The potential use of Vertiveria nemoralis and Nicotiana tabacum for phytoremediation of lead | |
| Author | Atitaya Panuvatvanich |
| Call Number | AIT Thesis no.EV-03-3 |
| Subject(s) | Phytoremediation Lead Hydroponics |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Masters of Engineering. Inter-University Program on Environmental Toxicology, Technology and Management. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-03-3 |
| Abstract | Metal contaminated land is becoming an important environmental, health, economic issue in many developed as well as developing countries. The toxic metals both organic and inorganic tractions are persistent in the soil environment and current remediation technologies are highly variable, complicated and costly. The use of certain plants, especially local ones which can accumulate or biodegrade contaminant is a relatively new approach to the problems of contamination of soil and water, i.e., phytoremediation. Phytoremediation, an emerging cleanup technology for contaminated soils, groundwater, and wastewater that is both low-tech and low-cost, is defined as the engineered use of green plants (including grasses, forbs, and woody species) to remove, contain, or render harmless such environmental contaminants as heavy metals as well as trace elements organic compounds, and radioactive compounds in soil or water. The purpose of this study was to investigate the efficiency of lead bioaccumulation and lead removal from water and soil by lead hyperaccumulating plants. Vetiveria nemoralis and Nicotiana tabacum were selected for phytoremediation experiment using Nutrient Film Technique (NFT) hydroponic system to grow and expose to Pb(N03) 2 concentration at 50 mglL with the addition of the chelating agent EDTA at the ratio of 1:1 (250 μM Pb-EDTA) was employed to facilitate Pb solubility including more translocation of Pb to the above ground biomass. The plants were harvested at 1, 2, 3, and 4 weeks and measures of biomass, height, Pb content in the different part of plants (roots, stem and leave) to study the structural change and distribution pattern of lead localization in lead hyperaccumulating plants. However, results of the study obtained for Pb contaminated water indicated that Pb accumulation by an average in Vetiveria nemoralis and Nicotiana tabacum on dry weight were 1368 μgig and 4640 μgig respectively. Moreover, the Pb accumulations in contaminated soil of two species were 825 μgig and 1840 μgig respectively. Note should be made here that Nicotiana tabacum has the higher capacity in Pb accumulation as compared among the two species. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-03-3 |
| 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) | Preeda Parkpian |
| Examination Committee(s) | Skom Mongkolsuk ;Sombun Techapinyawat |
| Scholarship Donor(s) | Royal Thai Govemmemt Fellowship |