A5008507038- Metal Extraction and Bioleaching
- Extraction and Separation Processes
- Environmental Chemistry and Analysis
- Lignin and Wood Chemistry
- Electrochemical Analysis and Applications
- Catalysis and Hydrodesulfurization Studies
- Chemical and Physical Properties in Aqueous Solutions
- Minerals Flotation and Separation Techniques
- Analytical chemistry methods development
- Recycling and Waste Management Techniques
- Adsorption and biosorption for pollutant removal
- Surfactants and Colloidal Systems
- Asymmetric Synthesis and Catalysis
- Analytical Chemistry and Sensors
- Membrane-based Ion Separation Techniques
- Electrodeposition and Electroless Coatings
- Forest ecology and management
- Free Radicals and Antioxidants
- Aerogels and thermal insulation
- Antimicrobial agents and applications
- Medical Imaging and Analysis
- Microbial Inactivation Methods
- Vanadium and Halogenation Chemistry
- IoT-based Smart Home Systems
- Ionic liquids properties and applications
Rede de Química e Tecnologia
2011-2023
University of Lisbon
2023
Universidade Nova de Lisboa
2023
Raiz - Instituto De Investigação Da Floresta E Papel
2023
Universidade do Porto
2011-2015
Faculty (United Kingdom)
2015
Engineering (Italy)
2015
University of Minho
1989
The Kraft pulp industry is a relevant industrial sector in many countries with considerable social, economic, and environmental impact. Thus, sustainability the adequate framework to address this activity sector. This work presents review of literature, particular focus on bleaching area its relevance reducing water use. reports most prominent paper companies were analyzed, considering their specific utilization targets they have outlined. industrially applied sequences also addressed stages...
Acetic acid at concentrations as may occur during vinification and other alcoholic yeast fermentations induced death of glucose-grown cell populations Saccharomyces cerevisiae IGC 4072 temperatures which thermal was not detectable. The Arrhenius plots specific rates with various acetic (0-2%, w/v) pH 3.3 were linear could be decomposed into two distinct families parallel straight lines, indicating that types death: (1) High enthalpy (HED) predominated lower (> 0.5%, higher temperatures; its...
Different Chiral Ionic Liquids (CIL) based on L-proline have been developed. Simple and efficient synthetic methodologies are used, allowing preparation in good yields for twelve novel CILs using as a cation or anion combined with suitable counter-ions. A detailed physical chemical characterization of the was performed to evaluate influence counter-ions final properties. The most promissory were tested chiral catalysts IL media asymmetric Michael addition reactions ketones aldehydes...
Abstract The ready biodegradability of four chelating agents, N,N′-(S,S)-bis[1-carboxy-2-(imidazol-4-yl)ethyl]ethylenediamine (BCIEE), N′-ethylenedi-L-cysteine (EC), N,N′-bis (4-imidazolymethyl)ethylenediamine (EMI) and 2,6-pyridine dicarboxylic acid (PDA), was tested according to the OECD guideline for testing chemicals. PDA proved be a readily biodegradable substance. However, none other three compounds were degraded during 28 days test. Chemical simulations performed in order understand...
Protonation constants of 1,3-bis(tris(hydroxymethyl)methylamino)propane (BTP) and the complexes formed between BTP Co(II), Ni(II), or Zn(II) metal ions have been studied by glass electrode potentiometry (GEP) in aqueous 0.1 mol·L–1 KNO3 supporting electrolyte at 25 ± °C. The complexation model for each M(II)–BTP system was established. proposed final Ni(II)–BTP is: NiL, NiLH–1, NiLH–2, with stability constant values, as log β, 7.13 0.02, −1.32 0.04, −10.81 0.05, respectively. For Co(II)–BTP...
Hydrogen buffers are important in biological studies, as a steady hydrogen concentration is of great importance most scientific studies. One these 1,3-bis(tris(hydroxymethyl)methylamino)propane (BTP), which, considering its structure, has complexing capabilities, previously shown for other metals. In order to know the stability constants Cd(II) or Pb(II) with BTP, glass electrode potentiometry and direct current polarography studies were carried out. Our results show that both metals form...
Abstract This study investigates the role of secondary condensates in pulp and paper industry’s journey to minimize its water footprint. The integration condensates, traditionally less explored bleaching processes, is examined for potential reducing freshwater demand. Condensates with different organic content (chemical oxygen demand, COD) their mixtures were tested as washing liquid after alkaline extraction stage ( E P ) eucalyptus globulus kraft compared hot water. Two subsequent chlorine...
In this work, complexation between lead ion and the ligands 3-[N,N-bis(2-hydroxyethyl)amino]-2-hydroxypropanesulfonic acid (DIPSO) N-(1,1-dimethyl-2-hydroxyethyl)-3-amino-2-hydroxypropanesulfonic (AMPSO), which are commercial pH buffers, is presented. Both form complexes with in their buffer range (between 6.5 8.5 for DIPSO 8.0 9.0 AMPSO). The final models overall stability constants, reported here, were determined by direct current polarography glass electrode potentiometry [only...