Macrogel and nanogel networks based on crosslinked poly (vinyl alcohol) for adsorption of methylene blue from aqua system

AbstractTwo different types of network were synthesized. Semi-IPN macrogel type PVA@P(AMPS-co-AAc) (SIMT) and PVA- EPC@P(AMPS-co-AAc) (100nm) nanogel (CCPNT). Poly (vinyl alcohol) (PVA) was used as matrix and copolymerized 2-acrylamido-2-methyl-1-propane- sulfonic acid (AMPS), Acrylic acid (AAc) based materials were used in the removal of methylene blue (MB). Epichlororhydrine (EPC) was used as crosslinker to link the CCPNT. The maximum removal for MB was observed at (10AAc-co-90AMPS) (wt.:wt. %) monomer ratio for both networks. The prepared macro and nanogel materials were characterized by SEM, BET, TEM and DLS. The adsorption followed pseudo-second-order kinetics and fit Langmuir-type isotherm. The adsorption capacity was found to be equal to 416.6mg/g, 181.8mg/g for CCPNT and SIMT, respectively

Decolorization of turbid sugar juice from sugar factory using waste powdered carbon

Abstract Waste management of powdered activated carbon from cyclone of some sugar factories was used for decolorization of sugar mud juice (SMJ) in this study. The presence of powdered activated carbon waste (PACW) was admitted again for their use in SMJ decolorization. The determined specific surface area are typically S BET = 613.887 m2/g and the pore distribution lies in mesoporous domain. Color removal (CR%) and decolorization capacity (DC) of the characterized PACW are similar to those of decolorants used at this time for sugar refining. The CR% with PACW reached 81.03% at pH7.0 and dosed in the amount 0.5 g/50 ml of SMJ. There are two acceptable mechanisms illustrates the attachments between phenols and carboxylate ions. In this paper, we put a simple and rapid dark liquid decolorization by controlling rejected carbon waste, which will be useful for treatment of dark liquid sugar. Graphical abstract Schematic representation of the simple pathway of SMJ decolorizatio

Synthesis of Biocompatible and Environmentally Nanofibrous Mats Loaded with Moxifloxacin as a Model Drug for Biomedical Applications

Biopolymeric chitosan structure (Cs) is rationally investigated owing to its potentiality in pharmaceutical applications. The synthetic routes of biomimetic Cs-based blend electrospun nanofibers were studied. Herein, biocompatible crosslinked electrospun polyvinyl alcohol (PVA)/Cs-reduced gold nanoparticles (Cs(Rg))/β-CD (beta-cyclodextrin) in pure water were fabricated. To this end, supportive PVA as a carrier, Cs bio modifier, and gold reductant and β-CD as smoother, inclusion guest molecule, and capping agent exhibit efficient entrapment of moxifloxacin (Mox) and consequently accelerate release. Besides, PVA/Cs(Rg)/β-CD paves towards controlled drug encapsulation-release affinity, antimicrobial, and for wound dressing. Without losing the nanofiber structure, the webs prolonged stability for particle size and release content up to 96.4%. The synergistic effect of the nanoformulation PVA/Cs(Rg)/β-CD against pathogenic bacteria, fungus, and yeast, including Staphylococcus aureus, Escherichia coli, Candida albicans, and Aspergillus niger, posed clear zones up to 53 φmm. Furthermore, a certain combination of PVA/Cs (Rg)/β-CD showed a total antioxidant capacity of 311.10 ± 2.86 mg AAE/g sample. In vitro cytotoxicity assay of HePG2 and MCF-7 NF6 can eradicate 34.8 and 29.3 µg/mL against selected cells