Aspergillus tamarii mediated green synthesis of magnetic chitosan beads for sustainable remediation of wastewater contaminants

Abstract

The release of different hazardous substances into the water bodies during the industrial and textile processing stages is a serious problem in recent decades. This study focuses on the potentiality of Fe3O4-NPs-based polymer in sustainable bioremediation of toxic substances from contaminated water. The biosynthesis of Fe3O4-NPs by A. tamarii was performed for the first time. The effect of different independent variables on the Fe3O4-NPs production were optimized using Plackett–Burman design and central composite design (CCD) of Response Surface Methodology. The optimum Fe3O4-NPs production was determined using incubation period (24 h), temperature (30 °C), pH (12), stirring speed (100 rpm) and stirring time (1 h). The incorporation of Fe3O4-NPs into chitosan beads was successfully performed using sol–gel method. The modified nanocomposite exhibited remarkable removal capability with improved stability and regeneration, compared to control beads. The optimal decolorization was 94.7% at 1.5 g/l after 90 min of treatment process. The reusability of biosorbent beads displayed 75.35% decolorization after the 7th cycle. The results showed a highly significant reduction of physico-chemical parameters (pH, TDS, TSS, COD, EC, and PO4) of contaminated wastewater. The sorption trials marked Fe3O4-NPs-based biopolymer as efficient and sustainable biosorbent for the elimination of hazardous toxic pollutants of wastewater in a high-speed rate.

Magnetic NH2-MIL-101(Al)/Chitosan nanocomposite as a novel adsorbent for the removal of azithromycin: modeling and process optimization

“…This process is generally performed with filtration and centrifugation which require a lot of time, cost, and manpower. Hence, induction of magnetic properties to the MIL/Cs NCs using Fe 3 O 4 NPs and its separation using an external magnet was considered to solve this problem 26 , 27 .…”

Extracted Rutin from Moringa oleifera leaves has a potential inhibitory effect on Mushroom tyrosinase-diphenolase: Competitive inhibition and Computational simulation analyses

“…8B. From the FTIR chromatogram, a broad absorption peak was observed at 3335 cm − 1 which corresponds to the O-H overlapping stretching vibrations of the sugar and phenolic groups [29,52]. A peak with low intensity was determined at 1658 cm − 1 was assigned for the C = O stretching vibration.…”

Diversity of Mycogenic Oxide and Chalcogenide Nanoparticles: A Review

“…Several researchers have used fungal cultures to obtain iron oxide nanocomposite materials with enhanced properties. Fe 3 O 4 NPs with spherical morphology and size varying from 5 to 22 nm were myco-synthesized with an Aspergillus tamarii culture filtrate [ 44 ]. The conditions for NP production were optimized, including incubation period, stirring speed and time, temperature, and pH.…”