| 桑树杆生物炭铁锰氧化物复合吸附剂的制备及其对As(Ⅴ)的吸附机理研究 |
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| 引用本文： | 秦艳敏,梁美娜,王敦球,朱义年,唐沈,李欢欢,张涛.桑树杆生物炭铁锰氧化物复合吸附剂的制备及其对As(Ⅴ)的吸附机理研究[J].农业环境科学学报,2016,35(7):1398-1406. |
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| 作者姓名： | 秦艳敏 梁美娜 王敦球 朱义年 唐沈 李欢欢 张涛 |
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| 作者单位： | 桂林理工大学环境科学与工程学院,广西桂林541006;广西岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004 |
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| 基金项目： | 国家自然科学基金项目（21367010）；“八桂学者”建设工程专项经费资助 |
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| 摘 要： | 以桑树杆为原料,通过正交试验设计,利用氧化和共沉淀法制备桑树杆生物炭/铁锰氧化物复合吸附剂(MBFMA),考察p H值、离子强度、共存离子对吸附剂除As(Ⅴ)吸附性能的影响,并对MBFMA进行了表征,探讨了吸附机理。研究结果表明,制备复合吸附剂的最佳工艺为:KMn O4浓度40 g·L-1、Fe Cl2浓度40 g·L-1、浸渍时间24 h,煅烧温度400℃,煅烧时间3 h。在p H范围为2.0~7.0时,吸附剂对As(Ⅴ)的吸附效果最佳;硝酸根、硫酸根、碳酸根和磷酸根溶液对除砷效果有不同程度的影响,其中磷酸盐的影响最大,离子强度对除砷效果影响不大;与Freundlich相比,Langmuir模型能够较好地描述MBFMA对As(Ⅴ)的吸附行为,25℃下最大吸附量为4.87 mg·g-1。能谱分析表明吸附As(Ⅴ)的MBFMA含有0.34%的砷,FTIR定性分析表明羟基、羧基、内酯基是MBFMA表面的主要特征官能团,XPS分析表明铁、锰和表面含碳官能团参与了吸附反应,MBFMA对As(Ⅴ)的吸附是专性吸附。
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| 关 键 词： | 桑树杆 铁锰氧化物 制备 吸附 As(Ⅴ) |
| 收稿时间： | 2015/12/23 0:00:00 |
Preparation and arsenic adsorption and its mechanisms by mulberry stem biochar/Fe-Mn oxides composite adsorbent |
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| QIN Yan-min,LIANG Mei-n,WANG Dun-qiu,ZHU Yi-nian,TANG Shen,LI Huan-huan and ZHANG Tao.Preparation and arsenic adsorption and its mechanisms by mulberry stem biochar/Fe-Mn oxides composite adsorbent[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2016,35(7):1398-1406. |
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| Authors: | QIN Yan-min LIANG Mei-n WANG Dun-qiu ZHU Yi-nian TANG Shen LI Huan-huan and ZHANG Tao |
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| Institution: | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China,College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China,College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China,College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China,College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China,College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China and College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China;Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | |
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| Keywords: | mulberry stem Fe-Mn oxides preparation adsorption arsenic |
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