Coagulation Performances of Cucurbit”8”uril in the Removal of Color from Acid Red1, Orangell, and Congo Red Wastewaters
Dye wastewater has attracted significant attention because of its wide pH range and high content of color.In this study, the coagulation performances of cucurbit”8”uril (CB”8”) in the removal of color from acid red 1 (AR1), orange Ⅱ (OII), and congo red (CR) dye wastewaters were investigated.Experimental results showed that color removal rates of greater than 95% for AR1, OⅡ and CR were achieved at pH 6.0, when the dosage of CB ”8” were i.51, 3.01 and 0.38 mmol· L-1, respectively.Under identical conditions, AR1 and CR, with larger molecular weight and more active hydroxyl (-OH) and amino (-NH2) groups, had higher color removal efficiencies.Moreover, the removal rates of AR1, OⅡ and CR increased gradually with the increase in ionic strength.Such an increase may be related to the decreased thickness of the surface solvent membrane surrounding the dye colloids at high ionic strength.FT-IR spectra demonstrated that new bonds or functional groups did not form during coagulation, which indicated that the removal ofAR1, OⅡ and CR was primarily a physical process.Further studies showed that the hydrogen bonds and inclusion complexes formed between CB”8” and ARI, OⅡ and CR mainly contributed to the removal of color in coagulation.
coagulation color removal cucurbit”8”uril dye wastewater ionic strength
Wang Wendong Chang Nini Shao Yue Yang Qin Wang Wen Wang Xiaochang Mawuli Dzakpasu
Department of Environmental and Municipal Engineering, Xi”an University of Architecture and Technolo Department of Chemical and Biomolecular Engineering, Rice University, Houston 77005, USA Department of Science, Xi”an University of Architecture and Technology, Xi”an Shanxi 710055, China
国内会议
青岛
英文
240-249
2016-06-27（万方平台首次上网日期，不代表论文的发表时间）