Chemically-Crosslinked Xylan/Graphene Oxide Composite Hydrogel for Copper Ions Removal was written by Sun, Xiao-Feng;Xie, Yangyang;Shan, Shuang;Li, Wenbo;Sun, Le. And the article was included in Journal of Polymers and the Environment in 2022.Category: chlorides-buliding-blocks The following contents are mentioned in the article:
The chem.-crosslinked composite hydrogel based on acylated xylan and silanized graphene oxide was prepared via free radical polymerization as a novel adsorbent for the removal of Cu2+ ions from aqueous solution The chem. structures and morphologies of the silanized graphene oxide and acylated xylan as well as the prepared hydrogels were characterized by FT-IR, XPS, SEM and TEM. The swelling ratios of the prepared hydrogels were determined, and the results showed that the chem.-crosslinked hydrogel was pH-sensitive, and the swelling kinetics of the hydrogels followed Schott second-order kinetic. The optimum pH for the adsorption of Cu2+ ions onto the chem.-crosslinked composite hydrogel was found at the value of 5 and the maximum adsorption amount of Cu2+ ions was evaluated to be 228 mg/g. The adsorption isotherm accorded with the Freundlich model, and the pseudo-second order kinetic model was suitable to describe the adsorption process. The study of adsorption thermodn. indicated that the adsorption of Cu2+ ions onto the chem.-crosslinked composite hydrogel was endothermal and spontaneous, and the adsorption amount rose with an increase in temperature In addition, higher desorption percentages of Cu2+ ions from the used hydrogel were also achieved (77.3% after recycling for 6 times). All obtained results indicated that the prepared chem.-crosslinked hydrogel is promising for water treatment and collection of metal ions. This study involved multiple reactions and reactants, such as Lithium chloride (cas: 7447-41-8Category: chlorides-buliding-blocks).
Lithium chloride (cas: 7447-41-8) belongs to organic chlorides. Chlorination modifies the physical properties of hydrocarbons in several ways. These compounds are typically denser than water due to the higher atomic weight of chlorine versus hydrogen.While alkyl bromides and iodides are more reactive, alkyl chlorides tend to be less expensive and more readily available. Alkyl chlorides readily undergo attack by nucleophiles.Category: chlorides-buliding-blocks
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics