Simulataneous pentachlorophenol decomposition and granular activated carbon regeneration assisted by dielectric barrier discharge plasma

Qu, Guangzhou; Lü, Na; Li, Jie; Wu, Yan; Li, Guofeng; Duan, Li

doi:10.1016/j.jhazmat.2009.07.035

Cited by 64 publications

(27 citation statements)

References 51 publications

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“…During the last years, the non-thermal plasma discharge (NTP) has been considered as a well-promising advanced oxidation process (AOP) and is used as an energetically efficient method of wastewater treatment (Locke et al 2006;Hao et al 2007;Zhang et al 2008;Ognier et al 2009;Qu et al 2009). Additionally, NTP has extensively been studied for the treatment of polluted gases and has been used successfully for the removal of various hydrocarbon pollutants such as aliphatics, aromatic compounds, aromatic polycyclic compounds and halogenated solvents (Masuda 1988;Mok et al 2002;Kim 2003;Lee et al 2004;Kim et al 2005;Bai et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Non-aqueous phase liquid-contaminated soil remediation by ex situ dielectric barrier discharge plasma

Aggelopoulos

Tsakiroglou

Ognier

et al. 2014

Int. J. Environ. Sci. Technol.

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Non-thermal dielectric barrier discharge plasma is examined as a method for the ex situ remediation of non-aqueous phase liquid (NAPL)-contaminated soils. A mixture of equal mass concentrations (w/w) of n-decane, ndodecane and n-hexadecane was used as model NAPL. Two soil types differing with respect to the degree of micro-heterogeneity were artificially polluted by NAPL: a homogeneous silicate sand and a moderately heterogeneous loamy sand. The effect of soil heterogeneity, NAPL concentration and energy density on soil remediation efficiency was investigated by treating NAPL-polluted samples for various treatment times and three NAPL concentrations. The concentration and composition of the residual NAPL in soil were determined with NAPL extraction in dichloromethane and GC-FID analysis, while new oxidized products were identified with attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR). The experimental results indicated that the overall NAPL removal efficiency increases rapidly in early times reaching a plateau at late times, where NAPL is removed almost completely. The overall NAPL removal efficiency decreases with its concentration increasing and soil heterogeneity strengthening. The removal efficiency of each NAPL compound is inversely proportional to the number of carbon atoms and consistent with alkane volatility. A potential NAPL degradation mechanism is suggested by accounting for intermediates and final products as quantified by GC-FID and identified by ATR-FTIR.

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Section: Introductionmentioning

confidence: 99%

Non-aqueous phase liquid-contaminated soil remediation by ex situ dielectric barrier discharge plasma

Aggelopoulos

Tsakiroglou

Ognier

et al. 2014

Int. J. Environ. Sci. Technol.

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“…Discharges where plasmas can come in direct contact with the solution are the most attractive because in this case it is possible to use the most part of plasma active species more completely. Different types of discharges and setups have been used for these purposes including discharges with one or two liquid electrodes [1][2][3], pulse positive streamer corona discharge generated in aqueous solutions [4,5] and dielectric barrier discharge (DBD) [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…The most part of known studies is devoted to investigations of the decomposition processes of water solutions of pure chemical compounds such as various organic dyes [1,9], phenol [2,4,6,8] and its derivatives (resorcin, pyrocatechol, hydroquinone) [ [7,10] and some others. At the same time, it would be interesting to check the capabilities of such methods for purification of real wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Application of Dielectric Barrier Discharge for Waste Water Purification

Grinevich

Kvitkova

Plastinina

et al. 2011

Plasma Chem Plasma Process

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This study considers treatment of real city rain sewage under the action of an oxygen dielectric barrier discharge (DBD) at atmospheric pressure in the presence or absence of TiO 2 catalyst in the plasma zone. The DBD discharge has been shown to have high decomposition efficiency (up to 98%) for oil hydrocarbons, phenols and synthetic surfactants. The discharge action resulted in the decrease of heavy metal (Pb, Cd, Fe, Mn) content as well. In a plasma-catalytic hybrid process, the efficiency of organic substances decomposition was higher than efficiency for the DBD treatment without catalyst.

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“…6, we can see a broad strong adsorption band at 3438 cm À1 , which can be attributed to the n(O-H) stretching vibrations of water or phenolic hydroxyl groups associated with hydrogen bonds and carboxylic groups. [29][30][31][32] The broad band centered at 1632 cm À1 can be assigned to the dOH bending vibration of H 2 O molecules in the interlayer spaces. 33 The band at around 1382 cm À1 was the IR characteristic peak of NO 3 À , which originated from (Cu(NO 3 ) 2 ) used in the adsorbent preparation process.…”

Section: àmentioning

confidence: 99%

Arsine adsorption in copper-exchanged zeolite under low temperature and micro-oxygen conditions

et al. 2017

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Arsenic pollution is a worldwide issue. Nearly all arsenic is converted to arsine (AsH 3 ) under the reducing atmosphere required for the gasification process. Growing industrialization has increased AsH 3 emissions, for example, the ore smelting process leads to AsH 3 emissions. The conditions used in the ore smelting process are low temperature and micro-oxygen. A series of Hb zeolites loaded on different metal oxides has been prepared using an impregnation method and tested for adsorption of arsine (AsH 3 ) under low temperature and micro-oxygen conditions. Based on the results obtained from the adsorbent optimization experiments, Hb zeolite modified with Cu(NO 3 ) 2 (denoted as Cu/Hb) was found to possess a significantly enhanced adsorption removal ability towards arsine. The effects of the impregnation concentration, calcination temperature, reaction temperature, and oxygen content on the AsH 3 removal process were investigated. The results indicate that adsorbents with 0.2 mol L À1 Cu(NO 3 ) 2 after calcination at 400 C have superior activity for AsH 3 removal. In addition, a breakthrough capacity of 43.7 mg AsH 3 /g adsorbent at 60 C as well as 1.0% oxygen was observed with Cu/Hb for the AsH 3 adsorption process. The structure and surface properties of the Hb zeolite samples were characterized by N 2 -BET (N 2 adsorption/desorption), XRD (X-ray powder diffraction), XPS (X-ray photoelectron spectroscopy), and FTIR (Fourier transform infrared) spectroscopy. It is feasible that the exhausted Cu/Hb can be regenerated by thermal desorption, and the adsorbents can be recycled at least two times with little capacity loss.

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Simulataneous pentachlorophenol decomposition and granular activated carbon regeneration assisted by dielectric barrier discharge plasma

Cited by 64 publications

References 51 publications

Non-aqueous phase liquid-contaminated soil remediation by ex situ dielectric barrier discharge plasma

Non-aqueous phase liquid-contaminated soil remediation by ex situ dielectric barrier discharge plasma

Application of Dielectric Barrier Discharge for Waste Water Purification

Arsine adsorption in copper-exchanged zeolite under low temperature and micro-oxygen conditions

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