The bimetallic nanoparticles have been used to improve the reactivity of Nanoscale Zero-Valent Iron (NZVI) during environmental contamination remediation. The main objective of this research was to determine the reactivity of the metal-doped NZVI (bimetallic) nanoparticles in aqueous solutions. In this study, FeCu, FeNi and FeAg bimetals were synthesized through the chemical reduction of ferric chloride with sodium borohydride then deposition of 1% (wt/wt) of the corresponding metal. The reactivity of these bimetallic nanoparticles in specific reaction conditions being; temperature, oxygen supply, pH, dosage and interferences (nitrate and phosphate) was studied. The results revealed that more iron dissolution was in acidic pH, high dosage (3 g/L) and continuous oxygen supply. Furthermore, nitrate was removed more in alkaline pH due to co-precipitation whereas phosphate was adsorbed more in acidic pH due to the positively charged surface that attracts negatively charged species. FeCu, FeNi and FeAg showed the best dissolution of iron in 90 °C, 5 °C and 25 °C respectively. Loaded metals (Cu, Ni, Ag) catalyzed NZVI reaction, promoted electrons’ transfer and minimized oxidation.

双金属纳米颗粒已用于改善环境污染修复过程中的纳米级零价铁（NZVI）的反应性。这项研究的主要目的是确定金属掺杂的NZVI（双金属）纳米粒子在水溶液中的反应性。在这项研究中，通过用硼氢化钠化学还原氯化铁，然后沉积1％（wt / wt）的相应金属，合成了FeCu，FeNi和FeAg双金属。这些双金属纳米颗粒在特定反应条件下的反应性为：研究了温度，氧气供应，pH，剂量和干扰（硝酸根和磷酸根）。结果表明，铁的溶解更多是在酸性pH，高剂量（3 g / L）和连续供氧的情况下。此外，由于共沉淀，硝酸盐在碱性pH中的去除更多，而磷酸盐在酸性pH中的吸附更多，这是由于带正电的表面吸引了带负电的物质。FeCu，FeNi和FeAg分别在90°C，5°C和25°C下显示出最佳的铁溶解度。负载金属（铜，镍，银）催化NZVI反应，促进电子转移，并最大程度地减少氧化。