Adsorption of formaldehyde in wastewater by rice husk carbon, Typha angustifolia Linn. Carbon and Cuperus corybosus Rottb. carbon
2010
Watcharapong Wararam(Kasetsart University, Bangkok (Thailand). College of Environment) E-mail:Jack_007JK@hotmail.com | Penjun Comebang(Kasetsart University, Bangkok (Thailand). College of Environment) | Nipon Tungkananuruk(Kasetsart University, Bangkok (Thailand). College of Environment) | Kanita Tungkananuruk(Kasetsart University, Bangkok (Thailand). College of Environment)
Remained of formaldehyde after adsorptive extraction by carbonated carbon from rice husks, Typha angustifolia Linn. and Cuperus corybosus Rottb. can be determined by spectrophotometry at 575 nm as monocationic dibenzoxanthylium. The effects of adsorption conditions involving pH (3-9), shaking time, contact time (10-120 minute), concentration of formaldehyde (10-50 mg/L) and weight of adsorbent (20-100 g/L) were reported. Under the conditions, the adsorption process was conformed with Langmuir behaviour of carbonated carbon from rice husks and Typha angustifolia Linn. and conformed with Freundlich behaviour of carbonated carbon from Cuperus corybosus Rottb. under optimum conditions pH were 3,5 and 5, shaking time were 120, 120, and 30 minutes, contact time were 30, 120 and 30 minutes, of carbonated carbon from rice husks, Typha angustifolia Linn. and Cuperus corybosus Rottb. respectively. The result shown that can be adsorped formaldehyde 14.50, 22.24 and 32.71 respectively.
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