Biosorption of heavy metals by Zoogloea ramigera: use of adsorption isotherms and a comparison of biosorption characteristics

Sağ, Yeşim; Kutsal, Tülin

doi:10.1016/0923-0467(95)03014-x

Cited by 86 publications

(39 citation statements)

References 18 publications

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“…At lower pH, the surface charge of the adsorbent became positive, which inhibited the approach of positively charged metal ions. In addition, protons in the solution competed with metal ions for binding sites, thereby decreasing the interaction of metal ions with the adsorbent [21]. When the pH was increased, protons began to be desorbed, and the metal ions hooked up the free binding sites.…”

Section: Effect Of Phmentioning

confidence: 99%

“…At 45°C, the biosorption capacity reached a maximum, 197.80 ± 8.73 mg·g -1 for Pb(II) and 119.25 ± 6.11 mg·g -1 for Zn(II). Temperature affected the biosorption usually by infl uencing the stability of the metal-biosorbent complex and the ionization of the functional groups [21]. Elevated biosorption capacity at higher temperature indicated that the biosorption of Pb(II) and Zn(II) on EPS F2 may be endothermic processes.…”

Section: Biosorption Thermodynamicsmentioning

confidence: 99%

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Biosorption of Pb(II) and Zn(II) by Extracellular Polymeric Substance (Eps) of Rhizobium Radiobacter: Equilibrium, Kinetics and Reuse Studies

Wang¹,

Yang²,

Chen³

et al. 2013

Archives of Environmental Protection

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Abstract:The extracellular polymeric substance (EPS) produced from Rhizobium radiobacter F2, designated as EPS F2 , was investigated as a biosorbent for the removal of Pb(II) and Zn(II) from aqueous solution. The optimum biosorption pH values were 5.0 for Pb(II) and 6.0 for Zn(II). Kinetics study revealed that the biosorption followed pseudo-fi rst-order model well, and the equilibrium data fi t the Langmuir model better. The adsorbed metal ions could be effectively desorbed by HCl. Desrobed EPS F2 regained 80% of the initial biosorption capacity after fi ve cycles of biosorption-desorption-elution. These results demonstrated that EPS F2 could be a promising alternative for Pb(II) and Zn(II) removal from aqueous solution. INTRODUCTIONMany industries (e.g. electroplating, metallurgy, textile, mining, ceramic, etc.) discharge aqueous effl uents containing heavy metals into aquatic ecosystem [1]. These heavy metals are persistent environmental contaminants since they could not be degraded or destroyed [2]. Due to the toxic effects on humans, animals and environmental balances, heavy metal pollution has raised a great concern [3].Lead and zinc are among those metals widely used in industry and their accumulation in the living tissues may pose serious health problems. It has been reported that constant exposure to lead can cause damage to organs (including the liver, kidney and heart) and disturbances of the immune system [4]. Zinc is an essential element for living organisms because of its important role in forming red blood cells and biosynthesis of nucleus acids/polypeptides, but it may cause accumulative poisoning, including dehydration, electrolyte imbalance, stomachache, nausea, dizziness and loss of muscle coordination [5]. Thus removal of these metals from aqueous phase is of great importance with respect to environmental and economic considerations [3]. Unfortunately, most of these methods have disadvantages such as low effi ciency, poor regeneration, and yielding large amounts of metallic sludge [7]. Biosorption technology, one of the emerging methods for metal removal, has been regarded as a cheaper and more effective alternative [8]. Biological materials used as biosorbents include bacteria, algae, fungi, yeast, and their derivatives [9]. Recently, extracellular polymeric substances (EPSs), produced by microorganisms during their growth, are found to be effective for the removal of heavy metals (e.g. lead, copper, cadmium, manganese, and zinc) from wastewaters [10,12]. The chemical structures of EPSs, being rich in functional groups of carboxyl, hydroxyl, and amino groups, are considered as the main contributor for metal removal [13,14]. Besides the ability of binding with heavy metals, EPSs also possess advantage of aggregation of pollutant particles, stabilization of the fl oc structure, formation of a protective barrier, and retention of water [13]. Moreover, the EPSs are usually composed of a variety of easily biodegradable organic substances, such as carbohydrates, proteins, minor uronic acids, and ...

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Section: Effect Of Phmentioning

confidence: 99%

Section: Biosorption Thermodynamicsmentioning

confidence: 99%

Biosorption of Pb(II) and Zn(II) by Extracellular Polymeric Substance (Eps) of Rhizobium Radiobacter: Equilibrium, Kinetics and Reuse Studies

