A facile, low cost, fast, and environmentally benign method was introduced for the biogenic removal of copper, chromium, and nickel, ions using a simultaneous bioreduction–adsorption approach by which the metal ions were bioreduced by the phytochemicals present in the aqueous leaf extract of Eryngium campestre and adsorbed onto ternary Cu/Cr/Ni nanoparticles nuclei. The produced metal nanoparticles were collected by centrifugation for further use. Systematic studies on the effect of different parameters such as reaction time and pH on the removal efficiency (RE) of metal ions and nanoparticle synthesis efficiency (NPSE) revealed that adsorption and nanoparticle synthesis processes complete within only 3.5 min at all of the tested pHs. Maximum RE of 98.92%, 98.16%, and 93.39% were obtained for Cu, Cr, and Ni ions at pH 7, respectively. Under the same operational conditions, overall NPSE of 97.77% was obtained for the produced nanoparticles, which was consistent with the average removal efficiency of the three metal ions. Furthermore, the green synthesized ternary nanoparticles were characterized, and the formation of the nanoparticles or the ions removal phenomena was modeled with different kinetic models. The presented approach could be encouraging from both environmental remediation and nanoparticle production points of view.

引入了一种简便，低成本，快速且对环境有益的方法，采用同步生物还原-吸附方法生物去除铜，铬和镍离子，该方法通过水叶提取物中存在的植物化学物质对金属离子进行生物还原。的刺坎佩斯特里并吸附到三元Cu / Cr / Ni纳米颗粒核上。通过离心收集产生的金属纳米颗粒以进一步使用。对不同参数（例如反应时间和pH）对金属离子去除效率（RE）和纳米颗粒合成效率（NPSE）的影响进行的系统研究表明，在所有测试的pH值下，吸附和纳米颗粒合成过程仅需3.5分钟即可完成。在pH 7时，Cu，Cr和Ni离子的最大RE分别为98.92％，98.16％和93.39％。在相同的操作条件下，所生产的纳米颗粒的总NPSE为97.77％，与三种金属离子的平均去除效率一致。此外，对绿色合成的三元纳米粒子进行了表征，并用不同的动力学模型对纳米粒子的形成或离子去除现象进行了建模。从环境修复和纳米颗粒生产的角度来看，所提出的方法可能是令人鼓舞的。