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dc.contributor.advisorCarsky, Milan.
dc.contributor.advisorPienaar, D. H.
dc.creatorMbhele, Njabulo.
dc.date.accessioned2011-05-10T13:00:07Z
dc.date.available2011-05-10T13:00:07Z
dc.date.created2005
dc.date.issued2005
dc.identifier.urihttp://hdl.handle.net/10413/2825
dc.descriptionThesis (M.Sc.)-University of KwaZulu-Natal, 2005.en_US
dc.description.abstractBiosorption is a property of certain type of inactive, microbial biomass to bind and concentrate heavy metals from even very dilute aqueous solutions. Biomass exhibits this property, acting just as a chemical substance, as an ion exchanger of biological origin. It is particularly the cell wall structure of certain algae that is found responsible for this phenomenon. In these experiments, the rate and extent for removal of copper is subjected to parameters such as pH, initial metal concentration, biosorbent size, contact time, temperature and the ability of the biomass to be regenerated in sorption-desorption experiments. The metal adsorption was found to be rapid within 25 minutes. The maximum copper uptake of 30 mg of copper / g of biomass has been observed, in the following conditions: 100 mg / L, 0.1 g of biomass, pH 4 and at temperature of 25°C. From this study, it was found that copper uptake is increasing with increase in pH, with optimum being pH 4. Copper uptake increases substantially from 0 to 25 minutes. Metal biosorption behaviour of raw seaweed Sargassum in six consecutive sorptiondesorption cycles were also investigated in a packed-bed column, during a continuous removal of copper from a 35 mg/l aqueous solution at pH 4. The sorption and desorption was carried out for an average of 85 and 15 hours, respectively, representing more than 40 days of continuous use of the biosorbent. The weight loss ofbiomass after this time was 13.5%. The column service time decreased from 25 hrs in the first cycle to 10 hrs for the last cycle.en_US
dc.language.isoenen_US
dc.subjectSewage--Purification--Biological treatment.en_US
dc.subjectHeavy metals--Environmental aspects.en_US
dc.subjectMarine algae--Effect of heavy metals on.en_US
dc.subjectTheses--Chemical engineering.en_US
dc.titleAdsorption of heavy metals on marine algae.en_US
dc.typeThesisen_US


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