Samkeliso S. Ndzimandze, Welldone Moyo, Oranso T. Mahlangu, Adolph A. Muleja, Thabo T. I. Nkambule, Alex T. Kuvarega
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引用次数: 0
摘要
前驱体材料的高成本阻碍了陶瓷膜(CM)的商业化。在这项工作中,利用低成本材料、高岭土和粉煤灰(重量百分比分别为≈67%和 26%),通过 200 巴压制和 900 °C 煅烧制备了微滤陶瓷盘(直径≈50 毫米,厚 4 毫米)。膜表征包括物理化学特性、NOM 去除效率和污垢倾向分析。此外,还对从南非夸祖鲁-纳塔尔省的四家饮用水处理厂(DWTPs)收集的样品进行了 CM 效率测试。与所有 DWTPs 的砂滤步骤相比,CM 的 NOM 去除率高出 18.5-33.4% 不等。荧光激发-发射矩阵(FEEM)研究表明,原水中的陆生腐殖质和富勒烯类 NOM 部分占主导地位,所有污水处理厂均可通过 CM 去除这些部分(比各污水处理厂的砂滤去除率高出 64.7%)。这项研究证明了用简陋材料制造的陶瓷膜的实用性,并为提升和改造该技术以去除传统饮用水处理厂的 NOM 馏分提供了机会。
Removal of Natural Organic Matter Fractions by Kaolin/Fly Ash Ceramic Microfiltration Membrane in Drinking Water: Insights from a Laboratory Scale Application
The high cost of precursor materials has hindered commercialization of ceramic membranes (CM). In this work, a microfiltration ceramic disc (≈50 mm in diameter and 4 mm thick) is prepared from low-cost materials, kaolin, and fly ash (≈67 and 26 wt.%, respectively) by pressing at 200 bar and calcining at 900 °C. Membrane characterization involved physicochemical properties, NOM removal efficiency, and fouling propensity analysis. Furthermore, the efficiency of the CM is tested on samples collected from four drinking water treatment plants (DWTPs) in KwaZulu-Natal Province of South Africa. The NOM removal efficiencies ranged from 18.5–33.4% higher than that achieved by the sand filtration step of all the DWTPs. Fluorescence excitation-emission matrix (FEEM) studies show dominance of terrestrial humic-like and fulvic-like NOM fractions in the raw water and are amenable to removal by CM at all the DWTPs (up to 64.7% higher than removal by sand filters at the respective plants). This study demonstrates the utility of ceramic membranes fabricated from rudimentary materials and presents an opportunity to upscale and retrofit the technology to target the removal of NOM fractions at conventional drinking water treatment plants.
期刊介绍:
Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018.
The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface.
Advanced Materials Interfaces covers all topics in interface-related research:
Oil / water separation,
Applications of nanostructured materials,
2D materials and heterostructures,
Surfaces and interfaces in organic electronic devices,
Catalysis and membranes,
Self-assembly and nanopatterned surfaces,
Composite and coating materials,
Biointerfaces for technical and medical applications.
Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.