| Author | Naing Naing Win |
| Call Number | AIT Thesis no.EV-96-21 |
| Subject(s) | Sewage--Purification--Heavy metals removal
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | Copper and chromium removal capacities of chitosan were studied using batch and
continuous column experiments. Kinetics and isotherm studies indicated that heavy metals such
as chromium and copper can be effectively removed by chitosan. The rates of sorption were
very rapid initially. At low equilibrium concentration, maximum adsorption were obtained
within 4 and I hour for copper and chromium respectively. 13 mg copper and 16.5 mg
chromium could be adsorbed per gram of chitosan at an equilibrium heavy metal concentration
of 1mg/L.
Effect of operating parameters such as pH, chloride ion, complexing agents such as
ethylenediamine tetraacetate (EDT A), particle size and coions on chitosan heavy metal removal
capacity were investigated. Copper and chromium adsorption were maximum at pH value of
6.0 and 3.0 respectively. Presence of chloride ion did not improve adsorption of copper but
chromium uptake was significantly reduced. Soluble complexing agents such as
ethylenediamine tetraacetate (EDT A) decreased the sorption of copper and chromium. Smaller
chitosan particles have higher metal adsorption capacity. Presence of coions also increased
metal adsorption capacity of chitosan.
Used chitosan was regenerated with acid and base for copper and chromium
respectively and reused. Results from this study indicated that chitosan adsorption for copper
and chromium removal can have practical applications in water and wastewater treatment
processes. |
| Year | 1996 |
| 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 (EV) |
| Chairperson(s) | Annachhatre, Ajit P.; |
| Examination Committee(s) | Stevens, Willem Frans;Suwalee Chandrkrachang;Kamei, Tasuku; |
| Scholarship Donor(s) | Asian Institute of Technology; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1996 |