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aluminum formate(AF): Synthesis, characterization and application in dye wastewater treatment

Journal of Environmental Sciences 2018年第12期30卷 95-106页

作者： Moxi Xue Baoyu Gao Ruihua Li Jianzhang Sun Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University

aluminum formate（AF）, a degradable and non-corrosive coagulant, was synthesized from aluminum hydroxide and formic acid. Polyamidine（PA）, as a coagulation aid, was combined with AF for dye wastewater treatment. AF was characterized by XPS, FT-IR, viscosity, zeta potential, mass spectrum and XRD, and the flocculation properties of the dual-coagulation system were characterized by FT-IR and SEM. The results showed that COOH, Al2 O3-Al and O2-Al bonds were formed in the AF synthesis process, and AF had a higher molecular weight and higher charge neutralization ability than PAC. The hydrolysates of AF were determined to contain Al（13）Al（11） and Al2, and the components of AF were confirmed to comprise a mixture including aluminum formate（C3H3AlO6） and its hydrate. When the color removal efficiency reached 100% in jar tests, the optimized dosage of AF/PA was 18.91/0.71 mg/L,while the optimized dosage of PAC/PA was 21.19/0.91 mg/L. According to the variance analysis, the interaction between AF/PA and PAC/PA were insignificant in macroscopic view. FT-IR spectrum indicated AF captured pollutant by means of CCO bond, PAC captured pollutant by δ CH, ／CC／ and δ CH. Overall, although the coagulation mechanism of AF was different from that of PAC, AF/PA showed better coagulation efficiency than PAC/PA in dye wastewater treatment.

关键词： aluminum formate Polyamidine Dual-coagulation Phase analysis Interaction

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