Preparation and characterization of imino diacetic acid functionalized alginate beads for removal of contaminants from waste water: I. methylene blue cationic dye model

This study deals with the development of a clean and safe process for water pollution remediation. We studied the potential use of Imino Diacetic Acid (IDA) activated calcium alginate beads for removal of cationic dyes from colored effluents in dynamic batch mode. Methylene blue (MB) has been chosen...

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Bibliographic Details
Published in:Desalination and water treatment 2012-02, Vol.40 (1-3), p.15-23
Main Authors: MOHY ELDIN, Mohamed Samir, ALI SOLIMAN, Emad, FATTAH ELZATAHRY, Ahmed Abdel, RAMADAN ELAASSAR, Mohamed, FAROUK ELKADY, Marwa, ABDEL RAHMAN, Aref Mohamed, ELSAYED YOSSEF, Mohamed, YOSSRI EWEIDA, Bassant
Format: Article
Language:English
Subjects:
Activated
Adsorption
Alginates
Alginic acid
Applied sciences
Beads
Benzoquinone
Calcium
Calcium alginate
Calcium chloride
Calcium ions
Cationic dyes
Cations
Color removal
Contaminants
Crosslinking
Dyes
Effluents
Exact sciences and technology
Mathematical models
Methylene blue
Parameter modification
pH effects
Pollutant removal
Pollution
Quinones
Reaction time
Regeneration
Regeneration (biological)
Removal
Seaweed meal
Surface chemistry
Temperature
Wastewater
Wastewater treatment
Water pollution
Water treatment and pollution
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Summary:This study deals with the development of a clean and safe process for water pollution remediation. We studied the potential use of Imino Diacetic Acid (IDA) activated calcium alginate beads for removal of cationic dyes from colored effluents in dynamic batch mode. Methylene blue (MB) has been chosen as a dye model for the study. The parameters that affect the beads surface modification process such as rho -benzoquinone (PBQ) and IDA concentration, reaction time, pH, temperature and finally cross linking time in calcium chloride solution were studied. Maximum percents of dye removal are about 65% and 90% were achieved at initial MB concentration of 50 mg l super(-1) after 60 min of adsorption at temperature (22 plus or minus 1 degree C) for calcium alginate and IDA activated calcium alginate beads respectively. Surface modification reduces the competitive action of calcium ions especially at high bead's crosslinking degree. Removal percentage was doubled using modified alginate beads cross linked for 120 min at 2% CaCl sub(2). In conclusion, the modified alginate beads show higher affinity towards MB adsorption where removed 80% of the dye content after only 10 min compared with 48% for the unmodified beads. Regeneration of the beads was also tested and fast process was observed which provide us with possibility of reuse.
ISSN:1944-3994
1944-3986
DOI:10.1080/19443994.2012.671136