alexa Cadmium biosorption on Spirulina platensis biomass.
Agri and Aquaculture

Agri and Aquaculture

Journal of Aquaculture Research & Development

Author(s): Solisio C, Lodi A, Soletto D, Converti A

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Abstract Dry biomass of Spirulina platensis re-hydrated for 48 h was employed as a biosorbent in tests of cadmium(II) removal from water. Various concentrations of biomass (from 1 to 4 g l(-1)) and metal (from 100 to 800 mg l(-1)) were tested. Low biomass levels (X(o)2 g l(-1)) ensured metal removal up to 98\% only at Cd(0)= 100 and 200 mg l(-1), while X(o)2.0 g l(-1) were needed at Cd(0)=400 mg l(-1) to achieve satisfactory results. Whereas X(o)=4.0 g l(-1) was effective to remove up to Cd(0)=500 mg l(-1), a further increase in metal concentration (Cd(0)=600 and 800 mg l(-1)) led to progressive worsening of the system performance. At a given biomass levels, the kinetics of the process was better at low Cd(2+) concentrations, while, raising the adsorbent level from 1.0 to 2.0 g l(-1) and then to 4.0 g l(-1), the rate constant of biosorption increased by about one order of magnitude in both cases and the adsorption capacity of the system progressively decreased from 357 to 149 mg g(-1). This article was published in Bioresour Technol and referenced in Journal of Aquaculture Research & Development

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