The Adsorption Of Acid Dyes In Printing And Dyeing Wastewater Based On Supramolecular Interaction Of Cucurbituril

China is the largest producer and consumer of acid dyes in the world,dyes effluents have threaten badly the water security.Due to the stable structure of acid dyes,it is very difficult to eliminated by physical/chemical as well as biological treatment.Adsorption is growing in popularity due to its potential for rapid treatment and producing high quality treated waters.In our previsou resarach,it has been found that cucurbiturils have preferable adsorption performance.In this thesis,cucurbiturils were used as efficient adsorbents to remove acid dyes in the dyeing and printing effluents.In this thesis,the influcece factors,adsorption behavior and mechanism of the aciddyes who have azo structure on cucurbit[6]uril?CB[6]?and cucurbit[8]uril?CB[8]?were investigated.The results shows that the adsorption of acid red 27 dye onCB[6] could reach the adsorption equilibrium in 50 min and the removal rate of dye is 80%.Raising the temperature is not conducive to the adsorption.Alkaline conditions promote adsorption,and acidic conditions inhibit adsorption.The presence of metal ions(K⁺,Ga²⁺,Na⁺,Mg²⁺improves the adsorption efficiency.The adsorption of acid red 27 dye onCB[8]is more efficient,and the adsorption equilibrium could be reached within 30 min.The maximum adsorption capacity is 332.2 mg / g and the dye removal rate is 99%.The presence of metal ions(K⁺,Ga²⁺,Na⁺,Mg²⁺inhibit the adsorption efficiency.The adsorptions of acid red 27 on CB[6] and CB[8] are monolayer Langmuir isotherm adsorption.?G₀<0,?H₀<0 and ?S₀<0 reveals that the adsorption process is spontaneous and is an enthalpy-driven process.The adsorptions of acid red 27 on CB[8] and CB[6] are dominated by the pseudo-second-order kinetic model.FT-IR and TG reveals that the formation of inclusion complex is the main driving force of adsorption.The adsorption of acid orange 7 dye onCB[6] could reach the adsorption equilibrium in 60 min and the removal rate of dye is45%.Raising the temperature is not conducive to the adsorption.Alkaline conditions promote adsorption,and acidic conditions inhibit adsorption.The presence of metal Ga²⁺,Mg²⁺couldimprove the adsorption efficiency,but K⁺,Na⁺inhibit the adsorption efficiency.The adsorption of acid orange 7 on CB[6]is monolayer Langmuir isotherm adsorption.The adsorption of acid orange 7 dye onCB[8] could reach the adsorption equilibrium in 30 min,and the removal rate of dye is82%.The presence of metal ions(K⁺,Ga²⁺,Na⁺,Mg²⁺)inhibit the adsorption efficiency.The adsorption of acid orange 7 on CB[8]isFreundlich isotherm adsorption.?G0<0,?H₀<0 and ?S₀<0 reveals that the adsorption process is spontaneous and is an enthalpy-driven process.The adsorptions of acid orange 7 on CB[8] and CB[6] are dominated by the pseudo-second-order kinetic model.FT-IR and TG reveal that the formation of inclusion complex is the main driving force of adsorption.The results show that cucurbiturils can be used as an efficient adsorbent for removing acid dyes in the dyes effluents.The thesis will provide a theoretical guidance for the further research and application of cucurbiturils in the treatment of textile effluents.