| Author | Phontong Sujiwatthana |
| Call Number | AIT Thesis no. EV-87-5 |
| Subject(s) | Salvage (Waste, etc.)
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | A cement-silica based technique, one of the solidification
processes was studied for waste stabilization. Experiments were
conducted in laboratory with four types of hazardous wastes
including cadmium (Cd), lead (Pb), aldrin (AD) and chlordane
(OHM).
Effects of several factors on leachability and compressive
strength of solidified mixture were investigated. Portland cement
was used to mix with the waste for solidification. The factors
studied were the amount of hazardous waste added, water/cement
ratio, surface area/volume ratio, pH of extract solution and
curing time of solidified samples . Samples were extracted with
acidified solution following the extraction procedure.
The amount of hazardous waste in leachate was found
proportional to the initial amount of waste in a solidified
sample. Increase of surface area/volume ratio of solidified
sample or decrease in pH of extract solution increased the
amount of leached waste. Increase of curing time did not much
affect the amount of leached waste but increased the compressive
strength mostly until 28 days. When the water/cement ratio was
0.5, amount of leached waste was the least but the sample had
the most compressive strength. Also the greatest compressive
strength was obtained when the l east amount of hazardous waste
was added. Maximum allowable amount of waste to be added in
solidification was estimated by modelling techniques . Also the
treatment cost per unit we ight of waste was calculated for
practical application. |
| Year | 1987 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Shin, H. S. |
| Examination Committee(s) | Chongrak Polprasert ;Samorn Muttamara |
| Scholarship Donor(s) | French Government |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1987 |