Organic acids pretreatment effect on Rosa bourbonia phyto-biomass for removal of Pb(II) and Cu(II) from aqueous media.

The contemporary world is concerned only with non-biodegradable waste management which needs more sophisticated procedures as compared to biodegradable waste management. Biodegradable waste has the potential to become useful to society through a simple volarization technique. The researchers are behind sustainable nanotechnology pathways which are made possible by using biodegradable waste for the preparation of nanomaterials. This review emphasizes the potentialities of biodegradable waste produced as a viable alternative to create a sustainable economy that benefits all humans. Volarization results in the utilization of biowastes as well as provides safer and hazard-free green methods for the synthesis of nanoparticles. Starting from different sources to the application which includes therapeutics, food industry and water treatment. The review hovers over the pros and cons of biowaste-mediated nanoparticles and concludes with possible advances in the application. In the present scenario, the combination of green synthesis and biowaste can bring about a wide variety of applications in nanotechnology once the hurdles of bulk-scale industrial production are resolved. Given these points, the review is focused on the cost-effective synthesis of metal and metal oxide nanoparticles. 

/pdf/green-synthesis-of-nanoparticles-from-biodegradable-waste-1ih4rt2d.pdf

Green synthesis of nanoparticles from biodegradable waste extracts and their applications: a critical review

Background
Pomegranate peel carbon was tested for its ability to adsorb iron(II) ions from solutions with alterations in the parameters such as pH, contact time, sorbent weight, metal concentration, and temperature.

/pdf/removal-of-fe-ii-from-aqueous-solution-using-pomegranate-xiwoijhzbs.pdf

Removal of Fe(II) from aqueous solution using pomegranate peel carbon: equilibrium and kinetic studies

A review on adsorptive separation of toxic metals from aquatic system using biochar produced from agro-waste.

In recent years, interest in nanotechnology has increased exponentially due to enhanced progress and technological innovation. In tissue engineering, the development of metallic nanoparticles has been amplified, especially due to their antibacterial properties. Another important characteristic of metal NPs is that they enable high control over the features of the developed scaffolds (optimizing their mechanical strength and offering the controlled release of bioactive agents). Currently, the main concern related to the method of synthesis of metal oxide NPs is the environmental impact. The physical and chemical synthesis uses toxic agents that could generate hazards or exert carcinogenicity/environmental toxicity. Therefore, a greener, cleaner, and more reliable approach is needed. Green synthetic has come as a solution to counter the aforementioned limitations. Nowadays, green synthesis is preferred because it leads to the prevention/minimization of waste, the reduction of derivatives/pollution, and the use of non-toxic (safer) solvents. This method not only uses biomass sources as reducing agents for metal salts. The biomolecules also cover the synthesized NPs or act as in situ capping and reducing agents. Further, their involvement in the formation process reduces toxicity, prevents nanoparticle agglomeration, and improves the antimicrobial activity of the nanomaterial, leading to a possible synergistic effect. This study aims to provide a comprehensive review of the green synthesis of metal and metal oxide nanoparticles, from the synthesis routes, selected solvents, and parameters to their latest application in the biomedical field.

Green Synthesis of Metal and Metal Oxide Nanoparticles: A Review of the Principles and Biomedical Applications

Prospects of algae-based green synthesis of nanoparticles for environmental applications

The present work evaluates the sequestration of Pb(II) from aqueous solution by chemically pre-treated pomegranate (Punica granatum) biomass. The obtained results showed that initial metal ion concentration, kinetics affected the adsorption capacity of the pre-treated biosorbent. Maximum adsorption capacity for Pb(II) was observed at pH 4.5. Increase in biosorbent dose decreased Pb(II) uptake capacity. Metal uptake capacity of Pb(II) increased with increase in initial metal concentration . Metal uptake capacity decreased with time. Phosphoric acid pretreatment increased Pb(II) uptake capacity more than other acids. Equilibrium data was best represented by Langmuir adsorption isotherm and pseudo second order kinetic model.

Pb(II) removal from wastewater using Pomegranate waste biomass

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Prospects of algae-based green synthesis of nanoparticles for environmental applications

Pb(II) removal from wastewater using Pomegranate waste biomass