Sorption of copper by a highly mineralized peat in batch and packed‐bed systems

Izquierdo, Marta; Gabaldón, Carmen; Marzal, Paula; Sempere, Feliu

doi:10.1002/jctb.2279

Cited by 6 publications

(8 citation statements)

References 30 publications

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“…A mass transport model that predicted heavy metal removal in the fixed‐bed biosorption column in the absence of complexing agents has been extended for its application in the presence of EDTA . The model is based on the resolution of the convection‐dispersion equation for one‐dimensional transport in the axial direction with a steady‐state flow: where θ is the bed porosity, C is the solute concentration (mg dm −3 ), accounting for complexed and uncomplexed copper(II) species, ρ is the bulk density of the porous media in the column (g dm −3 ), q represents the adsorbed amount (mg g −1 ), D is the hydrodynamic dispersion coefficient (m 2 s −1 ), and u i is the average pore water velocity (m s −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…For the sorption of copper(II) onto this peat, Langmuir model parameters were determined, resulting in values of q max = 43.29 mg g −1 and b = 5.47 dm 3 mg −1 …”

Section: Resultsmentioning

confidence: 99%

“…This dual system is shown to be a promising treatment for wastewater polluted with heavy metals in the presence of strong complexing agents such as EDTA. It is worth noting that metal retained by both sorbents can be easily eluted using a diluted HCl solution, with a percentage of metal recovery higher than 90% , . Further efforts have to be made to optimise the design of the system in order to achieve maximum profit of the sorption retention capacities of both fixed‐bed reactors.…”

Section: Resultsmentioning

confidence: 99%

“…A mass transport model that predicted heavy metal removal in the fixed-bed biosorption column in the absence of complexing agents has been extended for its application in the presence of EDTA. 29 The model is based on the resolution of the convectiondispersion equation for one-dimensional transport in the axial direction with a steady-state flow: 36…”

Section: Fixed-bed Column Modelling Of Copper(ii) Biosorption In the mentioning

confidence: 99%

“…Chang and Ku used the BDST model to describe the adsorption behaviour of EDTA‐chelated copper(II) onto activated carbon . With the improvement of computer calculation capacity, models based on the complete resolution of the mass balance partial differential equation have been developed . In this case, mass balance must be coupled to kinetic expressions describing the rate limiting step: film diffusion, intraparticle diffusion or reaction kinetics.…”

Section: Introductionmentioning

confidence: 99%

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Interference of EDTA in the treatment of metal plating wastewater by biosorption

Izquierdo

Gabaldón

Marzal

2012

J of Chemical Tech & Biotech

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BACKGROUND: The applicability of biosorption for the treatment of metal plating wastewater is adversely affected by the presence of complexing agents. To investigate this limitation on the removal of copper(II) onto peat, batch and column experiments were carried out using EDTA as the model complexing agent. The influence of pH and copper(II):EDTA mass ratios were evaluated for copper(II) concentrations between 5 and 100 mg Cu(II) dm−3. RESULTS: EDTA negatively affected the copper(II) uptake of peat for pH > 5. Batch and column experiments showed that copper(II)‐EDTA complexes were not sorbed by peat. The leaks of copper(II) detected from the beginning of the column operation matched the copper(II)‐EDTA concentration in the feed solutions. To overcome the interference of EDTA, a novel approach based on the combination of peat + activated carbon was proposed. Nearly complete removal of copper(II) was maintained over 70 h in the treatment of a solution containing 20 mg Cu(II) dm−3 with 11% of copper(II)‐EDTA complexes. CONCLUSION: A new mass transport model coupling copper(II) speciation in the feed and mass transfer rate‐controlled process simulated the copper(II) breakthrough curves in the presence of EDTA and could be used to successfully predict the breakthrough point. This work demonstrated that biosorption can also be applied for the treatment of wastewater containing complexing agents with the proper combination of sorbent materials. © 2012 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

“…For the sorption of copper(II) onto this peat, Langmuir model parameters were determined, resulting in values of q max = 43.29 mg g −1 and b = 5.47 dm 3 mg −1 …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Fixed-bed Column Modelling Of Copper(ii) Biosorption In the mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interference of EDTA in the treatment of metal plating wastewater by biosorption

Izquierdo

Gabaldón

Marzal

2012

J of Chemical Tech & Biotech

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Study of the Interaction Mechanism in the Biosorption of Copper(II) Ions onto Posidonia oceanica and Peat

Izquierdo

Marzal

Gabaldón

et al. 2012

CLEAN Soil Air Water

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A systematic approach was used to characterize the biosorption of copper(II) onto two biosorbents, Posidonia oceanica and peat, focusing on the interaction mechanisms, the copper(II) sorption–desorption process and the thermal behavior of the biosorbents. Sorption isotherms at pH 4–6 were obtained and the experimental data were fitted to the Langmuir model with a maximum uptake (qmax) at pH 6 of 85.78 and 49.69 mg g−1, for P. oceanica and peat, respectively. A sequential desorption (SD) with water, Ca(NO3)2, and EDTA was applied to copper‐saturated biosorbents. Around 65–70% copper(II) were desorbed with EDTA, indicating that this heavy metal was strongly bound. The reversibility of copper(II) sorption was obtained by desorption with HCl and SD. Fourier transform IR spectroscopy (FTIR) analysis detected the presence of peaks associated with OH groups in aromatic and aliphatic structures, CH, CH2, and CH3 in aliphatic structures, COO− and COOH groups and unsaturated aromatic structures on the surface of both biosorbents, as well as peaks corresponding to SiO groups on the surface of peat. The results of SEM‐EDX and FTIR analysis of copper‐saturated samples demonstrated that ion exchange was one of the mechanisms involved in copper(II) retention. Thermal analysis of biosorbent samples showed that copper(II) sorption–desorption processes affected the thermal stability of the biosorbents.

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Sorption of polycyclic aromatic hydrocarbons from aqueous solution by hexadecyltrimethylammonium bromide modified fibric peat

Tang

Zhou

et al. 2010

J of Chemical Tech & Biotech

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BACKGROUND: Fibric peat was modified by hexadecyltrimethylammonium bromide (HTAB) to improve its performance in sorption of polycyclic aromatic hydrocarbons (PAHs). The raw fibric peat (P-R) and surfactant modified peat (P-HTAB) were characterized by capillary rise test to determine the effect of HTAB on surface hydrophobicity. Effect of contact time was also investigated. Batch sorption data were fitted to the Freundlich model and pseudo-second-order model for isotherm and kinetics study.

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Sorption of copper by a highly mineralized peat in batch and packed‐bed systems

Cited by 6 publications

References 30 publications

Interference of EDTA in the treatment of metal plating wastewater by biosorption

Interference of EDTA in the treatment of metal plating wastewater by biosorption

Study of the Interaction Mechanism in the Biosorption of Copper(II) Ions onto Posidonia oceanica and Peat

Sorption of polycyclic aromatic hydrocarbons from aqueous solution by hexadecyltrimethylammonium bromide modified fibric peat

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