Preparation and Characterization of Organic Modified Sepiolite Sorbent by Microwave Radiation

Abstract:

Based on the pretreatment including acidification, purification and sodium ion exchange, the crude sepiolite was modified by microwave radiation-wet process and CTAB as modifier. The orthogonal experiment was used to optimize the modification process. Then the crude sepiolite and modified sepiolite were characterized by SEM, FTIR, XRD, TG-DSC and BET. The results showed that the optimum modification process parameters included CTAB dosage (1.0 cation exchange capacity (CEC)), microwave radiation time (4 minutes), ethanol concentration (50%/V:V) and radiation power (800W). Compared with crude sepiolite, oil removal rate from steel rolling wastewater increased from 41.34% to 96.78% with modified sepiolite prepared at the best process. Characteristic peaks of organic functional groups, enlarged interlayer distance (0.007nm larger than crude sepiolite), enhanced hydrophobicity, amplified specific surface area (104.4m2/g) and mesopore volume had been received from above characterization methods after modification. All of the above had proved that CTAB was successfully grafted onto sepiolite.

• Periodical: Advanced Materials Research (Volumes 211-212)
• Pages: 172-176
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.211-212.172
• Online since: February 2011
• Authors: Song Jiang Ma, Nian Fen Wu, Fang Wen Li, Juan Yang, Mei Ling Fu, Hai Wu Jia, Jing Xiao
• Keywords: Characterization, Microwave Radiation, Organic Modified, Sepiolite

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