| 功能化材料Zr@AC对水中难降解农药阿特拉津的去除特征 |
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| 引用本文： | 刘勇攀,张衿潇,蒋燕虹,何慧军,刘杰,吴婷,程燕.功能化材料Zr@AC对水中难降解农药阿特拉津的去除特征[J].环境科学研究,2022,35(3):750-760. |
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| 作者姓名： | 刘勇攀 张衿潇 蒋燕虹 何慧军 刘杰 吴婷 程燕 |
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| 作者单位： | 1.桂林理工大学，广西环境污染控制理论与技术重点实验室，广西 桂林 541004 |
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| 基金项目： | 广西科技计划项目(No.桂科AD19110105,桂科AD21075005,桂科AD19110090)~~； |
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| 摘 要： | 我国农药阿特拉津的污染十分严重，对生态系统造成了非常不利的影响. 为了实现对水环境中阿特拉津的高效去除和吸附剂的重复利用，该研究通过溶液浸渍和高温煅烧技术将金属锆负载到活性炭上，制备出功能化材料Zr@AC，使用扫描电镜(SEM)、X射线衍射仪(XRD)、傅里叶变换红外吸收光谱仪(FTIR)和比表面及孔径分析仪(BET)对材料的形貌和组成进行了表征，并考察了Zr@AC对水中阿特拉津的去除效果. 结果表明:①当浸渍液锆离子的质量分数为7.0%、浸渍时间为9.0 h、煅烧温度为500 ℃和煅烧时间为5.0 h时，制备的Zr@AC具有较大的比表面积、较多的中孔和微孔以及丰富的活性位点. ②对阿特拉津的去除研究表明，当溶液pH为4.0、温度为25 ℃、Zr@AC投加量为60.0 mg/L时，经过90 min的反应，Zr@AC对阿特拉津的吸附容量最大，达到93.8 mg/g. ③动力学模拟研究表明，该吸附过程遵循拟二级动力学模型，且Freundlich等温吸附模型的拟合结果要优于Langmuir等温吸附模型，说明Zr@AC对阿特拉津的吸附存在化学吸附和多分子层吸附的双重作用. ④经过5次重复试验后，Zr@AC对阿特拉津的去除率仍有83.9%. 研究显示，Zr@AC可作为水中去除阿特拉津的吸附剂，是一种很有前途、可重复多次使用的材料.
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| 关 键 词： | 阿特拉津 锆 活性炭 去除机理 |
| 收稿时间： | 2021-05-26 |
Removal Characteristics of Refractory Pesticide Atrazine from Water by Functionalized Material Zr@AC |
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| LIU Yongpan,ZHANG Jinxiao,JIANG Yanhong,HE Huijun,LIU Jie,WU Ting,CHENG Yan.Removal Characteristics of Refractory Pesticide Atrazine from Water by Functionalized Material Zr@AC[J].Research of Environmental Sciences,2022,35(3):750-760. |
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| Authors: | LIU Yongpan ZHANG Jinxiao JIANG Yanhong HE Huijun LIU Jie WU Ting CHENG Yan |
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| Affiliation: | 1.Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China2.College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China3.Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China4.Xingzhi College, Zhejiang Normal University, Jinhua 321000, China |
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| Abstract: | The pollution of pesticide atrazine is very serious in China and has severely affected the ecosystem. In order to effectively remove atrazine from water and reuse adsorbents, a functionalized material Zr@AC was prepared by loading zirconium on activated carbon (AC) via solution impregnation and high-temperature calcination. The morphology and composition of the material were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared absorption spectrometer (FTIR) and porosity analyzer (BET), and the removal of atrazine by Zr@AC in water was also investigated. The results showed that: (1) The prepared Zr@AC had a large specific surface, many mesopores and micropores, and a lot of active sites, when the preparation conditions were 7.0% Zr4+ impregnating solution, impregnation time 9.0 h, calcination temperature 500 ℃, and calcination time 5.0 h. (2) The batch adsorption studies of atrazine on Zr@AC showed the maximum adsorption capacity was 93.8 mg/g at 25 ℃ when the solution pH was 4.0, the material dosage was 60.0 mg/L and reaction time was 90 min. (3) The kinetic studies showed that the pseudo-second-order kinetic model was suitable to fit the adsorption process, and the Freundlich isothermal adsorption model was better than the Langmuir isothermal adsorption model, indicating that chemical adsorption and multi-layer adsorption were the main mechanisms of the adsorption process. (4) After five cycles of adsorption experiments, the removal efficiency of atrazine by Zr@AC still retained 83.9%. In conclusion, Zr@AC composite material can be used as adsorbent to effectively remove atrazine in water, and it is a promising and reusable composite material. |
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