Experimental studies on removal of microcystin-LR by peat

Cyanotoxins have caused worldwide concerns for their eclectic occurrence and toxic effects, which led to an intensive search of cost-effective techniques for their removal from contaminated waters. A range of biomaterials was tested for their efficacy to adsorb a potent cyanotoxin, microcystin-LR (M...

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Veröffentlicht in:	Journal of hazardous materials 2010-12, Vol.184 (1-3), p.417-424
Hauptverfasser:	Sathishkumar, M., Pavagadhi, S., Vijayaraghavan, K., Balasubramanian, R., Ong, S.L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Adsorption Applied sciences Biological and medical sciences Biological and physicochemical phenomena Biosorption Biotechnology Chemical engineering Desorption Exact sciences and technology Fundamental and applied biological sciences. Psychology Kinetics Marine Toxins Media Methods. Procedures. Technologies Microcystin-LR Microcystins - isolation & purification Microscopy, Electron, Scanning Models, Theoretical Natural water pollution Others Peat pH effect Pollution Searching Soil Spectroscopy, Fourier Transform Infrared Surface chemistry Surgical implants Various methods and equipments Water treatment and pollution
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Beschreibung
Zusammenfassung:	Cyanotoxins have caused worldwide concerns for their eclectic occurrence and toxic effects, which led to an intensive search of cost-effective techniques for their removal from contaminated waters. A range of biomaterials was tested for their efficacy to adsorb a potent cyanotoxin, microcystin-LR (MCLR). Among these sorbents, peat showed the maximum efficacy to sequester MCLR. The BET (Brunauer–Emmett–Teller) surface area of peat was found to be 12.134m2/g. The pH of the reaction media played a significant role in removal of MCLR; maximum adsorption occurred at pH 3. Kinetic studies showed that the adsorption of MCLR onto peat was a rapid process. The adsorption capacity (Qmax) from the Langmuir model was found to be 255.7μg/g at pH 3. Among various desorption media studied, strong alkali (2N NaOH) showed highest desorption (94%).
ISSN:	0304-3894 1873-3336
DOI:	10.1016/j.jhazmat.2010.08.051