Silver nanoparticles in dye effluent treatment: A review on synthesis, treatment methods, mechanisms, photocatalytic degradation, toxic effects and mitigation of toxicity

The current scenario of water resources shows the dominance of pollution caused by the draining of industrial effluents. The polluted waters have resulted in severe health and environmental hazards urging for a suitable alternative to resolve the implications. Various physical and chemical treatment...

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. B, Biology Biology, 2020-04, Vol.205, p.111823, Article 111823
Main Authors: Marimuthu, Sivasankari, Antonisamy, Arul Jayanthi, Malayandi, Sankar, Rajendran, Karthikeyan, Tsai, Pei-Chien, Pugazhendhi, Arivalagan, Ponnusamy, Vinoth Kumar
Format: Article
Language:English
Subjects:
Aquatic environment
Biodegradation
Biological effects
Chemical reactions
Chemical treatment
Color removal
Drainage
Dye degradation
Dye effluent treatment
Dyes
Effluent treatment
Effluents
Environmental hazards
Health hazards
Industrial effluents
Industrial pollution
Industrial wastewater
Mitigation
Nanocomposites
Nanoparticles
Optimization
Photodegradation
Reaction kinetics
Sediment pollution
Silver
Silver nanoparticles
Sludge
Soil contamination
Soil pollution
Surface properties
Toxicity
Treated water
Wastewater treatment
Water pollution
Water pollution effects
Water resources
Water treatment
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Summary:The current scenario of water resources shows the dominance of pollution caused by the draining of industrial effluents. The polluted waters have resulted in severe health and environmental hazards urging for a suitable alternative to resolve the implications. Various physical and chemical treatment steps currently in use for dye effluent treatment are more time consuming, cost-intensive, and less effective. Alternatively, nanoparticles due to their excellent surface properties and chemical reactivity have emerged as a better solution for dye removal and degradation. In this regard, the potential of silver nanoparticles in dye effluent treatment was greatly explored. Efforts were taken to unravel the kinetics and statistical optimization of the treatment conditions for the efficient removal of dyes. In addition, the role of silver nanocomposites has also experimented with colossal success. On the contrary, studies have also recognized the mechanisms of silver nanoparticle-mediated toxicity even at deficient concentrations and their deleterious biological effects when present in treated water. Hence, the fate of the silver nanoparticles released into the treated water and sludge, contaminating the soil, aquatic environment, and underground water is of significant concern. This review summarizes the current state of knowledge regarding the use of silver nanoparticles and silver-based nanocomposites in effluent treatment and comprehends the recent research on mitigation of silver nanoparticle-induced toxicity. [Display omitted] •Biological applications of green synthesized silver nanoparticles have been discussed.•Bio-fabrication of silver nanoparticles from bacteria, fungi and algae extract.•Photocatalytic degradation of various organic dyes using silver nanoparticles.•Mechanism and toxicity of silver nanoparticles have been reported.
ISSN:1011-1344
1873-2682
DOI:10.1016/j.jphotobiol.2020.111823