Susana Rodriguez-Couto | Ikerbasque - Academia.edu (original) (raw)

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Papers by Susana Rodriguez-Couto

Biochemical Engineering Journal, 2005

Journal of Basic Microbiology, 2022

Handbook of Biofuels, 2022

Development in Wastewater Treatment Research and Processes, 2022

Polyhedron, 2020

Abstract In the present work, praseodymium-doped cadmium tungstate (Pr-CdWO4) nanoparticles were ... more Abstract In the present work, praseodymium-doped cadmium tungstate (Pr-CdWO4) nanoparticles were synthesized, characterized and used as catalysts in a sonocatalytic process to degrade the toxic synthetic azo dye Remazol Black B (RBB). RBB was degraded by 93.9% operating at optimal conditions (pH=3, C=100 mg/L, catalyst dosage=0.35 g/L, T=298 K and irradiation time100 min) under an ultrasonic bath at 60 kHz. Further, the addition of different radical scavengers and enhancers to the reaction was assessed. It was found that the addition of the radical scavengers sodium sulfate, sodium carbonate, and sodium chloride decreased RBB degradation from 93.9% to 86.0%, 78.0%, and 71.2%, respectively. On the contrary, the addition of the enhancers potassium periodate, peroxydisulfate and hydrogen peroxide slightly increased the RBB degradation from 93.9% to 95.3%, 96.1%, and 98.7%, respectively. The sonocatalytic process resulted in higher RBB degradation than by applying separately sonolysis (34.7%) and the catalyst as an adsorbent (39.5%). The experimental data followed both the pseudo-first-order (PFO) and Langmuir-Hinshelwood (L-H) kinetics models. However, the PFO gave better fitting (R2=0.993) than the L-H kinetic model (R2=0.9025) at the same optimum experimental conditions. The obtained results pointed out the sonocatalytic process with Pr-doped CdWO4 nanoparticles as a promising process for the degradation of azo dyes and other hazardous organic compounds existing in wastewater.

DESALINATION AND WATER TREATMENT, 2020

Biotechnology Letters, 2020

Agro-industrial residues and by-products are a crescent environmental problem since they are ofte... more Agro-industrial residues and by-products are a crescent environmental problem since they are often discarded without proper treatment, and still have growing production. These residues are rich from a nutritional point of view and contain various industrial relevant compounds, such as phenolic compounds, fibers, vitamins, sugars and others. The crescent worrying about environmental issues has led researchers and industries to focus on “eco-friendly” solutions for everyday problems. In this sense, the use of enzymes for the valorization of agro-industrial residues is a safe and green alternative technology. Hence, this review aims to show the enzyme potential for the use and valorization of several agro-industrial residues, focusing on the most produced residues worldwide, such as fruits, grains and lignocellulosic residues, as well as a brief explanation of microbial enzymes, its production and optimization, altogether with tools to identify producing microorganisms.

International Journal of Environmental Analytical Chemistry, 2020

In the present study the magnetic nanocomposite FeNi3/SiO2/CuS was synthesised to be applied as a... more In the present study the magnetic nanocomposite FeNi3/SiO2/CuS was synthesised to be applied as a dye adsorbent. The synthesised nanocomposite was characterised using Transmission Electron Microsco...

Advanced Powder Technology, 2019

Journal of Molecular Liquids, 2016

Abstract In the present paper, the removal of ethidium bromide (EtBr) from aqueous solutions in a... more Abstract In the present paper, the removal of ethidium bromide (EtBr) from aqueous solutions in a batch system using natural (NP) and aluminium-coated pumice (ACP) as alternative low-cost adsorbents was investigated. The maximum adsorption capacity, q m (mg/g) was 58.82 and 76.92 mg/g for NP and ACP, respectively, operating at an initial pH of 8, an adsorbent dose of 8 g/L, a contact time of 210 min and an initial EtBr concentration of 30 mg/L. The equilibrium data of both adsorbents fitted the Freundlich isotherm model, indicating the heterogeneity of the adsorbent surface. In addition, the adsorption rate of both adsorbents was well described by the pseudo-second-order kinetics model. This indicated chemisorption was the rate-controlling step of the adsorption process which occurred by ion exchange. Within the performed study, a three-layer artificial neural network (ANN) model was also developed to predict the efficiency of EtBr removal. Computational results clearly demonstrated that the ANN model was able to predict the combined effect of initial pH, adsorbent dose, contact time and initial EtBr concentration on the adsorption efficiency with a very high determination coefficient ( R 2 = 0.998) and a low relative error (RE = 0.037).

Journal of Chemical Technology & Biotechnology

Desalination and Water Treatment, 2015

RSC Adv., 2015

Endogenous bacterial strains possessing a high bisphenol A (BPA)-tolerance/degradation activity w... more Endogenous bacterial strains possessing a high bisphenol A (BPA)-tolerance/degradation activity were isolated from different outlets of petrochemical wastewater in Iran using the enrichment cultivation approach.

Acta Biotechnologica, 2000

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