Feasibility study on an oxidant-injected permeable reactive barrier to treat BTEX contamination: Adsorptive and catalytic characteristics of waste-reclaimed adsorbent

Do, Si-Hyun; Kwon, Yong-Jae; Kong, Sung-Ho

doi:10.1016/j.jhazmat.2011.03.115

Cited by 25 publications

(7 citation statements)

References 40 publications

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“…Industrial and agricultural developments cause not only production of new products but also more usage and emission of harmful chemicals as well as noxious gas. − As it is well known, volatile organic compounds (VOCs) have a bad health effect on mankind. , As typical VOCs, which would harm human health, benzene, toluene, ethylbenzene, and xylene (BTEX) are always distributed in the human living environment at low concentrations. − Thus, several gas sensors, such as semiconductor sensors and quartz crystal microbalance (QCM) transducers, have been developed to detect BTEX and avoid or reduce their harmful effects on human health. − QCM is used as a transducer for detecting different gases via coating various materials . Although these BTEX sensors possess good sensing ability, most of them have not focused on eliminating the interference of water, which can badly weaken the selectivity of gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Polymerized n-Octadecylsilane Surface for BTEX Sensing and Stable Toluene/Water Selective Detection Based on QCM Sensor

Wang

Cha

et al. 2018

ACS Omega

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The present study reports a facile and low-cost route to produce a superhydrophobic polymerized n -octadecylsilane surface with micronano hierarchical structure on the surface of quartz crystal microbalance (QCM). The surface is used as a novel functional sensing material to detect benzene, toluene, ethylbenzene, and xylene (BTEX) vapor on the basis of QCM platform. The composites were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and contact angle measurements. The type of solvent used to dissolve N -octadecyltrichlorosilane has a big impact on the morphology, wettability, and sensing performance of the polymer material. Further systematic studies suggest that surface wettability (contact angle) and molecular polarity of the detected analytes are effective factors in selective detection toward BTEX using resonator-type gas sensors. Gas sensing results toward toluene in different relative humidities show that the new-style sensor has stable toluene/water selective detection performance and that the disturbance of water is negligible. Besides, the limit of detection toward toluene of the sensor is lower than the odor threshold value.

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Section: Introductionmentioning

confidence: 99%

Superhydrophobic Polymerized n-Octadecylsilane Surface for BTEX Sensing and Stable Toluene/Water Selective Detection Based on QCM Sensor

Wang

Cha

et al. 2018

ACS Omega

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“…Accordingly, such pollution prompts the need for investigations of the available technology for the control and remediation of BTEX contaminants. In recent years, the application of activated persulfate (PS) oxidation has emerged as a novel effective technology for the remediation of BTEX-contaminated air, soil, and water. − This technology could generate sulfate radicals (SO 4 •– ) as described in eq . SO 4 •– can react as a strong oxidant for organic compounds in aqueous systems in three different ways: electron transfer, addition, and hydrogen abstraction. , Sodium persulfate (Na 2 S 2 O 8 ) is normally selected as an oxidant for in situ chemical oxidation (ISCO) because potassium persulfate (K 2 S 2 O 8 ) has a low water solubility and ammonium persulfate ((NH 4 ) 2 S 2 O 8 ) is relatively volatile .…”

Section: Introductionmentioning

confidence: 99%

Degradation of Toluene by a Selective Ferrous Ion Activated Persulfate Oxidation Process

Long

Yang

Zhang

2014

Ind. Eng. Chem. Res.

122

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The Fe 2+ -activated persulfate (PS) oxidation of toluene was evaluated using single-factor tests and response surface methodology (RSM). The results indicated the degradation efficiency increased as the PS and Fe 2+ concentrations increased, while excessive dosages inhibited the degradation efficiency. The pH had an insignificant effect on the degradation of toluene. Based on the RSM optimization approach, the degradation efficiency reached a maximum of 84.4%. The main intermediates were also separated and identified by GC−MS, and a plausible degradation pathway of toluene was proposed. Further studies of surfactant recovery from flushing effluents mixed with toluene and surfactant were explored. Compared with the Fe 2+ /H 2 O 2 process, a great enhancement of the toluene degradation efficiency and lower sodium dodecyl sulfate (SDS) degradation efficiency were obtained by the Fe 2+ /PS process. The results demonstrated that the Fe 2+ /PS selective oxidation process could be used for SDS recovery and for the degradation of contaminants present in soil flushing effluents.

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“…With regard to groundwater and soil, a convenient and practical method needs to be proposed for the treatment of contaminated groundwater and soil. Permeable reactive barriers (PRBs) with zerovalent iron (ZVI) or mineral fillers installed underground were used to eliminate contamination in situ. , Furthermore, some indigenous microorganisms can form in the PRBs to accelerate contaminant attenuation …”

Section: Introductionmentioning

confidence: 99%

Microbe–Mineral Interaction-Induced Microorganism-Augmented Permeable Reactive Barriers for Remediation of Contaminated Soil and Groundwater: A Review

et al. 2023

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Conventional zerovalent iron permeable reactive barriers (PRBs) are limited by unknown iron corrosion kinetics and permeability loss, hindering access to desirable remediation targets. Against this background, microbe−mineral interactioninduced microorganism-augmented PRBs (Bio-PRBs) are considered a promising cutting-edge technology for increasing reaction rate k and enhancing removal efficiency η. This study provides original insights into the various active media and microbial carriers and the mechanisms of interaction among microorganisms, active media, and various contaminants. The results showed that microorganism-activated and microorganism-immobilized Bio-PRBs increased k and η by 40−2650% and 25−400%, respectively. In Bio-PRBs, the removal of contaminants involves the coupling of biodegradation, chemical reduction, and adsorption processes. Microorganisms promote the liquefaction of metal minerals into metal ions, thus forming a positive cycle by "microbe−mineral" interaction. Moreover, nonmetallic fillers affect k through synergistic effects of biodegradation, biological reduction, and electron donor groups. Microorganisms accelerate the e − transfer to promote the contaminants' transformation, and nonmetallic fillers are also conducive to improving diversity and abundance. Furthermore, some suggestions are made regarding the development and application of Bio-PRBs. Bio-PRBs provide efficient and novel approaches and strategies for eliminating soil and groundwater contamination based on microbe−mineral interaction and stimulation.

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Feasibility study on an oxidant-injected permeable reactive barrier to treat BTEX contamination: Adsorptive and catalytic characteristics of waste-reclaimed adsorbent

Cited by 25 publications

References 40 publications

Superhydrophobic Polymerized n-Octadecylsilane Surface for BTEX Sensing and Stable Toluene/Water Selective Detection Based on QCM Sensor

Superhydrophobic Polymerized n-Octadecylsilane Surface for BTEX Sensing and Stable Toluene/Water Selective Detection Based on QCM Sensor

Degradation of Toluene by a Selective Ferrous Ion Activated Persulfate Oxidation Process

Microbe–Mineral Interaction-Induced Microorganism-Augmented Permeable Reactive Barriers for Remediation of Contaminated Soil and Groundwater: A Review

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