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008 271098s1980 th r 0000|0 eng d
035 _a.b1038926x
099 9 _aAIT Thesis no.EV-80-16
100 1 _aVego, Imelda S.
245 1 0 _aKinetics of silica removal from industrial water
260 _aBangkok :
_bAsian Institute of Technology,
_c1980
300 _av, 68 p.
490 1 _aThesis ;
_vno. EV-80-16
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, 1980
520 _aThe presence of silica in industrial water poses a serious problem to the water engineers. This study was conducted primarily to investigate the potential of calcium and magnesium for removing silica from waters intended for industrial use, at silica concentrations approaching amorphous silica solubility of 120 mg/t Si02{u2022} Both the laboratory scale batch and continuous flow studies were conducted. The reaction of both calcium and magnesium with silica was found to be of the first-order. For magnesium, the rate constant k, was found to be +0.0655 min and optimum pH of 10 and an alkalinity of 125 mg/t CaC03. Thus the rate equation can be expressed as ln C/Co-1 = -0.0655 t. For calcium, the rate constant k, was found to +0.0277 min an optimum pH of 11. The rate equation can be written as ln C/C0 = -0.0277 t. For the continuous flow studies, the removal of silica by magnesium and calcium was found to be affected by the detention time and the re cycle rate, nevertheless, the mixing intensity has no significant effect on the removal of silica by magnesium and calcium. Since the kinetics of the reaction was known, the equation -t 1 Cio CMF = k (Co - 1) can be used to predict the effects of these process parameters.
650 0 _aSilica
650 0 _aSewage
_xPurification
700 1 _aLohani, Bindu N.,
_eChairperson
700 1 _aWatanabe, Yoshimasa,
_eExamination Committee
700 0 _aChongrak Polprasert,
_eExamination Committee
710 2 _aThe Government of the United States of America,
_eScholarhsip Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-80-16
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B21981
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