Spent tea leaves from black and green tea were assessed for their potential to remove lead (II) form contaminated waters. Batch adsorption experiments made at temperatures between 5 and 40 degrees C and lead ion concentrations between 0.01 and 2 g/L showed that removal efficiencies higher than 95% can easily be achieved. The results were only marginally affected by the type of tea waste. At low lead loading the adsorption equilibrium was well described by the Langmuir equation, with a maximum adsorption capacity of 85-100 mg/g. A comparison with other adsorbent provided the following order for lead removal efficiency: black tea, coffee grounds > green tea > Fuller's earth > activated carbon.
Removal of lead from aqueous solutions by spent tea leaves / Lavecchia, Roberto; A., Pugliese; Zuorro, Antonio. - STAMPA. - 19(2010), pp. 73-78. ((Intervento presentato al convegno 4th International Conference on Safety & Environment in Process Industry tenutosi a Florence, ITALY nel MAR 14-17, 2010. - CHEMICAL ENGINEERING TRANSACTIONS. [10.3303/cet1019013].
Removal of lead from aqueous solutions by spent tea leaves
LAVECCHIA, Roberto;ZUORRO, ANTONIO
2010
Abstract
Spent tea leaves from black and green tea were assessed for their potential to remove lead (II) form contaminated waters. Batch adsorption experiments made at temperatures between 5 and 40 degrees C and lead ion concentrations between 0.01 and 2 g/L showed that removal efficiencies higher than 95% can easily be achieved. The results were only marginally affected by the type of tea waste. At low lead loading the adsorption equilibrium was well described by the Langmuir equation, with a maximum adsorption capacity of 85-100 mg/g. A comparison with other adsorbent provided the following order for lead removal efficiency: black tea, coffee grounds > green tea > Fuller's earth > activated carbon.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
