Domincova Bergerova Eva, Kimmer Dusan, Kovarova Miroslava, Lovecka Lenka, Vincent Ivo, Adamec Vladimir, Kobolova Klaudia, Sedlarik Vladimir
Centre of Polymer Systems, Tomas Bata University in Zlin, Zlin, 760 01 Czech Republic.
Institute of Forensic Engineering, Brno University of Technology, 601 90 Brno, Czech Republic.
J Environ Health Sci Eng. 2021 Jun 21;19(2):1347-1360. doi: 10.1007/s40201-021-00691-0. eCollection 2021 Dec.
This research paper focuses on removing of arsenic from contaminated water via a nanofibrous polymeric microfiltration membrane, applied in prospective combination with an inorganic sorbent based on iron oxide hydroxide FeO(OH).
Nanofibrous materials were prepared by electrospinning from polyurethane selected by an adsorption test. The chemical composition (FTIR), morphology (SEM, porometry) and hydrophilicity (contact angle) of the prepared nanostructured material were characterized. The process of eliminating arsenic from the contaminated water was monitored by atomic absorption spectroscopy (AAS). The adsorption efficiency of the nanofibrous material and the combination with FeO(OH) was determined, the level of arsenic anchorage on the adsorption filter was assessed by a rinsing test and the selectivity of adsorption in arsenic contaminated mineral water was examined.
It was confirmed that the hydrophilic aromatic polyurethane of ester type PU918 is capable of capturing arsenic by complexation on nitrogen in its polymer chains. The maximum removal efficiency was around 62 %. Arsenic was tightly anchored to the polymeric adsorbent. The adsorption process was sufficiently selective. Furthermore, it was found that the addition of even a small amount of FeO(OH) (0.5 g) to the nanofiber filter would increase the efficiency of removal by 30 %.
The presented results showed that an adsorption filter based on a polyurethane nanostructured membrane added with an inorganic adsorbent FeO(OH) is a suitable way for the elimination of arsenic from water. However, it is necessary to ensure perfect contact between the surface of the nanostructure and the filtered medium.
本研究论文聚焦于通过纳米纤维聚合物微滤膜从受污染水中去除砷，并与基于氢氧化铁氧化物FeO(OH)的无机吸附剂联合应用。
通过静电纺丝法，从经吸附试验筛选出的聚氨酯制备纳米纤维材料。对制备的纳米结构材料的化学成分（傅里叶变换红外光谱）、形态（扫描电子显微镜、孔隙率测定）和亲水性（接触角）进行表征。采用原子吸收光谱法（AAS）监测从受污染水中去除砷的过程。测定纳米纤维材料及其与FeO(OH)组合的吸附效率，通过冲洗试验评估砷在吸附滤器上的固定水平，并检测在受砷污染的矿泉水中的吸附选择性。
证实酯型PU918亲水性芳香族聚氨酯能够通过其聚合物链中氮原子的络合作用捕获砷。最大去除效率约为62%。砷紧密固定在聚合物吸附剂上。吸附过程具有足够的选择性。此外，还发现向纳米纤维滤器中添加少量（0.5 g）FeO(OH)可使去除效率提高30%。
研究结果表明，添加无机吸附剂FeO(OH)的聚氨酯纳米结构膜吸附滤器是从水中去除砷的合适方法。然而，必须确保纳米结构表面与过滤介质之间的完美接触。
