Potential Use Of Inexpensive Green Tealeaves For The Bioremoval Of Hair Dyes | 12172
Journal of Biotechnology & Biomaterials
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Green tea is perhaps one of the most common and popular brewing teabags in our kitchens. Their chemical metabolites are
precious for the treatment and prevention of some diseases. However, these leaves become a sanitation and disposal concern
for larger scale industries that use teabags as raw materials. This study proposes the use of spent green tealeaves (GT) for the
removal of hair dyes Basic Yellow 57 (BY57) and Basic Blue 99 (BB99). Dyes are underestimated pollutants that have impacts on
humans and ecology. Equilibrium and kinetics studies were carried out in batch experiments. Our results show that adsorption
of BY57 is optimized at pH 6 using 100mg of adsorbent in 50mL of a 85 mg/L solution. On the other hand, BB99 was better
adsorbed at pH 5 with 75mg of GT of a 200mg/L dye solution. Salinity and presence of heavy metals experiments indicate a
negative impact of these compounds on the adsorption. Isotherm theories of Langmuir, Freundlich, Dubinin-Radushkevich and
Temkin were used to model the adsorption of both dyes on the adsorption, showing a good correlation. Kinetics experiments
were also modeled and showed that less than 2 hours are needed to achieve the maximum adsorption. Finally, the physical and
chemical properties of GT were elucidated using TGA, FTIR, SEM, and surface and porosity analyses, indicating its potential
applicability for real conditions.
Abel E. Navarro received his Ph.D. degree in Biomolecular Chemistry at New York University. Now, as a Junior Faculty at BMCC, he is developing new
bioremediation alternatives for the elimination of pollutants from wastewaters. His work also includes chemical modification of adsorbents and production of
different adsorption sites to improve the affinity between pollutants and adsorbents. He has a publication record of more than 25 papers in specialized and
peer-reviewed journals and has participated in several conferences. This study was done in collaboration with the Pontificia Universidad Cat?lica del Per?
and Universidad Peruana Cayetano Heredia under the project N? 001-2012-L?Oreal-CONCYTEC
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