Biosorption of cadmium, copper, lead and zinc by inactive biomass of Pseudomonas Putida

Abstract

The accumulation of Cd(II), Cu(II), Pb(II) and Zn(II) at mg L(-1) concentration levels by inactive freeze-dried biomass of Pseudomonas Putida has been investigated. These metals could be efficiently removed from diluted aqueous solutions. A contact time of 10 min was sufficient to reach equilibrium. The pH has a strong effect on metal biosorption and the optimal pH values were 6.0, 5.0-6.0, 6.0-6.5 and 7.0-7.5 for Cd(II), Cu(II), Pb(II) and Zn(II) respectively. Under these conditions there was 80% removal for all metals studied. The process of biosorption can be described by a Langmuir-type adsorption model. This model accounts for 98% of the data variance. The K(A) and q(max) parameters for each metal are strongly correlated (at confidence levels greater than 98%) with the metal acidity, quantified by the constant of the corresponding M(OH)(+) complex, thus confirming previous assertions by other authors.

Fungal Biosorption for Cadmium and Mercury Heavy Metal Ions Isolated from Some Polluted Localities in KSA

“…These results showed that both Alternaria alternata and Penicillium aurantiogriseum are suitable for using as cadmium and mercury accumulators in wastewater. Similar results with respect to biosorption of cadmium and other heavy metals by fungi and bacteria have been reported earlier (Chang et al, 1997;Puranik and Paknikar, 1999;Costa et al, 2001;Pardo et al, 2003;Kefala et al, 1999;Ghoslan et al, 1999;Say et al, 2001;Watanabe et al, 2003;Ozdemir et al, 2004;Ayangbenro, and Babalola, 2017). Kumar et al, (2014) 2.55 mg/g of Cr respectively.…”

Accumulation of some heavy metals by metal resistant avirulent Bacillus anthracis PS2010 isolated from Egypt

“…The accumulation of heavy metals by B. anthracis PS2010 was found to be decreased by increasing the temperatures to 45°C, these results agree with the results obtained by Mameri et al (1999), Prescott et al (2002) and Uslu and Tanyol (2006). The pH value is one of the main factors in the biosorption efficiency and binding to microorganisms (Babich and Stotzky, 1985;Lopez et al, 2000;Jalali et al, 2002;Pardo et al, 2003). Results indicate that pH 8 was optimum for Cd 2+ , Co 2+ and pH range 7-8 was the optimum for Cu 2+ uptake.…”

Use of Escherichia coli Immobilized on Amberlite XAD-4 as a Solid-Phase Extractor for Metal Preconcentration and Determination by Atomic Absorption Spectrometry

“…For pH values higher than the optimum values, the retention decreases again because of the formation of hydroxylated complexes of the metal. 26 …”