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There are 12 papers published in subject: > since this site started. |
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1. Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions | |||
Liang Sha,Guo Xueyi,Feng Ningchuan,Tian Qinghua | |||
Metallurgical Engineering 24 January 2009 | |||
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Abstract:Pristine orange peel was chemically modified by introducing sulphur groups with the carbon disulfide treatment in alkaline medium. The presence of sulphur groups on orange peel xanthate were identified by FTIR spectroscopic study. Equilibrium isotherms and kinetics were obtained and the effect of various parameters including equilibrium pH, contact time, temperature and initial ion concentration on adsorption of Pb2+ were studied by batch experiments. The maximum adsorption capacity of orange peel xanthate was 204.50 mg•g-1, which was found to increase by about 150% compared to that of pristine orange peel. The adsorption process can attain equilibrium within 20 min, and kinetics was found to be best-fit pseudo-second order equation. Temperature has little effect on the adsorption capacity of orange peel xanthate. In addition, the adsorption mechanism was proposed. | |||
TO cite this article:Liang Sha,Guo Xueyi,Feng Ningchuan, et al. Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions[OL].[24 January 2009] http://en.paper.edu.cn/en_releasepaper/content/28314 |
2. Adsorption of copper and cadmium ions from aqueous solution by chemically modified orange peel | |||
Liang Sha,Guo Xueyi,Feng Ningchuan,Tian Qinghua | |||
Metallurgical Engineering 22 January 2009 | |||
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Abstract:The present article describes the adsorption behaviors of Cu2+ and Cd2+ on chemically modified waste orange peel. The adsorbents were characterized using scanning electron microscopy and infrared spectrophotometer. The effect of various parameters like solution pH, shaking time, initial metal ion concentration and temperature on adsorption efficiencies of these two metals were studied systematically by batch experiments.. Adsorption isotherms of these two metals on orange peel and chemically modified orange peel were obtained and compared with Langmuir and Freundlich type models. The rate of adsorption of Cu2+ and Cd2+ on chemically modified orange peel at a constant temperature (25 oC) found to follow a pseudo-second order equation, indicating their chemical adsorption. Temperature has a negative impact on Cu2+ adsorption, while Cd2+ adsorption found to be more or less independent of temperature. Maximum adsorption capacities of Cu2+ and Cd2+ on the chemically modified orange peel were found to be 70.67 and 136.05 mg/g, respectively. Adsorption–desorption studies made on chemically modified orange peel showed that, the adsorption capacities remain high until 5th cycle. This study demonstrated that, the waste orange peel after simple chemical treatment could be used as a potential adsorbent for toxic metals such as Cu and Cd. | |||
TO cite this article:Liang Sha,Guo Xueyi,Feng Ningchuan, et al. Adsorption of copper and cadmium ions from aqueous solution by chemically modified orange peel[OL].[22 January 2009] http://en.paper.edu.cn/en_releasepaper/content/28246 |
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