Department of Environmental Health, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
Environ Technol. 2011 Feb-Mar;32(3-4):251-60. doi: 10.1080/09593330.2010.495399.
Synthesized magnesium/copper (Mg/Cu) bimetallic particles have shown good potential for use in the reduction of nitrate from aqueous solutions. This study was conducted to investigate the main factors affecting the kinetics of nitrate reduction by Mg/Cu particles (<100 microm) in uncontrolled reaction conditions. The Mg/Cu bimetallic particles removed the majority of the various nitrate concentrations tested (50, 100, 150, 200 and 300 mg L(-1)) within a short period. The time required for the removal of 90.6% of the NO3(-) from a 100 mg L(-1) solution was about 20 min using 2 gL(-1) bimetallic Mg/Cu at an initial solution pH of 6. The activation energy (Ea) for nitrate reduction by Mg/Cu over the temperature range of 5 to 60 degrees C was 14.21 kJ mol(-1). The experimental results of the kinetic analysis from batch studies indicated that a higher initial nitrate concentration yielded a greater reaction-rate constant and the denitrification rate increased with increase Mg/Cu dosage.
合成的镁/铜（Mg/Cu）双金属颗粒已显示出在还原水溶液中的硝酸盐方面具有很好的应用潜力。本研究旨在研究在不受控制的反应条件下，Mg/Cu 颗粒（<100 微米）还原硝酸盐动力学的主要影响因素。Mg/Cu 双金属颗粒在短时间内去除了测试的各种硝酸盐浓度（50、100、150、200 和 300 mg L(-1))。在初始溶液 pH 值为 6 时，使用 2 gL(-1)的双金属 Mg/Cu，去除 100 mg L(-1)溶液中 90.6%的 NO3(-)所需的时间约为 20 分钟。在 5 至 60 摄氏度的温度范围内，Mg/Cu 还原硝酸盐的活化能（Ea）为 14.21 kJ mol(-1)。分批研究的动力学分析实验结果表明，较高的初始硝酸盐浓度产生更大的反应速率常数，随着 Mg/Cu 用量的增加，反硝化速率增加。
