Removal of cadmium from aqueous solution by Nordmann fir (Abies nordmanniana (Stev.) Spach. Subsp. nordmanniana) leaves

Synthesis of γ-cyclodextrin/chitosan composites for the efficient removal of Cd(II) from aqueous solution

“…ln q e = ln K f + 1 n ln C e (8) where K f indicates adsorption capacity (mg/g) and n an empirical parameter related to the intensity of adsorption, which varies with the heterogeneity of the adsorbent. The greater the values of the 1/n, better is the favorability of the adsorption.…”

“…Adsorption is one of the best physicochemical techniques with many advantages like low cost, availability, profitability, ease of operation and efficiency is widely chosen for water treatment purposes [5]. Several adsorbents such as aluminum oxide [6], activated carbon prepared from coir pith [7], biosorbents [8,9] and polymeric materials [22], cyclodextrin was grafted with pyromellitic dianhydriden [23] and cross-linked carboxymethyl konjac glucomannan [24]. Several reports are available on the chemical modifications of the biomasses before they are usefully exploited as the adsorbents.…”

A solid phase extraction procedure for Fe3+, Cu2+ and Zn2+ ions on 2-phenyl-1H-benzo[d] imidazole loaded on Triton X-100-coated polyvinyl chloride

“…Preconcentration can solve the above two problems and leads to simplified heavy metal determination [9][10][11][12][13][14]. Solid phase extraction is a universal technique in this respect compared to the conventional liquid extraction [15][16][17][18]. Solid phase extraction is based on the utilization of a major constituent as bonded stationary phase immobilized with different ligand or functional group.…”

“…Solid phase extraction is based on the utilization of a major constituent as bonded stationary phase immobilized with different ligand or functional group. The nature of the functional group determines the phase selectivity for metal ion while the regeneration of the phase depends on polymer matrix [15][16][17][18][19].…”

PVC Coated with an Indole Derivative-Loaded Triton X-100: a New Sorbent for Cu, Zn and Mn Ions

“…The nature of the functional group determines the phase selectivity for the metal ion of interest while the regeneration of the phase depends on the polymer matrix [33][34][35][36][37]. Polyvinyl chloride (PVC)-coated analytical reagents possess some definite advantages [38].…”