Enhanced removal of hydrocarbons BTX by light-driven Aspergillus niger ZnS nanobiohybrids

Uddandarao, Priyanka; Lens, P.N.L.

doi:10.1016/j.enzmictec.2022.110020

Cited by 10 publications

(9 citation statements)

References 69 publications

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“… 83 reported Saccharomyces cerevisiae –InP hybrids to produce shikimic acid, Cupriavidus necator –cadmium sulfide, cadmium selenide, indium phosphide, and copper zinc tin sulfide core–shell ZnS hybrids to produce methyl ketones, butanediol, ethylene, polyhydroxybutyrate and propanol. In our previous studies, we reported the use of Aspergillus niger cells–ZnS NB formation for enhanced degradation of methyl orange dye 32 , 33 and conducted experiments for the removal of benzene, toluene and xylene individually as well as in binary and trinary mixtures. 32 , 33 …”

Section: Discussionmentioning

confidence: 99%

“…In our previous studies, we reported the use of Aspergillus niger cells–ZnS NB formation for enhanced degradation of methyl orange dye 32 , 33 and conducted experiments for the removal of benzene, toluene and xylene individually as well as in binary and trinary mixtures. 32 , 33 …”

Section: Discussionmentioning

confidence: 99%

“…The net interaction energy between A. niger cells and CuS NPs was calculated as described by Uddandarao and Lens. 32 , 33 …”

Section: Methodsmentioning

confidence: 99%

“…Transmission electron microscopy (TEM) was performed as described by Uddandarao and Lens. 32 , 33 Oven‐dried CuS–Che NPs and lyophilized CuS–Bio NPs were dispersed in ethanol. A drop of this was placed on the copper grids using a pipette and kept overnight under vacuum in a desiccator.…”

Section: Methodsmentioning

confidence: 99%

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Enhanced production of amylase, pyruvate and phenolic compounds from glucose by light‐driven Aspergillusniger–CuS nanobiohybrids

Uddandarao

Lens

2022

J of Chemical Tech & Biotech

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BACKGROUND:The demand for value-added compounds such as amylase, pyruvate and phenolic compounds produced by biological methods has prompted the rapid development of advanced technologies for their enhanced production. Nanobiohybrids (NBs) make use of both the microbial properties of whole-cell microorganisms and the light-harvesting efficiency of semiconductors. Photosynthetic NBs were constructed that link the biosynthetic pathways of Aspergillus niger with CuS nanoparticles. RESULTS: In this work, NB formation was confirmed by negative values of the interaction energy, i.e., 2.31 × 10 8 to −5.52 × 10 8 kJ mol −1 for CuS-Che NBs, whereas for CuS-Bio NBs the values were −2.31 × 10 8 to −4.62 × 10 8 kJ mol −1 for CuS-Bio NBs with spherical nanoparticle interaction. For CuS-Bio NBs with nanorod interaction, it ranged from −2.3 × 10 7 to −3.47 × 10 7 kJ mol −1 . Further, the morphological changes observed by scanning electron microscopy showed the presence of the elements Cu and S in the energy-dispersive X-ray spectra and the presence of CuS bonds in Fourier transform infrared spectroscopy indicate NB formation. In addition, the quenching effect in photoluminescence studies confirmed NB formation. Production yields of amylase, phenolic compounds and pyruvate amounted to 11.2 ∼mol L −1 , 52.5 ∼mol L −1 and 28 nmol ∼L −1 , respectively, in A. niger-CuS Bio NBs on the third day of incubation in the bioreactor. Moreover, A niger cells-CuS Bio NBs had amino acids and lipid yields of 6.2 mg mL −1 and 26.5 mg L −1 , respectively. Furthermore, probable mechanisms for the enhanced production of amylase, pyruvate and phenolic compounds are proposed.CONCLUSION: Aspergillus niger-CuS NBs were used for the production of the amylase enzyme and value-added compounds such as pyruvate and phenolic compounds. Aspergillus niger-CuS Bio NBs showed a greater efficiency compared to A. niger-CuS Che NBs as the biologically produced CuS nanoparticles had a higher compatibility with A. niger cells.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The net interaction energy between A. niger cells and CuS NPs was calculated as described by Uddandarao and Lens. 32 , 33 …”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Enhanced production of amylase, pyruvate and phenolic compounds from glucose by light‐driven Aspergillusniger–CuS nanobiohybrids

