Preparation, characterization and adsorption properties of a novel 3-aminopropyltriethoxysilane functionalized sodium alginate porous membrane adsorbent for Cr(III) ions

Removal of zinc and lead from aqueous solution by nanostructured cedar leaf ash as biosorbent

“…FTIR spectrum after adsorption shows that wave numbers and the intensity of some peaks are shifted or substantially lower than those before adsorption. An absorption band around 3375.64 cm − 1 corresponding to O-H or N-H groups is shifted to 3326.37 cm −1 after adsorption of Pb 2+ and 3232.51 after adsorption of Zn 2+ , which may be ascribed to the complexion of OH and amide groups with metals ions [37][38][39][40]. The peaks at 1615.9 cm − 1 , 1631 cm − 1 and 1649.89 cm − 1 may be attributed to C_O stretching vibration [40][41][42][43][44].…”

Highly effective removal of Cu(II) by triethylenetetramine-magnetic reduced graphene oxide composite

“…In contrast, adsorption is one of the most promising treatments for the removal of metal ions because it is simple, cost-effective, and extensively used [11][12][13]. Some adsorbents, such as chitosan [14][15][16] and sodium alginate [17], have been extensively studied for their ability to remove heavy metal ions from aqueous solutions. Although these new types of adsorbents have shown promise in treating wastewater, some limitations still exist, such as complicated procedures and low adsorption capacity.…”

Porous Polyelectrolytes: The Interplay of Charge and Pores for New Functionalities

“…Chen and co‐workers prepared negatively charged porous polyacrylonitrile polymers with improved adsorption capacities for Hg 2+ , Ag + , and Cu 2+ 73. Encouraging results were also obtained with porous sodium alginate, which exhibited a high adsorption capacity of 90.0 mg g −1 for Cr III ions 74. In addition to aqueous adsorption, porous PILs show improved performance in the removal of pollutants from organic solvents35b, 68b and the adsorption of CO 2 46a, 68, 71.…”