Synthesis of chelate resins derived from furfural and their adsorption properties for metal ions

Abstract

A series of new chelate resins were synthesized by ring-opening polycondensation of the reaction mixture of furfural with diethanolamine, using sulfuric acid as a catalyst, and the resulting chelate resins were employed in the adsorption for metal ions Bi, In, Sn, V, Ga, Y, Ti, and Pb. The composition, structure, and properties of the resulting chelate resin were studied by means of fourier transform infrared (FTIR), electron paramagnetic resonance spectrum (EPR), and elemental analysis methods. Meanwhile, the adsorption properties of the resulting chelate resins for the above metal ions were investigated by inductively-coupled plasma-atomic emission spectrometry (ICP-AES) procedures. The results show that the resulting chelate resins hold the structure consisting of hydroxyl groups, amine groups, and conjugated bonds, as well as more crosslinkages, and so they exhibit a good reactivity and chemical stability. The adsorption experiments show that the chelate resins could well adsorb V, Ga, Y, Ti, and Pb in a wider acidity range and exhibit a good adsorption selectivity. Particularly, the chelate resins could adsorb and desorb for Pb, Bi, In, V, Y, and Ti ,quantitatively, in the given conditions.

A Solution-Based Anisotropic Template Route to Triangular Pyramid Shells

“…The ascorbic acid gradually dissolves in ethanol and coats on the template’s surface for its superior coordination with metal ions . The ascorbic acid (AA) decomposes to form furfural molecules under the catalysis of Fe 3+ (main product), which self-polymerize with the aldehyde groups, and chelate with Fe 3+ species. , The free Fe 3+ species in solution synchronously incorporate into the polymer. Because of the different surface states of the base and side face of the template, the ascorbic acid molecules only coat the side faces, forming the core/half-shell structures (Figure S4, Supporting Information).…”

Adsorption of Pb(II) by N-methylimidazole modified palygorskite

“…Heavy metal ions in wastewater mainly come from painting, coal combustion, mining activities, tanneries and battery manufacturing [1,2]. Owning to the fact that heavy metal ions are not biodegradable in nature, which means that they can be accumulated in the organism body and further endanger the health of human beings through food chains [3], they must be removed from the wastewater. Various technologies, such as precipitation, ion exchange, solvent extraction and reverse osmosis are the common methods of removing heavy metal ions from aqueous solutions [4][5][6][7], but these methods are either costly or inefficient.…”