Preparation of a New Inorganic-Organic Composite Dual-Coagulant and Application of Oily Wastewater Treatment

Abstract:

A new inorganic-organic composite dual-coagulant (PAFC-CPAM) was prepared by polyaluminum ferric chloride (PAFC) and cationic polyacrylamide (CPAM) and its treatment efficiency for oily wastewater was evaluated by coagulation jar tests. PAFC-CPAM dual-coagulants were characterized by FT-infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The FTIR spectra illustrated that there were some chemical reactions between PAFC and CPAM in PAFC-CPAM. SEM micrographs testified that PAFC-CPAM formed compact net structure which is different from PAFC and CPAM, resulting to its outstanding coagulation performance other than monomeric coagulant in treating oily wastewater. Coagulation jar tests presented that PAFC-CPAM improved 1.14% and 0.38% of oil removal rate and reduced 0.35NTU and 0.06NTU of residual turbidity than PAFC and CPAM respectively at the optimal dosage of 120mg/L. PAFC-CPAM enhanced 4.56% and 2.12% of oil removal efficiency and decreased 0.27NTU and 0.01NTU of residual turbidity on average in comparison with PAFC and CPAM respectively in the pH range of 4.0-8.0. All of above-mentioned experiment results demonstrated that PAFC-CPAM behaved superior coagulation performance than PAFC and CPAM.

• Periodical: Advanced Materials Research (Volumes 233-235)
• Pages: 523-527
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.233-235.523
• Online since: May 2011
• Authors: Song Jiang Ma, Mei Ling Fu, Fang Wen Li, Nian Fen Wu, Juan Yang, Hai Wu Jia, Bing Wang, Rui Cheng
• Keywords: Cationic Polyacrylamide, Coagulation Jar Test, Coagulation Performance, Dual-Coagulant, Oily Wastewater, polyaluminum ferric chloride

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