Department of Chemistry and Institute of Biological Interfaces, Sogang University, Seoul, Republic of Korea.
Department of Chemistry Education, Sanata Dharma University, Yogyakarta, Republic of Indonesia.
PLoS One. 2020 Apr 24;15(4):e0231475. doi: 10.1371/journal.pone.0231475. eCollection 2020.
The threat of arsenic contamination to public health, particularly in developing countries, has become a serious problem. Millions of people in their daily lives are still highly dependent on groundwater containing high levels of arsenic, which causes excessive exposure to this toxic element, due to the high cost and lack of water-treatment infrastructures. Therefore, a technique for large-scale treatment of water in rural areas to remove arsenic is needed and should be low-cost, be easily customized, and not rely on electrical power. In this study, in an effort to fulfill those requirements, we introduce a three-dimensional (3D), printed water-filtration system for arsenic removal. Three-dimensional printing can provide a compact, customized filtration system that can fulfill the above-mentioned requirements and that can be made from plastic materials, which are abundant. Armed with the versatility of 3D printing, we were able to design the internal surface areas of filters, after which we modified the surfaces of the 3D, printed filters by using iron (III) oxide as an adsorbent for arsenite. We investigated the effects of the controlled surface area on the flow rate and the deposition of the adsorbent, which are directly related to the adsorption of arsenic. We conducted isotherm studies to quantify the adsorption of arsenic on our 3D, printed filtration system.
砷污染对公共健康的威胁，尤其是在发展中国家，已成为一个严重的问题。由于成本高和缺乏水处理基础设施，日常生活中仍有数百万人高度依赖含砷量高的地下水，这导致人们过度接触这种有毒元素。因此，需要一种用于农村地区大规模处理水以去除砷的技术，并且该技术应该成本低、易于定制且不依赖电力。在这项研究中，我们努力满足这些要求，引入了一种用于去除砷的三维（3D）印刷水过滤系统。3D 打印可以提供紧凑、定制的过滤系统，满足上述要求，并且可以使用塑料材料制造，而塑料材料非常丰富。凭借 3D 打印的多功能性，我们能够设计过滤器的内部表面积，然后使用三氧化二铁（III）作为亚砷酸盐的吸附剂来修饰 3D 打印过滤器的表面。我们研究了控制表面积对流速和吸附剂沉积的影响，这与砷的吸附直接相关。我们进行了等温研究来量化我们的 3D 打印过滤系统对砷的吸附。
