Fabrication of a novel cellulose acetate imprinted membrane assisted with chitosan‐wrapped multi‐walled carbon nanotubes for selective separation of salicylic acid from industrial wastewater

Abstract

Highly selective cellulose acetate (CA) blend imprinted membranes for salicylic acid (SA) removal were synthesized by phase inversion technique with chitosan as a functional polymer and chitosan-wrapped multi-walled carbon nanotubes (CHIwrapped MWCNTs) as the additives. The surface and cross-sectional morphology of membranes were strongly affected by the amount of CHI-wrapped MWCNTs. As compared to M 1 -MIM, M 2 -MIM, and M 4 -MIM, the M 3 -MIM with 2.0 wt % CHI-wrapped MWCNTs showed higher membrane flux, faster kinetic, binding capacity and better selectivity for SA. The experimental data of adsorption kinetic were well fitted to the pseudo-second-order kinetic model by multiple regression analysis. The M 3 -MIM had the maximum adsorption capacity for SA. The selectivity coefficients of SA to p-hydroxybenzoic acid (p-HB) and acetylsalicylic acid (ASA) over M 3 -MIM were 6.3090 and 6.0019, respectively, showing that M 3 -MIM had excellent binding affinity and selectivity for separation of SA from SA-contained aqueous solution.

Alkoxy-Modified Hyper-Cross-Linked Polymers with Hierarchical Porosity and Their Adsorption of Salicylic Acid from Aqueous Solution

“…In addition, the q m values of SA on MO-HCLP and PO-HCLP are predicted to be 492.6 and 621.1 mg/g by the Langmuir model, mostly larger than many other adsorbents reported in the literature (Table S2). ,,− Specifically, these two adsorbents are superior to some low-cost materials, such as sodium montmorillonite, XAD-4, and XAD-16, and some other similar polymers prepared by different methods, such as PVDM-P-A (an amino-modified hyper-cross-linked resin), HJ-M01 (a diethylenetriamine-modified hyper-cross-linked resin), and M-PMD-P-A (a magnetic polar post-cross-linked resin) …”

Advances in Molecularly Imprinting Technology for Bioanalytical Applications

“…A number of sp 2 hybridized carbonaceous nanomaterials have drawn more and more attention for functional decorations and modifications to electrodes [97], including 0D graphene quantum dots (GQDs) [26,34,85,86] and fullerene [98], 1D carbon nanotubes (CNTs) [79,80,81,82,88,90,99], 2D graphene [75,78,88] and graphene oxide sheets [74,87,89]. Semiconductor quantum dots are mainly used for fabricating bioprobes which function on optical signals, but some recent studies also employed QDs, such as CdS QDs [84], for electrochemical-MIP biosensors, where they mainly play the role of “amplifier” for electron transfer.…”