A procedure to design a Permeable Adsorptive Barrier (PAB) for contaminated groundwater remediation

Erto, Alessandro; Lancia, A.; Bortone, I.; Nardo, Armando Di; Natale, Michele Di; Musmarra, Dino

doi:10.1016/j.jenvman.2010.07.044

Cited by 37 publications

(23 citation statements)

References 19 publications

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“…In these conditions, the adsorption of the investigated aromatic compounds is likely to occur according to a monolayer coverage; hence, the Langmuir model can be chosen for experimental data description. This choice is confirmed by several studies dealing with similar experimental conditions and available in the pertinent literature [28,34,42,43]. Moreover, as reported in the following, for the interpretation and prediction of binary systems adsorption data, the Langmuir model (in its multicomponent formulation [21,35]) can be proficiently adopted.…”

Section: Resultsmentioning

confidence: 71%

“…The wide application of the adsorption process is also due to the possibility of using different kinds of adsorbents, including natural materials [23,24], waste materials [25] or by-products [26,27]. In addition, the removal of pollutants from contaminated groundwater by adsorption can be pursued either by an ex situ technology (i.e., pump and treat) or by in situ technology (i.e., permeable adsorptive barrier (PAB)) [28][29][30]. In the latter case, different PAB configurations can be adopted, according to the nature of the aquifer, its contamination level and the properties of the pollutants present [28,[31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Remediation of Groundwater Polluted by Aromatic Compounds by Means of Adsorption

Canzano

Capasso

Natale³

et al. 2014

Sustainability

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Abstract:In this work, an experimental and modeling analysis of the adsorption of four aromatic compounds (i.e., toluene, naphthalene, o-xylene and ethylbenzene) onto a commercial activated carbon is carried out. The aim is to assess the suitability of the adsorption process for the treatment of polluted groundwater, also when a multiple contamination is detected. Batch adsorption tests from simulated polluted groundwater are performed in single-compound systems and in two binary systems (i.e., toluene + naphthalene and o-xylene + ethylbenzene), at constant temperature (20 °C) and pH (7). Experimental results in single-compound systems reveal that all of the analytes are significantly adsorbed on the tested activated carbon. In particular, toluene and naphthalene adsorption capacities are the highest and of similar value, while for o-xylene and ethylbenzene, the performances are lower. The adsorption of these compounds seems to be influenced by a combined effect of several parameters, such as hydrophobicity, molecule size, structure of the molecule, etc. Experimental results in binary systems show a different behavior of the two systems, which confirms their complexity and explains the interest in these complex adsorption systems. In particular, toluene and naphthalene are mutually competitive, while in the case of OPEN ACCESSSustainability 2014, 6 4808 o-xylene + ethylbenzene, only the former undergoes competitive effects. The analysis of the entire experimental data set is integrated with a dedicated modeling analysis using the extended Langmuir model. For both single-compound and binary systems, this model provides acceptable results, in particular for low equilibrium concentrations, like those more commonly found in groundwater, and for the compounds involved in adsorptive competitive effects.

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Section: Resultsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Remediation of Groundwater Polluted by Aromatic Compounds by Means of Adsorption

Canzano

Capasso

Natale³

et al. 2014

Sustainability

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“…1. The layer materials applied were proven to be effective in leachate pollutants removal based on the reports (Erto et al, 2011;Lee et al, 2010;Yousuf et al, 1995), and the performance of the combined layers in FLEL were tested here.…”

Section: Setting Up Reactors and Waste Compositionsmentioning

confidence: 99%

Effect of layers composition on leachate property from functional layer embedded landfill

Liu

Feng

Zhong³

et al. 2011

Bioresource Technology

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“…However, a very promising and innovative application of PRB makes use of an adsorbent material (e.g. activated carbon) as built material and it is commonly referred as permeable adsorptive barrier (PAB) [30]. Since adsorption process is currently adopted in the capture of benzene, the application of this process within PRB is expected to be very effective for the remediation of an aquifer contaminated by this hazardous compound.…”

Section: Introductionmentioning

confidence: 99%

“…A design procedure, formerly developed by the authors in a recent work [30], was implemented in COMSOL Multi-physics environment using a finite element model. A benzene-contaminated aquifer situated in North Naples (Italy), lately hit the headlines as "Gomorra's land", was taken as case study and A. donax-based activated carbon was considered as barrier built material [22].…”

Section: Introductionmentioning

confidence: 99%

Design of Permeable Adsorptive Barriers (PABs) for groundwater remediation by COMSOL Multi-physics simulations

Bortone¹,

Erto

Santonastaso³

et al. 2014

Desalination and Water Treatment

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A B S T R A C TThis work deals with an innovative approach to design a permeable reactive barrier (PRB) filled with activated carbon, namely a permeable adsorptive barrier (PAB). A 2D numerical model, solved using a finite element approach via COMSOL Multi-physics, was used to describe the pollutant transport within groundwater and the pollutant adsorption onto the barrier. The PAB design procedure was applied to a benzene-contaminated aquifer situated in the metropolitan area of North Naples (Italy), lately hit the headlines as "Gomorra's land". Model results showed that PAB is an effective tool for the remediation of the aquifer under analysis, since the pollutant concentration downstream the barrier resulted everywhere lower than the regulatory limit set for groundwater. A sensitivity analysis was carried out to evaluate the influence of some site parameters on the PAB design, i.e. hydraulic conductivity and dispersivity. Finally, the simulation results allow estimating the long-term efficiency of the treatment system and the time required to achieve a complete restoration of the aquifer.

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A procedure to design a Permeable Adsorptive Barrier (PAB) for contaminated groundwater remediation

Cited by 37 publications

References 19 publications

Remediation of Groundwater Polluted by Aromatic Compounds by Means of Adsorption

Remediation of Groundwater Polluted by Aromatic Compounds by Means of Adsorption

Effect of layers composition on leachate property from functional layer embedded landfill

Design of Permeable Adsorptive Barriers (PABs) for groundwater remediation by COMSOL Multi-physics simulations

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