Removal and Release of the 2,4,5-Trichlorophenoxyacetic Acid Herbicide from Wastewater by Layered Double Hydroxides

Highly Efficient Removal of 2,4,5-Trichlorophenoxyacetic Acid by Adsorption and Photocatalysis Using Nanomaterials with Surface Coating by the Cationic Surfactant

“…pH has an important influence on 2,4,5-T adsorption because the protonation-dependent surface charge and adsorbate protonation play key roles in determining 2,4,5-T binding behavior. Since the p K a of 2,4,5-T is about 2.9, 2,4,5-T exists mainly as anions at pH > 2.88. ,, In addition, the charge of CCTN is much more positive than that of TiO 2 NPs at all pH values. Figure indicates that the lower the solution pH is, the higher 2,4,5-T removal is.…”

“…Since the pK a of 2,4,5-T is about 2.9, 2,4,5-T exists mainly as anions at pH > 2.88. 6,35,36 In addition, the charge of CCTN is much more positive than that of TiO 2 NPs at all pH values. Figure 2 indicates that the lower the solution pH is, the higher 2,4,5-T removal is.…”

Recent Progress of Layered Double Hydroxide-Based Materials in Wastewater Treatment

“…The removal of atrazine was up to 74.8%, and the adsorption mechanisms could be determined by π-π interactions occurring at the interfaces by hydrogen bonding and pore-filling effect. Mourid et al [ 80 ] prepared the Zn 2 Al-LDH by coprecipitation at a constant pH, which has been used to remove 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) herbicide. The removal rate reached 96% for an optimal molar ratio 2,4,5-T/Cl = 0.5.…”

Antibacterial and Photocatalytic Activities of LDH-Based Sorbents of Different Compositions

“…In addition to their affinity to both cations and anions, LDHs as sorbents also have a very interesting peculiarity: they proved to be likewise efficient in the abatement of organic polluting compounds, including dyes, pesticides [13] and pharmaceuticals [14], the latter representing a crucial subset of emerging contaminants affecting developing countries, where a high concentration of antibiotics have been detected in soils and water [15]. In the comprehensive survey presented by [16] about correlations between the structure and sorption efficiency of LDHs, authors pointed out that the main processes governing the adsorption of organic pollutants are based on outer surface sorption and interlayer anion exchange, having a basic role in the presence of anionic molecules like Methyl Orange (MO), which can be assumed as a sort of prototypical dye in the current literature on the topic.…”