| 两种生物炭对Pb的吸附特性研究 |
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| 引用本文： | 杨婷婷,孟莉蓉,李晖,吴继阳,尹微琴,王圣森,侯建华,王小治.两种生物炭对Pb的吸附特性研究[J].农业环境科学学报,2017,36(8):1627-1633. |
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| 作者姓名： | 杨婷婷 孟莉蓉 李晖 吴继阳 尹微琴 王圣森 侯建华 王小治 |
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| 作者单位： | 1. 扬州大学环境科学与工程学院,江苏 扬州,225127;2. 扬州市环境保护局,扬州,225002;3. 扬州大学环境科学与工程学院,江苏 扬州 225127;江苏省有机固体废弃物资源化协同创新中心,南京 210095 |
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| 基金项目： | 江苏省社会发展项目（BE2015661）；江苏省六大人才高峰项目（2013-NY-017）；江苏省环境材料与环境工程重点实验室项目；江苏省研究生科研创新计划项目（SJLX16-0599） |
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| 摘 要： | 以木子壳、米糠为前驱体,650℃制备生物炭,通过扫描电子显微镜、X射线粉末衍射仪和比表面积分析仪等手段表征其物理化学性质,探究粒径、矿物组分、初始浓度及时间等因素对生物炭吸附Pb~(2+)效果的影响。结果表明,木子壳生物炭比表面积虽远小于米糠生物炭,但对溶液中Pb~(2+)有很强的吸附效果,等温吸附曲线符合Langmuir吸附模型,最大吸附量达165.62 mg·g~(-1),明显高于米糠生物炭(58.92 mg·g~(-1))。同时XRD分析显示木子壳生物炭含大量矿物组分且吸附Pb~(2+)后有沉淀生成。
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| 关 键 词： | 木子壳 生物炭 吸附 Pb2%2B |
| 收稿时间： | 2017/3/4 0:00:00 |
Adsorption of Pb by biochars derived from two types of biomass |
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| YANG Ting-ting,MENG Li-rong,LI Hui,WU Ji-yang,YIN Wei-qin,WANG Sheng-sen,HOU Jian-hua and WANG Xiao-zhi.Adsorption of Pb by biochars derived from two types of biomass[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2017,36(8):1627-1633. |
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| Authors: | YANG Ting-ting MENG Li-rong LI Hui WU Ji-yang YIN Wei-qin WANG Sheng-sen HOU Jian-hua and WANG Xiao-zhi |
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| Institution: | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China,College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China,Yangzhou Environmental Protection Bureau, Yangzhou, 225002,College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China,College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China,College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China,College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China and College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127, China;Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, 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 con-tained a large amount of mineral components and appeared as a precipitate after adsorption. |
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| Keywords: | camellia shell biochar adsorption Pb2+ |
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