Arsenic adsorption from contaminated water on Fe(III)‐coordinated amino‐functionalized poly(glycidylmethacrylate)‐grafted TiO₂‐densified cellulose

Abstract

BACKGROUND: The main aim of this study is to determine the sorptive potential of a novel anion exchanger, Fe(III)‐coordinated amino‐functionalized poly(glycidylmethacrylate)‐grafted TiO2‐densified cellulose (AM‐Fe‐PGDC) for arsenic(V) removal from aqueous solutions by batch technique. RESULTS: The adsorbent was characterized using infrared spectroscopy, powder X‐ray diffraction, scanning electron microscopy, thermogravimetry and potentiometric titrations. The effective pH for removal was 6.0. The adsorption rate was influenced by initial metal ion concentration and contact time. The equilibrium was achieved within 1.5 h and follows a pseudo‐second‐order kinetic model. The adsorption capacity for As(V) calculated using the Langmuir isotherm equation was 105.47 mg g−1. The AM‐Fe‐PGDC developed was used to remove As(V) from simulated groundwater. Regeneration experiments were attempted for four cycles using 0.1 mol L−1 NaCl solution. CONCLUSION: It was found that AM‐Fe‐PGDC is very efficient for the removal of As(V) from aqueous solutions. © 2012 Society of Chemical Industry

Adsorption of Chlorendic Acid onto Hydrophilic Fumed Titanium Dioxide (P25)

“…Figure 6 shows preliminary results of chlorendic acid adsorption onto TiO 2 surface as a function of temperature. At the natural pH of the suspension, removal of chlorendic acid from aqueous solutions decreased with increase in temperature up to 40 o C. The drop in adsorption with increasing temperature is not unexpected since heat is typically evolved after bond formation between solute and adsorbent [28]. The reduction in the adsorption capacity of TiO 2 with increasing temperature (between 20 -40 o C) is consistent with that of perlite (a glassy volcanic rock material) [29].…”

“…Adsorption constant and maximum adsorbable quantity obtained for chlorendic acid at 20 o C were (0.12 ± 0.03) l/mg and (4.4 ± 0.2) mg/g TiO 2 4. Temperature increase from [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] o C reduces adsorption of chlorendic acid onto TiO 2 (P-25). 5.…”

Selective removal of Hg(II) from aqueous solution by functionalized magnetic-macromolecular hybrid material

“…A cross-linking treatment or a chemical modification is thus required for extending the pH field of application (for both 4 sorption and desorption steps). On the other hand, Glycidyl methacrylate (GMA) is an attractive vinyl monomer because of its low toxicity, lower cost compared with other acrylic monomers, versatile properties and especially due to the presence of epoxy group in its molecule [5], which makes it very reactive for chemical modification or for reacting with other materials. These polymers are potent sorbents for various transition metals [6,7].…”

“…The objective of this work consists in synthesizing a magnetic composite made of glycidyl methacrylate (GMA) and chitosan (coating the magnetic Fe 3 O 4 core) that is functionalized by grafting diethylenetriamine (DETA) through GMA (to increase the density of sorption sites 5 (and their potential selectivity). These composite materials are being tested for Hg(II) recovery through the study of pH effect, the investigation of competition effects (composition of the matrix: competitor metal ions, counter anions), the determination of sorption isotherms and thermodynamic characteristics and the identification of controlling steps in uptake kinetics.…”

Thermal regeneration of recyclable reduced graphene oxide/Fe3O4composites with improved adsorption properties

“…In order to adapt for the considered system, two appropriate isotherm models (Langmuir and Sips models) that can reproduce experimental results have been considered in the present study. 1,40 The amount of adsorbed MB was calculated using the following equation: 5,41…”