A mild photochemical approach to the degradation of phenols from olive oil mill wastewater

Cermola, Flavio; DellaGreca, Marina; Iesce, M. R.; Montella, Stefania; Pollio, Antonino; Temussi, Fabio

doi:10.1016/j.chemosphere.2003.12.016

Cited by 46 publications

(39 citation statements)

References 21 publications

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“…Both consisted of accessible supercages (diameter about 13 ) and entry windows of 8 . The silica material was 80 % microporous (40 ) and 20 % mesoporous (120 ). Using benzophenone as a sensitizer, the authors showed that the lifetime of 1 O 2 decreases with the Si/Al ratio (35 ms for CBV 901 and 7.9 ms for CBV 100).…”

Section: Introductionmentioning

confidence: 99%

Singlet Oxygen in Microporous Silica Xerogel: Quantum Yield and Oxidation at the Gas–Solid Interface

et al. 2007

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The quantum yields of singlet oxygen ((1)O(2)) production (Phi(Delta)) and (1)O(2) lifetimes (tau(Delta)) at the gas-solid interface in silica gel material are determined. Different photosensitizers (PS) are encapsulated in parallelepipedic xerogel monoliths (PS-SG). PS were chosen according to their known photooxidation properties: 9,10-dicyanoanthracene (DCA), 9,10-anthraquinone (ANT), and a benzophenone derivative, 4-benzoyl benzoic acid (4BB). These experiments are mainly based on time-resolved (1)O(2) phosphorescence detection, and the obtained Phi(Delta) and tau(Delta) values are compared with those of a reference sensitizer for (1)O(2) production, 1H-phenalen-1-one (PN), included in the same xerogel. The trend between their ability to oxidize organic pollutants in the gas phase and their efficiency for (1)O(2) production is investigated through photooxidation experiments of a test pollutant dimethylsulfide (DMS). The Phi(Delta) value is high for DCA-SG relative to the PN reference, whereas it is slightly lower for 4BB-SG and for ANT-SG. Phi(Delta) is related to the production of sulfoxide and sulfone as the main oxidation products for DMS photosensitized oxidation. Additional mechanisms, leading to C--S bond cleaveage, appear to mainly occur for the less efficient singlet oxygen sensitizers 4BB-SG and ANT-SG.

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Section: Introductionmentioning

confidence: 99%

Singlet Oxygen in Microporous Silica Xerogel: Quantum Yield and Oxidation at the Gas–Solid Interface

et al. 2007

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“…In the tests where the Table 1 Levels of phenol reported in industrial wastewaters (Cermola et al, 2004;Kent, 1992;Rengaraj et al, 2002) An initial kinetic experiment was carried out up to 200 h using a 100 mg/l phenol solution in the absence of solids to assess the amount of phenol loss from the reaction bottles and to test the reproducibility of the analytical procedure. The residual phenol concentration at the conclusion of this test was 100 ± 0.1 mg/l, indicating excellent reproducibility and no significant phenol loss.…”

Section: Methodsmentioning

confidence: 99%

“…in appreciable quantities (Table 1) (Cermola et al, 2004;Kent, 1992;Rengaraj et al, 2002). Phenolic compounds have low allowable limits (0.5-1.0 mg/l) due to their toxicity to human and aquatic life and must be removed from wastewaters in environmentally acceptable ways.…”

Section: Introductionmentioning

confidence: 99%

Capacity and mechanism of phenol adsorption on lignite

Polat

Molva

Polat

2006

International Journal of Mineral Processing

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A raw lignitic coal from Soma, Turkey was investigated to determine its potential as an adsorbent for phenol removal from wastewaters. Kinetic batch tests demonstrated that phenol could be completely removed from solution given sufficient solids loading and reaction time. The adsorption capacity of 10 mg/g obtained with the lignite is low compared to those achievable with activated carbons (around 300 mg/g). However, when normalized for the surface area, the adsorption capacity was much larger for the lignite (1.3 mg/m 2 ) than that generally observed with activated carbons (0.05-0.3 mg/m 2 ). Hydrogen-bonding of the phenolic -OH with the oxygen sites on the lignite surface is the most likely mechanism for adsorption. Though water molecules also have affinity for the same oxygen sites, lateral benzene ring interactions make phenol adsorption energetically more favorable. Since phenol molecules adsorbed in this fashion would project their benzene rings into solution, formation of a second layer through the action of the dispersive π-π interactions between the benzene rings is very likely. Residual water quality with respect to major elements and heavy metals was within acceptable limits defined by the ASTM standards. Dissolution of organic matter from the lignite was also observed to be negligible.

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“…Nevertheless, none of these approaches, on their own, constitute a comprehensive solution to the problem of reducing phytotoxic compounds (Cermola et al, 2004). However, by combining the physical and biological treatments, it may be possible to use DOR as an organic amendment in agricultural soil (Aranda et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Reduced dry olive residue phytotoxicity in the field by the combination of physical and biological treatments

Aranda

Sampedro

García‐Sánchez

et al. 2012

J. Soil Sci. Plant Nutr.

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Olive oil extraction generates large amounts of olive mill residues (DOR) which may be used as organic fertilizer. The influence of a combination of physical fractionation and saprobe fungal incubation on the phytotoxicity of DOR was studied. The physical fractions of DOR, obtained following extraction using ethyl acetate (EDOR) and water (ADOR) were less phytotoxic than DOR with respect to the shoot dry weight of tomato. There was no relationship between the total phenol content of the different DOR physical fractions and their phytotoxicity. The saprophytic fungus Coriolopsis rigida reduced DOR and ADOR phytotoxicity and eliminated the phytotoxicity of EDOR. However, unlike the physical treatments of DOR, the decrease in the phenol content of EDOR and ADOR caused by C. rigida was closely paralleled to the decrease in their phytotoxicity. After 30 days of incubation, C. rigida was able to eliminate the phytotoxicity of EDOR on tomato plants grown in the field.

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A mild photochemical approach to the degradation of phenols from olive oil mill wastewater

Cited by 46 publications

References 21 publications

Singlet Oxygen in Microporous Silica Xerogel: Quantum Yield and Oxidation at the Gas–Solid Interface

Singlet Oxygen in Microporous Silica Xerogel: Quantum Yield and Oxidation at the Gas–Solid Interface

Capacity and mechanism of phenol adsorption on lignite

Reduced dry olive residue phytotoxicity in the field by the combination of physical and biological treatments

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