RSUSSH 2020
IN20-237 Synthesis of Nanoscale Zero-Valent Iron from Weed Extracts and Their Application for Azo Dye Decolorization
Presenter: Sothea Oum
Prince of Songkla University, Thailand
Abstract
Green nanoscale zero-valent iron particles represent a new tool of treatment environmental pollution that could provide cost-effective, high surface energy, eco-friendly and high reactive activity to some of the most challenging environmental cleanup problems. In this study, nanoscale zero-valent iron particles (nZVI) were synthesized from weed extracts. Twelve kinds of weed were studied to compare which one is the most suitable for synthesis of nZVI. From the results, Euphorbia hirta possesses the highest phenolic content (3.28 mg GAE/g) and reducing power (586.34 mg/g). nZVI was successfully synthesized by using Euphorbia hirta extract. The synthesized nZVI was used for the decolorization of azo dyes. With an initial dye concentration of 100 mg/L and nZVI dose of 1g/l, the removal efficiency reached over 99% within 60 min.
Citation format:
Oum, S., Kasikamphaiboon, P., & Khunjan, U.. (2020). Synthesis of Nanoscale Zero-Valent Iron from Weed Extracts and Their Application for Azo Dye Decolorization. Proceeding in RSU International Research Conference, May 1, 2020. Pathum Thani, Thailand.QUESTIONS & ANSWERS
1. Very good work and nice talk, but it's might be good if you include your slide that audiences can follow.
2. Do you think apart of Iron any metal that can use?
That you told "nZVI can be easily oxidized by oxygen in the air " How to reduce this effect in the future .
DARUNEE SERTPHON
1. Thanks for your suggestion.
2. Yes, of course. Not only Iron metal that can be used to synthesized nanoparticles. From the literature review, there are gold, platinum, silver, titanium, zinc, cerium, iron, and thallium, but Iron metal has an integral role in the remediation of environmental pollutants due to its reducing properties as an electron donor.
รศ.ปัญญา มณีจักร์ (CHAIRPERSON)
Thank you Ajarn for your good question. Depending on our research, Iron nanoparticle (nZVI) itself gets oxidised in the air easily, so during the research, we used two methods to reduce the oxidise:
1. After synthesized Iron nanoparticles, we washed three time with ethanol solution
2. We kept the synthesized Iron nanoparticles in the desiccator that filled with silica gel to prevent the moistor contain in the air.
How is the isotherm for adsorption azo dye ?
FAREEDA HAYEEYE (PARTICIPANT)
Thank you for your question, but in our study we do not study about the adsorption isotherm.