期刊
JOURNAL OF CLEANER PRODUCTION
卷 164, 期 -, 页码 831-839出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2017.06.230
关键词
Printed circuit board; Chemical interaction; Heavy-metal binding; Environmentally clean materials
The main purpose of this study was the development of new ceramic composites from three industrial wastes: printed circuit board, red mud from bauxite processing and steel slag, completely replacing clay and sand as traditional natural raw materials. Rectangular test specimens with 20 x 60 mm in size were compacted with 3 MPa pressure, dried and sintered at temperatures of 1000 degrees, 1050 degrees, 1100 degrees, 1150 degrees, 1200 degrees, 1250 degrees and 1275 degrees C for 3 h. The resulting ceramic flexural strength was 15.39 MPa; water absorption ranged between 4.47 and 38.45%; linear shrinkage, between 1.17 and 16.90% and bulk density, from 2.10 to 2.56 g/cm(3). The leaching and solubility tests show a reliable bonding of all metals until a level far above the requirements of Brazilian sanitary standards. (C) 2017 Elsevier Ltd. All rights reserved.
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