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005			20260818133432.0
008			020201s2001 th uu|m rtt 0| a1eng d
035			_a.b11843639
099		9	_aAIT Thesis no.EV-01-22
100	0		_aTran Hong Giang
245	1	0	_aHeavy metal leaching from contaminated soil by acetic acid
260			_aBangkok : _bAsian Institute of Technology, _c2001
300			_a51 leaves
490	1		_aThesis ; _vno. EV-01-22
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
502			_aThesis (M. Sc.) - Asian Institute of Technology, 2001
520			_aThis study was carried out to evaluate and determine the applicability of using acetic acid in removal of heavy metals from contaminated soils. With acetic acid at pH 2.8, produced easily from organic wastes, soil was treated with the highest efficiency. The acid solution was applied in column experiment by surface flooding to increase to the solubility and mobility of metals in the soil, that is Cd and Ni were removed from soil after estimated about 120 clays of treatment. When acetic acid solution at pH 2.8 was applied to treat the soil, soil pH was reduced from initial value of 5.2 to 3.9. However, acetic acid can be a food source for microorganism in soil, when organic acid reduced, soil pH was increased to initial values after 80 day, that may not cause negative effect to plant growth. Because the treatment of the soil removes the large part of available metals, so after a certain time, the population of microorganisms significantly increased. Bacteria were limited in acid habitats; the fungi dominated the microbial community in areas of low pH, the number of fungi could increased 4 times with control when com . Some bacteria were persisting for long periods in such unfavorable circumstance. Once the organic acids in soil reduce fungi activities reduce, the bacteria will return rapidly to a position of importance.
650		0	_aSoil remediation
650		0	_aSoils _xHeavy metal content
650		0	_aAcetic acid
700	1		_aNguyen, Cong Thanh, _eChairperson
700	1		_aFukushi, Kensuke, _eExamination Committee
700	0		_aPreeda Pakpian, _eExamination Committee
710	2		_aCEC-DAAD, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis; _vno. EV-01-22
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B08378
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