Trimethylamine functionalized radiation-induced grafted polyamide 6 fibers for p-nitrophenol adsorption.

The method of pre-irradiation grafting was used with the aid of electron beam (EB) accelerator to accomplish the grafting of polyamide 6 fibers (PA6) with glycidyl methacrylate (GMA). The extent to which GMA was grafted on PA6 was found to be markedly influenced by the absorbed dose of radiation and the reaction time of grafting. Trimethylamine (TMA) was afterwards employed for the functionalization of GMA-grafted fibers (PA6-g-GMA).

Insights into the -nitrophenol adsorption by amidoxime-modified poly(acrylonitrile--acrylic acid): characterization, kinetics, isotherm, thermodynamic, regeneration and mechanism study.

This study performs an appraisal of the adsorptive capacity of amidoxime-modified poly(acrylonitrile--acrylic acid) or abbreviated as (AO-modified poly(AN--AA)) for the -nitrophenol (PNP) adsorption, from aquatic environments batch system. The AO-modified poly(AN--AA) polymer was developed with redox polymerization, and then altered by using hydroxylamine hydrochloride (HH). Tools used to describe the physicochemical and morphological characteristics of the AO-modified poly(AN--AA) were Fourier transform infrared (FTIR) spectroscopy, CHN elemental analysis, X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM).