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Biomimetic System for the Application of Nanomaterials in Fluid Purification: Removal of Arsenic with Ferrihydrite
ACS Omega ( IF 3.7 ) Pub Date : 2020-03-10 , DOI: 10.1021/acsomega.9b04121 Kyriakos Atmatzidis 1 , Farbod Alimohammadi 2 , Daniel R Strongin 2 , Rouzbeh Tehrani 1
ACS Omega ( IF 3.7 ) Pub Date : 2020-03-10 , DOI: 10.1021/acsomega.9b04121 Kyriakos Atmatzidis 1 , Farbod Alimohammadi 2 , Daniel R Strongin 2 , Rouzbeh Tehrani 1
Affiliation
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The use of nanomaterials has transformed fields such as medicine and electronics. However, aggregation of nanomaterials in aqueous solutions, difficult recovery of spent nano-adsorbents from reactors, and a tremendous pressure loss caused by nano-adsorbents in adsorption columns have prevented the wide-scale use of nano-adsorbents in industrial applications for water purification. An over-reliance on traditional adsorption media for fluid purification practices has slowed innovation in this field. This study serves as a proof of concept for a new approach in utilizing nano-adsorbents in water treatment. A system based on the concept of renal dialysis was used to treat a solution of arsenite using two-line ferrihydrite (Fh) under environmental conditions. The performance was compared to traditional batch studies, and environmental variables pH and Eh were monitored. The system removed 67 and 91% of arsenite at 1.22 and 2.61 g/L Fh loadings, respectively, in comparison to batch experiments that removed 82 and 94% for similar loadings. Operational conditions and the physical design of the vessel limited the extent of removal that could be obtained with the system. Design advantages, shortcomings, and required improvements are discussed.
中文翻译：
纳米材料在流体净化中应用的仿生系统：水铁矿除砷
纳米材料的使用改变了医学和电子等领域。然而，纳米材料在水溶液中的聚集、从反应器中回收废纳米吸附剂的困难以及纳米吸附剂在吸附塔中引起的巨大压力损失阻碍了纳米吸附剂在水净化的工业应用中的广泛使用。流体净化实践对传统吸附介质的过度依赖已经减缓了该领域的创新。这项研究为在水处理中利用纳米吸附剂的新方法提供了概念证明。基于肾透析概念的系统用于在环境条件下使用双线水铁矿 (Fh) 处理亚砷酸盐溶液。将性能与传统批量研究进行比较，并监测环境变量 pH 和 Eh。该系统在 Fh 负载量为 1.22 和 2.61 g/L 时分别去除了 67% 和 91% 的亚砷酸盐，而批量实验则在类似负载量下去除了 82% 和 94% 的亚砷酸盐。容器的操作条件和物理设计限制了系统所能达到的去除程度。讨论了设计优点、缺点和所需的改进。
更新日期：2020-03-24
中文翻译：
纳米材料在流体净化中应用的仿生系统：水铁矿除砷
纳米材料的使用改变了医学和电子等领域。然而，纳米材料在水溶液中的聚集、从反应器中回收废纳米吸附剂的困难以及纳米吸附剂在吸附塔中引起的巨大压力损失阻碍了纳米吸附剂在水净化的工业应用中的广泛使用。流体净化实践对传统吸附介质的过度依赖已经减缓了该领域的创新。这项研究为在水处理中利用纳米吸附剂的新方法提供了概念证明。基于肾透析概念的系统用于在环境条件下使用双线水铁矿 (Fh) 处理亚砷酸盐溶液。将性能与传统批量研究进行比较，并监测环境变量 pH 和 Eh。该系统在 Fh 负载量为 1.22 和 2.61 g/L 时分别去除了 67% 和 91% 的亚砷酸盐，而批量实验则在类似负载量下去除了 82% 和 94% 的亚砷酸盐。容器的操作条件和物理设计限制了系统所能达到的去除程度。讨论了设计优点、缺点和所需的改进。
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