Study On Treatment Of Dye Wastewater By Surface Modified Activated Carbon

Water pollution is serious in China. The efficient and clean governance approach is one of the important challenges the current science and technology workers face. The purpose of the paper was to explore a more energy efficient treatment way of dyeing wastewater and to reduce waste water pollution in order to protect the ecological environment.The paper studied the characteristics of activated carbon’s static adsorption and explored the influence of the initial concentration of methylene blue, oscillation time, adding amount and temperature on the adsorption process, at the same time, the adsorption kinetics and adsorption isotherm of activated carbon have been conducted, indicated that the adsorption of methylene blue onto activated carbon was spontaneous and chemical reaction. The pseudo second order kinetics model fited the experimental data well and adsorption rate limiting step was film diffusion. The paper studied the effects of holding temperature, holding time, heating rate, impregnation concentration and impregnation time on adsorption ability of Cu-activated carbon, indicated that the methylene blue adsorption capacity of Cu-activated carbon using conventional heating method was 270mg/g under optimal conditions such as 450 ℃ of holding temperature, 40min of holding time,25℃/min of heating rate, 0.1mol/L of impregnation concentration and 12h of impregnation time. The paper studied the characteristics of Cu-activated carbon’s static adsorption and explored the influence of the initial concentration of methylene blue, oscillation time, adding amount and temperature on the adsorption process, at the same time, the adsorption kinetics and adsorption isotherm of Cu-activated carbon have been conducted, indicated that the adsorption of methylene blue onto Cu-activated carbon was spontaneous and chemical reaction. The pseudo second order kinetics model fited the experimental data well and adsorption rate limiting step was film diffusion.The paper studied the effects of microwave temperature, microwave time, microwave power, impregnation concentration and impregnation time on adsorption ability of Cu-activated carbon using microwave heating method, indicated that the methylene blue adsorption capacity of Cu-activated carbon was 307.5mg/g under 800 ℃ of microwave temperature,20min of microwave time,300W of microwave power, O.lmol/L of impregnation concentration and 12h of impregnation time. The paper studied the characteristics of Cu-activated carbon’s static adsorption and explored the influence of the initial concentration of methylene blue, oscillation time, adding amount and temperature on the adsorption process, at the same time, the adsorption kinetics and adsorption isotherm of Cu-activated carbon have been conducted, indicated that the adsorption of methylene blue onto Cu-activated carbon was also spontaneous and chemical reaction. The pseudo second order kinetics model fited the experimental data well and adsorption rate limiting step was also film diffusion. Moreover, activated carbon has been characterized by FTIR, SEM, XRD and so on. The studies indicated that comparing with raw activated carbon, the optimal methylene blue adsorption capacity of Cu-activated carbon using conventional heating method increased more than 33.66%. Comparing with raw activated carbon, the optimal methylene blue adsorption capacity of Cu-activated carbon using microwave heating method increased more than 52.23%. Moreover, comparing with the Cu-activated carbon using conventional heating method, the optimal methylene blue adsorption capacity of Cu-activated carbon using microwave heating method increased more than 13.89%. Experimental results indicated that copper-loading processing of activated carbon can improve its methylene blue adsorption capacity to a certain extent.