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Das, Merina Paul
- Removal of Lead(II) by Phyto-Inspired Iron Oxide Nanoparticles
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1 Department of Industrial Biotechnology, Bharath University, 173 Agaram Road, Selaiyur, Chennai-600 073, T. N., IN
1 Department of Industrial Biotechnology, Bharath University, 173 Agaram Road, Selaiyur, Chennai-600 073, T. N., IN
Source
Nature Environment and Pollution Technology, Vol 17, No 2 (2018), Pagination: 569-574Abstract
Heavy metals are toxic to the living bodies even though present in trace amounts. In this study, we have developed a simple approach for the biosynthesis of iron oxide nanoparticles (Fe3O4-NPs) using Trigonella foenum-graecum leaf extract and used it for possible removal of lead from aqueous solution and wastewater. SPR peak at 248 nm confirms the bioreduction and formation of Fe3O4-NPs. The shape and size of the nanoparticles were evaluated by SEM equipped with EDX, TEM, XRD. The particles were found crystalline and roughly spherical in shape with an average size range of 51.6- 215.7 nm. The possible biomolecules participated in the biosynthetic reaction which was confirmed by FTIR spectrum. These nanostructured particles were used for batch adsorption study for the removal of lead ions. The effects of various physical and chemical parameters like pH, contact time, adsorbent dosage and initial concentrations on the removal of heavy metals were studied on removal efficiency. The maximum lead(II) ions removal uptake was found 93±0.13% at pH 6.0 with 0.4g of these nanoparticles within 60 min of contact time. Desorption studies indicated that the regenerated nanoparticles retained its original metal adsorption efficiency. Results showed that these regenerable iron oxide nanoparticles can be used as nano-adsorbent for removal of heavy metals from environmental waste due to its high metal uptake capacity.Keywords
Trigonella foenum-graecum, Iron Oxide Nanoparticles, Lead, Adsorption.References
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- Efficient Dye Decolorization of an Azo dye on Fish Scale Hydroxyapatite
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Authors
Affiliations
1 Department of Industrial Biotechnology, BIHER, Chennai, IN
1 Department of Industrial Biotechnology, BIHER, Chennai, IN
Source
Research Journal of Pharmacy and Technology, Vol 12, No 6 (2019), Pagination: 2917-2921Abstract
Fish scales are excellent sources of calcium and phosphorous, that disposed every year as fishery waste from the fish industries and markets. Processing this abundant bio waste into some commercially important products could provide as an efficient fish scale remediation approach. Formulation of a commercial, effective dye-adsorbent concerned about its economical and renewability nature. This study demonstrated the capacity of hydroxyapatite, as adsorbent for removing an anionic dye congo red (CR) from aqueous solution. Hydroxyapatite (HAp) is an inorganic material, prepared from fish scale waste. The extracted adsorbent was characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD) and fourier infrared spectroscopy (FTIR). SEM reveals agglomerated distribution of spherical HAp particles, while the structural analysis of HAp confirms by the position of strong peaks in XRD and FTIR spectrum. The decolorization of dye experiment was carried in batch adsorption mode. The influence of various parameters like pH of the solution, contact time, adsorbent dose, and initial dye concentration on the adsorption was determined. The optimum percentage of decolorization of CR was observed 98% using 2 g/L of adsorbent after 180 min. The results suggest a new possibility mode for the removal of dye from the textile effluent.Keywords
Fish Scales, Hydroxyapatite, Congo Red, Adsorption, Dye Decolorization Efficiency.References
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