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A study on removal characteristics of (Mn2+) from aqueous solution by CNT

Ahmed Kabashi, Nassereldeen and Muyibi, Suleyman Aremu and Mirghani, Mohamed Elwathig Saeed and Yahya, Farhana I. (2009) A study on removal characteristics of (Mn2+) from aqueous solution by CNT. World Academy of Science, Engineering and Technology, 59. pp. 349-353. ISSN 1307-6884

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Abstract

It is important to remove manganese from water because of its effects on human and the environment. Human activities are one of the biggest contributors for excessive manganese concentration in the environment. The proposed method to remove manganese in aqueous solution by using adsorption as in carbon nanotubes (CNT) at different parameters: The parameters are CNT dosage, pH, agitation speed and contact time. Different pHs are pH 6.0, pH 6.5, pH 7.0, pH 7.5 and pH 8.0, CNT dosages are 5mg, 6.25mg, 7.5mg, 8.75mg or 10mg, contact time are 10 min, 32.5 min, 55 min, 87.5 min and 120 min while the agitation speeds are 100rpm, 150rpm, 200rpm, 250rpm and 300rpm. The parameters chosen for experiments are based on experimental design done by using Central Composite Design, Design Expert 6.0 with 4 parameters, 5 levels and 2 replications. Based on the results, condition set at pH 7.0, agitation speed of 300 rpm, 7.5mg and contact time 55 minutes gives the highest removal with 75.5%. From ANOVA analysis in Design Expert 6.0, the residual concentration will be very much affected by pH and CNT dosage. Initial manganese concentration is 1.2mg/L while the lowest residual concentration achieved is 0.294mg/L, which almost satisfy DOE Malaysia Standard B requirement. Therefore, further experiments must be done to remove manganese from model water to the required standard (0.2 mg/L) with the initial concentration set to 0.294 mg/L.

Item Type: Article (Journal)
Additional Information: 4286/1209
Uncontrolled Keywords: Adsorption, CNT, DOE, Manganese, Parameters
Subjects: T Technology > TD Environmental technology. Sanitary engineering
T Technology > TP Chemical technology > TP248.13 Biotechnology
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User: Ms Zati Atiqah Mohamad Tanuri
Date Deposited: 28 Jul 2011 16:20
Last Modified: 12 Aug 2011 09:06
URI: http://irep.iium.edu.my/id/eprint/1209

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