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bioremediation kinetic models for removal of zn and co

20 bioremediation kinetic models for removal of zn and co

20 bioremediation kinetic models for removal of zn and co Algae as a green technology for heavy metals Urbanization, industrialization, and natural earth processes have potentially increased the contamination of heavy metals (HMs) in water bodies.

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Studies on bioremediation of Zn and acid waters using

Aug 01, 2018Zn(II) specific removal increases along with initial metal concentration. The net adsorption capacity was determined, and the Freundlich, Langmuir and Hill models were applied. The stoichiometric relationship between H + release and zinc uptake in slightly acidic conditions is 1:1, and the adsorption kinetics follows a pseudo-second order model

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Spirulina platensis as a model object for the environment

Jan 01, 2020Spirulina platensis is an intensely studied biological object due to its valuable biotechnological qualities.Spirulina biomass is used for direct human and animal consumption as well as raw material for production of drugs and supplements. Therefore, its use for environment remediation is unjustified. Instead, this cyanobacteria is a very suitable object to

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Author: Liliana Cepoi, Inga Zinicovscaia

(PDF) Bioremediation techniques and strategies on removal

Adsorption kinetics are fitted to a pseudo-second-order kinetic model. Experimental results indicate that the Moroccan diatomite could be used as a potential adsorbent for the removal

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Bioremediation of cadmium- and zinc-contaminated soil

However, when the soils were contaminated with very high levels of Cd and Zn (Cd 54.97-65.33 mg kg-1; Zn 813.4-964.8 mg kg-1), bioremediation effects were not clear.

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Multimetal bioremediation and biomining by a combination

Jul 16, 2019We demonstrated the high efficiency of metal removal and enrichment by mixed fungal dead cell walls by applying a metal mix of Al, Cd, Co, Cu, Cr, Ni, Pb, Zn

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Bioremediation of Cadmium by Growing Rhodobacter

Sep 01, 2020A pseudo-second-order kinetic model fits the removal process well (R² = 0.9508–0.9913). Co²⁺ removal efficiency was not significantly influenced by

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(PDF) Bioremediation of Waste Water to Remove Heavy Metals

highest removal efficiencies for the other analysed heavy metals (Fe(III), Ni, Co, Fe(II), Zn, Al and Cu) were achieved at pH values of approximately 7. Water 2019,11,454 13 of 15

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Inhibition effect of zinc, cadmium, and nickel ions in

Microalgae bioremediation of wastewater with heavy metal (single and ternary metals systems). • Microalgae was able to remove nitrogen and phosphorus, as well as heavy metals. • Kinetic and equilibrium models were determined with good fitting performance. • Highest inhibition effect was determined for nickel.

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Cr(VI) adsorption from aqueous solution by fungal

Dec 01, 2019Maximum Cr(VI) uptake (99%) indicated that pH 2.0 is the optimal for Cr(VI) removal. Linear and non-linear kinetic models were evaluated. The best fitting for linear kinetics was the pseudo-second order linear equation and the Elovich model in its non-linear form, suggesting chemisorption as the controlling step of adsorption.

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Inhibition effect of zinc, cadmium, and nickel ions in

Microalgae bioremediation of wastewater with heavy metal (single and ternary metals systems). • Microalgae was able to remove nitrogen and phosphorus, as well as heavy metals. • Kinetic and equilibrium models were determined with good fitting performance. • Highest inhibition effect was determined for nickel.

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In situ electrochemical synthesis of Zn-Al layered double

Sep 16, 2020In situ electrochemical synthesis of Zn-Al layered double hydroxides (LDHs) was adopted to remove strontium in the simulated liquid radioactive waste

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Cr(VI) adsorption from aqueous solution by fungal

Dec 01, 2019Maximum Cr(VI) uptake (99%) indicated that pH 2.0 is the optimal for Cr(VI) removal. Linear and non-linear kinetic models were evaluated. The best fitting for linear kinetics was the pseudo-second order linear equation and the Elovich model in its non-linear form, suggesting chemisorption as the controlling step of adsorption.

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Multimetal bioremediation and biomining by a combination

Jul 16, 2019We demonstrated the high efficiency of metal removal and enrichment by mixed fungal dead cell walls by applying a metal mix of Al, Cd, Co, Cu, Cr, Ni, Pb, Zn

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Potential of Penicillium Species in the Bioremediation Field

The COD concentrations of reactors of untreated and treated vinasses were fed with 80.5 g/L and 23.0 g/L, respectively. The results obtained in the case of treated vinasses for kinetic constants, maximum specific growth rate and the model kinetic constant for methane production, were 9.6 and 6.9 times higher than those of untreated vinasses.

