Study on the Effect of Carboxyl Bagasse Hemicellulose on Heavy Metal Adsorption

Abstract:

In this paper, ions i.e. Cu²⁺, Pb²⁺and Cd²⁺ were absorbed by the carboxyl bagasse hemicelluloses, and the influences of pH value, adsorption time and the initial concentration of metal ion have been studied. The results show that the optimal adsorption pH values for Cu²⁺, Pb²⁺and Cd²⁺ are 5.5, 5.5 and 7.5, respectively. The adsorption capacity to ions Cu²⁺, Pb²⁺and Cd²⁺ reaches the maximum values when the adsorption time is 180 min. Net adsorption to ions Cu²⁺, Pb²⁺and Cd²⁺ increases with increasing the initial concentration of the metal ions. Analysis results of adsorption dynamics show that the adsorption of Cu²⁺, Pb²⁺and Cd²⁺ follows Ho 's Pseudo second-order kinetics linear model. It can be seen from the adsorption isothermal research that absorption of the carboxyl bagasse hemicelluloses to ions Cu²⁺, Pb²⁺and Cd²⁺ can be well described by the Langmuir isotherm linear model. Moreover, the theoretical values of the maximum absorption capacity qmax for ions Cu²⁺, Pb²⁺and Cd²⁺ were determined to be 20.28 mg/g, 82.64 mg/g and 30.58 mg/g, respectively.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 1630-1636
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.1630
• Online since: December 2011
• Authors: Li Jun Wang, Xin Liang Liu, Hong Xiang Zhu, Meng Ling Weng, Zhou Jun Li, Yi Guan Lu, Fu Sheng Wu, Shuang Fei Wang
• Keywords: Adsorption, Adsorption Dynamics, Adsorption Isotherm, Carboxyl Bagasse Hemicellulose, Heavy Metal

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