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Adsorption potential of kenaf for copper and nickel removal from aqueous solution

Heavy metal pollution is one of the environmental issues that become a concern due to their toxic effect to environment and human health. Adsorption has been widely used to remove heavy metals from industrial wastewater. Therefore, there is a need to explore new sources of an alternative and inexpen...

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Main Author: Zadeh, Maryam Rahmati
Format: Thesis
Language:English
Published: 2010
Online Access:http://psasir.upm.edu.my/id/eprint/40822/7/FK%202010%2026R.pdf
http://psasir.upm.edu.my/id/eprint/40822/
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spelling my.upm.eprints.408222015-10-22T08:12:52Z http://psasir.upm.edu.my/id/eprint/40822/ Adsorption potential of kenaf for copper and nickel removal from aqueous solution Zadeh, Maryam Rahmati Heavy metal pollution is one of the environmental issues that become a concern due to their toxic effect to environment and human health. Adsorption has been widely used to remove heavy metals from industrial wastewater. Therefore, there is a need to explore new sources of an alternative and inexpensive adsorbent for elimination of heavy metals. In this study, a series of batch experiment was conducted to study the adsorption potential of kenaf as a biosorbent for Cu (II) and Ni (II) removal from aqueous solutions. The specific objectives are to obtain adsorption isotherms, kinetics determination, and measure the adsorption capacity in batch and fixed bed column system. The single adsorption isotherm and kinetics were carried out at a constant temperature of 30+1°C using an incubator shaker operated at 200 rpm. Some of the parameters that affect the adsorption process such as pH, initial concentration of adsorbate, adsorbent dosage and contact time was determined. The column study experiment was conducted with 100 mg/L of individual heavy metal solution. The effect of bed depth was examined with a flow rate of 6 mL/min and different bed depths of 15, 20, 25 and 30 cm to obtain the adsorption capacity and exhaustion time by evaluating the breakthrough curves. Also, to determine the effect of different flow rates, the column study experiment was conducted at a constant bed depth (20 cm) with different flow rates of 4, 6, and 9 mL/min. The optimum pH was observed to be at pH 5.0 and 6.0 for Cu (II) and Ni (II), respectively. The equilibrium time of Cu (II) was determined at 3 hours and for Ni (II) was at 4.5 hours. The single component equilibrium of each metal was analyzed using the Langmuir and Freundlich models. Langmuir isotherm model showed rather better fit for Cu (II) adsorption based on the correlation coefficient (R2) values. As for Ni (II) adsorption, Freundlich isotherm model showed the better fit. The pseudo first-order and pseudo second-order models were used to describe adsorption kinetics of Cu (II) and Ni (II), respectively. The adsorption kinetics of these metal ions onto kenaf followed pseudo second-order model assuming chemisorptions mechanisms. The bed depth service time model (BDST) fitted well with experimental data due to the effect of bed depth. Thomas model also described well the adsorption parameters to determine the effect of flow rate on adsorption capacity and breakthrough curves. 2010-05 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/40822/7/FK%202010%2026R.pdf Zadeh, Maryam Rahmati (2010) Adsorption potential of kenaf for copper and nickel removal from aqueous solution. Masters thesis, Universiti Putra Malaysia.
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Heavy metal pollution is one of the environmental issues that become a concern due to their toxic effect to environment and human health. Adsorption has been widely used to remove heavy metals from industrial wastewater. Therefore, there is a need to explore new sources of an alternative and inexpensive adsorbent for elimination of heavy metals. In this study, a series of batch experiment was conducted to study the adsorption potential of kenaf as a biosorbent for Cu (II) and Ni (II) removal from aqueous solutions. The specific objectives are to obtain adsorption isotherms, kinetics determination, and measure the adsorption capacity in batch and fixed bed column system. The single adsorption isotherm and kinetics were carried out at a constant temperature of 30+1°C using an incubator shaker operated at 200 rpm. Some of the parameters that affect the adsorption process such as pH, initial concentration of adsorbate, adsorbent dosage and contact time was determined. The column study experiment was conducted with 100 mg/L of individual heavy metal solution. The effect of bed depth was examined with a flow rate of 6 mL/min and different bed depths of 15, 20, 25 and 30 cm to obtain the adsorption capacity and exhaustion time by evaluating the breakthrough curves. Also, to determine the effect of different flow rates, the column study experiment was conducted at a constant bed depth (20 cm) with different flow rates of 4, 6, and 9 mL/min. The optimum pH was observed to be at pH 5.0 and 6.0 for Cu (II) and Ni (II), respectively. The equilibrium time of Cu (II) was determined at 3 hours and for Ni (II) was at 4.5 hours. The single component equilibrium of each metal was analyzed using the Langmuir and Freundlich models. Langmuir isotherm model showed rather better fit for Cu (II) adsorption based on the correlation coefficient (R2) values. As for Ni (II) adsorption, Freundlich isotherm model showed the better fit. The pseudo first-order and pseudo second-order models were used to describe adsorption kinetics of Cu (II) and Ni (II), respectively. The adsorption kinetics of these metal ions onto kenaf followed pseudo second-order model assuming chemisorptions mechanisms. The bed depth service time model (BDST) fitted well with experimental data due to the effect of bed depth. Thomas model also described well the adsorption parameters to determine the effect of flow rate on adsorption capacity and breakthrough curves.
format Thesis
author Zadeh, Maryam Rahmati
spellingShingle Zadeh, Maryam Rahmati
Adsorption potential of kenaf for copper and nickel removal from aqueous solution
author_facet Zadeh, Maryam Rahmati
author_sort Zadeh, Maryam Rahmati
title Adsorption potential of kenaf for copper and nickel removal from aqueous solution
title_short Adsorption potential of kenaf for copper and nickel removal from aqueous solution
title_full Adsorption potential of kenaf for copper and nickel removal from aqueous solution
title_fullStr Adsorption potential of kenaf for copper and nickel removal from aqueous solution
title_full_unstemmed Adsorption potential of kenaf for copper and nickel removal from aqueous solution
title_sort adsorption potential of kenaf for copper and nickel removal from aqueous solution
publishDate 2010
url http://psasir.upm.edu.my/id/eprint/40822/7/FK%202010%2026R.pdf
http://psasir.upm.edu.my/id/eprint/40822/
_version_ 1643832823565516800
score 13.211869

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