The adsorption of Hg(II) on modified tamarind nut carbon (Bicarbonate treated tamarindnut carbon - BTNC) was investigated. to assess the possible use of this adsorbent for the processing of mercury removal from wastewater. The influence of various factors such as agitation time, pH and carbon dosage on the adsorption capacity has been studied. Adsorption isothermal data could be interpreted by Langmuir and Freundlich equations. In order to understand the reaction mechanism, kinetic data has been studied using reversible first order rate equation.