Novel environmental method for enhanced biodegradation of contaminated wastewater via immobilizing nanoparticles on a new bacterial strain isolated industrial textile

• Published in: Journal of environmental management 2023-01, Vol.325, p.116528-116528, Article 116528
• Main Authors: Mehrzad, Meraat, Behpour, Mohsen, Kashi, Fereshteh Jookar
• Format: Article
• Language: English
• Subjects: Biodegradation; Biophotocatalyst; Synergetic; Textile; Titanium dioxide; Toxicity
• ISSN: 0301-4797; 1095-8630
• DOI: 10.1016/j.jenvman.2022.116528

Biological processes comprising bacteria, fungi, yeast, and algae received increasing interest for dye degradation due to their cost-effectiveness and eco-friendly nature. Hence, the current study aims to investigate the ability of the photocatalytic performance of N–S co-doped anatase TiO2 (NSTO) nanoparticles immobilized on isolated industrial textile bacteria (ITB) for degradation of basic blue 41 (BB 41). To prove the effect of improving the surface area of NSTO, NSTO also was immobilized on glass balls (NSTO-GB). NSTO nanoparticles were synthesized using sol-gel methods, and characterization of NSTO and NSTO-GB were measured using SEM, TEM, XPS, and DLS analysis. The results showed that the average size of NSTO was 50–60 nm. Moreover, the morphology and surface microstructure of ITB and ITB-NSTO were determined by the SEM, XPS technique. According to the results, ITB has a rod structure, NSTO nanoparticles are placed on the surface of ITB. However, NSTO was attached to the surface of ITB with the hydroxyl group. The ITB-NSTO indicated a higher BB 41 degradation yield (99%) than pure NSTO (65%) and ITB (74%). The effect of different factors was evaluated on biodegradation by ITB-NSTO. The high biodegradation was obtained in ITB (10 mg), NSTO (50 mg), BB41 (50 ppm), and pH 11. The GC-Mass, LC-Mass, and FT-IR analysis, which monitored the BB 41 degradation efficiency, proved the degradation efficiency by 99%. In the following, the toxicities of BB 41 solution before and after degradation were accessed through the brine shrimp lethality assay (BSLA) and seed germination assay, which displayed a considerable reduction in BB 41 after degradation. Toxicity results exhibited that ITB-NSTO has potential for industrial application. [Display omitted] •Introducing N–S dope and isolated industrial textile bacteria to TiO2 NPs.•N–S dope and isolated industrial textile bacteria enhance TiO2 NPs degradation yield.•Isolated industrial textile bacteria decrease TiO2 NPs aggregation.•Doping N–S into TiO2 NPs results in shifting its light absorbance to visible region.•Brine shrimp lethality and seed germination tests prove less toxicity of degraded dye.