Wang¹,

Yang²,

Chen³

et al. 2013

Archives of Environmental Protection

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“…In raw water, the dominant bacteria was the iron-oxidizing bacteria Sediminibacterium (19.2%) (Wang et al, 2012), and other iron-respiring bacteria and nitrate-reducing bacteria were found at levels below 0.8%. In the effluent of the DWDS with chlorine, nitrate-reducing bacteria associated with the redox cycling of iron (NRB-Fe) were found at 5.8%, and these included Zoogloea (2.75%) (Sag and Kutsal, 1995;Shapleigh, 2013), Aquabacterium (1.54%) (Straub et al, 2004), Azospira (0.63%) (Byrne-Bailey and Coates, 2012) and Dechloromonas (0.42%) (Weber et al, 2006b), as well as some genera at levels less than 0.3%. The percentage of Sediminibacterium decreased to 2.54%.…”

Section: Bacterial Community Composition Of the Bulk Water And Biofilmentioning

confidence: 99%

Characterization of the bacterial communities and iron corrosion scales in drinking groundwater distribution systems with chlorine/chloramine

Wang

Zhang

et al. 2014

International Biodeterioration & Biodegradation

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a b s t r a c tThe effect of chlorine and chloramine disinfection on bacterial communities and the corrosion of cast iron pipes was studied in drinking water distribution systems (DWDSs) transporting groundwater. aFeOOH was the main corrosion product for both systems. However, loose corrosion products were formed in DWDSs with chlorine, whereas dense crystallized particles were formed in DWDSs with chloramine. Based on the functional genes and pyrosequencing assay results, both DWDSs had different compositions of corrosion-related bacteria in the bulk water and biofilms. The percentage of total denitrifying gene copy numbers in the 16S rRNA and the bacterial diversities were much higher at 220 d within the bulk water and biofilm in DWDSs disinfected with chloramine compared with those disinfected with chlorine. Most of the NO 3 À eN in the raw water was biologically denitrified through chlorine DWDSs in the experimental period, whereas the same phenomena occurred only when denitrifying bacteria were increased in the effluent due to the role of autotrophic microbial nitrification in chloramine DWDSs. Furthermore, nitrate-dependent Fe(II) oxidation occurred to a greater extent, leading to denser corrosion scales in DWDSs with chloramine compared with those disinfected with chlorine.

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“…This can also be clarified by the exothermicity of the biosorption/bioaccumulation process. Temperature influences the interaction between the biomass and the metal ions, generally by impacting the stability of the metal-sorbent complex and the ionization of the cell wall moieties [44]. The temperature of the biosorption solution could be vital for energydependent mechanisms in metal binding process [45].…”

Section: Effect Of Temperaturementioning

confidence: 99%

Biosorptive Performance of Bacillus arsenicus MTCC 4380 Biofilm Supported on Sawdust/MnFe2O4 Composite for the Removal of As(III) and As(V)

Podder

Majumder

2016

Water Conserv Sci Eng

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One of the main environmental concerns of today is the occurrence of arsenic in wastewater. Targeting a solution for this problem, several efforts have been made towards research and application of cost-effective and effortlessly adaptable processes. The ability of a biofilm of Bacillus arsenicus MTCC 4380 supported on sawdust/MnFe 2 O 4 composite to biosorb/ bioaccumulate As(III) and As(V) was investigated in batch experiments. Optimum biosorption/bioaccumulation conditions were determined as a function of contact time and temperature. The equilibrium was achieved after about 220 min at 30°C temperature. Nonlinear regression analysis was done to determine the best-fit kinetic model based on three correlation coefficients and three error functions and also to predict the parameters involved in kinetic models. The results showed that both Brouers-Weron-Sotolongo and Avrami models for both As(III) and As(V) were capable of providing realistic explanation of biosorption/bioaccumulation kinetic. Applicability of mechanistic models showed that the rate controlling step in the biosorption/bioaccumulation of both As(III) and As(V) was film diffusion rather than intraparticle diffusion. The estimated thermodynamic parameters ΔG 0 , ΔH 0 , and ΔS 0 revealed that biosorption/bioaccumulation of both As(III) and As(V) was feasible, spontaneous, and exothermic under examined conditions. The activation energy (E a ) estimated from Arrhenius equation specified the nature of biosorption/bioaccumulation being ion exchange type. The effect of co-existing ions such as Cu 2+ , Zn 2+ , Bi 3+ , Cd 2+ , Fe 3+ , Pb 2+ , Co 2+ , Ni 2+ , Cr 6+ , and SO 4 2− at different concentrations was inspected.

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Biosorption of heavy metals by Zoogloea ramigera: use of adsorption isotherms and a comparison of biosorption characteristics

Cited by 86 publications

References 18 publications

Biosorption of Pb(II) and Zn(II) by Extracellular Polymeric Substance (Eps) of Rhizobium Radiobacter: Equilibrium, Kinetics and Reuse Studies

Biosorption of Pb(II) and Zn(II) by Extracellular Polymeric Substance (Eps) of Rhizobium Radiobacter: Equilibrium, Kinetics and Reuse Studies

Characterization of the bacterial communities and iron corrosion scales in drinking groundwater distribution systems with chlorine/chloramine

Biosorptive Performance of Bacillus arsenicus MTCC 4380 Biofilm Supported on Sawdust/MnFe2O4 Composite for the Removal of As(III) and As(V)

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