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使用聚（苯乙烯磺酸盐）/纳米氧化铝多层薄膜从水溶液中去除氟化物

Fluoride Removal from Aqueous Solutions Using Poly(Styrene Sulfonate)/Nanoalumina Multilayer Thin Films.

作者信息

Prathna Thanjavur Chandrasekaran, Raichur Ashok M

机构信息

Department of Materials Engineering Indian Institute of Science Bangalore 560012 India.

Nanotechnology and Water Sustainability Research Unit University of South Africa The Science Campus Florida Park 1710 Roodepoort Johannesburg South Africa.

出版信息

Glob Chall. 2018 Jan 16;2(2):1700064. doi: 10.1002/gch2.201700064. eCollection 2018 Feb 9.

DOI:10.1002/gch2.201700064
PMID:31565320
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6607118/
Abstract

In the present study, fluoride removal from drinking water is investigated using layer-by-layer (LbL) fabricated poly(sodium 4-styrene-sulfonate) (PSS)/AlO thin films. The surface morphology of the fabricated thin films is characterized using atomic force microscopy and field emission-scanning electron microscopy. Optical profilometry is used to determine the self-assembly of the multilayer thin films. The effect of various parameters such as adsorbent dosage, contact time, initial fluoride content, number of bilayers, surface area, and pH is thoroughly studied. Fluoride removal increases with the number of bilayers and number of slides (total surface area). The amount of fluoride adsorbed increases from 11.32 to 26 mg L when the number of substrates increases from 1 to 5. A 68% removal of fluoride is observed when 20 bilayers of PSS/AlO thin films with three slides at an initial fluoride concentration of 5 mg L are used, thereby bringing down the fluoride concentration level below the World Health Organization permissible limit. Slide reusability studies reveal that the fabricated thin films can be used for ten cycles without affecting the fluoride removal properties of the film. This study demonstrates the potential application of immobilized PSS/AlO thin films as an effective adsorbent for drinking water purification.

摘要

在本研究中，采用层层组装（LbL）制备的聚（4-苯乙烯磺酸钠）（PSS）/AlO薄膜对饮用水中的氟化物去除进行了研究。使用原子力显微镜和场发射扫描电子显微镜对制备薄膜的表面形貌进行了表征。光学轮廓仪用于确定多层薄膜的自组装情况。深入研究了吸附剂用量、接触时间、初始氟化物含量、双层数、表面积和pH值等各种参数的影响。氟化物去除率随双层数和载玻片数量（总表面积）增加而提高。当底物数量从1增加到5时，氟化物吸附量从11.32增加到26 mg/L。当使用20层PSS/AlO薄膜和三块载玻片，初始氟化物浓度为5 mg/L时，观察到氟化物去除率达68%，从而使氟化物浓度水平降至世界卫生组织允许限值以下。载玻片可重复使用性研究表明，制备的薄膜可用于十个循环，而不影响薄膜的氟化物去除性能。本研究证明了固定化PSS/AlO薄膜作为饮用水净化有效吸附剂的潜在应用。

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Introduction to nanocoatings produced by layer-by-layer (LbL) self-assembly.
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