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The use of powdered kaong for sorption of heavy metals (Pb2+ and Zn2+) from aqueous solution / Rhona K. Katigbak. 6

By: Rhona F. Katigbak. 4 0 16, [, ] | [, ] |

Contributor(s): 5 6 [] |

Language: Unknown language code Summary language: Unknown language code Original language: Unknown language code Series: ; April 2005.46Edition: Description: 28 cm. 40 ppContent type: text Media type: unmediated Carrier type: volumeISBN: ISSN: 2Other title: 6 []Uniform titles: | | Related works: 1 40 6 []Subject(s): -- 2 -- 0 -- -- | -- 2 -- 0 -- 6 -- | 2 0 -- | -- -- 20 -- | | -- -- -- -- 20 -- | -- -- -- 20 -- --Genre/Form: -- 2 -- Additional physical formats: DDC classification: | LOC classification: | | 2Other classification:

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Action note: In: Summary: ABSTRACT: This study was done to determine the absorbency capacity of kaong powder. This was done through adsorption isotherm and adsorption kinetics. Solutions of known concentrations were prepared and kaong powder was added to the solutions. For adsorption isotherm, solutions with concentrations of 3, 6, 9, 12, 15, 18, 21,24, 27 and 30 ppm were used.Concentrations of 10, 20, 30, 40 and 50 ppm were prepared for adsorption kinetics. The kaong was first sun-dried until it was ready for powdering. After powdering, fifty percent of the samples were treated with 85% EDTA solution. The, the samples were added to solutions of known concentration. After that, the samples were analysed using AAS to determine changes in concentration. Drops of 1:1 nitric acid were also added to the samples to prevent precipitation of the metals. Then, the data was treated statistically to determine significant differences. There were varying results that were obtained from the study. The results varied with different concentrations. The treatment of EDTA to the samples also had an effect on the results. In adsorption isotherm, there was greater absorbency in smaller concentrations than the larger ones. The samples treated with EDTA showed more efficiency than non-EDTA samples. In adsorption kinetics, there was also greater absorbency in smaller concentrations. It was also found out that there was greater absorbency as more time elapsed after addition of the kaong powder to the samples of known concentrations. The results were still better with the samples that were treated with EDTA. Other editions:

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Item type	Current location	Home library	Collection	Call number	Status	Date due	Barcode	Item holds
Book	PLM	PLM Filipiniana Section	Filipiniana-Thesis	T QD1.K38.2005 (Browse shelf)	Available		FT4147

Total holds: 0

Thesis: (Bachelor of Science in Chemistry)- Pamantasan ng Lungsod ng Maynila, 2005. 56

ABSTRACT: This study was done to determine the absorbency capacity of kaong powder. This was done through adsorption isotherm and adsorption kinetics. Solutions of known concentrations were prepared and kaong powder was added to the solutions. For adsorption isotherm, solutions with concentrations of 3, 6, 9, 12, 15, 18, 21,24, 27 and 30 ppm were used.Concentrations of 10, 20, 30, 40 and 50 ppm were prepared for adsorption kinetics. The kaong was first sun-dried until it was ready for powdering. After powdering, fifty percent of the samples were treated with 85% EDTA solution. The, the samples were added to solutions of known concentration. After that, the samples were analysed using AAS to determine changes in concentration. Drops of 1:1 nitric acid were also added to the samples to prevent precipitation of the metals. Then, the data was treated statistically to determine significant differences. There were varying results that were obtained from the study. The results varied with different concentrations. The treatment of EDTA to the samples also had an effect on the results. In adsorption isotherm, there was greater absorbency in smaller concentrations than the larger ones. The samples treated with EDTA showed more efficiency than non-EDTA samples. In adsorption kinetics, there was also greater absorbency in smaller concentrations. It was also found out that there was greater absorbency as more time elapsed after addition of the kaong powder to the samples of known concentrations. The results were still better with the samples that were treated with EDTA.

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