Heavy metal diffusion through soft Bangkok clay | |
| Author | Kumar, Aneel |
| Call Number | AIT Thesis no.GE-04-15 |
| Subject(s) | Clay--Thailand--Bangkok Heavy metals Soils--Heavy metal content--Thailand--Bangkok |
| Note | A thesis submitted in pattial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-04-15 |
| Abstract | This study was aimed to determine contaminant transport parameters of heavy metals, such as Manganese and Ferrous diffusing in saturated soft Bangkok Clay. In total twenty-eight column tests were conducted and a theoretical model was utilized to identify the relevant coefficients. Two different influent concentrations of chlorides, 0.002 molar and 0.001 molar for MnCl2 and FeCl2 were used respectively. MnCl24H2O or FeCl24H2O was dissolved in de-ionized distilled water to produce the metal solution. Two different source concentration conditions, constant and decreasing, were utilized. Testing periods were ranged from 30 days to 60 days while hydraulic gradients were ranged from 0 to 200. The curves between relative concentration vs. time and pore volume were developed for the constant source condition and curves between source reservoirs concentrations vs. time were developed for decreasing source condition. At the end of each test, the soil columns were horizontally sectioned to extract the pore water and to determine the amount of absorbed metals with depth. For extraction of metals from soil DTPA-solution was used and the chemical analyses were performed with a spectrophotometer. The effective diffusion, De, and distribution, Kd, coefficients were determined by curve fitting using the computer code POLLUTE v 6. The distribution coefficients were crosschecked by developing adsorption isotherms. The tortuosity and retardation factor were calculated by using the net average values of diffusion and distribution coefficients. |
| Year | 2005 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-04-15 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical Engineering and Management (Master Engineering (Professional)) (PME - GEM) |
| Chairperson(s) | Glawe, Ulrich; |
| Examination Committee(s) | Park, Kyung-Ho; Pham Huy Giao; |
| Scholarship Donor(s) | Higher Education Commission Pakistan;AIT Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |