Preparation of a novel chitosan-based magnetic adsorbent CTS@SnO2@Fe3O4 for effective treatment of dye wastewater

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

“…Crosslinking chitosan was also reported by Cui et al [154] who mixed iron oxide (Fe3O4) (average size, 20 nm) and tin oxide (SnO2,) (average size, 50-70 nm) nanoparticles in crosslinked chitosan. The presence of the two nanoparticles enabled the maximum adsorbance capacity of reactive brilliant red of the composite to be raised close to unity (981.23 mg.g −1 ).…”

“…(1) The use of nanomaterials enables a high degree of economy for the use of materials for the removal of various contaminants from water. Within the course of the review, we have highlighted examples of near-to-or above-unity-adsorption of contaminants such as have been reported for layered double hydroxides [75] and layered double oxides [74] containing composites, nickel, magnesium-and-zinc-ferrite nanoparticles [40], and chitosan with tin oxide [154] all of which can adsorb a large quantity of contaminants in a short period of time. Linked with the ability to be retained with a magnetic field and then reused over multiple cycles, it appears that only a small quantity of this class of nanomaterial would be necessary for remediating a large volume of water.…”

2-Mercaptobenzimidazole derivative of chitosan for silver sorption – Contribution of magnetite incorporation and sonication effects on enhanced metal recovery

“…This phase corresponds to the depolymerization of the biopolymer and the char formation. The last section corresponds to the char degradation and to the phase transition of Fe 3 O 4 to α-Fe 2 O 3 (up to 630°C) [51]. For RII, the phase transition of magnetite is probably associated with the valley observed at 531.73°C; this valley almost masks the two valleys observed at 487°C and 552.36°C for RI.…”

Chitosan biopolymer based nanocomposite hydrogels for removal of methylene blue dye

“…The effluent dye industry has caused severe hazards to the environment and biology due to its complex structure and chromogenic functional groups [1][2][3]. Among many pollutants that the mill discharges millions of gallons into the water contain naphthol, vat dyes, sulfur, nitrates, acetic acid, chromium compounds and heavy metal ions like arsenic, lead, cadmium, copper, and many other pollutants [4][5][6]. Most of these contaminants are hydrocarbon-based softeners, formaldehyde-based dye fixing agents and nonbiodegradable dyeing chemicals [1,2,6].…”

“…Among many pollutants that the mill discharges millions of gallons into the water contain naphthol, vat dyes, sulfur, nitrates, acetic acid, chromium compounds and heavy metal ions like arsenic, lead, cadmium, copper, and many other pollutants [4][5][6]. Most of these contaminants are hydrocarbon-based softeners, formaldehyde-based dye fixing agents and nonbiodegradable dyeing chemicals [1,2,6]. Methylene blue dye (MB) is harm to the respiratory system and skin.…”