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(PDF) Adsorption kinetics and intraparticulate

removal of Cd, Pb and Zn ions from waste wa ter. Phys. Sci. 2: 83-94. Igwe JC, Abia AA (2005) Sorption kinetics and intraparticulate diffusivities of Cd, P b and Zn ions on maize cob.

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The Sequential Application of Macroalgal Biosorbents for

A model was developed using data from a previous study with Tarong ADW () to predict the change in concentration of 21 elements after the deployment of each biosorbent.Most metal and metalloid sorption occurs within the first hour of exposure and the most effective sorption occurs when the pH of the ADW is un-manipulated (pH ∼7.1) .The biosorption data collected under

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Biosorption of Pb2+ and Zn2+ by Non-Living Biomass of

Jan 26, 2011Removal of heavy metals (Pb 2+, Zn 2+) from aqueous solution by dried biomass of Spirulina sp. was investigated. Spirulina rapidly adsorbed appreciable amount of lead and zinc from the aqueous solutions within 15 min of initial contact with the metal solution and exhibited high sequestration of lead and zinc at low equilibrium concentrations. The specific adsorption of both Pb 2+ and Zn

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link.springer

Release kinetics governs the detachment and migration of potentially toxic trace elements (PTEs) over time between the solid phase and soil solutions. The assessment of PTEs’ release behavior through time supports more accurate prediction models of toxicity in highly polluted soils. Recently, biochar, a charcoal black carbon ameliorant, was extensively applied for decreasing

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Characterization of Cd-, Pb-, Zn-resistant endophytic

Sep 24, 2013The aim of this study was to characterize the features of a Cd-, Pb-, and Zn-resistant endophytic fungus Lasiodiplodia sp. MXSF31 and to investigate the potential of MXSF31 to remove metals from contaminated water and soils. The endophytic fungus was isolated from the stem of Portulaca oleracea growing in metal-contaminated soils. The maximum biosorption

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Removal of cadmium and zinc from contaminated wastewater

The removal rates of Cd and Zn increased with increasing time, and the maximum removal rate can generally be obtained at 120 h. However, the maximum removal rate for Cd-treated groups ( Figure 3(a) ) at low initial concentration (5 or 10 mg L −1 ) was obtained at 72 h of treatment.

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Bioremediation of Heavy Metals IntechOpen

Mar 06, 2019Exposure to lead (Pb), zinc (Zn), cadmium (Cd), copper (Cu), and selenite (SeO3−2) consider the main heavy metals that threat human health. These heavy metals can interfere with the function of vital cellular components. Soil heavy metal contamination represents risks to humans and the ecosystem through drinking of contaminated groundwater, direct

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Physical, Chemical and Phytoremediation Technique for

The order of metal ion adsorption at pH 6.5 by PVP- Phytic acid complex was Ni 2+ >Zn 2+ >Cu 2+ >Co 2+ > Cd 2+ >Pb 2+ (Tsao et al. 1997). According to International Union of Pure and Applied Chemistry (IUPAC), potentiometry and multinuclear NMR have been the main instrumental techniques used for the determination of stability constants of such

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A Review on In Vitro and In Vivo Bioremediation Potential

In L. plantarum Cd 2+ removal was inhibited by Mn 2+ but not by Zn 2+, Cu 2+, Co 2+ etc. The high concentration of Mn 2+ in L. plantarum helps to reduce toxicity of superoxide radical ions by scavenging them (Archibald and Fridovich, 1981a and b, Archibald and Fridovich, 1982a and b).

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Characterization of Cd-, Pb-, Zn-resistant endophytic

Sep 24, 2013The aim of this study was to characterize the features of a Cd-, Pb-, and Zn-resistant endophytic fungus Lasiodiplodia sp. MXSF31 and to investigate the potential of MXSF31 to remove metals from contaminated water and soils. The endophytic fungus was isolated from the stem of Portulaca oleracea growing in metal-contaminated soils. The maximum biosorption

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Potential of Penicillium Species in the Bioremediation Field

The COD concentrations of reactors of untreated and treated vinasses were fed with 80.5 g/L and 23.0 g/L, respectively. The results obtained in the case of treated vinasses for kinetic constants, maximum specific growth rate and the model kinetic constant for methane production, were 9.6 and 6.9 times higher than those of untreated vinasses.

