Simultaneous adsorption of Cu(II) and SO42− ions by a novel silica gel functionalized with a ditopic zwitterionic Schiff base ligand

Efficient simultaneous removal of Cu(II) and Cr2O72− from aqueous solution by a renewable amphoteric functionalized mesoporous silica

“…7, it was clear that the weight losses occurred at two different temperature ranges for A-SBA-15. The first weight loss of 3% in the 30-100°C interval was attributed to physisorbed water molecules released, and a second weight loss of 2% from 100°C to 800°C was associated with the condensation of silanol groups bonded to the silica surface [41]. For AG-SBA-15, there were three different stages of weight losses in the TGA curve: (1) The first weight loss of 2.5% in the 30-150°C range was also associated with the loss of adsorbed and bound water [3].…”

Enhanced adsorption of cadmium ions by 3D sulfonated reduced graphene oxide

“…Several technologies such as electrodialysis, ion exchange, reverse osmosis, ultrafiltration, chemical precipitation, biosorption and adsorption have been proposed for the removal of metal ions from wastewaters [8][9][10][11][12][13][14][15].…”

Adsorption kinetic, equilibrium and thermodynamic investigations of Zn(II) and Ni(II) ions removal by poly(azomethinethioamide) resin with pendent chlorobenzylidine ring

“…The salts such as ZnSO 4 stock solution. The pH of the test solution was adjusted to the required value with 0.1 N NaOH or 0.1 N HCl.…”

“…Adsorption remains to be the most popular technique due to its fl exibility and simple in design, convenience and ease of operation and higher effi ciency in removing heavy metal ions especially at lower concentration. Various adsorbents were employed for the removal of metal ions from the aqueous solutions which includes surface modifi ed Strychnos potatorum seeds 2, 13 , bael tree leaves 8- 9 , cashew nut shell 10-11 , unmodifi ed [4]arene 26 and etc. The objective of the present research is to develop an effective polymeric material with maximum adsorption capacity for the removal of Zn(II) and Ni(II) ions from the aqueous solution.…”