Dried Typha angustifolia (TA) leavesor commonly known as the common cattail were evaluated as an adsorbent for the
adsorption of lead in synthetic aqueous solutions. Equilibrium studies were conducted in a batch mode and the selected sorption
isotherms were then applied. Equilibrium was achieved after 8 hours. The selected sorption isotherms were the Langmuir,
Freundlich, D-R and Temkin model. Data fitting was done based on linear regression analysis. The adsorption system fitted the
Langmuir model best as compared to the Freundlich, Temkin and D-R model. The maximum monolayer adsorption capacity
calculated from the Langmuir model was 51.02 mg/g with a removal rate of 89%. This proves that adsorption occurred via
monolayer coverage of the adsorbate at the outer layer of the adsorbent. The infrared spectra of the dried leaves before and after
adsorption confirmed that there was interaction between the lead ions and the organic functional groups of the leaves. Thus,
cattail leaves were successful in adsorbing lead in aqueous solution.