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LEAD AND CADMIUM REMOVAL FROM AQUEOUS SOLUTION USING WASTE MATERIAL (MICROWAVE INCINERATED RICE HUSK ASH)

MOHD RUSSIN, SRI RAHA YU (2008) LEAD AND CADMIUM REMOVAL FROM AQUEOUS SOLUTION USING WASTE MATERIAL (MICROWAVE INCINERATED RICE HUSK ASH). Universiti Teknologi Petronas. (Unpublished)

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Abstract

Presence of heavy metals in aquatic systems has become a serious problem. Heavy metals such Cadmium (Cd) and Lead (Pb) are mostly resulted from industrial activities and adverse effects on environment as well as human health. As a result, there has been a great deal of attention given to new technologies for removal of heavy metal ions from contaminated waters. Commonly used treatment technologies were mostly effective, except for their high operational cost. Thus, this study proposed Microwave Incinerated Rice Husk Ash (MIRRA), locally available agricultural waste for the removal of Pb (II) and Cd (II) from synthetic wastewater by batch adsorption process. Adsorption involves separation of a substance from one phase accompanied by its accumulation or concentration at the surface of another. Influences of pH, initial metal concentration, contact time and absorbent dosage on the removal efficiency of those metals from aqueous solution were studied. pH 3.0 and 4.0 were found to be optimum condition for maximum adsorption of Pb (II) and Cd (II) ions from aqueous solution. The removal efficiency of both metals correlated with the contact time between adsorbent and adsorbate, initial metal concentration as well as adsorbent dosage. Adsorption of Pb (II) and Cd (IT) were reached equilibrium after 60 and 120 minutes respectively; with both found to be better fitted with pseudo second order kinetic model. The maximum removal percentage of Pb (II) and Cd (II) were achieved at an adsorbent loading weight of 400 mg and 200 mg correspondingly. The equilibrium adsorption capacity of adsorbent used for Pb (II) and Cd (II) was calculated to be Langmuir and Freundlich respectively. The experimental data were found to fit the Langmuir isotherm for Pb (II) (R2 = 0.9991) and Freundlich isothetm for Cd (II) (R2 = 0.7951 ).

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Water and environment - Environmental - Wastewater treatment
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:49
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/7316

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