Adsorption of Cu(II) from Aqueous Solutions by Ammoniated Cotton Fiber

Abstract

This study describes the preparation of a novel chelating cotton fiber adsorbent, ammoniated cotton fiber (ACF), which was prepared by modifying cotton fiber with amino-HBP using glutaraldehyde as a cross-linking agent. This new adsorbent was characterized and analyzed for amine content, and by scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The capacity of ACF to adsorb Cu(II) from aqueous solution was evaluated at different pHs, contact times and initial metal ion concentrations. The results showed that ACF was effective in removing of Cu(II) from aqueous solutions and the adsorption amount of Cu(II) reached 16.7374 mg g-1. The adsorption isotherm and kinetics were well fitted to the Langmuir model and the pseudo-second-order model, respectively. The adsorption amount calculated using the pseudo-second-order model was in good agreement with the experimental data.

Use of natural fibers in alternative wastewater treatment technologies, aiming at a more sustainable production: A review

“…Batool e Valiyaveettil (2021) e Sathasivam et al (2021) desenvolveram um adsorvente ecologicamente correto, não tóxico para o tratamento de água a partir da fibra de bananeira, sendo um com a remoção de nanopartículas de polímero e o outro trabalho com a remoção de Outros trabalhos avaliaram remoção de metal em ambiente aquoso por fibras naturais, como o uso da casca de pequi, fibra de algodão e fibra do coco na remoção de íons de cobre (II), fibras de bambu, pseudocaule de banana e bucha vegetal na remoção de Cr(VI), fibras de juta e de coco na remoção de Hg2+ e Pb2+, fibra de coco na remoção de arsênio, evidenciando a importância da adsorção de metais, com um alto poder de contaminação da água e sua biota (ANIRUDHAN; UNNITHAN, 2007;HASSAN;ZOHDY, 2018;MENEZES et al, 2021;NWOSU-OBIEOGU;OKOLO, 2020;PARAMASIVAM, 2020;QUEK;DURI, 2007;XUE et al, 2021;ZANG, 2016) Em relação aos tipos de fibras naturais utilizadas nos artigos de adsorção encontrados, o resultado é apresentado na Figura 5.…”

Glutaraldehyde cross-linked CDA/HBP-NH2nanofiber membrane for adsorption of heavy metal ions in wastewater

“…Zang 26 et al used spun CDA nanofibers as raw materials. After argon plasma treatment, a large number of active free radicals were formed on the surface of CDA nanofibers.…”

Speciation of arsenic using sulfur containing ligand and cotton wool by ICP-OES

“…Amino groups were another type of ligand that had been used for metal speciation. Zang et al [36,37] prepared a sorbent by grafting aminoterminated hyperbranched polymer to cotton fibers and used it to adsorb heavy metal ions. The adsorption capacity obtained for Cu(II) and Pb(II) were up to 16.1 mg g -1 and 13.4 mg g -1 respectively.…”

“…Even a little amount of cotton wool (0.1 g) could adsorb most As(III) in the solution. This efficient adsorption may be accredited to the high surface area of cotton which in turn increase the rate of adsorption [37]. Meanwhile, the As(V) still could not be retained on the cotton column regardless of its mass.…”

“…At flow rates of 1 -5 mL min -1 , the adsorption percentages of As(III) on cotton wool were very similar. It was probably due to the high surface area of the cotton wool [37] that the adsorption of As(III) -APDC complex could be achieved relatively quickly. So, to complete the analysis in a shorter time, the flow rate of 5 mL min -1 was selected as the optimal adsorption flow rate.…”