The peel of Cucumis sativus L. was used as low-cost adsorbent and as an ideal alternative to the current expensive methods of removing dyes from waste water. An acid dye, Acid black-7 has been used as the adsorbate. Adsorption data were modeled using Langmuir, Freundlich, Temkin and Dubinin-Radushkevich adsorption isotherms. The data were also fitted to kinetic models such as pseudo-first order, pseudo-second order, Intra particle and Elovich model. The adsorbent was characterized by Fourier Transform infrared spectroscope (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM) with an EDAX (energy dispersive analysis of X-ray), and zeta potential measurements will be carried out in order to find the iso electric point of the adsorbent.