoclay amended sediments.
Research Mentor(s)
Sofield, Ruth M.
Description
Organoclay (OC) amendments have been proposed as an effective remedial technology for in-situ sediment cleanup involving inorganic contaminants, such as arsenic. OC acts as a sorbent to sequester and immobilize the contaminants. It is speculated that synthetic worm gastric juice (SWGJ) may increase the mobility of contaminants in the sediment. This study will simulate natural biotic disturbance using SWGJ in batch partitioning experiments under laboratory conditions. The partitioning of arsenic (as arsenate) between two phases will be analyzed using an ICP-MS. A higher concentration of arsenic is expected to be measured in the water column and sediment treatments that include SWGJ, which will indicate that desorption has occurred. This novel study will provide us with partitioning coefficients for arsenic in treated sediments, which will provide us with insight towards the bioavailability of contaminants to fish and other organisms.
Document Type
Event
Start Date
18-5-2017 9:00 AM
End Date
18-5-2017 12:00 PM
Department
Environmental Sciences
Genre/Form
student projects; posters
Subjects – Topical (LCSH)
Water--Pollution--Environmental aspects; Arsenic--Environmental aspects
Type
Image
Rights
Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this documentation for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.
Language
English
Format
application/pdf
Mobilization of arsenic from biotic disturbances in organoclay amended sediments.
Organoclay (OC) amendments have been proposed as an effective remedial technology for in-situ sediment cleanup involving inorganic contaminants, such as arsenic. OC acts as a sorbent to sequester and immobilize the contaminants. It is speculated that synthetic worm gastric juice (SWGJ) may increase the mobility of contaminants in the sediment. This study will simulate natural biotic disturbance using SWGJ in batch partitioning experiments under laboratory conditions. The partitioning of arsenic (as arsenate) between two phases will be analyzed using an ICP-MS. A higher concentration of arsenic is expected to be measured in the water column and sediment treatments that include SWGJ, which will indicate that desorption has occurred. This novel study will provide us with partitioning coefficients for arsenic in treated sediments, which will provide us with insight towards the bioavailability of contaminants to fish and other organisms.