石油化工高等学校学报

石油化工高等学校学报 ›› 2022, Vol. 35 ›› Issue (3): 54-62.DOI: 10.3969/j.issn.1006-396X.2022.03.009

• 替代燃料及新材料 • 上一篇    下一篇

零价铁/阳离子表面活性剂/生物炭对水体Cr(VI)的吸附研究

艾丹1(), 魏太庆1, 孟阳1, 高易2, 栾伟宇2, 王博1()   

  1. 1.辽宁石油化工大学 环境与安全工程学院,辽宁 抚顺 113001
    2.东北石油管道有限公司,辽宁 沈阳 110031
  • 收稿日期:2021-11-10 修回日期:2022-03-08 出版日期:2022-06-25 发布日期:2022-07-25
  • 通讯作者: 王博
  • 作者简介:艾丹(1994⁃),女,硕士研究生,从事环境修复材料方面的研究;E⁃mail:eidan@foxmail.com
  • 基金资助:
    国家自然科学基金资助项目(41977074);辽宁省教育厅科学研究经费项目(LJKZ0382)

Study on Adsorptionzero Effect of Zero⁃Valent Iron/Cationic Surfactant/Biochar on Cr(VI)

Dan Ai1(), Taiqing Wei1, Yang Meng1, Yi Gao2, Weiyu Luan2, Bo Wang1()   

  1. 1.School of Environmental & Safety Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China
    2.Northeast Petroleum Pipeline Co. ,Ltd. ,Shenyang Liaoning 110031,China
  • Received:2021-11-10 Revised:2022-03-08 Online:2022-06-25 Published:2022-07-25
  • Contact: Bo Wang

摘要:

以常见柳条为生物炭原料,通过十六烷基三甲基氯化铵(CTMAC)进行阳离子表面活化,与零价铁、海藻酸钠混合制备了零价铁/阳离子表面活性剂/生物炭(Fe0?MBC)凝胶微球,探讨了其对水体Cr(VI)的吸附能力。借助XRF、FTIR、XRD以及Zeta电位等分析手段,对Fe0?MBC凝胶微球的结构与性能进行研究。通过分析反应时间、环境温度及pH对吸附的影响,在吸附动力学、等温线模型的基础上,初步探讨了吸附机制。通过吸附?解析循环实验,研究了Fe0?MBC凝胶微球的再生性能。结果表明,Fe0?MBC凝胶微球对Cr(VI)的吸附与准一级动力学和Langmuir等温吸附模型拟合度较高;Cr初始质量浓度100 mg/L、负载质量分数分别为5%和10%的零价铁的CTMAC活化生物炭对Cr(VI)的去除率在2 h时分别为89%、97%,最大饱和吸附量分别为33.777 9、42.562 0 mg/g;Fe0?MBC凝胶微球作为一种成本低、效率高的环境功能材料,对去除废水中的Cr(VI)具有良好的应用前景。

关键词: 生物炭, 阳离子表面活性剂, 零价铁, Cr(VI), 吸附

Abstract:

Common wicker,the raw material of biochar,was treated by hexadecyltrimethylammonium chloride (CTMAC) for cationic surface activation,and then it was mixed with zero?valent iron and sodium alginate to prepare zero?valent iron/cationic surfactant/biochar (Fe0?MBC) gel microspheres, and their ability to adsorb Cr(VI) in water was discussed.The structure and properties of Fe0?MBC gel microspheres were studied by means of XRF,FTIR,XRD and Zeta potential.Upon the analysis of the effects of the reaction time,temperature and pH value on adsorption,the adsorption mechanism was preliminarily discussed on the basis of adsorption kinetics and the isotherm model.The results indicate that the adsorption effect of Fe0?MBC gel microspheres on Cr(VI) is highly fitted with that of pseudo?first?order kinetics and the Langmuir isothermal adsorption model. The removal rates of Cr(VI) by CTMAC?activated biochar loaded with 5% zero?valent iron and CTMAC?activated biochar loaded with 10% zero?valent iron can reach 89% and 97% (initial Cr concentration of 100 mg/L) at 2 h, respectively, and the maximum saturated adsorption capacities are 33.777 9 mg/g and 42.562 0 mg/g, respectively.The experimental results reveal that Fe0?MBC gel microspheres, as a low?cost and high?efficiency environmental functional material, have good application prospects for the removal of Cr(VI) in wastewater.

Key words: Biochar, Cationic surfactant, Zero?valent iron, Cr(VI), Adsorption

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