The biosorption of Cr(VI) ions by dried biomass obtained from a chromium-resistant bacterium

Nguema, Paul Fabrice; Luo, Zhaohua; Lian, Jingjing

doi:10.1007/s11705-014-1456-4

Cited by 15 publications

(7 citation statements)

References 31 publications

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“…An increase in the loading capacities of the biomass with increasing metal ion concentrations is probably due to that the initial metal ion concentrations may provide a driving force that increases adsorption process and more of metal ions may compete for the limited sites of the biomass surface (Nguema et al, 2014). A decrease in the biosorption capacity with an increase in biomass dosage can be explained by "mass effect", meaning that aggregation of abundant biosorbents will cause an increment in the electrostatic interaction, an interference among binding sites and reduce the surface area available to Cu(II) ions (Nguema et al, 2014). Additionally, at the high biosorbent dosage, the available solute was insufficient to completely cover the available exchangeable sites on the biosorbent, thus causing low solute uptake (Tangaromsuk et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Bioremediation and extracellular synthesis of copper nanoparticles from wastewater using Yarrowia lipolytica AUMC 9256

El-Sayed

2018

Egypt. J. Bot.

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T HIS THE FIRST study describing the rapid extracellular synthesis of copper nanoparticles during the bioremediation of copper by living, autoclaved and dried biomass of Yarrowia lipolytica AUMC 9256. The time course growth in the presence of different concentrations of Cu(II) was studied. The minimum inhibitory concentration value of Y.lipolytica AUMC 9256 for Cu(II) was 1900mg/L. The cellular localization of bioaccumulated copper ions was assessed. Maximum uptake capacities were accomplished at pH 6.0, initial metal ion concentration 450mg/L, biomass dosage 1g/L and contact time 180min for live cells, 90min for autoclaved and 30min for dried biomass. Copper nanoparticles were characterized by UV-Visible spectrophotometer and transmission electron microscopy. They were all spherical in shape with an average size of 32.85nm (live), 22.34nm (autoclaved) and 15.62nm (dried). The occurrence of extracellular complexation, precipitation, adsorption onto cell wall and sequestration of needle-, rod-shaped precipitates within central large vacuole during Cu(II) uptake by live biomass were found out by transmission electron microscopy. Fourier Transform Infrared spectroscopy confirmed that mannans, phosphorus, P=S stretching, C-S stretching, M-O and ring deformation were more included in Cu(II) uptake by dried biomass. Energy dispersive X-ray microanalysis confirmed the presence of high-intensity characteristic peaks of Cu(II) and a sharp reduction of atomic % of phosphorus and potassium on the cell wall. X-ray powder diffraction patterns of Cu(II)-loaded biomass confirmed their crystalline nature. The removal of copper from ceramic industry wastewater was carried out by dried biomass effectively.

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Section: Discussionmentioning

confidence: 99%

Bioremediation and extracellular synthesis of copper nanoparticles from wastewater using Yarrowia lipolytica AUMC 9256

El-Sayed

2018

Egypt. J. Bot.

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“…The absorption peak at 3426.1 cm -1 is due to the stretching vibrations of -OH, -NH and intermolecular hydrogen bonding. The adsorption peak at 1080.6 cm -1 corresponds to the stretching vibration of C -O in primary and secondary hydroxyl groups [29,30]. Figure 5(b) shows the FTIR spectrum of CS-MS.…”

Section: Desorption Experimentsmentioning

confidence: 99%

Microfluidic synthesis of renewable biosorbent with highly comprehensive adsorption performance for copper (II)

Zhu

Bai

Wang

et al. 2017

Front. Chem. Sci. Eng.

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A microsphere biosorbent with uniform size (CV = 1.52%), controllable morphology and component, and high mechanical strength was synthesized from chitosan by microfluidic technology combining with chemical crosslinking and solvent extraction. This chitosan microsphere (CS-MS) was prepared with a two-step solidification process, which was acquired by drying for the enhancement of mechanical property in final. The adsorption behavior of CS-MS towards copper (II) and main influencing factors on adsorption performance were investigated by batch experiments. Kinetic data highlighted dominant chemical bonding along with electrons transferring in adsorption process. Isothermal analysis indicated that adsorption capacity was relevant to the number of active site. All these explorations provided a new direction for preparing highly comprehensive performance sorbent used in heavy metal treatment via microfluidic technology.

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“…Release of large quantities of heavy metals into the natural environment has resulted in a number of environmental problems. Constituting one of the major causes of environmental pollution, chromium, in hexavalent form [Cr (VI)], is one of the most toxic heavy metal and has become a serious health concern [1]. Although some metals are necessary for biological processes, all of them are toxic at high concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…Although some metals are necessary for biological processes, all of them are toxic at high concentrations. This is due to their oxidative capacity to form free radicals and their ability to replace essential metals in enzymes, interrupting their normal activity [1,2]. Non-essential metals are very toxic even at low concentration and can be accumulated in different organisms.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have been reported in this context employing a wide variety of microorganisms like fungi, algae, protozoa, and bacteria. Among the microorganisms, bacteria are better candidate as they can be easily cultured with simple nutrients and ease to handle [1,9,10,11]. Biosorption is a passive process which utilizes the cell wall of biomass to sequester the Cr (VI) ions from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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The Biosorption Features of Cr (VI) Ions by Dried Biomass of a Facultative Anaerobic Bacillus cereus Strain Pf-1

Nguema

Luo

Mounir

et al. 2019

ACRI

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Many studies were undertaken on the biosorption potential of different kinds of biomaterials. However, there is a paucity of data regarding the biosorption mechanism of Cr (VI) using dried cells. In our study, the removal of Cr (VI) from aqueous solution was investigated in a batch system by the dried biomass of a chromium-resistant bacterium isolated from activated sludge samples. Equilibrium and kinetic experiments were undertaken at various initial metal concentration, pH, and biosorbent dosage. Bacillus cereus biomass was characterized using Energy-Dispersive X-ray (EDX), Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). Biosorption process was found to be pH dependent. The optimum pH was found to be 2.0. The Langmuir and Freundlich were considered to identify the isotherm that could better describe the equilibrium adsorption of Cr (VI) onto the biomass. Langmuir and Freundlich models fitted our experimental data. The suitability of the pseudo-first order and pseudo-second order kinetic models for the biosorption of Cr (VI) onto Bacillus cereus was also performed. The mechanism for the adsorption was studied by fitting the kinetic data with the Boyd plot and intra-particle diffusion model. External mass transfer was found to be the rate-determining step. Based on the ionic nature of the metal, the intra-particle diffusion and extent of film diffusion varied.

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The biosorption of Cr(VI) ions by dried biomass obtained from a chromium-resistant bacterium

Cited by 15 publications

References 31 publications

Bioremediation and extracellular synthesis of copper nanoparticles from wastewater using Yarrowia lipolytica AUMC 9256

Bioremediation and extracellular synthesis of copper nanoparticles from wastewater using Yarrowia lipolytica AUMC 9256

Microfluidic synthesis of renewable biosorbent with highly comprehensive adsorption performance for copper (II)

The Biosorption Features of Cr (VI) Ions by Dried Biomass of a Facultative Anaerobic Bacillus cereus Strain Pf-1

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