Publications by authors named "Aurora Robledo-Cabrera"
Synthesis of bifunctional nanostructured adsorbents based on anionic/cationic clays: effect of arrangement on simultaneous adsorption of cadmium and arsenate.
Environ Sci Pollut Res Int
June 2024
Article Synopsis
- This study explores the creation of hybrid materials using natural clays (bentonite, halloysite, and sepiolite) and layered double hydroxide (LDH), focusing on their ability to adsorb cadmium (Cd(II)) and arsenic (As(V)) simultaneously.
- Two synthesis methods—'in situ' and 'assembly'—were used, with 'in situ' producing a more uniform hybrid material due to the formation of LDH on the clay surface, showing notable ion exchange capacities.
- The hybrid materials demonstrated significantly enhanced adsorption of Cd(II) compared to the clays alone, with the most effective hybrid achieving a tenfold increase for As(V) adsorption, indicating a
Current challenges in froth flotation are the presence of complex gangues and the use of low-quality waters, such as seawater. In this scenario, the recovery of molybdenum minerals is difficult, mainly due to the hydrophobic faces' physicochemical changes. In the present study, the natural floatability of pure molybdenite was analyzed by using microflotation assays, and hydrophobicity was measured by performing contact-angle measurements.
View Article and Find Full Text PDFActivated carbon has been widely used to remove hazardous Cr(VI); however, the impact of CrO precipitate on gradually declining removal ability as pH increases has received little attention. Herein, to investigate the effect of CrO, SEM-EDX (scanning electron microscope-energy dispersive X-ray analysis) coupling elements mapping of chromium-loaded powdered activated carbon (PAC) revealed that a chromium layer was formed on the PAC exterior after being treated with Cr(VI) at pH 7. XPS (X-ray photoelectron spectroscopy) study confirmed that 69.
View Article and Find Full Text PDFTo enhance the inferior removal capability of aqueous Cr(VI) by commercial activated carbon under neutral conditions. The emerging ball milling technology was employed and the removal efficiency of Cr(VI) by ball-milled highly activated carbon (HAC) increased from 68.3% to 99.
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