Penyingkiran malakit hijau daripada larutan akues menggunakan karbon tiub nano

Aplikasi reka bentuk eksperimen

Translated title of the contribution: Removal of malachite green dye from aqueous solution using multi-walled carbon nanotubes: An application of experimental design

Siti Aminah Zulkepli, Md. Pauzi Abdullah, Wan Mohd Afiq Wan Mohd Khalik

Research output: Contribution to journalArticle

Abstract

An experimental design methodology was performed in the optimization of removal of malachite green dye by multi-walled carbon nanotubes. A Central Composite Design (25) was chosen to develop a mathematical model and determine the optimum condition for adsorption of malachite green by carbon nanotubes. Five experimental factors, namely initial dye concentration, mass of adsorbent, pH, contact time and agitation speed were studied. Maximum adsorption of malachite green was achieved at the suggested optimum conditions: initial dye concentration (20 ppm), weight of adsorbent (0.03 g), pH solution (7) contact time (17 min) and agitation speed (150 strokes per min). The experimental value of adsorption by multi-walled carbon nanotubes were found to be in good agreement with the predicted value (R2 = 0.922).The experimental equilibrium data were best fitted to isotherm model (Langmuir) and kinetic model (pseudo second-order) respectively. Maximum adsorption by carbon nanotubes at monolayer for malachite green was obtained at 112.36 mg/g while kinetic rate constant was calculated to be 0.0017 g mg-1 min-1.

Original languageMalay
Pages (from-to)258-271
Number of pages14
JournalMalaysian Journal of Analytical Sciences
Volume20
Issue number2
Publication statusPublished - 2016

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Carbon Nanotubes
Design of experiments
Coloring Agents
Adsorption
Adsorbents
Kinetics
Contacts (fluid mechanics)
Isotherms
Monolayers
Rate constants
Mathematical models
malachite green
Composite materials

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Penyingkiran malakit hijau daripada larutan akues menggunakan karbon tiub nano : Aplikasi reka bentuk eksperimen. / Zulkepli, Siti Aminah; Abdullah, Md. Pauzi; Khalik, Wan Mohd Afiq Wan Mohd.

In: Malaysian Journal of Analytical Sciences, Vol. 20, No. 2, 2016, p. 258-271.

Research output: Contribution to journalArticle

Zulkepli, Siti Aminah ; Abdullah, Md. Pauzi ; Khalik, Wan Mohd Afiq Wan Mohd. / Penyingkiran malakit hijau daripada larutan akues menggunakan karbon tiub nano : Aplikasi reka bentuk eksperimen. In: Malaysian Journal of Analytical Sciences. 2016 ; Vol. 20, No. 2. pp. 258-271.
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