Inorganic mercury uptake by Chao Phya River bed sediments | |
| Author | Dimzon, Mario Singian |
| Call Number | AIT Thesis no.1090 |
| Subject(s) | Mercury Environmental engineering--Research--Chao Phya River |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand |
| Publisher | Asian Institute of Technology |
| Abstract | Inorganic mercury adsorption by river bed sediments is one of the factors which determines the amount of mercury available to the lowest species in the aquatic food chain. This in turn determines the amount of mercury available to man. The behaviour of inorganic mercury uptake by three types of sediments -- sand, organic and clay, was studied to determine the effects of pH, aqueous mercury concentration, chlorides and flow of water, typical of the naturally-occurring conditions in the Chao Phya River. The organic content of a sediment was found to greatly influence its uptake capacity. Inorganic mercury is tightly bounded by the organic fraction. Uptake capacity was found to increase with increase in aqueous mercury concentration. Chlorides were found to have a significant effect on the uptake capacity of mercury by sediments -- as high as 85% reduction in capacity was obtained with 5,000 mg/l c1-. They tend to reduce the uptake capacity because they are capable of forming inorganic mercury complexes which in turn increases the solubility of mercury. The nature of the sediment, especially its organic content likewise influenced the effect of flowing water on the uptake capacity of the sediments. For those with low organic content, the flow of water decreased their uptake capacity while the reverse was observed for those with high organic content. pH showed minimal effects under the conditions studied. |
| Year | 1977 |
| Type | Thesis |
| School | Student Research Before 1979 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Nguyen, Cong Thanh |
| Examination Committee(s) | Ouano, E.A.R. ; Edwards, Peter |
| Scholarship Donor(s) | Government of the United States of America |
| Degree | Thesis (M.Eng. ) - Asian Institute of Technology, 1977 |