| Author | Saha, Uttam Kumar |
| Call Number | AIT Thesis no.EV-93-25 |
| Subject(s) | Sewage--Purification--Phenol removal
|
| Note | A thesis submitted in partial fulfillment of the requirement for
the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | The effects of pH on the photocatalytic decomposition of
2,4,6-trichlorophenol (TCP) with UV illuminated titanium dioxide
powder in aqueous suspension were investigated. A first order
reaction with respect to 2, 4, 6-TCP concentration was obtained.
Higher degradation rate was observed under alkaline condition than
acidic condition. The role of adsorption of 2,4,6-TCP onto the TiO2
surface was found insignificant in photocatalysis. The reaction
rate was enhanced by the addition of sodium chloride at pH 10. But
at pH 5 a decrease in reaction rate was observed. The photocatalytic
decomposition of deaerated TCP solution with or without
sodium chloride addition gives lower degradation rate than with
dissolved oxygen at different pH. A mechanism for the reaction
based on photogeneration of hydroxyl radical was proposed. For a 20
mg/L of 2,4,6-TCP the average rate of solar degradation resulted in
a decrease in concentration to 2 mg/L within 160 min. Higher
potentiality of solar energy for the purification of water
containing 2, 4,6-TCP was found. |
| Year | 1993 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Tanaka, Shuzo; |
| Examination Committee(s) | Reutergardh, Lars Baetz;Visvanathan, C.; |
| Scholarship Donor(s) | Swedish International Development Authority; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |