Nanocomposite trimetals, (Cu-Pd)-nFe(0) and (Pd-Cu)-nFe(0), were used for enhancing both nitrogen gas selectivity and nitrate removal. The initial pH, temperature and initial nitrate concentration were investigated as variable parameters in this study. It was found that the trimetal (Pd-Cu)-nFe(0) (10% (Pd-Cu) loading and 2:1 (Pd:Cu) ratio) is promising under the conditions of 50 degrees C, pH 7 and 100 mg NO3-/L; its largest N-2 gas selectivity was 60.5%, and NO3- removal 90%. Based on the kinetic analysis, pseudo-second-order reaction was closely followed under the studied conditions. Higher nitrate removal rate was observed under acidic and high temperature conditions. The activation energy of nitrate reduction over the temperature range of 20-50 degrees C was 51.0 kJ mol(-1)
關聯:
Journal of The Taiwan Institute of Chemical Engineers, v.57, pp.143-153
