Verónica C Garcia

• Universidad Abierta

Further to Directive 2009/28/EC on the promotion of the use of energy from renewable sources, the share of biofuels in transport should rise to a minimum of 10% in Member States by 2020. In Finland, the goal is set at 20%, and it is estimated that this can be produced entirely in domestic factories, as long as the projects already underway will be...

This paper reports the selective separation of zinc over iron from spent pickling wastes or effluents using two different membrane-based solvent extraction process configurations, Non-Dispersive Solvent Extraction (NDSX) and Emulsion Pertraction Technology (EPT). The process aims to obtain a highly concentrated zinc solution with a negligible conte...

The metal mining of certain minerals is associated with the generation of acid mine drainage waters and effluents containing cyanides that can have long-term negative impacts on waterways and biodiversity. Obtaining valuable components from those effluents would improve the resource efficiency and the environmental performance of mining. This paper...

This paper presents the stability and performance of a polyvinyl alcohol-TiO2 (Helmholtz-Zentrum Geesthacht, HZG) membrane for removing water from 1-allyl-3-methylimidazolium chloride ([AMIM]Cl) using pervaporation. The impact of the ionic liquid (IL) on the membrane was assessed through the pervaporation of water/n-butanol mixtures (5 wt%/95 wt%)...

Organic solvents in chemical industry wastewaters are not only a pollution and health problem but also a sign of inefficient use of resources. This paper reports a methodology based on pervaporation, using first hydrophobic then hydrophilic membranes, for the separation of n-butanol and dichloromethane from sodium chloride containing aqueous mixtur...

This work reports the influence of the temperature on the selective removal of zinc and iron from a chromium(III) passivation bath by emulsion pertraction technology using Cyanex 272 as extractant and hollow fiber membrane contactors. The results indicate that the kinetics of the separation was largely influenced by the temperature in the range 10–...

There is an increasing interest in the production of chemicals and fuels from renewable resources due to the continuing price increase of fossil resources, the insecurity of the availability of fossil resources in the future, and additionally environmental concerns and legislations. Biobutanol may be produced by the acetone-butanol-ethanol (ABE) fe...

This paper reports pervaporation of water from the ternary water/dichloromethane/n-butanol system using a hydrophilic poly(vinyl alcohol) based membrane (GKSS Forschungszentrum). In order to optimize the separation process, an experimental design approach with one process and three formulation factors was applied. The parameters studied were feed t...

The separation of volatile organic compounds (VOCs) from chemical waste streams containing salts is an interesting pervaporation (PV) application for recovery purposes. In this study, the separation of n-butanol (n-BuOH) by PV was investigated, and the influence of temperature, membrane choise, feed concentration, and the presence of sodium chlorid...

The removal of zinc from synthetic wastewater was conducted by micellar-enhanced ultrafiltration (MEUF), using the anionic surfactant sodium dodecyl sulfate (SDS). A two-level full factorial design was used in order to analyze the effect of pressure, membrane nominal molecular weight limit (NMWL), zinc feed concentration, and SDS feed concentration...

In this paper, pervaporation (PV) of dichloromethane (DCM) from binary and multicomponent systems at different feed concentrations and temperatures using a commercial hydrophobic membrane CMX-GF-010-D (CELFA AG, Switzerland) is reported. Coupling effects are studied by permeating DCM/n-butanol/water ternary mixtures. The effect of sodium chloride o...

To gather data on the resource efficiency of the chemical sector, a questionnaire was sent to the chemical companies in the Northern Ostrobothnia region of Finland. Resource use optimisation was investigated by analysing measures and attitudes toward waste prevention. The survey revealed that legislation is the main driver for change in the chemica...

BACKGROUND: In the present work, the flavor compounds of natural juice of bilberries were qualitatively analyzed by GC-MS, leading to the identification of trans-Hex-2-en-1-ol as one of the major ‘impact aroma’ compounds of this fruit. The pervaporation of trans-Hex-2-en-1-ol from diluted aqueous solutions was studied using commercial polydimethyls...

In this study, the removal of zinc ions (Zn2+) and n-butanol (n-BuOH), including salt (NaCl) from model synthetic wastewater was investigated by micellar-enhanced ultrafiltration (MEUF) using sodium dodecyl sulfate (SDS). Statistical experimental design was used in order to analyze the effect of initial concentration of Zn2+, n-BuOH, SDS, NaCl on t...