laboratory investigation of nitrate reduction in water using fe/cu nano particles

abstract the aim of this study is laboratory investigation of nitrate reduction in water using fe/cu nano particles. in this regards, nano fe0 (54±4 nm) and fe/cu particles (75±3 nm) was synthesized and characterized by x-ray diffraction pattern (xrd), scanning electron microscope (sem) and transmission electron microscopy (tem) photographs. the effects of coating load of nano-fe0 by cu (0, 5, 10, 15 and 20 % cu/fe0 w/w) in nitrate reduction process and chemical reaction modeling of nitrate degradation were carried out in batch experiments. in addition, the effect of initial acidity of solvent (ph= 3, 4, and 5) were investigated on the rate of nitrate reduction in which the initial nitrate-n concentration of solution was 200 mg l-1. all experiments have been carried out in presence of different ions in water. results indicated that applying only 5% w/w of cu has higher efficiency in the long-term degradation of nitrate-n. also, less initial ph of solvent results more removal rate of nitrate. chemical reaction modeling indicated that process of nitrate-n reduction by bimetallic fe/cu nano particles didn’t follow by first order reaction model.