Removal of vanadium (IV) from water solution by sulfated Katira gum-cl-poly (acrylic acid) hydrogel

Electrochemical Selective Recovery of Heavy Metal Vanadium Oxyanion from Continuously Flowing Aqueous Streams

“…Vanadium is a toxic heavy metal, widely used across am ultitude of industries-smelting, foundry,t extile, ceramic, glass, and refinery to name af ew. [1,2] Vanadium can mostly be foundi nt hree oxidation states, + 3, + 4a nd + 5, with multiple species co-existing across the pH and potential (E H )l andscape. [3] Under most conditions vanadium(V)o ccurs as vanadate(V) oxyanion (H 2 VO 3 À / HVO 4 2À ), whereas the oxycation of the same oxidation state (VO 2 + )c an form under highly acidic conditions.…”

“…Continuous discharge of pollutants and wastewater into water sources causes serious health issues and leads to irreversible environmental impacts. Vanadium is a toxic heavy metal, widely used across a multitude of industries—smelting, foundry, textile, ceramic, glass, and refinery to name a few . Vanadium can mostly be found in three oxidation states, +3, +4 and +5, with multiple species co‐existing across the pH and potential ( E H ) landscape .…”

Simultaneous Electrochemical Sensing of p‐Aminophenol and Hydroquinone by Using Grafted Tricholoma Mushroom Polysaccharide/Gold Composite Nanoparticles in Aqueous Media

“…The peak at 1654 cm −1 corresponds to the ‘C−C’ stretching vibration present in the TMP backbone . However after grafting with a mixture of AM and AA to the TMP backbone a prominent new peak at 1732 cm −1 (Figure b) is arised, that corresponds to the ‘C=O’ stretching vibrations of acid (‐COOH) moieties and the peak at 1630 cm −1 (Figure b) for the stretching vibrations of amide groups (>CO‐NH 2 ) . The appearance of the new peak at 1732 cm −1 , 1630 cm −1 in Figure b clearly indicates the grafting of poly AA and poly AM chains onto the TMP backbone.…”

Current Understanding of the Applications of Photocrosslinked Hydrogels in Biomedical Engineering

“…Acrylic-acid (AA) molecules have photoactive groups and good water solubility, and due to the free carboxyl structure remaining after polymerization, theycan swell or shrink with environmental pH changes, electric fields, enzyme reactions, and temperature, so that the hydrogel exhibits a tunableresponse. In addition, these free carboxyl groups can interact with other groups under certain conditions, so the hydrogel network can be functionalized by reactions with carboxyl groups or interactions with solutes [23][24][25][26]. Therefore, photocrosslinked hydrogels based on AA molecules are very common and are often used for biological adsorption and environmental purification.…”