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Removal of contaminants from canal water using microwave synthesized zero valent iron nanoparticles
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-09-02 , DOI: 10.1039/d0ew00157k Salma Shad 1, 2, 3, 4 , Marie-France A. Belinga-Desaunay-Nault 5, 6, 7, 8, 9 , Sohail 4, 10, 11, 12 , Nadia Bashir 1, 2, 3, 4 , Iseult Lynch 5, 6, 7, 8, 9
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-09-02 , DOI: 10.1039/d0ew00157k Salma Shad 1, 2, 3, 4 , Marie-France A. Belinga-Desaunay-Nault 5, 6, 7, 8, 9 , Sohail 4, 10, 11, 12 , Nadia Bashir 1, 2, 3, 4 , Iseult Lynch 5, 6, 7, 8, 9
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Nanoscale zero valent iron nanoparticles (nZVI-NPs) have been used for the remediation of a wide variety of environmental contaminants. Here, nZVI-NPs were synthesized using a green method involving leaf extract of Mentha piperita as the reducing agent and microwave treatment in place of conventional heating. The resulting NP composition, morphology, surface charge and size were studied using UV-visible spectrophotometry (UV-vis), scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX) and dynamic light scattering (DLS), respectively. The plasmon resonance spectrum of the synthesized nZVI-NPs had a peak at 292 nm. The synthesized nZVI-NPs were spherical in shape, with sizes between 5 and 10 nm, and negatively charged with zeta potential of −27.9 ± 2.19 mV. The nZVI-NPs with a high reactive surface area were successfully utilized to remove phosphate, lead, ammonia, nitrate and chloride from water samples taken from the Worcester and Birmingham canal at the University of Birmingham, United Kingdom. A successful rapid removal of dissolved agricultural contaminants (phosphate, ammonia, nitrate, lead and chloride) by 10 μg/100 mL nZVI-NPs was observed during reaction times of 12–24 hours, confirming the use of the NPs as a viable remediation strategy. The nZVI-NPs adsorbed 85.01% of phosphate, 99.51% of ammonia, 86.33% of nitrate, and 83.4% of chloride present in the samples initially, as well as removing 79.33% of the lead present within 24 hours.
中文翻译：
使用微波合成的零价铁纳米颗粒去除运河水中的污染物
纳米级零价铁纳米颗粒（nZVI-NPs）已用于补救各种环境污染物。在这里，nZVI-NPs是用绿色方法合成的，涉及到薄荷薄荷叶提取物。作为还原剂和微波处理代替常规加热。分别使用紫外可见分光光度法（UV-vis），扫描电子显微镜，能量色散X射线光谱法（SEM-EDX）和动态光散射（DLS）研究了所得的NP组成，形态，表面电荷和尺寸。合成的nZVI-NP的等离子体共振光谱在292 nm处有一个峰。合成的nZVI-NP呈球形，大小在5至10 nm之间，并带有-27.9±2.19 mV的zeta负电荷。具有高反应表面积的nZVI-NP已成功地用于从英国伯明翰大学伍斯特和伯明翰运河的水样中去除磷酸盐，铅，氨，硝酸盐和氯化物。在12–24小时的反应时间内，观察到成功地以10μg/ 100 mL nZVI-NP快速去除了溶解的农业污染物（磷酸盐，氨，硝酸盐，铅和氯化物），从而确认了将NP用作可行的修复策略。最初，nZVI-NPs吸附了样品中存在的85.01％的磷酸盐，99.51％的氨，86.33％的硝酸盐和83.4％的氯，并在24小时内除去了79.33％的铅。
更新日期：2020-09-15
中文翻译：
使用微波合成的零价铁纳米颗粒去除运河水中的污染物
纳米级零价铁纳米颗粒（nZVI-NPs）已用于补救各种环境污染物。在这里，nZVI-NPs是用绿色方法合成的，涉及到薄荷薄荷叶提取物。作为还原剂和微波处理代替常规加热。分别使用紫外可见分光光度法（UV-vis），扫描电子显微镜，能量色散X射线光谱法（SEM-EDX）和动态光散射（DLS）研究了所得的NP组成，形态，表面电荷和尺寸。合成的nZVI-NP的等离子体共振光谱在292 nm处有一个峰。合成的nZVI-NP呈球形，大小在5至10 nm之间，并带有-27.9±2.19 mV的zeta负电荷。具有高反应表面积的nZVI-NP已成功地用于从英国伯明翰大学伍斯特和伯明翰运河的水样中去除磷酸盐，铅，氨，硝酸盐和氯化物。在12–24小时的反应时间内，观察到成功地以10μg/ 100 mL nZVI-NP快速去除了溶解的农业污染物（磷酸盐，氨，硝酸盐，铅和氯化物），从而确认了将NP用作可行的修复策略。最初，nZVI-NPs吸附了样品中存在的85.01％的磷酸盐，99.51％的氨，86.33％的硝酸盐和83.4％的氯，并在24小时内除去了79.33％的铅。
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