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| Adsorption of Pb by biochars derived from two types of biomass |
| Received:March 04, 2017 |
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| KeyWord:camellia shell;biochar;adsorption;Pb2+ |
| Author Name | Affiliation | E-mail | | YANG Ting-ting | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China | | | MENG Li-rong | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China | | | LI Hui | Yangzhou Environmental Protection Bureau, Yangzhou, 225002 | | | WU Ji-yang | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China | | | YIN Wei-qin | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China | | | WANG Sheng-sen | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China | | | HOU Jian-hua | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China | | | WANG Xiao-zhi | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China
Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China | xzwang@yzu.edu.cn |
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| Abstract: |
| Two raw materials, i.e., rice bran and camellia shell, were used to produce biochars via pyrolysis at 650℃. The physical and chemical properties of biochars were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), and Brunauer-Emmett-Teller(BET) surface area analyses. The effects of particle size, mineral composition, contact time, and initial Pb2+ concentration on Pb2+ adsorption by biochars were examined. The results showed that compared to rice bran-derived biochar, camellia shell-derived biochar had smaller specific surface area, but was more effective in removing heavy metals from aqueous solutions. The adsorption isotherm of Pb2+ by camellia shell-derived biochar fit the Langmuir model well, and the adsorption capacity was 165.62 mg·g-1, which was higher than that of rice bran-derived biochar(58.92 mg·g-1). The results of XRD analysis showed that camellia shell-derived biochar contained a large amount of mineral components and appeared as a precipitate after adsorption. |
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