Effect of water matrix on photocatalytic degradation and general kinetic modeling

Rioja, Nerea; Zorita, Saioa; Peñas, Francisco Javier

doi:10.1016/j.apcatb.2015.06.038

Cited by 102 publications

(34 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The degradation of our mixture follows this behaviour, namely degradation happens first for BeP/BuP and finally MP [4]. The kinetics of degradation reactions may be highly dependent upon the matrix [31,32]. A study with an emerging pollutant mixture of Tetracycline, Caffeine, Paracetamol and Atenolol verified that the effect of using a mixture was negligible on the decrease of mineralization efficiency [31].…”

Section: Effect Of Noble Metal Loading On the Parabens Degradationmentioning

confidence: 92%

“…Therefore, comparing with our results, the synergistic effect of mixture could be minimal on the parabens degradation. When real water is used, the inorganic salts present in the matrix, especially carbonates, could decrease the removal efficiency [32]. On the other hand, some inorganic compounds such as sulfate and chlorine can improve the reverse effect, increasing the efficiency of emerging contaminants removal [33].…”

Section: Effect Of Noble Metal Loading On the Parabens Degradationmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Noble Metals (Ag, Pd, Pt) Loading over the Efficiency of TiO2 during Photocatalytic Ozonation on the Toxicity of Parabens

et al. 2018

View full text Add to dashboard Cite

Abstract:The conventional wastewater treatments are inadequate for emerging contaminants detoxification. Photocatalytic ozonation with suitable catalyst can be considered as a suitable solution on the removal of these compounds. The aim of this study was to verify the effect of Ag, Pd and Pt with different loadings (0.1, 0.5 and 1% wt %) onto TiO 2 surface for the degradation of a mixture of parabens (methyl, ethyl, propyl, butyl and benzyl) through photocatalytic ozonation. Chemical oxygen demand (COD) and total organic carbon (TOC) was also analyzed after treatments, as well as the effect of the treatment on the samples toxicity over different species, including bacteria, clams and plants. The effect of metal loading on the parabens degradation; COD and TOC removal is very dependent upon the type of noble metal used. This can be related with the different pathways influenced by the metal load. On the one hand, it can be related with the reduction of electron-hole recombination phenomenon, and, on the other hand, the trapping of electrons by the metals reduces the amount of ozonide and hydroxyl radicals produced. In terms of toxicity, apparently the best results were achieved with the intermediate noble metal load. However, the effect of noble metal load must be analyzed case to case.

show abstract

Section: Effect Of Noble Metal Loading On the Parabens Degradationmentioning

confidence: 92%

Section: Effect Of Noble Metal Loading On the Parabens Degradationmentioning

confidence: 99%

Effect of Noble Metals (Ag, Pd, Pt) Loading over the Efficiency of TiO2 during Photocatalytic Ozonation on the Toxicity of Parabens

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Photodegradation rates depend on salt concentration, pH, COD of water and size of catalyst aggregates [36]. Therefore, we executed all the remaining tests in distilled water to assess the fragmentation pathway in different processes in an ideal case, i.e.…”

Section: Photolysis and Photocatalysismentioning

confidence: 99%

An ultrasound-assisted photocatalytic treatment to remove an herbicidal pollutant from wastewaters

Schieppati

Galli

Peyot

et al. 2019

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

Pollutants of emerging concern contaminate surface and ground water. Advanced oxidation processes treat these molecules and degrade them into smaller compounds or mineralization products. However, little information on coupled advanced oxidation techniques and on the degradation pathways of these pollutants is available to identify possible ecotoxic subproducts. In the present work, we investigate the ultrasound assisted photocatalytic degradation pathway of the herbicide Isoproturon. We worked in batch mode in a thermostatic glass reactor. We compared the activity of nanometric TiO 2 P25 with that of Kronos 1077, a micrometric TiO 2. We discuss the individual, additive and synergistic degradation action of photolysis, sonolysis, sonophotolysis, and sonophotocatalysis by varying catalyst loading and/or ultrasound power for the last three techniques. With 0.1 g L −1 catalyst, photocatalysis and sonophotopcatalysis completely degrade Isoproturon within 240 min and 60 min, respectively (> 99 % conversion). Sonophotocatalysis breaks Isoproturon down into smaller molecules than photocatalysis alone.

