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The objective of this study was to convert wheat straw to metal ion adsorbent for waste water treatment. Ground wheat straw particles were modified with 0.5M citric acid to activate its natural adsorption capacity. The biosorption characteristics of Pb(II) onto modified wheat straw (MWS) gel, were evaluated as a function of pH, time, biomass dosage, initial concentration and temperature. Within the...
The dead leaves of plane tree were investigated as a low-cost biosorbent for the removal of Cu2+ from aqueous solution in a batch system. Different environmental factors such as initial Cu2+ concentration, contact time, biosorbent dose, temperature and pH were studied. The sorption was found to be maximum in natural medium and increases with increase in initial concentration. Langmuir, Freundlich...
Bio-sorption of Pb2+ ion from wastewater with Chlorella was investigated in the batch mode. The influence of pH of the solution, biosorbents dose, concentration of ions and contact time on bio-sorption capacity of Pb2+ ions was studied. The studies revealed that Pb2+ ions uptake rate was rather slow, with 75% of the total amount occurring in the first 10min for Chlorella. The optimum pH for bio-sorption...
In the paper, the biosorption of Pb(II)and Cu(II) ions from contaminated water using a bacterial strain was studied in a batch system. The bacterial strain isolated from heavy metals-contaminated soil was identified as Bacillus sp. The optimum conditions of biosorption were determined. Lead and copper were removed effectively at the concentration that was lower than 100 mg/L. And the concentration...
The kinetics of biosorption and desorption to lead ions on dried and wet wasted beer yeast were investigated with the instruments of AAS and SEM. In order to enhance the experimental results reliability and practice application value, the sorption solution system was gone on “L”-degree dosage level in the whole experimental process. The results showed that the biosorption and desorption process were...
In the present study we reported the feasibility of Pseudomonas alcaligenes biomass as an alternative biosorbent to remove Pb(II) metallic ions from environmental and industrial wastewater. The ability of Pseudomonas alcaligenes to remove the metallic ions was investigated by using batch biosorption procedure. The effects such as, pH, biosorbent dosage, sorbate concentrations and sorbate-sorbent contact...
Biosorption is fast becoming an attractive method for heavy metal contaminated wastewater treatment. This paper investigates the uptake capacity and removal of lead (II) by Pleurotus ostreatus biomass under the influence of biomass concentration, initial pH of heavy metal containing solution, contact time and initial Pb(II) concentration as to ascertain the usability of the biomass as biosorbent for...
In the present study we reported the feasibility of extracellular biopolymer(BC11) produced by Bacillus cereus as an alternative biosorbent to remove Pb(II) metallic ions from environmental and industrial wastewater. The ability of BC11 to remove the Pb(II) ions was investigated by using batch biosorption procedure. The effects such as pH, dosage of biosorbent, Pb(II) initial concentration and sorbate-sorbent...
The Pb(II) biosorption characteristics of Pseudomonas fluorescens PFC02 biomass was examined as a function of initial pH, contact time and initial metal ion concentration. FTIR spectra showed that the principal functional sites taking part in the sorption process included carboxyl , hydroxyl groups and -CH3 stretching groups, the mechanism analysis showed that the chemical chelating was the main adsorption...
An extracellular biopolymer (PS-2) produced by Pseudomonas fluorescence C-2 was used as an alternative biosorbent to remove toxic Pb(II) metallic ions from aqueous solutions. The prepared biosorbent PS-2 were characterized by FTIR and SEM. The effect of experimental parameters such as pH, dosage of biosorbent , Pb(II) initial concentration and contact time on the adsorption was studied. It was found...
The biosorption of Pb(II) ions on dried wasted beer yeast was investigated with respect to the adsorption conditions. The results of this study indicated that different variables, such as contact time, adsorbent dose, solution pH and initial heavy metal ions concentration influenced the adsorptive quantity. The best adsorption parameters and quantitative analysis of Pb2+ by dried waste beer yeast...
The mechanism of Pb ( II ) biosorption by Saccharomyces Cerevisiae is investigated by scanning electron microscopy-energy dispersive x-ray (SEM-EDX) spectroscopy, Fourier transform infrared(FTIR) spectroscopy and x-ray photoelectron spectroscopy(XPS). The SEM figures show that the shapes of Saccharomyces Cerevisiae cells doesn't obviously change after the adsorption,but there are many "spots"...
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