Adsorption processes in biopolymer systems: fundamentals to practical applications

Pyridinium-furfuryl-modified granular agro-waste adsorbent for orthophosphate recovery

“…14 mg g −1 at elevated concentrations could be reached with unmodified pellets, these concentrations are rarely environmentally relevant, where the orthophosphate concentrations generally do not exceed 2–5 mg L −1 . 44–47 Herein, the furfural-modified composites exhibit a steep rise at low orthophosphate concentrations comparable or exceeding that of unmodified pellets. Notably, the NaOH and ECH modified pellet systems did not display appreciable adsorption at all for such environmentally relevant conditions.…”

Current trends in the synthesis, characterization and application of metal-organic frameworks

“…, electrostatic interactions, hydrophobic effect, hydrogen bonding, π–π bonding, and covalent bonding. 149 These interactions may arise from the inherent properties of the adsorbent. MOFs have attractive properties based on the metal centers and ligand functionalities which make them exhibit one or more of these interactions with toxic pollutants leading to adsorption of the pollutants.…”

Enhanced removal of toxic Cr(vi) and Pb(ii) from water using carboxylic terminated Ti3C2Tx nanosheets

“…The kinetic study of MI adsorbates and Ti 3 C 2 T x adsorbent was incorporated with pseudo-rst-order (PFO) and pseudo-secondorder (PSO) reactions by following eqn (3) and ( 4), respectively. The linear PFO and linear PSO models 59,60 were implemented for adsorption kinetics analysis. Here, q e and q t are the corresponding adsorption capacities (mg g −1 ) of Ti 3 C 2 T x nanosheets at equilibrium and time t. Likewise, k 1 and k 2 are the respective rate constants of PFO and PSO reactions.…”