Publication: Batch and continuous packed column studies of cadmium biosorption by hydrilla verticillata biomass.
Issued Date
2007
Resource Type
Language
eng
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Mahidol University
Bibliographic Citation
Journal of Bioscience and Bioengineering Vol. 103 No. 6 (2007), 509-513
Suggested Citation
Bunluesin, S., Kruatrachue, M., Pokethitiyook, P., Upatham, S., Lanza, G.R. Batch and continuous packed column studies of cadmium biosorption by hydrilla verticillata biomass.. Journal of Bioscience and Bioengineering Vol. 103 No. 6 (2007), 509-513. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/9898
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Title
Batch and continuous packed column studies of cadmium biosorption by hydrilla verticillata biomass.
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Abstract
The removal of heavy metal ions by the nonliving biomass of aquatic
macrophytes was studied. We investigated Cd biosorption by dry Hydrilla
verticillata biomass. Data obtained in batch experiments indicate that H.
verticillata is an excellent biosorbent for Cd. Cd was rapidly adsorbed and such
adsorption reached equilibrium within 20 min. The initial pH of the solution
affected Cd sorption efficiency. Results obtained from the other batch
experiments conformed well to those obtained using the Langmuir model. The
maximum adsorption capacity qmax for H. verticillata was 15.0 mg/g for Cd. The
breakthrough curve from the continuous flow studies shows that H. verticillata
in the fixed-bed column is capable of decreasing Cd concentration from 10 to a
value below the detection limit of 0.02 mg/l. The presence of Zn ions affected
Cd biosorption. It can be concluded that H. verticillata is a good biosorbent for
treating wastewater with a low concentration of Cd contaminants.