Oxidized Carbonized Cellulose-Coated Filters for Environmental Contaminant Adsorption and Detection

Abstract

Cationized cellulose filters with coating of oxidized carbonized cellulose (OCC) were successfully fabricated. The OCC-coated filter was demonstrated as a combined surface for adsorption of environmental contaminants and their detection on the filter by surface-assisted desorption ionization-mass spectrometry (SALDI-MS). The cellulose filters were cationized by utilizing 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHTAC) and sodium hydroxide. It was shown that the degree of substitution increased with the CHTAC feed. OCC, synthesized by hydrothermal carbonization of cellulose with subsequent oxidation and dialysis, was attached onto the cationized filters by electrostatic interactions. The filters adsorbed the model contaminant methylene blue (MB) from aqueous solution, and the MB could subsequently be detected on the filter surfaces by SALDI-MS as [M] + adduct. The OCC coating further improved the relative peak intensity of [M] + with little background interferences. This work indicates great potential for the OCC-coated filters as a combined surface for rapid monitoring of environmental contaminants.

Triggering Degradation of Cellulose Acetate by Embedded Enzymes: Accelerated Enzymatic Degradation and Biodegradation under Simulated Composting Conditions

“…5,33 Amine groups and inorganic compounds in IL might also facilitate carbonization. 34,35 While CA and CA/IL 3% followed a similar trend with aging time, a different behavior was observed in the case of faster degrading CA/IL 5%. Initially, increasing the IL constituent increased the residue at 700 °C from 19% for CA and 26% for CA/IL 3% to 47% for CA/IL 5% (Figure 3e,f).…”

“…Another significant change was the increase in the amount of residue from 10% after 7 days to 52% after 40 days for CA and from 15 to 62% for CA/IL 3%. In earlier studies, increased residues after thermal degradation of CA were reported both after crosslinking and after molecular weight reduction and deacetylation. , Amine groups and inorganic compounds in IL might also facilitate carbonization. , …”

Novel Mesoporous Lignin-Calcium for Efficiently Scavenging Cationic Dyes from Dyestuff Effluent

“…Activated carbon nanofiber was fabricated from coconut shell charcoal through electrospinning and iodine treatment for methylene blue (MB) adsorption . As reported by Adolfsson et al, cellulose was carbonized, oxidized, and connected with filters for removal of MB . A hierarchical 3D porous carbon was developed by Liu et al from lotus leaves for capturing rhodamine B .…”

“…12 As reported by Adolfsson et al, cellulose was carbonized, oxidized, and connected with filters for removal of MB. 13 A hierarchical 3D porous carbon was developed by Liu et al from lotus leaves for capturing rhodamine B. 14 However, many of them were yet below the desired requirement, inevitably gotten drenched by small surface area, sluggish adsorption rate, and poor reusability.…”