Remediation technology of boron and fluoride using green plants | |
| Author | Areerat Jaksakul |
| Call Number | AIT Thesis no.EV-06-2 |
| Subject(s) | Boron Fluorides--Physiological effect Plants, Effect of fluoride on Plants, Effect of boron on |
| Note | A thesis submitted in pattial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Fluoride and boron contaminated in groundwater has been the problem of the north part of Thailand. The level of fluoride in this part is in the range of 1.7-14 mg/I in groundwater. The research was undertaken to investigate hyperaccumulating plants for removing boron and fluoride from the water. Selected plants were analyzed for boron and fluoride accumulation and distribution in their parts such as roots, stems and leaves or fronds. Screening of hyperaccumulating plants was conducted by using silverback fern and Boston fern as selected plants. Both silverback fern and Boston fern were cultured under hydroponic system (Nutrient Film Technique) with half strength of Hoagland nutrient solution and exposed to boron and fluoride concentration at 3 mg/I. In the study I. focusing on boron. silverback fern plants showed the highest boron accumulation in their leaves. The concentration of boron in their leaves was 263.02 mg/kg of plant dry weight and it was higher than stem's part and root's part 1.7 times. The result indicated that boron can be accumulated and distributed into silverback fern's parts. Boston fern also has capacity to accumulate and distribute boron into their parts. The highest boron concentration was found in the leave's part about 176.73 mg/kg and it was higher than the root's part 1.4 times and higher than stem's part 5.5 times. In the study II, focusing on fluoride, silverback fern had capacity to accumulate and distribute fluoride into their parts. and the majority of fluoride was accumulated in the root part (322.12 mg/kg). It was higher than leaves and stem's parts 1.6 and 2.4 times, respectively. Boston fern could accumulate fluoride in their root's part, but could not well transport to the stem. As a result fluoride could not be detected in leaf part and stem part, respectively. Silverback fern is the hyperaccumulating plant for boron and fluoride because it has a bioconcentration factor (BCF) higher than 100. Boston fern is also the hyperaccumulating plant for boron. but it is less efficiency than silverback fern because BCF value is lower than silverback fern (silverback fern's BCF=155. Boston fern's BCF=112) |
| Year | 2006 |
| 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) | Preeda Parkpian; |
| Examination Committee(s) | Annachhatre, Ajit P. ;Aramaki, Toshiya; |
| Scholarship Donor(s) | National Science and Technology Department Agency (NSTDA), Thailand ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2006 |