Novel porous organic triazine‐based polyimide with high nitrogen levels for highly efficient removal of Ni(II) from aqueous solution

Abstract

In this study, a porous organic triazine-based polyimide (PPI network) was prepared from 2,4,6-tris(hydrazino)-s-triazine and 3,4,9,10-perylenetetracarboxylic dianhydride. TGA, Fourier transform infrared spectroscopy, field emission SEM, XRD and a nitrogen sorption study confirmed the PPI network structure. Then, the synthesized PPI network was used to evaluate Ni 2+ ion removal from aqueous solution and the effective parameters on adsorption functions of Ni 2+ ions such as initial concentration, contact time and pH of the solution in batch adsorption experiments was studied. The results showed that the maximum adsorption capacity (q m ) of Ni 2+ ions was 36.1 mg g −1 in only 30 min with a pH of 7. The kinetics and adsorption isotherm were identified to be better fitted by the pseudo-second-order model and the Langmuir model, respectively. Based on the results, the proposed adsorbent has good potential for removing Ni 2+ ions from aqueous solutions.

An amine-rich porous organic polymer with flexible diarylmethane moieties for adsorptive removal of anionic dyes

“…23 POPs are a relatively young class of porous materials with excellent and unique properties, including ease of functionalization, adjustable porosity, and structural diversity. 23,24 POPs' properties made them have potential applications in optoelectronics, 25,26 gas storage and separation, [27][28][29][30][31][32] adsorption, [33][34][35] and catalysis. [36][37][38][39] More importantly, the adsorption properties of POPs can be easily improved by post-synthetic modifications, heteroatom-containing building blocks, and generating constricted pores.…”

Polybenzimidazole membrane for efficient copper removal from aqueous solutions

“…Polymers are advantageous and versatile absorbent materials, the use of ion exchange resins being one of the most developed and widely applied methods. The presence of anionic active sites in their structure, like sulfonates, carboxylates or N‐heterocycles, allows them to exchange metal cations 11–19 . These polymers have pairs of free electrons that allow them to conjugate with positively charged metal ions 20 .…”

“…The presence of anionic active sites in their structure, like sulfonates, carboxylates or N-heterocycles, allows them to exchange metal cations. [11][12][13][14][15][16][17][18][19] These polymers have pairs of free electrons that allow them to conjugate with positively charged metal ions. 20 Likewise, using them in thin films or membrane form shows certain additional benefits in terms of easier collection, operation and handling; they do not dissolve, generate a lower environmental impact and are sludge-free.…”

Advanced hybrid membranes for efficient nickel retention from simulated wastewater

“…48 In another study nickel ions were removed using a porous organic triazine-based network, developed from 2,4,6-tris(hydrazine)-s-triazine and 3,4,9,10perylenetetracarboxylic dianhydride. 49 Zahra et al describe the amendment of metal-bearing water using crosslinked polyamides as adsorbents. 50 Fruit stones, a kind of agricultural byproduct, have also received attention as additives.…”