Publications by authors named "J Vieillard"
Adsorption of Cr(VI) and phosphate anions by amino-functionalized palm oil fibers.
Environ Sci Pollut Res Int
October 2024
Article Synopsis
- This research introduced a new sustainable adsorbent called PF-Aq, made by adding amino groups to palm oil fibers (PF), which enhances its ability to remove phosphate and Cr(VI) ions from water.
- Experimental techniques confirmed the successful modification of the fibers, showing PF-Aq has a high adsorption capacity, with maximum values of 151.07 mg/g for phosphate and 206.08 mg/g for Cr(VI).
- The findings indicate PF-Aq is not only effective and recyclable but also cost-efficient, with optimal performance at pH 4.0 and different thermal behaviors during adsorption for the two ions.
In this study, we discuss the removal of fluoride from water through column adsorption methods using Al(OH)@AC as a functional granular activated carbon. The height of the bed, fluoride concentration, and flow rate are the experimental factors used to obtain the breakthrough curves. As the flow rate increased, the breakthrough and saturation times decreased.
View Article and Find Full Text PDFArticle Synopsis
- The study aimed to find the optimal method for creating an effective adsorbent from volcanic rock powder waste through alkaline fusion under various conditions.
- Nine samples were produced by adjusting temperature and the ratio of NaOH to volcanic rock, which were then tested for their ability to adsorb certain dyes and metal ions.
- The results showed that a temperature of 550 °C and a NaOH/volcanic rock ratio of 1 maximized the adsorbent’s capacity to remove contaminants, achieving high adsorption rates for dyes and metals.
Cocoa shell was modified whit sodium hydroxide (NaOH) and cationic surfactant cetyltrimethylammonium bromide (CTAB) to increase surface functionality, surface area, and positive charge density. The prepared adsorbent CC-OH-CTAB was used to remove indigo carmine (IC) and bromocresol green (BCG) dyes from water. The optimal pH for IC and BCG adsorption were 2 and 4, respectively.
View Article and Find Full Text PDFThe evolution of low-cost ecotechnologies in water treatment and purification is highly increased. Face to the growing global demand for eco-friendly water treatment materials, the non-valorized herb-based biomass covering a large area could be a promising alternative. Herbs (HB) are currently one of the cheapest biomasses.
View Article and Find Full Text PDF