| 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. |
| 两种生物炭对Pb的吸附特性研究 |
| Adsorption of Pb by biochars derived from two types of biomass |
| 投稿时间：2017-03-04 |
| DOI：10.11654/jaes.2017-0276 |
| 中文关键词: 木子壳 生物炭 吸附 Pb2+ |
| 英文关键词: camellia shell biochar adsorption Pb2+ |
| 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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| 中文摘要: |
| 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Pb2+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Pb2+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Pb2+后有沉淀生成。 |
| 英文摘要: |
| 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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