Employment and performance of modified chitosan for the removal of copper ions and methylene blue in wastewater

Abstract

Exploring new and efficient adsorbents for the purification of water from heavy metals and organic waste to provide clean drinking water is highly demanded. Herein, the synthesis of polymeric materials based on grafting chitosan (Cs) by various acrylic monomers as acrylic acid (AA), 2‐acrylamide‐2‐methyl propane sulfonic acid (AMPS), and acrylamide (Am) namely S1, S2, or S3, respectively, using methylene bisacrylamide (NMBAm) as crosslinker was performed. The formed polymeric compound was characterized by utilizing Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X‐ray, and Brunauer–Emmett–Teller. It was determined that S2 possessed a higher specific surface area of 109.133 m2/g, which is higher than S1 (71.2553 m2/g) and S3 (62.8847 m2/g). The as‐prepared polymeric compounds were utilized for the removal of copper ions (Cu2+) and methylene blue (MB) from wastewater in the absence and presence of UV light irradiation. The kinetic study and the adsorption isotherms for the removal of Cu2+ and MB as organic pollutants using the as‐prepared polymeric compound were studied.

Poly(vinylidene fluoride‐hexafluoropropylene)/mesoporous graphitic carbon nitride composite membranes for photocatalytic methylene blue degradation and sensing applications

“…Several methods, such as oxidation process, 19 membrane filtration technique, 20,21 microbial technologies, 22,23 bio‐electrochemical degradation, 24,25 flotation, 26 coagulation, 27 flocculation, 28 absorption, 29 adsorption, 30 photodegradation, 31–33 thermal degradation, 34 and so on, are being used for the degradation of the dyes. However, due to the accessibility and simplicity of catalytic materials, photocatalytic degradation has garnered considerable interest 35–39 . The extensively used nano‐catalysts are Cu, 40,41 CdS, 42,43 ZnO, 44,45 TiO 2, 33,46–48 SnO 2, 49 and ZrO 2, 50 polymer‐based catalyst 32,51–54 or its composites 55 …”

Sodium alginate/polyethyleneimine/polydopamine@cellulose nanofiber composite aerogel as a novel adsorbent for Cr(VI) and dyes removal

“…Despite the rapid industrial development and growing urbanization, large amounts of industrial effluents were discharged into the environment, which threatens human health and ecosystem seriously 1,2 . Chromium, being abundant, finds widespread utilization in diverse industrial sectors, encompassing leather, textile, tanning, electroplating, metallurgy, and other industries 3 .…”