Remediation of a chlorinated aromatic hydrocarbon in water by photoelectrocatalysis

Nissen, Silke; Alexander, Bruce D.; Dawood, Ilyas; Tillotson, Martin R.; Wells, Richard; Macphee, Donald E.; Killham, K.

doi:10.1016/j.envpol.2008.07.024

Cited by 19 publications

(9 citation statements)

References 38 publications

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“…Reactor design for solar photoelectrochemical applications is reported in the literature [245,246] though it should be more thoroughly described. For this purpose, there should be more interdisciplinary research contributing to advances in this field [247].…”

Section: Operational Issues Of the Photoelectrocatalysis Applicationsmentioning

confidence: 99%

Achievements and Trends in Photoelectrocatalysis: from Environmental to Energy Applications

et al. 2015

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The great versatility of semiconductor materials and the possibility of generation of electrons, holes, hydroxyl radicals, and/or superoxide radicals have increased the applicability of photoelectrocatalysis dramatically in the contemporary world. Photoelectrocatalysis takes advantage of the heterogeneous photocatalytic process by applying a biased potential on a photoelectrode in which the catalyst is supported. This configuration allows more effectiveness of the separation of photogenerated charges due to light irradiation with energy being higher compared to that of the band gap energy of the semiconductor, which thereby leads to an increase in the lifetime of the electron-hole pairs. This work presents a compiled and critical review of photoelectrocatalysis, trends and future prospects of the technique applied in environmental protection studies, hydrogen generation, and water disinfection. Special attention will be focused on the applications of TiO 2 and the production of nanometric morphologies with a great improvement in the photocatalyst properties useful for the degradation of organic pollutants, the reduction of inorganic contaminants, the conversion of CO 2 , microorganism inactivation, and water splitting for hydrogen generation.

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Section: Operational Issues Of the Photoelectrocatalysis Applicationsmentioning

confidence: 99%

Achievements and Trends in Photoelectrocatalysis: from Environmental to Energy Applications

et al. 2015

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“…The constant current density or bias potential applied to the semiconductor electrode promotes the efficient separation of electron-hole pairs and accelerates the production of photogenerated oxidizing species onto the catalyst surface (MartinezHuitle & Brillas 2009). In this view, it is not surprising that PEC has recently found a wide range of environmental applications, including degradation of organic pollutants and Pharmaceuticals, detoxification of aqueous samples, wastewater remediation and microbial inactivation (Fraga et al 2009;Martínez-Huitle & Brillas 2009;Nissen et al 2009;Egerton 2on;Frontistis et al 2on;Li et al 2011;Sirés & Brillas 2on).…”

Section: Introductionmentioning

confidence: 92%

Photoelectrocatalytic disinfection of water and wastewater: performance evaluation by qPCR and culture techniques

Venieri

Chatzisymeon

Politi

et al. 2012

Journal of Water and Health

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Photoelectrocatalytic oxidation (PEC) was evaluated as a disinfection technique using water and secondary treated wastewater spiked with Escherichia coli and Enterococcus faecalis. PEC experiments were carried out using a TiO(2)/Ti-film anode and a zirconium cathode under simulated solar radiation. Bacterial inactivation was monitored by culture and quantitative polymerase chain reaction (qPCR). Inactivation rates were enhanced when the duration of the treatment was prolonged and when the bacterial density and the complexity of the water matrix were decreased. E. coli cells were reduced by approximately 6 orders of magnitude after 15 min of PEC treatment in water at 2V of applied potential and an initial concentration of 10(7) CFU/mL; pure photocatalysis (PC) led to about 5 log reduction, while electrochemical oxidation alone resulted in negligible inactivation. The superiority of PEC relative to PC can be attributed to a more efficient separation of the photogenerated charge carriers. Regarding disinfection in mixed bacterial suspensions, E. coli was more susceptible than E. faecalis at a potential of 2V. The complex composition of wastewater affected disinfection efficiency, yielding lower inactivation rates compared to water treatment. qPCR yielded lower inactivation rates at longer treatment times than culture techniques, presumably due to the fact that the latter do not take into account the viable but not culturable state of microorganisms.

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“…Additionally, plasmid pUCD607 containing the luxCDABE genes isolated from V. fischeri (Shaw and Kado, 1986) has been introduced to non-luminescent bacteria for bioreporter development. Two strains constructed using pUCD607, E. coli HB101 (pUCD607) (Rattray et al, 1990) and P. fluorescens 10586 (pUCD607) (Aminhanjani et al, 1993), have been utilized to assess toxicity in a variety of soil and water samples (Bhattacharyya et al, 2005; Bundy et al, 2001; Dawson et al, 2007; Flynn et al, 2002, 2003; Nissen et al, 2009; Paton et al, 2006a,b; Tiensing et al, 2002). A bioluminescently tagged Acinetobacter strain DF4/pUTK2 was also developed and successfully applied to monitor for heavy metal toxicity in industrial and municipal wastewater samples (Abd-El-Haleem et al, 2006).…”

Section: Bacterial Bioreporter Applications In Environmental Assesmentioning

confidence: 99%

Genetically modified whole-cell bioreporters for environmental assessment

Sayler

et al. 2013

Ecological Indicators

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Living whole-cell bioreporters serve as environmental biosentinels that survey their ecosystems for harmful pollutants and chemical toxicants, and in the process act as human and other higher animal proxies to pre-alert for unfavorable, damaging, or toxic conditions. Endowed with bioluminescent, fluorescent, or colorimetric signaling elements, bioreporters can provide a fast, easily measured link to chemical contaminant presence, bioavailability, and toxicity relative to a living system. Though well tested in the confines of the laboratory, real-world applications of bioreporters are limited. In this review, we will consider bioreporter technologies that have evolved from the laboratory towards true environmental applications, and discuss their merits as well as crucial advancements that still require adoption for more widespread utilization. Although the vast majority of environmental monitoring strategies rely upon bioreporters constructed from bacteria, we will also examine environmental biosensing through the use of less conventional eukaryotic-based bioreporters, whose chemical signaling capacity facilitates a more human-relevant link to toxicity and health-related consequences.

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Remediation of a chlorinated aromatic hydrocarbon in water by photoelectrocatalysis

Cited by 19 publications

References 38 publications

Achievements and Trends in Photoelectrocatalysis: from Environmental to Energy Applications

Achievements and Trends in Photoelectrocatalysis: from Environmental to Energy Applications

Photoelectrocatalytic disinfection of water and wastewater: performance evaluation by qPCR and culture techniques

Genetically modified whole-cell bioreporters for environmental assessment

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