Enhancing adsorption of heavy metal ions onto biobased nanofibers from waste pulp residues for application in wastewater treatment

Abstract

Biobased nanofibers are increasingly considered in purification technologies due to their high mechanical properties, high specific surface area, versatile surface chemistry and natural abundance. In this work, cellulose and chitin nanofibers functionalized with carboxylate entities have been prepared from pulp residue (i.e., a waste product from the pulp and paper production) and crab shells, respectively, by chemically modifying the initial raw materials with the 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) mediated oxidation reaction followed by mechanical Keywords Cellulose Á Chitin Á Biobased nanofibers Á Heavy metal ions removal Á Purification technology Electronic supplementary material The online version of this article (

Nanocelluloses and their phosphorylated derivatives for selective adsorption of Ag+, Cu2+ and Fe3+ from industrial effluents

“…Activated carbon is one of the most widely used adsorbents for heavy metal ion removal from wastewater and is regarded as the benchmark in the field of adsorption by many researchers [18]. Reddad et al reported that the Cu 2+ adsorption capacity of granular activated carbon is 5.08 mg/g [40].…”

“…Therefore, nanocelluloses with the metal-binding groups are ideal candidates for the treatment of high-volume and low-concentration pollutant water. So far, the use of nanoscaled cellulose for water remediation remains a relatively uncharted area in which few extensive studies have been published [15][16][17][18]. We have reported earlier that the sorption capacities of Ag + onto cellulose nanocrystals are higher than those of cellulose nanofibers; being 34 mg/g and 14 mg/g, respectively [17].…”

“…We also reported that Cu 2+ and cellulose nanofibers can be well recycled and reused after adsorption. The regeneration was performed in acid medium since cellulose nanofibers have a low metal binding capacity at low pH [18]. Silver, copper and iron are the target metals in the current study, since all of them belong to the most common pollutants in industrial effluents.…”

Phosphorylated nanocellulose papers for copper adsorption from aqueous solutions

“…Cellulose nanofibrils (CNF), a special type of cellulose with fibrils in the nm range (Klemm et al 2011), were recently demonstrated to be capable of removing different kinds of ions by adsorption in static media whereby via the introduction of certain functional groups, such as acid or ammonium groups, the effect of adsorption of heavy metal ions, dyes or nitrates can be enhanced to a great extent (Hokkanen et al 2013;Jin et al 2013;Pei et al 2013;Yu et al 2013a, b;Karim et al 2014;Liu et al 2014;Sehaqui et al 2014). CNF can be produced from industrial waste streams, for example fibre sludge, and do not necessarily require chemicals or solvents for their production.…”

Sulfonated nanocellulose for the efficient dispersive micro solid-phase extraction and determination of silver nanoparticles in food products

“…The ability to produce well-individualized nanofiber dispersions in ionic liquids has enabled the obtainment of NC based composites as excellent extraction platforms for heterocyclic amine [18]. Effective NC platforms can also be easily obtained by surface modification with a variety of molecules for efficient extraction of contaminants from both simple [19][20][21][22] and complex matrices [23,24]. Self-assembly of danofloxacin with cyclodextrin-modified NC packed in a minicolumn for solid-phase microextraction (SPME) to obtain a suitable encapsulation and thus, the resulting inclusion complex is an excellent example [24].…”