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Kinetic modeling and half life study on bioremediation of

Kinetic modeling and half life study on bioremediation of crude oil dispersed by Corexit 9500 Under abiotic conditions, oil removal was 19.9% while a maximum of 31.8% total petroleum hydrocarbons (TPH) removal was obtained in natural attenuation experiment. All DCO bioreactors demonstrated higher and faster removal than CO bioreactors. Half

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Removal of cadmium and zinc from contaminated wastewater

The removal rates of Cd and Zn increased with increasing time, and the maximum removal rate can generally be obtained at 120 h. However, the maximum removal rate for Cd-treated groups ( Figure 3(a) ) at low initial concentration (5 or 10 mg L −1 ) was obtained at 72 h of treatment.

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A Review on In Vitro and In Vivo Bioremediation Potential

In L. plantarum Cd 2+ removal was inhibited by Mn 2+ but not by Zn 2+, Cu 2+, Co 2+ etc. The high concentration of Mn 2+ in L. plantarum helps to reduce toxicity of superoxide radical ions by scavenging them (Archibald and Fridovich, 1981a and b, Archibald and Fridovich, 1982a and b).

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Biosorption of Zn 2+,Ni 2+ and Co 2+ from water samples

According to the correlation coefficients, the kinetic models reveal that the pseudo-second order with its high correlation coefficients (Zn 2+: 0.9977, Ni 2+: 0.9989 and Co 2+: 0.9998) and lower χ 2 values (Zn 2+: 0.0063, Ni 2+: 0.0112 and Co 2+: 0.0235) has a better ability to represent the fitting model for the kinetics of Zn 2+, Ni 2+ and

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Biosorption of Cu(II), Pb(II) and Zn(II) Ions from Aqueous

The efficacy of coconut tree sawdust (CTS), eggshell (ES) and sugarcane bagasse (SB) as alternative low-cost biosorbents for the removal of Cu(II), Pb(II) and Zn(II) ions from aqueous solutions was investigated. Batch adsorption studies were carried out to evaluate the effects of solution pH and initial metal concentration on adsorption capacity.

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Bioremediation of Heavy Metals by Microbes SpringerLink

Bioremediation of these heavy metals like As, Cd, Cr, Hg, Ni, Hg, and Zn can be done by either plants or microorganisms or by the combination of two. In this chapter emphasis has been given to its microbial methods.

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Application of Iron Oxide Nanomaterials for the Removal of

In the 21st century water polluted by heavy metal is one of the environment problems. Various methods for removal of the heavy metal ions from the water have extensively been studied. Application of iron oxide nanaparticles based nanomaterials for removal of heavy metals is well-known adsorbents for remediation of water. Due to its important physiochemical property,

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Modelling growth of, and removal of Zn and Hg by a wild

Jan 11, 2012The maximum amount of Zn 2+ removed was 21.3 mg/L, upon exposure to 25 mg/L for 6 day, whereas the maximum removal of Hg 2+ was 335 μg/L, upon 6 day in the presence of 350 μg/L. The aforementioned mechanistic model was built upon Monod assumptions (including heavy metal inhibition), coupled with Leudeking–Piret relationships

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Bioremediation of Waters Contaminated with Heavy Metals

Comparing the Langmuir and Freundlich models, M. oleifera seeds demonstrated a good removal capacity for Co(II), Cu(II), Pb(II), Cd(II) and Ag(I), as compared to reports related to other parts of the plant (Table 3). The variations in the removal percentage for metal ions can be explained by the different ionic radii of chemical species.

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Application of Biosorption for Removal of Heavy Metals

Dec 04, 2017Several metals (Ni, Co, Cu, Zn) were removed (98%) with 20 min residence time and 40–50BV of solution at low temperatures of water (1–3°C) or air (<=0°C). The metals were precipitated by treating the elute with MgO and evaporating to obtain residue. Employing a similar setup, 90–95% of removal was obtained for Zn, Fe, and Mn.

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Bioremediation Options for Heavy Metal Pollution Journal

Bacterial species have adapted and developed mechanisms for metals ions resistance and remediation for their survival.104 Heavy metal ions bioremediation by bacterial agents has been widely researched.105–109 Bacterial biomass accomplishes the rapid removal of metals such as Cu, Zn, Pb, Cd, and Cr.110 biosorption efficiency depends on heavy

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Fungus An alternative for bioremediation of heavy metal

The adsorption isotherm models of Langmuir, Freundlich, Brunauer Emmett Teller (BET) and Scatchard have been used to describe the biosorption equilibria (Table 1) Langmuir model can be described as: q = Q o b C f / 1 + b C f where q is the uptake of metal per unit weight of the adsorbent, Qo is the maximum uptake, b is the

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