A5066422165- Arsenic contamination and mitigation
- Plant Surface Properties and Treatments
- Electrohydrodynamics and Fluid Dynamics
- Heavy metals in environment
- Advanced oxidation water treatment
- Adsorption and biosorption for pollutant removal
- Botanical Research and Applications
- Iron oxide chemistry and applications
- Pickering emulsions and particle stabilization
- Fluoride Effects and Removal
- Surface Modification and Superhydrophobicity
- Water Quality and Pollution Assessment
- Heavy Metal Exposure and Toxicity
- Constructed Wetlands for Wastewater Treatment
- Horticultural and Viticultural Research
- Paraquat toxicity studies and treatments
- Postharvest Quality and Shelf Life Management
- TiO2 Photocatalysis and Solar Cells
- Petroleum Processing and Analysis
- Solar-Powered Water Purification Methods
- Wastewater Treatment and Reuse
- Cassava research and cyanide
- Odor and Emission Control Technologies
- Dye analysis and toxicity
- Wind Energy Research and Development
Universidade do Porto
2015-2024
The search for low-cost technologies arsenic removal from water is in high demand due to its human toxicity, even at low concentrations. Adsorption can be a cost-effective treatment technique if applied with inexpensive materials. Arsenic continuous by adsorption onto an alternative modified biosorbent, iron-coated cork granulates (ICG), was investigated this work. Results showed that most experimental parameters of breakthrough curves (BTC) depend on flow rate, bed height, pH, and initial...
The metalloids arsenic (As) and antimony (Sb) belong to the pnictogen group of periodic table; they share many characteristics, including their toxic carcinogenic properties; rank as high-priority pollutants in United States European Union. Adsorption is one most effective techniques for removing both elements desorption, further reuse, a part process make adsorption more sustainable feasible. This review presents current state knowledge on desorption from exhausted adsorbents previously...
This study evaluates the possibility of adding value to cork granulates, byproducts processing, by using them as biosorbents and precursors activated carbons. Activation was carried out impregnation with phosphoric acid followed pyrolysis under N2 flow. Furthermore, were treated a cationic surfactant carbons subject second propene objective improving hydrophobicity. Physico-chemical, textural, surface characterization materials employing, among others, adsorption isotherms, Fourier transform...
Arsenic is a toxic element for humans and major pollutant in drinking water. Natural anthropogenic sources can release As into water bodies. The countries with the greatest arsenic contamination issues lack affordable technology to attain maximum permitted concentrations. Adsorption be highly efficient low-cost option advanced treatment, development of new cheap adsorbents essential expand access safe concentration arsenic. This paper aims review state art adsorption from continuous mode...
This work investigated Sb adsorption–desorption using iron-coated cork granulates (ICG) in both batch and continuous modes to evaluate the materiaĺs adsorption regeneration performance, as well possibility of antimony recovery. A fixed-bed column filled with ICG, demonstrated maximum capacities 13 ± 2 mg g−1 10 1 for Sb(III) Sb(V), respectively, at pH 3. ICG was able remove within WHO guideline 20 μg/L 6. Among different classes eluents tested Sb(V) desorption, acids achieved highest...
Cork-based adsorbents have been gathering interest from the research community since 1990s. A first review was published on this topic in 2012. Still, last decade, novel activated carbons and biochars, multiple applications, produced using cork as a raw material. This presents these insights into properties of cork, its various forms, how they relate to adsorption capacity. Details new preparation methodologies respective characteristics cork-based biochars are thoroughly compared, patterns...
The chemical desorption of arsenic from saturated iron-coated cork granulates (ICG) and the regeneration capacity this adsorbent for further reuse was investigated in batch continuous modes. Different types eluents were tested at different concentrations evaluating their capacity, leaching total organic carbon (TOC), iron content, characterization by SEM/EDS used to assess eluents' attack on structure. NaOH 0.1 M solution achieved highest removal rate media; however, it aggressive structure,...
BACKGROUND This work presents a novel approach to the understanding of electrostatic phenomena and sorbate–sorbent interactions in oil sorption. The study focuses on sorption sunflower onto regranulated cork granules as promising natural sorbents. RESULTS It was shown that lowering pH caused neutralization negative surface charge by positive hydrogen ions, leading reduction value ζ-potential, further destabilization emulsion, an increase grease (O&G) uptake granules. effect ionic strength...