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204. Cork boiling wastewater treatment and reuse through combination of advanced oxidation technologies.

Author

Ponce-Robles, L., Miralles-Cuevas, S., Oller, I., Agüera, A., Trinidad-Lozano, M., Yuste, F., and Malato, S.

Subjects
WASTEWATER treatment, OXIDATION, HERBICIDES, PESTICIDES, BIODEGRADATION, WATER consumption
Abstract

Industrial preparation of cork consists of its immersion for approximately 1 hour in boiling water. The use of herbicides and pesticides in oak tree forests leads to absorption of these compounds by cork; thus, after boiling process, they are present in wastewater. Cork boiling wastewater shows low biodegradability and high acute toxicity involving partial inhibition of their biodegradation when conventional biological treatment is applied. In this work, a treatment line strategy based on the combination of advanced physicochemical technologies is proposed. The final objective is the reuse of wastewater in the cork boiling process; thus, reducing consumption of fresh water in the industrial process itself. Coagulation pre-treatment with 0.5 g/L of FeCl attained the highest turbidity elimination (86 %) and 29 % of DOC elimination. Similar DOC removal was attained when using 1 g/L of ECOTAN BIO (selected for ozonation tests), accompanied of 64 % of turbidity removal. Ozonation treatments showed less efficiency in the complete oxidation of cork boiling wastewater, compared to solar photo-Fenton process, under the studied conditions. Nanofiltration system was successfully employed as a final purification step with the aim of obtaining a high-quality reusable permeate stream. Monitoring of unknown compounds by LC-QTOF-MS allowed the qualitative evaluation of the whole process. Acute and chronic toxicity as well as biodegradability assays were performed throughout the whole proposed treatment line. [ABSTRACT FROM AUTHOR]

Published
2017
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207. LC/MS and LC/MS/MS strategies for the evaluation of pesticide intermediates formed by degradative processes: Photo-Fenton degradation of diuron

Author

Malato, S., Albanis, T., Piedra, L., Aguera, A., Hernando, D., and Fernandez-Alba, A.

Subjects
water-purification, oxidation processes, chemical oxidation, tio2, photocatalytic degradation, nitrogen, organic-compounds
Abstract

Transformation products (TPs) obtained from diuron under photo-Fenton pilot scale degradation process were evaluated using various high performance liquid chromatography systems with electrospray ionization and provided by different analyzers such as quadrupole, ion trap and time of flight. The base peaks obtained in all cases were the protonated molecules (M+H)(+) and very similar fragmentation patterns Were obtained in all cases by the different systems. The use of single quadrupole lead to the determination of structures based on the molecular weight and one additional fragment ion obtained by increase of the fragmentor voltage. The structures proposed in this way were related with suspected oxidative reactions as a consequence of the attack of the OH radicals generated. Ion trap allowed the confirmation of the structures proposed in this way were related with suspected oxidative reactions as a consequence of the attack of the OH radicals generated. Ion trap allowed the confirmation of the structures of suspected and unknowns compounds by applying multiple mass spectrometric analyses (MS2 and MS3). The application of TOF was relevant, in the determination of open ring structures that were only possible to identify by using accurate mass information. Furthermore additional parameters such as total organic carbon, organic ions and inorganic species were also evaluated to assess the proposed degradation pathway. Liquid Chromatography/Mass Spectrometry, Ms/Ms and Time-of-Flight Ms

Published
2003

210. Fe-zeolites as heterogeneous catalysts in solar Fenton-like reactions at neutral pH

Author

Gonzalez-Olmos, Rafael, Martin, M.J., Georgi, Anett, Kopinke, Frank-Dieter, Oller, I., Malato, S., Gonzalez-Olmos, Rafael, Martin, M.J., Georgi, Anett, Kopinke, Frank-Dieter, Oller, I., and Malato, S.

Abstract

This paper focuses on the study of photo-Fenton-like processes using two types of Fe-zeolites (Fe-ZSM5 and Fe-Beta) as heterogeneous catalysts in order to treat contaminated effluents with organic compounds at neutral pH. It was proved that light (solar and artificial) improves significantly the DOC removal in this kind of processes. A possible contribution by homogeneous photo-Fenton reaction catalyzed by the iron leached during the reaction was insignificant. This study also proves that the catalytic activity of Fe-zeolites is improved by photo Fenton-like processes using solar light in a pilot plant equipped with compound parabolic collectors (CPC).

Published
2012

215. Effect of Related and Unrelated Donor Haematopoietic Stem-Cell Transplantation on Outcome in Adults With High Risk Hematological Disease: An intention-to-treat Analysis of 410 Patients at a Single Center Institution

Author

Lupo-Stanghellini, M.T., primary, Forno, B., additional, Marcatti, M., additional, Bitetti, C., additional, Coppola, M., additional, Assanelli, A., additional, Greco, R., additional, Lunghi, F., additional, Tassara, M., additional, Guggiari, E., additional, Carrabba, M., additional, Matteazzi, F., additional, Camba, L., additional, Clerici, D., additional, Malato, S., additional, Marktel, S., additional, Bonini, C., additional, Bordignon, C., additional, Corti, C., additional, Bernardi, M., additional, Peccatori, J., additional, and Ciceri, F., additional

Published
2011
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227. Application of solar photo-Fenton at circumneutral pH to nanofiltration concentrates for removal of pharmaceuticals in MWTP effluents.

Author

Miralles-Cuevas, S., Oller, I., Pérez, J., and Malato, S.

