期刊
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
卷 169, 期 -, 页码 111-118出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.minpro.2017.11.005
关键词
Red Mud; Kaolin; Sodium silicate; Acrylic hydrogels; Hybrid materials; Wastes recovery
资金
- UEFISCDI through the Romanian Research Project [PN II 78/2014]
- [PN.16.31.02.01]
The present paper was aimed at developing innovative hybrid composites by using cheap filler, like red mud (RM). The study importance refers to RM recycling, a recent trend in environmental science. Besides its causticity, large amounts of RM are produced yearly, calling for recovery measurements. Herein, poly (acrylic acid)- based inorganic-organic hybrid hydrogels (PAA hydrogels) incorporating RM were synthesized.& para;& para;Furthermore, the possibility of involving inorganic additives (kaolin and/or sodium silicate) together with RM was investigated. Incorporation of all three inorganic compounds (RM + Kaol + Sil) in hydrogels was also evaluated, novel hybrids being prepared. The obtained hybrids were characterized by different techniques (DR UV-VIS; DRIFT; TGA/DTG; SEM) and in terms of swelling behavior. DRIFT and DR UV-VIS confirmed the occurrence of characteristic bands of raw materials. Final properties (water uptake, thermal stability, porosity) can be controlled by modifying preparation conditions. Hydrogels yielded, by calcinations, iron- rich ceramic foams, able to promote water removal of sulfide ions from wastewaters. (C) 2017 Elsevier B.V. All rights reserved.
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