Mohammad Mehdi Taghizadeh, Reza Vahdati
Environmental Engineering Department, Estahban Branch, Islamic Azad University-Fars, Iran
Environmental Engineering, Environmental Engineering Department, Estahban Branch, Islamic Azad university, Estahban, Fars, Iran
Key words: Nitrate, activated carbon, pistachio shell, walnut shell, almond shell.
Materials that are used for preparing activated carbon are very important on adsorption ability of the activated carbon. Chip agricultural waste, same as nut shells successfully can be used for preparing activated carbon .the abject of this research is comparing characteristics of activated carbon that are prepared by pistachio, walnut and almond shells in removing nitrate from aqueous solutions. Various samples of activated carbons was prepared by pistachio, walnut and almond shells .chemical activation was done by zinc chloride with weighting rate equale150%.the effect of PH ,Nitrate concentration, reaction time on efficiency of nitrate removal ,also was investigated. The results show the efficiency of nitrate removal for three nut shell consist of pistachio, walnut and almond shells were respectively,45.74%,41.7% and43.49%.most nitrate removal was happened on PH equal 8 for pistachio and PH equal 2 for walnut and almond shells. As the conclusion, activated carbon prepared by chip agricultural waste such as pistachio, walnut and almond shells have can be used for increasing the water quality. Carbon active that prepared by pistachio shell have better result on nitrate removal comparing to walnut and almond shells.