Spent tea leaves (STL), a valueless waste produced during the manufacturing of tea beverages, were investigated as a potential low-cost adsorbent for the removal of the azo dyes Reactive Blue 19 (RB19), Reactive Red 120 (RR 120), Reactive Violet 5 (RV5) and Reactive Green 19 (R19) from wastewater. Untreated STL showed very low removal efficiency (< 7%), while a significant increase in dye adsorption was observed when they were thermally activated. Heating STL to 300 °C for 1 hour resulted in removal efficiencies ranging from 68.5 to 98.4%. Characterization of the waste by FTIR and TG/DTA indicated that major structural and/or chemical changes of the cellulose and hemicellulose components of STL occurred during heating. © (2013) Trans Tech Publications, Switzerland.
Tea waste: A new adsorbent for the removal of reactive dyes from textile wastewater / Zuorro, Antonio; Santarelli, Maria Laura; Lavecchia, Roberto. - STAMPA. - 803:(2013), pp. 26-29. (Intervento presentato al convegno 2nd International Conference on Chemical Engineering, Metallurgical Engineering and Metallic Materials, CMMM 2013 tenutosi a Dali nel 3 August 2013 through 4 August 2013) [10.4028/www.scientific.net/amr.803.26].
Tea waste: A new adsorbent for the removal of reactive dyes from textile wastewater
ZUORRO, ANTONIO;SANTARELLI, Maria Laura;LAVECCHIA, Roberto
2013
Abstract
Spent tea leaves (STL), a valueless waste produced during the manufacturing of tea beverages, were investigated as a potential low-cost adsorbent for the removal of the azo dyes Reactive Blue 19 (RB19), Reactive Red 120 (RR 120), Reactive Violet 5 (RV5) and Reactive Green 19 (R19) from wastewater. Untreated STL showed very low removal efficiency (< 7%), while a significant increase in dye adsorption was observed when they were thermally activated. Heating STL to 300 °C for 1 hour resulted in removal efficiencies ranging from 68.5 to 98.4%. Characterization of the waste by FTIR and TG/DTA indicated that major structural and/or chemical changes of the cellulose and hemicellulose components of STL occurred during heating. © (2013) Trans Tech Publications, Switzerland.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
