Determination of the ability of inactivated and immobilized cells of Synechococcus PCC 7942 (cyanobacteria) to uptake metal ions from solution
- Univ. of Texas, El Paso, TX (United States)
Synechococcus 7942 has the ability to grow in mass quantity under ideal conditions; such an ability provides usable biomass at a minimal effort. Using lyophilized biomass grown under normal conditions, Synechococcus was tested for its potential to bind metal ions from solution. Batch experiments have determined the optimum binding pH, time dependency, and metal binding capacities for copper(II), lead(II), nickel(II), cadmium(II), chromium(III), and chromium(VI), along with desorption of the metal bound. The biomass studied showed an affinity for five of the metal ions, with an optimum binding at pH 5.0. Time dependency studies showed that this cyanobacteria had rapid binding, while capacity experiments showed this cyanobacteria strain to bind 11.3 mg of copper(II) per gram of biomass, 30.4 mg of lead(II) per gram of biomass, 3.2 mg of nickel(II) per gram of biomass, 7.2 mg of cadmium(II) per gram of biomass, and 5.4 mg of chromium(III) per gram of biomass. More than 90% of copper(II), lead(II), and nickel(II) metal ions were recovered, while over 50% of cadmium(II) and chromium(III) were recovered when treated with 0.1M HCl.
- Sponsoring Organization:
- National Insts. of Health, Bethesda, MD (United States)
- OSTI ID:
- 585725
- Report Number(s):
- CONF-9705104--
- Country of Publication:
- United States
- Language:
- English
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