Application of an easily water-compatible hypercrosslinked polymeric adsorbent for efficient removal of catechol and resorcinol in aqueous solution

Effect of the pH in the adsorption and in the immersion enthalpy of monohydroxylated phenols from aqueous solutions on activated carbons

“…Thus, there is major interaction between the catechol and the activated carbon: the effects of solubility and the hydroxyl group position increase the adsorption capacity for catechol, followed by hydroquinone and for resorcinol. A work with polimeric resins [28] shows that the adsorption of catechol is larger than resorcinol, as in this study, revealing the greater interaction between the adsorbent and catechol.…”

Recovery, concentration and purification of phenolic compounds by adsorption: A review

“…Exothermic adsorption was reported for pure phenolics onto ACs and polymeric resins (Otero et al, 2004;Wang et al, 2004;Cañizares et al, 2006;Pan et al, 2008;Huang et al, 2009a), agro-based adsorbents (Srihari and Das, 2008), and non-viable fungal biomass (Mathialagan and Viraraghavan, 2009). It was also observed for catechins (Lu et al, 2010), apple polyphenols and puerarin (Yang et al, 2009) onto polymeric adsorbents, for phenolics from industrial effluents onto fly ash and …”

Surface chemical modification on hyper-cross-linked resin by hydrophilic carbonyl and hydroxyl groups to be employed as a polymeric adsorbent for adsorption of p-aminobenzoic acid from aqueous solution

“…Hydrochloric acid and sodium hydroxide were applied to adjust the solution pH. Then the flask was shaken at a speed of 150 rpm at a desired temperature for about 24 h. After the adsorption system reached equilibrium, concentration of the equilibrium paminobenzoic acid solution was measured by UV spectrometry at a wavelength of 266.0 nm and the equilibrium adsorption capacity was calculated as [26]:…”

“…About 1.000 g of resin and 500 mL of p-aminobenzoic acid solution were introduced into a conical flask quickly and shaken at a speed of 150 rpm at 299, 309 and 319 K continuously. 0.5 mL of solution was sampled at different time intervals and concentration of the residual p-aminobenzoic acid was determined until adsorption equilibrium was reached, the adsorption capacity at contact time t was calculated as [26]:…”

“…Many literatures reported the synthesis of resins based on hydrogen bonding [23][24][25], and adsorption mechanism on basis of hydrogen bonding is usually clarified by thermodynamic or theoretical calculation [26][27][28]. To the best of our knowledge, direct evidence to testify hydrogen bonding between the resin and the adsorbate is little discussed [29].…”