The process of biosorption of heavy metals in bioreactors loaded with sanitary sewage sludge

Barros, Aldre Jorge Morais; Prasad, Shiva; Leite, Valderí Duarte; Souza, A. G.

doi:10.1590/s0104-66322006000200001

Cited by 18 publications

(8 citation statements)

References 11 publications

(10 reference statements)

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“…Not only do these techniques have significant disadvantages, including incomplete metal removal, but they are also costly and generate new products (Iqbal and Edyvean, 2007;Barros et al, 2006). New techniques must be developed to meet environmental standards at an affordable cost (Chen and Pan, 2005).…”

Section: Introductionmentioning

confidence: 99%

Biosorption of lead by maize (Zea mays) stalk sponge

García-Rosales

Colín-Cruz

2010

Journal of Environmental Management

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Section: Introductionmentioning

confidence: 99%

Biosorption of lead by maize (Zea mays) stalk sponge

García-Rosales

Colín-Cruz

2010

Journal of Environmental Management

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“…Physicochemical methods such as chemical precipitation, solvent extraction, chemical oxidation, biological treatments and ion exchange processes have been employed for heavy metal removal from industrial wastewaters (Neamtu et al, 2004;Wahi et al, 2005;Rao and Rao, 2006;Chen and Zhao, 2009;Calero et al, 2009). These methods are sometimes expensive, are not effective at low metal concentrations, and produce sludge to be disposed of, although sludges can be good materials to remove heavy metals (Barros et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Removal of corper(II) Ions from aqueous solution by a lactic acid bacterium

Yılmaz

Tay

Kıvanç

et al. 2010

Braz. J. Chem. Eng.

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-Enterococcus faecium, a lactic acid bacterium (LAB), was evaluated for its ability to remove copper(II) ions from water. The effects of the pH, contact time, initial concentration of copper(II) ions, and temperature on the biosorption rate and capacity were studied. The initial concentrations of copper(II) ions used to determine the maximum amount of biosorbed copper(II) ions onto lyophilised lactic acid bacterium varied from 25 mg L -1 to 500 mg L -1 . Maximum biosorption capacities were attained at pH 5.0 and 6.0. Temperature variation between 20°C and 40°C did not affect the biosorption capacity of the bacterial biomass. The highest copper(II) ion removal capacity was 106.4 mg per g dry biomass. The correlation regression coefficients show that the biosorption process can be well defined by the Freundlich equation. The change in biosorption capacity with time was found to fit a pseudo-second-order equation.

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“…A small pilot plant with a three-zone contact settling was developed in a single vessel using anaerobically digested sludge as the biosorbent for the removal of Cu (II) ions. The efficient metal removal (similar to the batch experiments) of 90 mg/g of the [198] Sewage sludge Cr (VI), Ni (II) 90% a# [199] Microcystis aeruginosa Pb (II), Cd, (II), Hg (II) 80%, 90%, 90% a# [200] a Indicates the dry weight of the biosorbent; b Indicates the wet weight of the biosorbent; * Indicates batch biosorption experiments at laboratory scale; and # Indicates continuous biosorption experiments. Table 11.…”

Section: Application Of the Biosorption Process At Pilot Scalementioning

confidence: 57%

Application of Biosorption for Removal of Heavy Metals from Wastewater

Kanamarlapudi¹,

KumarChintalpudi²,

Muddada³

2018

Biosorption

183

109

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Fresh water accounts for 3% of water resources on the Earth. Human and industrial activities produce and discharge wastes containing heavy metals into the water resources making them unavailable and threatening human health and the ecosystem. Conventional methods for the removal of metal ions such as chemical precipitation and membrane filtration are extremely expensive when treating large amounts of water, inefficient at low concentrations of metal (incomplete metal removal) and generate large quantities of sludge and other toxic products that require careful disposal. Biosorption and bioaccumulation are ecofriendly alternatives. These alternative methods have advantages over conventional methods. Abundant natural materials like microbial biomass, agro-wastes, and industrial byproducts have been suggested as potential biosorbents for heavy metal removal due to the presence of metal-binding functional groups. Biosorption is influenced by various process parameters such as pH, temperature, initial concentration of the metal ions, biosorbent dose, and speed of agitation. Also, the biomass can be modified by physical and chemical treatment before use. The process can be made economical by regenerating and reusing the biosorbent after removing the heavy metals. Various bioreactors can be used in biosorption for the removal of metal ions from large volumes of water or effluents. The recent developments and the future scope for biosorption as a wastewater treatment option are discussed.

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The process of biosorption of heavy metals in bioreactors loaded with sanitary sewage sludge

Cited by 18 publications

References 11 publications

Biosorption of lead by maize (Zea mays) stalk sponge

Biosorption of lead by maize (Zea mays) stalk sponge

Removal of corper(II) Ions from aqueous solution by a lactic acid bacterium

Application of Biosorption for Removal of Heavy Metals from Wastewater

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