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008			120399s1989 th r 0000|00eng d
035			_a.b10617905
099		9	_aAIT Thesis no. EV-89-15
100	1		_aChang, Ching-lung
245	1	0	_aSolidification of heavy metals using cement and rice husk ash
260			_aBangkok : _bAsian Institute of Technology, _c1989
300			_a46 p.
490	1		_aThesis ; _vno. EV-89-15
500			_aA thesis submitted in partial fulfillment of the requirements of the degree of master of engineering, School of Environment, Resources and Development
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1989
520			_aA ceme n t-silica based technique wa s us ed for waste stabilization. Ordinary Portland Cement < OPC), Portland Rice Husk As h Cement CPRHAC) are used as ce mentitious binders in this experi me nt. Synthetic wastes containing Cr, Cu and Hg are prepared in laboratory. Heavy Metal Bonding Mechanisms are points to explain the leaching behavior. types between metal and binders result trends: Cr leachability wa s higher in PRHAC and Hg leachability were higher in OPC experi ment. found to be the key The diff ere nt bonding in diff ere nt leaching than in OPC, while Cu than in PRHAC in this Cu and Hg bonding with binders is a kind of pore trapping or pores s urfaces adsorption, so their leachability we r e affected b y alkalinity, the h igh er alkalinity, the mor e leachability. Comparing OPC - based method and PRHAC - bas e d method in this study, it was found out that OPC was better immobilizer for Cr, while PRHAC was better immobilizer for Cu a nd Hg .
650		0	_aHazardous wastes
700	1		_aAhn, Kyu-Hong, _eChairperson
700	0		_aKrienqsak Udomsinrotm _eExamination
700	1		_aVerink, Johan, _eExamination Committee
710	2		_aROC Government, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-89-15
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B18014
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