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| Heavy metal content of the rural solid waste and its land utilization environmental risk analysis |
| Received:December 12, 2016 |
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| KeyWord:rural living solid waste;heavy metal content;potential ecological risk |
| Author Name | Affiliation | E-mail | | WANG Yu-tang | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Research Academy of Environmental Sciences, Beijing 100012, China | | | ZHANG Jun | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China | zhangjuny2010@163.com | | YUE Bo | Research Academy of Environmental Sciences, Beijing 100012, China | yuebo@craes.org.cn | | WANG Dun-qiu | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China | | | YU Jun-ying | Research Academy of Environmental Sciences, Beijing 100012, China | | | HUANG Qi-fei | Research Academy of Environmental Sciences, Beijing 100012, China | | | WU Xiao-hui | Research Academy of Environmental Sciences, Beijing 100012, China | | | JIN Qi | Research Academy of Environmental Sciences, Beijing 100012, China | |
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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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