Insights into real cotton-textile dyeing wastewater treatment using solar advanced oxidation processes

Soares, Pétrick Anderson; Silva, Tânia F.C.V.; Manenti, Diego Ricieri; Souza, Selene M.A. Guelli U. de; Boaventura, Rui A.R.; Vilar, Vítor J.P.

doi:10.1007/s11356-013-1934-0

Cited by 112 publications

(39 citation statements)

References 35 publications

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“…2 Flowcharts of the pilot (a) and lab-scale (b) photoreactors. Reprinted (adapted) with permission from Soares et al (2013). Copyright © 2013, Springer-Verlag Berlin Heidelberg, License Number: 3195790385243. a TM temperature meter, pH pH meter, CPCs compound parabolic collectors, UV-R UV radiometer, RT recirculation tank, CP centrifugal pump, R rotameter, V1 and V2 recirculation/discharge valves, V3 and V4 flow rate control valves, V5 CPCs mode valve, V6 RTs feeding valve; solid line main path, dashed line alternative path; NRV non return valve.…”

Section: Discussionmentioning

confidence: 99%

Assessment of solar driven TiO2-assisted photocatalysis efficiency on amoxicillin degradation

Pereira

Reis

Nunes

et al. 2013

Environ Sci Pollut Res

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The objective of this work was to evaluate the efficiency of a solar TiO2-assisted photocatalytic process on amoxicillin (AMX) degradation, an antibiotic widely used in human and veterinary medicine. Firstly, solar photolysis of AMX was compared with solar photocatalysis in a compound parabolic collectors pilot scale photoreactor to assess the amount of accumulated UV energy in the system (QUV) necessary to remove 20 mg L −1 AMX from aqueous solution and mineralize the intermediary byproducts. Another experiment was also carried out to accurately follow the antibacterial activity against Escherichia coli DSM 1103 and Staphylococcus aureus DSM 1104 and mineralization of AMX by tracing the contents of dissolved organic carbon (DOC), low molecular weight carboxylate anions, and inorganic anions. Finally, the influence of individual inorganic ions on AMX photocatalytic degradation efficiency and the involvement of some reactive oxygen species were also assessed. Photolysis was shown to be completely ineffective, while only 3.1 kJUVL −1 was sufficient to fully degrade 20 mg L −1 AMX and remove 61 % of initial DOC content in the presence of the photocatalyst and sunlight. In the experiment with an initial AMX concentration of 2 40 mg L −1 , antibacterial activity of the solution was considerably reduced after elimination of AMX to levels below the respective detection limit. After 11.7 kJUVL −1 , DOC decreased by 71 %; 30 % of the AMX nitrogen was converted into ammonium and all sulfur compounds were converted into sulfate. A large percentage of the remaining DOC was in the form of low molecular weight carboxylic acids. Presence of phosphate ions promoted the removal of AMX from solution, while no sizeable effects on the kinetics were found for other inorganic ions. Although the AMX degradation was mainly attributed to hydroxyl radicals, singlet oxygen also plays an important role in AMX self-photosensitization under UV/ visible solar light.

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Section: Discussionmentioning

confidence: 99%

Assessment of solar driven TiO2-assisted photocatalysis efficiency on amoxicillin degradation

Pereira

Reis

Nunes

et al. 2013

Environ Sci Pollut Res

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“…A schematic representation and a detailed description can be consulted elsewhere (Soares et al, 2013). A stirred tank was filled with 20 mg L -1 OTC solution (total volume (Vt) = 1.2 L).…”

Section: Methodsmentioning

confidence: 99%

PROCESS INTENSIFICATION AT NEAR NEUTRAL pH OF A HOMOGENOUS PHOTO-FENTON REACTION USING FERRICARBOXYLATE COMPLEXES: APPLICATION TO OXYTETRACYCLINE DEGRADATION

PEREIRA¹,

QUEIRÓS²,

REIS³

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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-This work demonstrates the application at near neutral pH of the photoFenton process mediated by ferricarboxylates on the treatment of aqueous solutions containing the antibiotic Oxytetracycline (OTC) under solar irradiation. The formation of a Fe:OTC complex after Fe 2+ oxidation to Fe 3+ , in the presence of H2O2, showed the inconvenience of using the conventional Fe 2+ /H2O2/UV-Vis process at near neutral pH levels, as the Fe:OTC complex is retained in the filter. To overcome this, a Fe 3+ /Oxalate process was proposed. Process efficiency was evaluated for variables such as Fe 3+ concentration and pH, using a compound parabolic collector (CPC) photoreactor at lab-scale under simulated solar radiation. The effect of the matrix was also tested by spiking OTC into two different real wastewaters.

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“…The tremendous promise of AOPs has resulted in a major demand of nanophotocatalysts because photocatalysis is among the most popular AOPs [61][62][63][64].…”

Section: Photo-degradation Of Pollutants and Hazardous Compoundsmentioning

confidence: 99%

“…The main industrial applications of TiO 2 -based photocatalysts is for the degradation of dyes used in the textile industry [64], expired pharmaceutical compounds (drugs) [65], spills of toxic compounds like pesticides [66], natural toxins like cyanobacterial toxin microcystin-LR [61], and personal care products (such as a series of parabens) [67]. Such nanophotocatalysts have also been used for the treatment of winery wastewater using a photocatalytic reactor [68].…”

Section: Photo-degradation Of Pollutants and Hazardous Compoundsmentioning

confidence: 99%

Industrial synthesis and characterization of nanophotocatalysts materials: titania

Ramos-Delgado

Gracia-Pinilla

Mangalaraja

et al. 2016

Nanotechnology Reviews

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Despite the recent synthesis and identification of a diverse set of new nanophotocatalysts that has exploded recently, titanium dioxide (TiO 2 ) remains among the most promising photocatalysts because it is inexpensive, non-corrosive, environmentally friendly, and stable under a wide range of conditions. TiO 2 has shown excellent promise for solar cell applications and for remediation of chemical pollutants and toxins. Over the past few decades, there has been a tremendous development of nanophotocatalysts for a variety of industrial applications (i.e. for water purification and reuse, disinfection of water matrices, air purification, deodorization, sterilization of soils). This paper details traditional and new industrial routes for the preparation of nanophotocatalysts and the characterization techniques used to understand the physical chemical properties of them, like surface area, ζ potential, crystal size, and phase crystallographic, morphology, and optical transparency. Finally we present some applications of the industrial nanophotocatalysts.

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Insights into real cotton-textile dyeing wastewater treatment using solar advanced oxidation processes

Cited by 112 publications

References 35 publications

Assessment of solar driven TiO2-assisted photocatalysis efficiency on amoxicillin degradation

Assessment of solar driven TiO2-assisted photocatalysis efficiency on amoxicillin degradation

PROCESS INTENSIFICATION AT NEAR NEUTRAL pH OF A HOMOGENOUS PHOTO-FENTON REACTION USING FERRICARBOXYLATE COMPLEXES: APPLICATION TO OXYTETRACYCLINE DEGRADATION

Industrial synthesis and characterization of nanophotocatalysts materials: titania

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