Biosorption of Heavy Metals by Dead <i>Streptomyces fradiae</i>

Simeonova, A.; Godjevargova, Tzonka; Ivanova, D.

doi:10.1089/ees.2006.0184

Cited by 25 publications

(19 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, 120 min were selected as an optimum contact time for further experiments. These results are in agreement with the reports of Selatnia et al [14] and Simeonova et al [16]. …”

Section: Effect Of Phsupporting

confidence: 94%

See 1 more Smart Citation

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

Kirova

Velkova

Stoytcheva

et al. 2015

Biotechnology & Biotechnological Equipment

View full text Add to dashboard Cite

Biosorption of Pb(II) ions from a model solution was investigated using Streptomyces fradiae biomass as biosorbent pretreated with sodium hydroxide. The mycelium is a waste product from the biotechnological production of the macrolide antibiotic tylosin in the pharmaceutical industry. The biosorption study was conducted in a batch system with respect to initial pH, initial metal concentration and contact time. For a description of the biosorption equilibrium, Langmuir and Freundlich adsorption models were used. Equilibrium data fitted better to the Langmuir model and the calculated maximum biosorption capacity was 138.88 mg¢g ¡1 at initial pH 5.0, contact time of 120 min, biosorbent dose of 1 g¢dm ¡3and concentration range for the Pb(II) ions from 10 to 200 mg¢dm ¡3 . Pseudo-first and pseudo-second order kinetic models were applied to the experimental data. The results indicated that the Pb(II) uptake process followed the Ho equation. The interference of co-present ions Cu(II) and Zn(II) on the Pb(II) biosorption was also studied. It was determined that at the highest Pb(II) concentration (200 mg¢dm ¡3 ) Cu(II) and Zn(II) caused 27.22% and 24.88% decreasing in Pb(II) uptake, respectively. The obtained results could be useful in prospective applications of chemically modified waste mycelium of S. fradiae as an alternative biosorbent for Pb(II) removal from aqueous solutions.

show abstract

“…Thus, 120 min were selected as an optimum contact time for further experiments. These results are in agreement with the reports of Selatnia et al [14] and Simeonova et al [16]. …”

Section: Effect Of Phsupporting

confidence: 94%

“…To the best of our knowledge, only Simeonova et al [16] and Kirova et al [17] have studied the possibilities for application of dead mycelium of tylosin-producing Streptomyces fradiae for Cu(II), Zn(II) and Ni(II) removal from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

Kirova

Velkova

Stoytcheva

et al. 2015

Biotechnology & Biotechnological Equipment

View full text Add to dashboard Cite

show abstract

“…Thus, removing Cd from wastewater before it is discharged into natural bodies of water is necessary. Sorption through biomass is now recognized as an alternative method for the treatment of wastewaters that contain heavy metals (Saeed and Iqbal, 2003;Abbas et al, 2008;Simeonova et al, 2008;Lu et al, 2009;Santos et al, 2011). However, many of these methods are neither effective nor economical, especially when used to reduce heavy metal ions to low concentrations (Amini et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, considerable amount of interest has been given to the use of sorbent materials, particularly biosorbents, such as wheat straw (Dang et al, 2009), peanut shell (Witek-Krowiak et al, 2011), leaf powder (Nagpal et al, 2011), Ceiba pentandra hull powder (Ramana et al, 2012), bael leaves (Chakravarty et al, 2010b), maple wood sawdust (Rahman and Islam, 2009) and microbes (Merroun and Selenska-Pobell, 2008). Sorption through biomass is now recognized as an alternative method for the treatment of wastewaters that contain heavy metals (Saeed and Iqbal, 2003;Abbas et al, 2008;Simeonova et al, 2008;Lu et al, 2009;Santos et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Cadmium(II) biosorption from aqueous solutions using Hydrilla verticillata

Yan

Zhang

et al. 2012

Can J Chem Eng

View full text Add to dashboard Cite

The kinetics and equilibrium of cadmium biosorption from aqueous solutions were investigated using fresh tissues of Hydrilla verticillata. The biosorptive characteristics of cadmium ions were studied with respect to well-established effective parameters, including pH, temperature and contact time. The biosorptive capacity of H. verticillata for cadmium increased with increasing pH. In addition, the resulting isotherms were welldescribed by Langmuir and extended Langmuir models (R 2 = 0.9794-0.9957 and 0.9880, respectively). The comparison between calculated and experimental q e values showed that the extended Langmuir model had a better simulation for the cadmium biosorption by H. verticillata than the Langmuir isotherm model. The equilibrium biosorption data at a constant temperature were well-interpreted by the Langmuir model. The maximum biosorptive capacity increased from 33.54 to 37.46 mg/g when the solution temperature was increased from 278 to 298 K. Other various thermodynamic parameters were also estimated. Biosorptive equilibrium was established within approximately 20 min. Moreover, the pseudosecond-order equation was more appropriate in predicting biosorptive capacity than the pseudo-first-order equation. In practical viewpoints, the abundant and inexpensive plant biomass H. verticillata can be used as an effective and environmentally friendly biosorbent for the detoxification of cadmium from aqueous solutions.

show abstract

“…Synthetic carriers have higher stability than natural ones [40,41]. For mechanical stability, free or immobilized biomass can be cross-linked: so-called stapling reagents are added to the biomass and/or polymer suspension: phthalic anhydride, glutaraldehyde, epichlorhydrin, which lead to the formation of stable cell aggregates [42]. For mechanical stability, free or immobilized biomass can be cross-linked: so-called stapling reagents are added to the biomass and/or polymer suspension: phthalic anhydride, glutaraldehyde, epichlorhydrin, which lead to the formation of stable cell aggregates [42].…”

Section: Immobilization Techniques and Carriersmentioning

confidence: 99%

Immobilized microbial biosorbents for heavy metals removal

Velkova

Kirova

Stoytcheva

et al. 2018

Engineering in Life Sciences

View full text Add to dashboard Cite

Intensive industrial and urban growth has led to the release of increasing amounts of environmental pollutants. Contamination by metals, in particular, deserves special attention due to their toxicity and potential to bioaccumulate via the food chain. Conventional techniques for the removal of toxic metals, radionuclides and precious metals from wastewater all have a number of drawbacks, such as incomplete metal extraction, high cost and risk of generating hazardous by‐products. Biosorption is a cost‐effective and environment‐friendly technology, an alternative to conventional wastewater treatment methods. Biosorption is a metabolically independent process, in which dead microbial biomass is capable of removal and concentrating metal ions from aqueous solutions. Free microbial biosorbents are of small size and low density, insufficient mechanical stability and low elasticity, which causes problems with metal ion desorption, separation of the sorbent from the medium and its regeneration. Hence, the possibilities for the implementation of continuous biosorbent processes for metal removal in flow‐type reactor systems are reduced and the practical application of biosorption in industrial conditions is limited. By immobilizing microbial biomass on suitable carriers the disadvantages of free biosorbents are eliminated and more opportunities for practical use of biosorption become available. This review examines different immobilization techniques and carriers, certain basic features and possibilities of using immobilized microbial biosorbents for the removal and concentration of metals from aqueous solutions.

show abstract

Biosorption of Heavy Metals by Dead Streptomyces fradiae

Cited by 25 publications

References 16 publications

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

Biosorption of Pb(II) ions from aqueous solutions by waste biomass ofStreptomyces fradiaepretreated with NaOH

Cadmium(II) biosorption from aqueous solutions using Hydrilla verticillata

Immobilized microbial biosorbents for heavy metals removal

Contact Info

Product

Resources

About