الكتلة الحيوية المادة الممتزة غير المكلفة والصديقة للبيئة لأوراق الشاي المستهلكة لمعالجة المحاليل المائية الملوثة بالأصباغ

الملخص EN

his investigations examines the efficiency of the consumed tea leaves (CTL) locally obtained from some houses after preparation of tea beverage in the removal of a basic dye model called Crystal violet (CV) from its aqueous solution.

A series of experiments were conducted in a batch mode system to assess the effects of CTL adsorbent dose (10-50) mg, pH (3.5-8.5), contact time (5-30 min), and CV initial concentrations (50-100) mg/l, The results showed that the sorption exhibited high efficiency for CV adsorption and the equilibrium state could be achieved in approximately 20 minutes for the different CV initial concentrations.

CV uptake was proved to increase with the increase in CTL dose, pH, contact time and CV initial concentration.

The applicability of Lungmuir and Freunflich isotherm equations was investigated, and the Lungmuir isotherm exhibited a better fit with the experimental data with linear regression value (R 2 ) of 0.9935.

The maximum isotherm capacity (qm) obtained from Lungmuir isotherm model, assuming that adsorption occurs on localized sites with no interaction between adsorbate molecules and maximum adsorption occurs when the surface is covered by a monolayer of adsorbate, was 119 mg/g for CV.

Therefore, CTL has the potential to be used as a local abundant low-cost eco-friendly adsorbent for the removal of CV from aqueous solutions.