Journal
JOURNAL OF ENVIRONMENTAL SCIENCES
Volume 21, Issue 4, Pages 539-544Publisher
SCIENCE PRESS
DOI: 10.1016/S1001-0742(08)62305-0
Keywords
lead removal; carbon nanotubes; kinetic modeling; adsorption
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Funding
- Kulliyyah of Engineering (KOE)
- Department of Biotechnology Engineering
- HUM
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The capability of carbon nanotubes (CNTs) to adsorb lead (Pb) in aqueous solution was investigated. Batch mode adsorption experiment was conducted to determine the effects of pH, agitation speed, CNTs dosage and contact time. The removal of Pb(II) reached maximum value 85% or 83% at pH 5 or 40 mg/L of CNTs, respectively. Higher correlation coefficients from Langmuir isotherm model indicates the strong adsorptions of Pb(II) on the surface of CNTs (adsorption capacity X-m = 102.04 mg/g). The results indicates that the highest percentage removal of Ph (96.03%) can be achieved at pH 5, 40 mg/L of CNTs, contact time 80 min, and agitation speed 50 r/min.
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