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008			011098s1979 th r 0000|0 eng d
035			_a.b10054649
099		9	_aAIT Thesis No. EV-79-09
100	1		_aKhan, Ghauri Badar Munir
245	1	0	_aAdsorption of chromium from water by activated carbon
260			_aBangkok : _bAsian Institute of Technology, _c1979
300			_a98 p.
490	1		_aThesis ; _vno. EV-79-09
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1979
520			_aThis report describes the work conducted on the removal. of chromium hexavalent from water employing activated carbon adsorption. The study consists of an initial batch phase and· then follows a continuous column operation. Two types of activated carbon (Actibon and Hydrodarco) were employed in batch adsorption study whereas only granular 1-C.l hydrodarco activated carbon was used for batch regeneration and continuous columns adsorption-desorption. Some of the major factors affecting removal of Cr(VI) by activated carbon were studied in batch process, i.e., pH, initial Cr(VI) concentration, carbon dose, and contact time. It was found that maximum adsorption was at pH value of 2.0 or less and at low Cr(VI) concentration (i.e. 10 mg/l) maximum adsorption is obtained within 10 minutes. It was also observed that the particle size of carbon does not change the magnitude of Cr(VI) removal. The free energy of specific chemical interaction, AG chem was computed by Gouy-Chapman-Stern-Grahame model giving average value of -3.04 Kcal/mole which is enough to influence the overall magnitude of Cr(VI) adsorption. Regeneration with one percent NaOH solution proved almost as efficient as with five percent or 10 percent NaOH and maximum desorption efficiency was 63 percent with 10 percent NaOH solution. Results of various phases of study indicated that activated carbon adsorption for Cr(VI) removal may have practical application in small water treatment plants.
650		0	_aSewage _xPurification _xActivated sludge process
700	1		_aLohani, Bindu N., _eChairperson
700	1		_aNguyen, Cong Thanh, _eCo-Chairperson
700	0		_aSamorn Muttamara, _eExamination Committee
710	2		_aThe Royal Government of the Netherlands, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. EV-79-9
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B22228
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