Heavy metals are widely used in industries. Then many enter the aquatic environment through wastewater discharges, which are known to be very toxic and carcinogenic. Therefore, the removal of heavy metals from wastewater is critical to environment protection. Usage of large quantities of wastes generated from processing of agricultural products, food, and/or wood may be an option to treat polluted water. Low-cost and abundance make them more attractive than conventional adsorbents. In this work, the preparation of new chelating materials from sugarcane bagasse has been studied. The obtained adsorbent was characterized by infrared spectroscopy. Adsorption capacities of the grafted sugarcane bagasse for Cu2+, Pb2+ and Ag+ions in aqueous single metal solution were evaluated by atomic absorption spectrometry. The adsorption was fast and reached equilibrium after 30 min for all kinds of ions. Maximum adsorption of metal ions was observed at about pH=5. Adsorption isotherms were studied by using Freundlich and Langmuir models. The equilibrium data were better fitted with Freundlich model than Langmuir model.Acknowledgements:  The authors sincerely thank the support from Special Fund for Forestry Scientific Research in the Public Interest (201104004), National Natural Science Foundation of China (31170540), Natural Science Fund of Jiangsu Province (BK2011111), and Special Fund of Central Scientific Institute (CAFINT2011C01).

Synthesis and adsorption properties of cellulose-based adsorbent

247th National Meeting (2014)

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