AUTHOR=Zahir Habib , Naidoo Michelle , Kostadinova Rada-Mayya , Ortiz Karla A. , Sun-Kou Rosario , Navarro Abel E. TITLE=Decolorization of hair dye by lignocellulosic waste materials from contaminated waters JOURNAL=Frontiers in Environmental Science VOLUME=2 YEAR=2014 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2014.00028 DOI=10.3389/fenvs.2014.00028 ISSN=2296-665X ABSTRACT=
Basic yellow 57 (BY57) was chosen as a model hair dye due to its prevalence in cosmetics wastewaters. This study proposes the use of lignocellulosic materials like spent tea leaves of peppermint (PM), chai tea (CT), and chamomile (CM) as raw adsorbents for the removal of BY57 from contaminated solutions. Batch adsorption experiments were carried out at room temperature to achieve the maximum adsorption capacity. Results indicate that the highest removal is achieved at pH 6–8, with a minimum adsorbent mass of 75 mg and in the absence of salinity, crowding agents and heavy metals. Adsorption equilibria were modeled according to the Langmuir and Freundlich isotherm theories and reported the following trend: PM > CT > CM, reaching