Nitro-oxidized carboxycellulose nanofibers from moringa plant: effective bioadsorbent for mercury removal

Abstract

Mercury contamination in drinking water is a worldwide problem due to its severely harming effects on the human body. A nanostructured natural bioadsorbent, carboxycellulose nanofiber extracted from raw moringa plant using the nitro-oxidation method (termed NOCNF), capable of effectively remediating this problem has been demonstrated. Nitro-oxidation is a simple approach that can extract carboxylated nanocellulose directly from raw biomass. In this study, the produced NOCNF contained a large density of carboxylate groups on the cellulose surface (0.97 mmol/g), capable of removing Hg 2+ ions by simultaneous electrostatic-interactions and mineralization processes. Using the Langmuir analysis, the adsorption results indicated that the highest Hg 2+ removal capacity of this NOCNF was 257.07 mg/g, which is higher than most of the reported values. The interactions between Hg 2+ and NOCNF were further characterized by Fouriertransform infrared spectroscopy (FTIR), scanning electron microscopy/energy dispersive

Emerging 3D printing technologies and methodologies for microfluidic development

“…100 Based on its abundant hydroxyl groups, cellulose can be chemically modified and crosslinked with other polymers. 101 Henriksson et al reported a new type of 3D scaffold composed of nanocellulose and hyaluronic acid with adipocytes. 102 After one week, the cell viability was still 95%.…”

Cellulose-Based Materials for Water Remediation: Adsorption, Catalysis, and Antifouling

“…Cellulose-based materials were reported for the adsorption of metal ions such as UO 2 2+ (Sharma et al, 2020a), As 3+ (Chen et al, 2019;Sharma S. K. et al, 2020), Cu 2+ (Qin et al, 2019), Cd 2+ (Movaghgharnezhad et al, 2020), Cr 6+ (Awang et al, 2019.;Reshmy et al, 2022), Pb 2+ (Hernández-Francisco et al, 2020;Sharma P. R. et al, 2021), and Hg 2+ (Chen et al, 2021). The functional groups of cellulose materials play an important role in the adsorption of metal ions.…”

Effective Thallium(I) Removal by Nanocellulose Bioadsorbent Prepared by Nitro-Oxidation of Sorghum Stalks

“…In this regard, we aim to demonstrate that nanocellulose can be an effective coagulant/adsorbent to remove the Tl(I) contaminant from water [ 26 ]. In our previous study, we demonstrated that carboxylated cellulose nanofibers (CNFs) are generally effective for heavy metal ions removal [ 27 , 28 , 29 , 30 , 31 , 32 ]. Furthermore, anionic CNF can also be converted into cationic CNF through surface modification to remove metal ions in the anionic form.…”