Heavy Metals Biosorption by Powdered Rhizopus Oligosporus Biomass
The biosorption of several metals by powdered biomass of Rhizopus oligosporus was investigated. Cells of Rhizopus olzgosporus were cultured, harvested, washed, oven dried and mixed in solutions containing lead, copper, cadmium and aluminium ions. After an equilibration period, the biomass was se...
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| Format: | Thesis |
| Language: | English English |
| Published: |
1997
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10004/1/FK_1997_7_A.pdf |
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| Summary: | The biosorption of several metals by powdered biomass of
Rhizopus oligosporus was investigated. Cells of Rhizopus olzgosporus were
cultured, harvested, washed, oven dried and mixed in solutions containing lead,
copper, cadmium and aluminium ions. After an equilibration period, the
biomass was separated from the metal bearing solution and the content of heavy
metals were determined by an Atomic Adsorption Spectrophotometer. The
biosorption of metal ions was increased with increasing initial concentration of
heavy metal. The heavy metal uptake capacity increased in the order: copper
(73.50 mg/g) > lead (60.90 mg/g) > cadmium (30.15 mg/g) > aluminium (26.60
mg/g). Langmuir Adsorption Model was suitable for describing the biosorption
of lead, cadmium, aluminium and copper. Reciprocal Langmuir
Transformation and Scatchard analysis revealed that different types of binding
sites are involved in the biosorption process. pH regulation of the process can enhance the biosorption capacity for all metals tested The optimum pH for
lead, cadmium, aluminum and copper are 5, 4, 4 and 6 respectively The
possibility for desorption the metals from loaded biomass usmg HCI and NaOH
were tested The desorption efficiency for HCl and NaOH increased with
Increasing concentration of HCl and NaOH HCl was more efficient than
NaOH The possibility of removing heavy metal from industrial wastes was
also investigated For electroplating wastes, the heavy metals uptake capacities
Increased m the order lead (0.44 mg/g) > cadmium (0.11 mg/g) > copper (0.09
mg/g) For aluminum wastes, the heavy metals uptake capacities increased In
the order cadmium (0.12 mg/g) > copper (0.10 mg/g). |
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