Remediation of BTEX plume in a continuous flow model using zeolite-PRB

Vaezihir, Abdorreza; Bayanlou, Mohammad Bagher; Ahmadnezhad, Zeinab; Barzegari, Ghodrat

doi:10.1016/j.jconhyd.2020.103604

Cited by 19 publications

(7 citation statements)

References 41 publications

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“…Based on the aforementioned, it is evident that the minimization of BTEX emissions and remediation of already contaminated matrices play a critical role in human and environmental health. Over the years a series of studies, including advanced oxidation technologies, photocatalysis, sonolysis, radiolysis etc., have been conducted to improve BTEX removal efficiencies (Yerushalmi et al 1999 ; Mascolo et al 2008 ; Braeutigam et al 2009 ; Saponaro et al 2009 ; Laokiat et al 2012 ; Lee et al 2013 ; Caetano et al 2016 ; Al-Sabahi et al 2017 ; Lin et al 2017 ; Dhivakar and Vel rajan 2018 ; Mohan et al 2020 , Vaezihir et al 2020 ). However, still the most popular technique is bioremediation, especially when it is applied in situ, because it is the most cost-effective means of removing many contaminants including BTEX (Cunningham et al 2001 ; Rifai 2005 ; Singh et al 2017 ; Lee et al 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Potential of Variovorax paradoxus isolate BFB1_13 for bioremediation of BTEX contaminated sites

et al. 2021

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Here, we report and discuss the applicability of Variovorax paradoxus strain BFB1_13 in the bioremediation of BTEX contaminated sites. Strain BFB1_13 was capable of degrading all the six BTEX-compounds under both aerobic (O2 conc. 8 mg l−1) and micro-aerobic/oxygen-limited (O2 conc. 0.5 mg l−1) conditions using either individual (8 mg‧l−1) or a mixture of compounds (~ 1.3 mg‧l−1 of each BTEX compound). The BTEX biodegradation capability of SBP-encapsulated cultures (SBP—Small Bioreactor Platform) was also assessed. The fastest degradation rate was observed in the case of aerobic benzene biodegradation (8 mg l−1 per 90 h). Complete biodegradation of other BTEX occurred after at least 168 h of incubation, irrespective of the oxygenation and encapsulation. No statistically significant difference was observed between aerobic and microaerobic BTEX biodegradation. Genes involved in BTEX biodegradation were annotated and degradation pathways were predicted based on whole-genome shotgun sequencing and metabolic analysis. We conclude that V. paradoxus strain BFB1_13 could be used for the development of reactive biobarriers for the containment and in situ decontamination of BTEX contaminated groundwater plumes. Our results suggest that V. paradoxus strain BFB1_13—alone or in co-culture with other BTEX degrading bacterial isolates—can be a new and efficient commercial bioremediation agent for BTEX contaminated sites.

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Section: Introductionmentioning

confidence: 99%

Potential of Variovorax paradoxus isolate BFB1_13 for bioremediation of BTEX contaminated sites

et al. 2021

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“…As can be seen no organic related compound was found fortunately in both water samples. This could be attributed to a phenomenon called self-puri cation and attenuation of water that progressively eliminates the additional organic contamination loaded due to any reason and leads the aquatic ecosystems to recover almost its original balance with the surrounding environment over the years (Vaezihir et al 2020;Oliva González et al 2014).…”

Section: Watermentioning

confidence: 99%

Investigation of long-term hazards of chemical weapon agents in the environment of Sardasht area, Iran

Vaezihir

Pirkhezranian

Sehati

et al. 2021

Environ Sci Pollut Res

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The present study aimed to was to investigate the persistence and existence of chemical warfare agents (CWAs) and related dissipation products in the environment. The study area is Sardasht district located in the western borderline of Iran and Iraq in which was subjected to attack with chemical weapons in July 1987 during the Iran-Iraq war. Three types of environmental samples including water, soil and native local plant materials were collected and analyzed. Gas chromatography-mass spectrometry in the electron impact ionization mode has been developed for the separation, screening, identi cation and quali cation of chemicals after the sample preparation methods. In order to validate the applied extraction procedures, ethylene glycol was spiked to some of the samples including groundwater, surface soil, grape and alfalfa plants. All the recoveries were in the range of 83.6-107.4% with the relative standard deviations varying from 4.9-12.4% (n = 3) successfully. The initial results revealed that no trace of related compounds or CWAs was detected in the soil and water samples. However, trace amounts of some degradation products of blistering agents like Mustard gas (HD) and Lewisite were found in a tree wood from a house subjected to chemical attack as well as in barley samples (a mixture of leaves and root) collected from an agricultural eld in the area indicating chronic low exposure to the environment and people.

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“…These results suggested that filters containing the ZSM-5 and 13X, placed in succession, can constitute an efficient adsorption system suitable for the in situ abatement of contaminants in groundwater, such as in the Permeable Reactive Barriers system (PRB). This water remediation technology is often preferred with respect to thermal desorption, groundwater pump-and-treat systems, biodegradation, chemical oxidation, and reduction because of the significant technical and economic advantages, as well as low impacts on the environment [54][55][56][57][58][59][60][61][62][63][64][65][66][67]. With respect to other remediation technologies, the PRB option represents the optimum solution in longevity and cost and does not suffer from back diffusion and rebound issues [68][69][70][71].…”

Section: Structural and Thermal Characterizationmentioning

confidence: 99%

Evaluation for the Removal Efficiency of VOCs and Heavy Metals by Zeolites-Based Materials in the Wastewater: A Case Study in the Tito Scalo Industrial Area

et al. 2020

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The current study was designed to demonstrate the efficiency of selected zeolites in the immobilization of heavy metals and volatile organic compounds from water in the industrial area of Tito Scalo (Basilicata Region in Southern Italy). The efficiency of zeolite materials has been evaluated by analyzing real water samples, by a multi-technique approach. Gas chromatography (GC) and inductively coupled plasma optical emission spectrometry (ICP-OES) were selected for the detection of volatile organic compounds (VOCs) and heavy metals respectively, and then by thermal analysis (TG, DTA) and X-ray powder diffraction (XRD) to verify the presence of contaminants in the structural channels of the adsorbents. ZSM-5 zeolite (MFI topology) was suitable for volatile organic compounds, showing removal efficiencies 87%. 13X (FAU topology) was more selective for in situ abatements of heavy metals, with efficiencies up to 100%. After VOCs and heavy metals removal, structure refinements of loaded zeolites highlighted variations of both lattice parameters and extraframework content confirming the pollutants immobilization in the framework microporosities. The occurrence of these species was also confirmed by DTA curves showing different phenomena explained on the basis of the nature and number of extraframework species hosted in the zeolite micropores.

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Remediation of BTEX plume in a continuous flow model using zeolite-PRB

Cited by 19 publications

References 41 publications

Potential of Variovorax paradoxus isolate BFB1_13 for bioremediation of BTEX contaminated sites

Potential of Variovorax paradoxus isolate BFB1_13 for bioremediation of BTEX contaminated sites

Investigation of long-term hazards of chemical weapon agents in the environment of Sardasht area, Iran

Evaluation for the Removal Efficiency of VOCs and Heavy Metals by Zeolites-Based Materials in the Wastewater: A Case Study in the Tito Scalo Industrial Area

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