Reactive Dye Removal Using Inorganic-Organic Composite Material

Kinetics, Mechanism, and Optimization

Khai Ern Lee, Norhashimah Morad, Tjoon Tow Teng, Beng Teik Poh

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

An inorganic-organic composite material (MCPAM) consisting of magnesium chloride and polyacrylamide, was applied to remove reactive dye (Cibacron Red FN-R) from aqueous solution through coagulation-flocculation process. MCPAM with the ratio of 90% MgCl2/10% PAM was the best ratio in removing reactive dye. Kinetics of reactive dye removal was investigated using pseudo-kinetics model and it fits pseudo-second-order reaction model. The mechanism of reactive dye removal was investigated through physicochemical properties of supernatant, flocs, and sludge. The change of conductivity and pH denotes the interactions between reactive dye and MCPAM. The chemical structure, settling, and microstructure of sludge indicate the formation of sludge during coagulation-flocculation process. The settled sludge volume and sludge volume index (SVI) that of MCPAM was lower than that of MgCl2. The flocs formed using MCPAM was also relatively compact and larger in size compared to that of MgCl2. The reactive dye removal was optimized through central composite design whereby color removal (%) and chemical oxygen demand (COD) reduction (%) were optimized by five operating factors, namely, concentration of dye, pH, dosage of MCPAM, agitation speed, and agitation time. The optimal values reported for color removal (%) and COD reduction (%) were of 97-98% and 60-81%, respectively.

Original languageEnglish
Pages (from-to)1557-1570
Number of pages14
JournalJournal of Dispersion Science and Technology
Volume35
Issue number11
DOIs
Publication statusPublished - 2014

Fingerprint

sludge
Coloring Agents
Dyes
dyes
Magnesium Chloride
optimization
Kinetics
composite materials
Composite materials
kinetics
Color removal (water treatment)
agitation
Chemical oxygen demand
Flocculation
coagulation
Coagulation
pulse amplitude modulation
magnesium chlorides
color
Pulse amplitude modulation

Keywords

  • Composite material
  • kinetics
  • mechanism
  • optimization
  • reactive dye

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Surfaces, Coatings and Films

Cite this

Reactive Dye Removal Using Inorganic-Organic Composite Material : Kinetics, Mechanism, and Optimization. / Lee, Khai Ern; Morad, Norhashimah; Teng, Tjoon Tow; Poh, Beng Teik.

In: Journal of Dispersion Science and Technology, Vol. 35, No. 11, 2014, p. 1557-1570.

Research output: Contribution to journalArticle

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