Hydrothermal carbonization of distillers grains with clay minerals for enhanced adsorption of phosphate and methylene blue

Simple Alkali-Modified Persimmon Peel–Montmorillonite Composite Hydrochar for Rapid and Efficient Removal of Methylene Blue

“…The abundant oxygen-containing groups on the surface of the hydrochars provided adsorption sites for the sequestration of MB. Moreover, the presence of peaks attributed to C-O/Si-O [34,35] and Si-O-Al/Si-O-Si [36] at 1034 cm −1 and 529 cm −1 /468 cm −1 , respectively, confirms the successful assembly of montmorillonite and biomass during the hydrothermal processes. After the hydrochar was treated with NaHCO 3 and KOH, the stretching vibrations of the absorption peaks attributed to -OH and C=C/C=O (1614 cm −1 ) were enhanced, while the stretching vibration attributed to C=O (1702 cm −1 ) was weakened.…”

Microwave assisted and conventional hydrothermal treatment of waste seaweed: Comparison of hydrochar properties and energy efficiency

“…shown by several studies (Li et al, 2019a;Lv et al, 2022;Xu et al, 2021). The presence of hydroxyl groups on the hydrochar surface and shifts in the O-H and C=N stretching vibrations of the dye and hydrochar confirm hydrogen bond interactions, while shifts in the C-N stretching vibration of the dye suggest electrostatic interactions also play a role.…”

Synthesis of bagasse-derived carboxymethyl cellulose aerogels for efficient removal of cationic dyes and heavy metal ions

“…The adsorption of Pb( ii ) involves multiple mechanisms, such as electrostatic attraction, ion exchange, and chelation, which control the adsorption process. 45 MB can be easily adsorbed on the surfaces through ion exchange, van der Waals forces, and hydrogen-bonding interactions. 46 Cellulose was etherified to access a large number of carboxyl groups, which greatly improved the adsorption capacity of BCGel for Pb( ii ) and MB, and the stability of the adsorbent was improved by CA esterification.…”