Subjects
NANOFILTRATION, POLLUTANTS, OXIDATION, OPERATING costs, SOLAR photosphere, HYDROGEN peroxide
Abstract

In view of the inefficient elimination of micro-pollutants by today's conventional biological treatments and new legislation requiring elimination of at least 80 % of their concentration, the application of an advanced tertiary treatment must be studied. A good option would be advanced oxidation processes (AOPs), which have very often been combined with physicochemical pre-treatSments to increase efficiency or reduce operating costs. This study focused on the combination of membrane nanofiltration and solar photo-Fenton for the main purpose of removing five pharmaceuticals (sulfamethoxazole, ibuprofen, ofloxacin, carbamazepine and flumequine) from real MWTP effluents under realistic conditions (μg L). This research also included tests performed with modified photo-Fenton using a low iron concentration at circumneutral pH and a low hydrogen peroxide dose, in an attempt to reduce major treatment costs. Over 80 % of dissolved organic carbon, chemical oxygen demand and turbidity were also retained during nanofiltration, making pharmaceutical removal less efficient in terms of concentrate treatment time than direct treatment, i.e. the concentrate illumination time was around 150 min while direct treatment was around 40 min. Nevertheless, it should be highlighted that, although no savings in installation costs was observed for the combined system (nanofiltration/solar photo-Fenton), the reaction rate improved and so, there was a savings in reagent costs (mainly hydrogen peroxide and sulfuric acid). [ABSTRACT FROM AUTHOR]

Published
2015
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234. Advanced microbiological tools for tracking complex wastewater treatment efficiency through the combination of physicochemical and biological technologies

Author

Ruíz-Delgado, A., Ponce-Robles, L., Salmerón, I., Oller, I., Polo-López, M.I., and Malato, S.

Abstract

Landfill leachate is a strongly polluted complex wastewater generated due to rain percolation, which treatment is not completely solved, yet. Its non-biodegradable character makes it necessary to design a specific treatment train by combining conventional and advanced processes for reducing operating costs, allowing its reuse and potentially recovering nutrients. This work presents a strategy based on a coagulation/flocculation pre-treatment step, an advanced oxidation process combined with an advanced bioreactor for landfill leachate remediation at pilot scale. In the physicochemical step, 30% of DOC and 45% of turbidity removal were obtained with 0.5 g/L of FeCl3at pH 5. The comparison between ozonation and solar photo-Fenton processes as second step showed the highest biodegradability improvement in the last one. Subsequently, a continuous flow rate in the bioreactor was established in 9.6 mL/min (around 60% of DOC elimination). 150 g of sodium bicarbonate was added to the feeding stream to favor the autotrophic bacteria action. The maximum treatment capacity attained was 0.71 mg of COD/L·h and 1.40 mg N-NH4+/L·h with a hydraulic residence time of 2.7 days. The main innovation of this work lays in the application of advanced microbiological techniques such as Quantitative Polymerase Chain Reaction (qPCR) and massive sequencing allowing the characterization and identification of the new microbial population capable of facing the treatment of landfill leachate. The phylum Proteobacteria,responsible for nitrogen fixation, was the most abundant found in the bioreactor at the end of its continuous operation (45.8% of abundance). This information is especially valuable for the design of advanced specific biological systems.

Published
2022
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243. Dynamic modelling for cork boiling wastewater treatment at pilot plant scale.

Author

Torres-Socías, E., Cabrera-Reina, A., Trinidad, M., Yuste, F., Oller, I., and Malato, S.

Subjects
WASTEWATER treatment, DYNAMIC models, PILOT plants, SEWAGE purification, CHEMICAL oxygen demand, TOTAL suspended solids, HYDROGEN peroxide, MATHEMATICAL models
Abstract

Solar photo-Fenton process has been extensively reported to be highly efficient in the remediation of complex industrial wastewater containing several families of pollutants such as pharmaceuticals, dyes, pesticides, derivatives of wine, etc. Moreover, solar photo-Fenton mathematical modelling regarded as a powerful tool for scaling-up and process control purposes is hindered by the complexity and variability of its reaction mechanism which depends on the particular wastewater under study. In this work, non-biodegradable cork boiling wastewater has been selected as a case study for solar photo-Fenton dynamic modelling by using MATLAB® software. First of all physic-chemical pretreatment was applied attaining chemical oxygen demand (COD) reductions between 43 and 70 % and total suspended solid (TSS) reductions between 23 % and 59 %. After solar photo-Fenton treatment, COD decreased between 45 and 90 % after consumptions of HO varying around 1.9 and 2.4 g/L. Individual calibration of the semi-empirical model by using experimental results made it possible to perfectly predict hydrogen peroxide variations throughout the treatment. It must be highlighted that slight deviations between predictions and experimental data must be attributed to important changes in wastewater characteristics. [ABSTRACT FROM AUTHOR]

Published
2014
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244. Microcontaminant removal by solar photo-Fenton at natural pH run with sequential and continuous iron additions.

Author

Carra, I., Malato, S., Jiménez, M., Maldonado, M.I., and Sánchez Pérez, J.A.

Subjects
*FENTON'S reagent, *PH effect, *IRON, *MICROPOLLUTANTS, *BICARBONATE ions, *REACTION time, *THIABENDAZOLE
Abstract

Highlights: [•] Continuous and sequential iron dosage allowed micropollutants removal at natural pH. [•] Bicarbonates were detrimental to the process efficiency when using iron additions. [•] Iron addition mode affects reaction time and efficacy. [•] Continuous addition allows a better distribution of iron in the photo-reactor. [•] Acetamiprid, thiabendazole and imazalil degradation could be achieved in 15min. [Copyright &y& Elsevier]

Published
2014
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