Loading...
| Friend's email | |
| Your name | |
| Your email | |
| enter code | |
This page was sent successfuly
- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 41126 (06)
- University: Sharif University of Technology
- Department: Chemical and Petroleum Engineering
- Advisor(s): Roosta Azad, Reza; Moosavi, Abbas; Hesampour, Mehrdad
- Abstract:
- When oil spill take place, it should be removed rapidly. For control of oil pollution, polymeric foams that absorb oil highly, can be used. These foams are polyurethane and polypropylene that float on water and absorb several times their own weight of crude oil. When a thin layer of crude oil remained on water, it couldn’t be separated by chemical and physical methods. In this cases biological methods will be best and suitable. Therefore absorption and biodegradation of oil spill are executed by immobilization of suitable microorganism on polyurethane foam. But current polyurethane foams aren’t biodegradable so this incompetence should be solved. Polyurethane foams compose of two basic composite: isocyanate and polyol. The kind of polyol has high influence on biodegradability. With producing polyol from liquefaction of wheat straw in a simple method, polyurethane foam will be biodegradable as well as reduce cost of production. After foam production, several incompetence have been observed in immobilization stage. First of all produced polyol has high acidity (PH about 3.5- 4) that affects on microorganism activity. Second after first impact with water, produced foam loses about 39% of own weight therefore a brittle structure remains. These problems cause to produced polyurethane foam be unsuitable in the remediation of oil spill from sea water
- Keywords:
- Oil Pollution ; Biodegradability ; Bioremediation ; Polyurethane ; Biodegradation ; Foam ; Micro Organism Immobilization ; Liquefied Wheat Straw
Digital Object List
-
محتواي پايان نامه
- view
Bookmark