show abstract

“… Regarding the real life application, various background water constituents have been reported to impose detrimental effects on the TiO2 slurry based photocatalytic systems [106,[166][167][168]. Due to the morphological differences between TiO2 fine particles and TNA, the interaction between background water constituents with TNA may differ from that in the case of TiO2 fine particles based system.…”

Section: Arfanis Et Al Reported Application Of Tnas For Photocatalytmentioning

confidence: 99%

“…To best represent the real implication, HCl was used to adjust the reaction solutions with phosphate or bicarbonate addition to circum-neutral (6-7). [106,[166][167][168]. In a study conducted by Rioja et al [167] investigated the effect of water matrix on the photodegradation of clofibric acid, and found that even the presence of 50 mg/L NaHCO3 or NaCO3 caused significant decrease in the clofibric acid degradation.…”

Section: Effect Of Inorganic Ionsmentioning

confidence: 99%

Micropollutant degradation in water by photochemical processes

Yin¹

View full text Add to dashboard Cite

Fast growing global population and economy result in an increasing water consumption worldwide. However, the amounts of usable water resources are limited: more than one-third of the accessible renewable fresh water on Earth is being exploited for industrial, agricultural, as well as domestic usage [1]. Locally, especially in water scarce areas, this is often reaching much higher levels, leading to overdraft of water resources [2]. Such facts call for the need to not only exploit new and alternative water resources but also to recycle water streams, to cope with the unfortunate increasing limitations in availability of fresh water sources. Meanwhile, the fast growing population and economy are leading to serious water pollution due to discharge of numerous contaminants into the environment, which in turn possess sever threats to the quality of water resources. Thus, the increasing worldwide demand for water consumption, the limited amount of water resources, and the water pollution make water treatment a vital measure to safeguard the water supply with sufficient quantity and quality that meets the demand of the society. Conventionally, concerns were given to pathogens, nutrients, heavy metals, suspended solids, and bulk organic pollutants (the amount of bulk organic pollutants generally present in concentrations at 0.1-10 g/l in waste water and often denoted with COD or BOD, meaning chemical or biological oxygen demand). Thus in most parts of the world water purification measures have been taken to tackle these problems [3, 4]. In recent decades, many emerging organic pollutants (generally present at rather low concentrations, i.e. ng/L to µg/L level, and therefore also termed as micropollutants). These include pharmaceuticals, antibiotics, herbicides, pesticides, chemicals from personal care products, etc., and have been detected the last two decades extensively in different water bodies worldwide. For instance, many pharmaceuticals were found in various portions of the aquatic system, i.e. in ground water, surface water, as well as in many drinking water sources according to a broad range of studies [5-11]. In a study conducted by Félix-Cañedo et al. in Mexico City, the presence of a group of organic micropollutants (including pharmaceuticals, hormones, herbicides) in several drinking water sources was reported, at concentrations ranging from ng/L to µg/L level [12]. In recent years, a broad range of micropollutants, including Other investigated homogeneous photochemical processes include UV/Cl2, UV/O3, UV/HOCl, UV/ClO2. Application of these techniques for removal of various micropollutants has been studied over last decades. It is reported that UV/Cl2 could achieve relatively good removal of carbamazepine from wastewater, but formation of toxic chlorinated byproducts was an issue [132, 133]. Kong et al. reported efficient degradation of atrazine by UV/Cl2 [134]. Examples of micropollutant removal by UV/O3, UV/HOCl, UV/ClO2, etc., are also abundant in literature [135-138]. 1.3 Research opportunities 1.3.1 Rese...

show abstract

Effect of water matrix on photocatalytic degradation and general kinetic modeling

Cited by 102 publications

References 38 publications

Effect of Noble Metals (Ag, Pd, Pt) Loading over the Efficiency of TiO2 during Photocatalytic Ozonation on the Toxicity of Parabens

Effect of Noble Metals (Ag, Pd, Pt) Loading over the Efficiency of TiO2 during Photocatalytic Ozonation on the Toxicity of Parabens

An ultrasound-assisted photocatalytic treatment to remove an herbicidal pollutant from wastewaters

Micropollutant degradation in water by photochemical processes

Contact Info

Product

Resources

About