Uddandarao

Lens

2022

J of Chemical Tech & Biotech

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“…It has been reported that the species Aspergillus niger exhibits a high capacity for the bioremediation of various aromatic hydrocarbons from petroleum in contaminated freshwater, including surface and groundwater, and in wastewater treatment. Its e ciency in a saline environment is not found in the literature (Rodrigues et al, 2017;Sánches-Vasquez et al, 2018, Prianka andLens, 2022).…”

Section: Introductionmentioning

confidence: 97%

Detoxification of BTEX in a saline environment by Aspergillus niger

Rodrigues,

Salgado,

Galhanas

et al. 2024

Preprint

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BTEX can be found in marine and estuarine waters due to accidental spills of oil and derivatives, as well as in production water and effluents from petrochemical plants. Solutions involving the bioremediation of these compounds in both saline environments and effluents with high salinity are necessary. The halotolerance of Aspergillus niger was tested by subjecting it to a gradual increase in salinity through the sequential addition of NaCl from 2 to 30‰ (v/v). It supported its growth up to 25‰, with a biomass production rate of 0.93 ± 0.11 g/d. The adapted biomass was used in batch reactor assays to test the biodegradation of BTEX (1,500 mg/L). The fungi removed BTEX more rapidly in the presence of 2 g/L of sucrose: benzene (2.20 d-1) > toluene (1.83 d-1) > ethylbenzene (1.12 d-1) > xylene (0.91 d-1). However, even in the absence of sucrose, there was removal in the reactors with fungi: benzene (1.13 d-1) > toluene (0.97 d-1) > ethylbenzene (0.77 d-1) > xylene (0.68 d-1), with higher removal through microbial action (absorption and adsorption). Benzene was the only compound found adsorbed to the mycelium (1.50 ± 0.19 to 13.35 ± 4.72 mg/g of biomass).

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Construction of Novel Z-scheme Heterojunction in ZnFe2O4/P25 @ MOF-5 Nanocomposite from Plastic Waste for Efficient Photodegradation of Aqueous BTX Under Visible Light

Abdel-Azim,

El-Desouki,

Mady

et al. 2023

J Inorg Organomet Polym

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An innovative strategy to reduce water pollution is adsorption-assisted photocatalysis. A novel mesoporous heterogeneous adsorbent MOF-5-based photocatalysts were successfully synthesized by a green method from plastic waste through a one-step solvothermal process. Additionally, ZnFe2O4 nanocrystals were physically ground with commercial Degussa P25 at room temperature to prepare ZF/P nanocomposite catalysts. These catalysts demonstrated significant photocatalytic activity for the removal of BTX from wastewater. BTX was successfully degraded in an aqueous solution utilizing integrated adsorption and photocatalytic degradation using the newly developed ZF/P@MOF-5 samples with 0.01% of ZF/P. The in-depth characterization of the ZF/P@MOF-5 confirmed its positive physicochemical properties, such as porous nature, stability, high surface area, beneficial functional groups on its surface, and photocatalytic activity. PL spectroscopy also shows that the ZF/P-incorporated MOF-5 nanocomposite has a lower electron-hole recombination rate. The as-prepared ZF/P@MOF-5 mesoporous heterogeneous adsorbent-photocatalyst presented high adsorption and maximum degradation of BTX under visible radiations after 180 min. The reusability results demonstrated that 20 P/ZF @MOF-5 composite can be used effectively for up to four cycles, which makes the process more economical. This experimental study demonstrates that the novel ZF/P-incorporated MOF-5 is a potential route to producing photocatalysts for dissociating BTX wastewater that is highly effective, stable, economical, and sustainable.

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Enhanced removal of hydrocarbons BTX by light-driven Aspergillus niger ZnS nanobiohybrids

Cited by 10 publications

References 69 publications

Enhanced production of amylase, pyruvate and phenolic compounds from glucose by light‐driven Aspergillusniger–CuS nanobiohybrids

Enhanced production of amylase, pyruvate and phenolic compounds from glucose by light‐driven Aspergillusniger–CuS nanobiohybrids

Detoxification of BTEX in a saline environment by Aspergillus niger

Construction of Novel Z-scheme Heterojunction in ZnFe2O4/P25 @ MOF-5 Nanocomposite from Plastic Waste for Efficient Photodegradation of Aqueous BTX Under Visible Light

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