4.6 Review

Bioremediation of Hazardous Wastes Using Green Synthesis of Nanoparticles

Journal

PROCESSES
Volume 11, Issue 1, Pages -

Publisher

MDPI
DOI: 10.3390/pr11010141

Keywords

green technology; metal-based nanoparticles; pollutant; toxic dyes; heavy metals

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Advanced agronomic methods, urbanisation, and industrial expansion lead to global contamination of air, water and soil. Agriculture and industry pose threats to biodiversity and human health. Metal-based nanoparticles have shown promising potential in treating pollution, especially in resisting the uptake of toxic compounds by plants. Bio-based synthesis of nanoparticles using biogenic resources has been found effective in remediating environmental waste and treating polluted water. Strategies involving green synthesis of nanoparticles are non-toxic and can be scaled for commercial production.
Advanced agronomic methods, urbanisation, and industrial expansion contaminate air, water and soil, globally. Agricultural and industrial activities threaten living biota, causing biodiversity loss and serious diseases. Strategies such as bioremediation and physiochemical remediation have not been effectively beneficial at treating pollutants. Metal-based nanoparticles (NPs) such as copper, zinc, silver, gold, etc., in various nanoformulations and nanocomposites are used more and more as they effectively resist the uptake of toxic compounds via plants by facilitating their immobilisation. According to studies, bio-based NP synthesis is a recent and agroecologically friendly approach for remediating environmental waste, which is effective against carcinogens, heavy metal contamination, treating marine water polluted with excessive concentrations of phosphorus, nitrogen and harmful algae, and hazardous dye- and pesticide-contaminated water. Biogenic resources such as bacteria, fungi, algae and plants are extensively used for the biosynthesis of NPs, particularly metallic NPs. Strategies involving green synthesis of NPs are nontoxic and could be employed for commercial scale production. Here, the focus is on the green synthesis of NPs for reduction of hazardous wastes to help with the clean-up process.

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