Characteristics of metal removal using carboxylated alginic acid

Carboxylated alginic acid prepared through oxidation reaction with potassium permanganate had a high uptake capacity of 3.1 mmol/g dry mass at pH 4 and showed higher affinity to heavy metals compared to alkaline metals (Ca 2+, Mg 2+) in mixed metal system. The pH zpc value of the carboxylated algini...

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Bibliographic Details
Published in:Water research (Oxford) 2002-04, Vol.36 (7), p.1814-1824
Main Authors: Jeon, Choong, Park, Jae Yeon, Yoo, Young Je
Format: Article
Language:English
Subjects:
Adsorption
Alginates - chemistry
Applied sciences
Biomass
Carboxylated alginic acid
Desorption
Exact sciences and technology
Glucuronic Acid
Heavy metals
Hexuronic Acids
Hydrogen-Ion Concentration
Industrial wastewaters
Lead - isolation & purification
Magnetic Resonance Spectroscopy
Metal removal
Metals - isolation & purification
Osmolar Concentration
Pollution
Polysaccharides
Protons
Spectrophotometry, Infrared
Temperature
Wastewaters
Water Purification - methods
Water treatment and pollution
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Summary:Carboxylated alginic acid prepared through oxidation reaction with potassium permanganate had a high uptake capacity of 3.1 mmol/g dry mass at pH 4 and showed higher affinity to heavy metals compared to alkaline metals (Ca 2+, Mg 2+) in mixed metal system. The pH zpc value of the carboxylated alginic acid was 2.31, which was lower than pH zpc (2.83) of natural alginic acid. The increased number of carboxyl groups was confirmed by IR and 13C-NMR spectrum analysis, elemental analysis and carboxyl group number count. Lead adsorption by carboxylated alginic acid is an endothermic process since binding was increased as the temperature increased. When the temperature of wastewater is higher than room temperature, carboxylated alginic acid has an advantage over general adsorbents whose uptake capacity decreases as the temperature increases. Also, lead adsorbed on carboxylated alginic acid was desorbed effectively by about 80% by nitrilotriaceticacid.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(01)00389-X