Degradation of synthetic dyes using nanoparticles: a mini-review

Mehta, Malvika; Sharma, Mahima; Pathania, Kamni; Jena, Pabitra Kumar; Bhushan, Indu

doi:10.1007/s11356-021-15470-5

Cited by 47 publications

(14 citation statements)

References 95 publications

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“…NPs of different metals such as Ag, Au, Zn and Co have shown their efficiency to remove different azo dyes from water, as reviewed recently (Dihom et al, 2022; Mehta et al, 2021; Raval et al, 2016). However, many heavy metals are toxic even in low concentrations, and thus, harmful in the environment (Marimuthu et al, 2020).…”

Section: Discussionmentioning

confidence: 95%

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Photocatalytic and biological activities of green synthesized SnO2 nanoparticles using Chlorella vulgaris

Al‐Enazi

Alwakeel

Alhomaidi

2022

Journal of Applied Microbiology

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Aims:To produce tin oxide (SnO 2 ) nanoparticles (NP) with microalga for use in azo dye-polluted wastewater treatment and to optimize the conditions to synthesize as small NPs as possible. Methods and Results:The green microalga Chlorella vulgaris mediated NPs were synthesized after an optimization process utilizing the statistical response surface methodology (RSM). The optimized synthesis conditions were 200 W microwave power, 0.5 mM SnCl 2 concentration and 200°C calcination temperature. Methyl orange (MO) was studied for its photocatalytic degradation with UV. Antibacterial activity against four pathogenic bacteria was studied using the well diffusion method. Cytotoxicity was measured using the MMT assay with lung cancer cell line A549, and antioxidant activity using DPPH radical scavenging. Following the optimization of their production, the produced crystalline SnO 2 NPs were on average 32.2 nm (by XRD) with a hydrodynamic size of 52.5 nm (by LDS). Photocatalytic degradation of MO under UV was nearly complete (94% removal) after 90 min and the particles could be reused for 5 cycles retaining 80% activity. The particles had antibacterial activity towards all five tested bacterial pathogens with the minimum inhibitory concentrations ranging from 22 to 36 μg/ml. The minimum bactericidal NP concentration varied between 83 and 136 μg/ml. Antioxidant activity was concentration dependent. A cytotoxicity was determined towards A549 cells with an LD50 of 188 μg/ ml after 24 h of incubation, a concentration that is much higher than the active concentration for dye removal ranging from 22 to 36 μg/ml. Conclusions: After optimization, SnO 2 nanoparticles produced with C. vulgaris displayed high photocatalytic activity at concentrations below their antibacterial and cytotoxic activities.Significance and Impact of the study: The SnO 2 nanoparticles produced with the help of microalgae are suitable for the removal of MO dye from wastewater. Further applications of this green technology can be expected.

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Section: Discussionmentioning

confidence: 95%

“…At the highest tested concentration (350 μg/mL), the viability decreased to 35% after 24 h of incubation. water, as reviewed recently (Dihom et al, 2022;Mehta et al, 2021;Raval al., 2016). However, many heavy metals are toxic even in low concentrations, and thus, harmful in the environment (Marimuthu et al, 2020).…”

Section: Biological Activitiesmentioning

confidence: 91%

Photocatalytic and biological activities of green synthesized SnO2 nanoparticles using Chlorella vulgaris

Al‐Enazi

Alwakeel

Alhomaidi

2022

Journal of Applied Microbiology

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“…These techniques are costly, time consuming, and produce by-products. In order to reduce these challenges, researchers are focusing on natural substitutes for the degradation of synthetic dyes [ 41 ]. Biological treatments are the ideal techniques for improving the quality of the effluents because they are cost-effective and efficient.…”

Section: Resultsmentioning

confidence: 99%

Efficient Catalytic Degradation of Selected Toxic Dyes by Green Biosynthesized Silver Nanoparticles Using Aqueous Leaf Extract of Cestrum nocturnum L.

et al. 2022

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In the present study, the catalytic degradation of selected toxic dyes (methylene blue, 4-nitrophenol, 4-nitroaniline, and congo red) using biosynthesized green silver nanoparticles (AgNPs) of Cestrum nocturnum L. was successfully performed. These AgNPs are efficiently synthesized when a reaction mixture containing 5 mL of aqueous extract (3%) and 100 mL of silver nitrate (1 mM) is exposed under sunlight for 5 min. The synthesis of AgNPs was confirmed based on the change in the color of the reaction mixture from pale yellow to dark brown, with maximum absorbance at 455 nm. Obtained NPs were characterized by different techniques, i.e., FTIR, XRD, HR-TEM, HR-SEM, SAED, XRD, EDX, AFM, and DLS. Green synthesized AgNPs were nearly mono-dispersed, smooth, spherical, and crystalline in nature. The average size of the maximum number of AgNPs was 77.28 ± 2.801 nm. The reduction of dyes using a good reducing agent (NaBH4) was tested. A fast catalytic degradation of dyes took place within a short period of time when AgNPs were added in the reaction mixture in the presence of NaBH4. As a final recommendation, Cestrum nocturnum aqueous leaf extract-mediated AgNPs could be effectively implemented for environmental rehabilitation because of their exceptional performance. This can be utilized in the treatment of industrial wastewater through the breakdown of hazardous dyes.

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“…Nanotechnology is the eld which is getting advanced which leads to the usage of nanoparticles for unique applications (Mehta et al 2021) (Ahmad et al 2022). The competence of producing different materials with inimitable and unfamiliar properties is seen in the eld of nanotechnology (Kumari, Alam, and Siddiqi 2019).…”

Section: Introductionmentioning

confidence: 99%

Application of Green Synthesized Silver Nanoparticles Against the Synthetic Azo Dye (Methyl Red) Degradation From Wastewater

Pandiyan

Rajagopal

Subbiah

2023

Preprint

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Nanotechnology is widely used by researchers due to its high surface volume ratio. It is nowadays employed in wastewater treatment due to its high efficiency. Metallic nanoparticles are used as it shows anti-microbial property and catalytic property. In the present study silver nanoparticle is used for treating the polluted water. Its characterisation is done using UV-Visible spectroscopy, FTIR (Fourier Transform Infrared Spectroscopy). The confirmation for the formation of the nanoparticle is done using the UV-Visible spectroscopy and functional group confirmation is done using the FTIR. In FTIR the peaks are observed at 3311.481 cm− 1 and 2402.918 cm− 1 corresponding to O-H Stretching and N-H Stretching. The peak at 1765.336 cm− 1 and 1358.396 cm− 1 represents the C-H Bending, and O-H Bending for the synthesised silver nanoparticle. This treated water can be further used for agricultural and domestic purposes.

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Degradation of synthetic dyes using nanoparticles: a mini-review

Cited by 47 publications

References 95 publications

Photocatalytic and biological activities of green synthesized SnO2 nanoparticles using Chlorella vulgaris

Photocatalytic and biological activities of green synthesized SnO2 nanoparticles using Chlorella vulgaris

Efficient Catalytic Degradation of Selected Toxic Dyes by Green Biosynthesized Silver Nanoparticles Using Aqueous Leaf Extract of Cestrum nocturnum L.

Application of Green Synthesized Silver Nanoparticles Against the Synthetic Azo Dye (Methyl Red) Degradation From Wastewater

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