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005			20260817163236.0
008			040430s2003 th u m rtt 00| a1eng d
035			_a.b11924093
099		9	_aAIT Thesis no.EV-03-23
100	1		_aKato, Tomohiro
245	1	0	_aArsenic remobilization from secondary deposit
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2003
300			_a81 leaves : _bill.
490	1		_aThesis ; _vno. EV-03-23
502			_aThesis (M.Sc.) - Asian Institute of Technology, 2003
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science.
520			_aIn Thailand Ron Phibun, Ron Phibun sub strict, Nakhon Si Thammat province is the place where arsenic contamination has occurred and been reported. Arsenic was generated from the process of refinery and dumped into dredging site and river. It is estimated that arsenic contamination in Ron Phibun has become wide-spread throughout these dumping sites. Besides highly contaminated groundwater was detected from the tube well near by the first patient home. According to the research result the average arsenic content in soil and surface water of dumping sites was about 500 mg/kg(ppm), with maximum value at 5309mg/kg(ppm), and 1.85 mg/l(ppm) respectively. The chemical species of arsenic are particularly important in the sediment-water phases. Change in sediment environment, i.e., a transition from anaerobic to aerobic conditions, which refers to oxidation and reduction potential (ORP), or vice versa, and pH, may involve a change in chemical species, and thereby alter the environmental arsenic behavior such as speciation and solubility (Masscheleyn, et al., 1991). Grafe, et al., (2001) concluded that the presence of dissolved organic carbon(DOC) may compete with arsenic for adsorption on mineral surface, hence increasing its potential bioavailability. This study defines the comprehensive interrelation between arsenic remobilization and corresponding environmental factors and provides the scientific information to the decision makers.
650		0	_aArsenic wastes
700	0		_aPreeda Pakpian, _eChairperson
700	1		_aAnnachhatre, Ajit P., _eExamination Committee
700	1		_aSatoh, Hiroyasu, _eExamination Committee
700	1		_aMonthip Sriratana Tabucanon, _eExamination committee
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-03-23
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B08327
907			_a.b11924093 _bmnait _cu
902			_a240417
998			_b0 _c040430 _dm _ea _fu _g0
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