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Nitrate is a colorless, odorless chemical substance with a chemical formulation of NO3 and average mass of 62.0049 g/mol. According to an announcement of the world health organization (WHO), the standard amount of nitrate in potable water is at most 50 ml/L (based on nitrate). Nitrate enters into the body and is transformed to nitrite by digestive system’s bacteria, then enters to the circulatory system and oxides the exiting iron in Hemoglobin of blood which converts the iron capacity from 2 to 3. As a result of this process Hemoglobin is converted to Methemoglobin which has far more less capacity in oxygen delivery. Therefore, the tissues cannot receive sufficient oxygen and it causes a disease called “Methemoglobinemia”. The objective of this study was to investigate the nitrate removal using wheat straw and determining the adsorption isotherms and kinetics. In this study, nitrate solutions were prepared from potassium nitrate salt. The pH values of the solutions were adjusted by NaOH and HCl at a concentration of 0.1 mol/L. The pH of the solution was adjusted to different values (4 to 13). Kinetics Hedieh Ahmadpari Graduate of Irrigation and Drainage, Department of Irrigation and Drainage, College of Aburaihan, University of Tehran, Iran. Email: h.ahmadpari@gmail.com Mohsen Eskafi Noghany Expert, Department of irrigation and drainage, College of Aburaihan, University of Tehran, Iran. Email: m_skafi@ut.ac.ir

Kinetics Modeling and Isotherms for Adsorption of Nitrate from Aqueous Solution by Wheat Straw