Poly(2-Furyl)Methylenesulfide as a Resin to Uptake of Metal Ions from Aqueous Solutions

Abstract

The polymerization of poly (2-furyl) methylenesulfide -POLYTHIOFURFURAL -was performed in an 0.36 mol/L aqueous solution of furfuraldehyde, saturated by bubbling hydrogen sulfide for 2 h at different temperatures. The reaction product was thoroughly washed and dried at 40 °C under vacuum. Poly (2-furyl) methylenesulfyde is a yellow powder with a rather unpleasant odor. The polythiofurfural obtained [ -CH(C4H3O)-S-] is a furan with thiols end groups. These are active adsorption centers for metal ions. The polythiofurfural was soluble in acetone and chloroform and its yields attained 80%. Morphological analysis by Scanning Eletronic Microscopy indicates a regular and dense surface in an interesting spacial arrangement. Preliminary isotherms adsorption studies indicate specific affinity forNi (II) and Co (II) and different capacity adsorption, 0.022 and 0.045 mmol per gram, respectively.