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| 稻壳活性炭制备及其对磷的吸附 | |
| 引用本文： | 李楠,单保庆,唐文忠,王玉军.稻壳活性炭制备及其对磷的吸附[J].环境工程学报,2013,7(3):1024-1028. |
| 作者姓名： | 李楠 单保庆 唐文忠 王玉军 |
| 作者单位： | 1. 山东农业大学资源与环境学院,泰安271018;中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085 2. 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085 3. 山东省高校农业环境重点实验室,泰安,271018 |
| 基金项目： | 村镇环境监测适宜关键技术研究(2012BAJ24B01) |
| 摘 要： | 利用农业废弃物稻壳经炭化、活化、酸洗、水洗和干燥等工艺制备出一种富含微孔和中孔结构的稻壳活性炭,其BET比表面积达886.3 m2/g。通过正交实验优化了稻壳活性炭对磷吸附条件,并在该条件下进行了吸附等温和吸附动力学实验研究。结果表明,稻壳活性炭对磷的吸附等温曲线能较好符合Langmuir模型(R2=0.9284)和Freundlich模型(R2=0.9208),由Langmuir线性拟合方程可得稻壳活性炭对磷饱和吸附量达6.93 mg/g;稻壳活性炭对磷的吸附过程可用准二级动力学方程描述(R2=0.9968),吸附速度较快,颗粒内扩散为该过程控速阶段。稻壳活性炭作为一种易得、廉价、高效的填料,在农村分散型污水生态处理技术中,具有良好的应用前景。 |
| 关 键 词： | 稻壳 活性炭 磷 吸附等温线 吸附动力学 |
Preparation of powder activated carbon by rice husks and its adsorption capacity to phosphorus |
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| Li Nan,Shan Baoqing,Tang Wenzhong and Wang Yujun.Preparation of powder activated carbon by rice husks and its adsorption capacity to phosphorus[J].Techniques and Equipment for Environmental Pollution Control,2013,7(3):1024-1028. | |
| Authors: | Li Nan Shan Baoqing Tang Wenzhong and Wang Yujun |
| Institution: | 1. College of Resource and Environment, Shandong Agricultural University, Taian 271018, China;2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 10085, China;2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 10085, China;2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 10085, China;3. Key Laboratory of Agricultural Environment in Universities of Shandong, Taian 271018, China |
| Abstract: | Powder activated carbon (PAC) with rich microporous structure was prepared from rice husks by carbonizing, activating, pickling, washing and drying, and its specific surface area (BET) was 886.3 m2/g. The adsorption process of PAC to phosphorus (P) was studied. The results showed that the adsorption isotherm could be described by both Langmuir model (R2 = 0.9284) and Freundlich model (R2 = 0.9208), and the saturated adsorption capacity reached 6.93 mg/g. The adsorption process of PAC to P could be described by pseudo second-order kinetic equation (R2 = 0.9968), and the rate of adsorption was under the control of intra-particle diffusion. PAC, as available, cheap and efficient matrix filler, has bright prospects in ecological treatment technologies of rural sewage. |
| Keywords: | rice husks powder activated carbon phosphorus adsorption isotherm adsorption kinetics |
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