NDLI: Ammoniacal nitrogen and COD removal from semi-aerobic landfill leachate using carbon-mineral composite adsorbent

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Ammoniacal nitrogen and COD removal from semi-aerobic landfill leachate using carbon-mineral composite adsorbent

Content Provider	Semantic Scholar
Author	Halim, Azhar Abdul Aziz, Hamidi Bin Abdul Azmi Johari, Megat Azmi Megat Ariffin, Kamar Shah
Copyright Year	2008
Abstract	Chemical oxygen demand (COD) and ammoniacal nitrogen were the problematic parameters in landfill leachate treatment. Combination of activated carbon and zeolite as filter medium may reduce this problem. This study was conducted to find treatment alternative by combining the low cost adsorbent such as limestone and rice husk carbon waste and ordinary adsorbent media, activated carbon and zeolite as a single media. All the adsorption media was crushed and sieved to a particle size of 150 μm. The optimum ratio was predicted by mean of a batch equilibrium experiments. Ordinary Portland Cement (OPC) was used as a binder at 30 percent by weight. Activated carbon and rice husk carbon was grouped as a hydrophobic media where the optimum ratio was 1:1. Zeolite and limestone was in hydrophilic media group which the best ratio was 3:1. The ratio for hydrophilic and hydrophobic media had been chosen as 7:1 accordingly to adsorption behavior of ammoniacal nitrogen and organic constituents (COD) to the media. The optimum conditions for adsorption batch study were found at pH 7, 200rpm in shaking speed and 90 minutes of contact time. The results showed that the equilibrium data were fitted and favorable adsorption by both of the Langmuir and Freundlich isotherms while Langmuir isotherms was slightly better fitted for ammoniacal nitrogen and Freundlich was good for COD removal in term of regression coefficients (R 2 ). Langmuir adsorption capacities (Q) for ammonia and COD were 43.47mg/g and 256.41mg/g respectively while Freundlich (K F) were 0.00135mg/g and 0.03891mg/g respectively.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.chemistry.unpad.ac.id/isc-proceeding/2008/Pdf/PP/0722-0728%20PP110%20Azhar%20Abdul%20Halim.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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