| Author | Nyein Nyein Aung |
| Call Number | AIT Thesis no. EV-97-05 |
| Subject(s) | Sewage--Purification--Heavy metals removal
|
| 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 |
| Series Statement | Thesis ; no. EV-97-05 |
| Abstract | Batch experiments for heavy metal removal by adsorption using chitosan and
desorption of adsorbed metal from chitosan were conducted. Adsorption and desorption
isothermal results indicated that multilayer adsorption of heavy metal on chitosan took place.
Both adsorption and desorption for copper and chromium are favorable whereas those of lead
are also acceptable. 66%,45%and 47% desorption was observed for copper, chromium and
lead. Kinetic studies verified that desorption occured within 24 hour.
Effects of influencing parameters such as pH, particle size, temperature, agitation speed
were investigated. The optimum pH values for adsorption on chitosan were 5.5,6 and 4,
likewise, the optimum pH values for desorption were 2.41, 2.5 and 2.5 for Cu Cr and Pb
respectively. The amount of Cu sorbed on 710 µm chitosan particles and 425 µm chitosan
particles were 2 mg/g and 7 mW/g for the equilibrium concentration of 1 mg/L. The amount of
Cu sorbed at 37.5 ° C and 50 C were 6.5 mg/g and 11 mg/g respectively for the equilibrium
concentration of 0.5 mg/L. The amount of Cu sorbed at the agitation speed of 50 rpm and 250
rpm were 16 mg/g and 17 mg/g for the equilibrium concentration of 5 mg/L. In the case of
desorption, when the initial Cu sorbed was 2.5 mg/g, Cu desorbed from 710 µm chitosan
particles and 425 µm chitosan particles were 1.05 mg/g and 1.19 mg/g respectively. When the
initial amount sorbed was 5 mg/g, Cu desorbed at 37.5 ° C and 50
°c were 3.5 mg/g and 4.5
mg/g. When the initial Cu sorbed was 17 mg/g, the amount of Cu desorbed at the agitation
speed of 50 rpm and 250 rpm were 1.9 mg/g and 10 mg/g respectively. Similar trend was
observed for Cr and Pb. Lower particle size, higher temperature and higher agitation speed
enhanced both adsorption and desorption. |
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-97-05 |
| 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) | Suwalee Chandrkrachang ;Ishibashi, Y. ; |
| Scholarship Donor(s) | Asian Institute of Technology Partial ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1997 |