期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 42, 期 5, 页码 2505-2515出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2021.12.053
关键词
Ceramic membrane; Waste attapulgite; Oil-water separation
资金
- Natural Science Foundation of Shandong Province, China [ZR2020ME030]
- National Natural Science Foundation of China [51772176]
- Excellent Youth Program of Shandong University of Science and Technology [2015JQJH102]
In this study, low-cost ceramic membranes were prepared using waste materials and demonstrated superior performance in oily wastewater treatment, suggesting their potential for solid waste utilization and oil wastewater treatment.
Large-scale application of ceramic membranes is restricted by high cost resulting from raw materials and sintering process. In this study, low-cost ceramic membranes were prepared with waste attapulgite (WAT) and alpha-Al2O3 as starting materials and used for oily wastewater treatment. The optimal membrane sintered at 1100 degrees C possessed excellent properties, with open porosity of 41.6%, flexural strength of 37.2 MPa and average pore size of 0.40 mu m. The membrane also displayed outstanding permeability and chemical stability. The hydrophilicity and underwater oleophobicity were enhanced after surface modification. When used for oil-in-water emulsion filtration, the permeate flux reached 236.8 L m(-2) h(-2) bar(-1) under a low transmembrane pressure of 0.2 bar and the oil rejection exceeded 99%. Membrane cleaning with a simple ultrasonic treatment could easily achieve flux recovery. This study proposed a feasible strategy for both solid waste utilization and oily wastewater treatment.
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