| 活性炭对非离子型表面活性剂中菲的吸附效能 |
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| 引用本文： | 刘剑飞,张 新.活性炭对非离子型表面活性剂中菲的吸附效能[J].环境科学研究,2015,28(9):1481-1486. |
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| 作者姓名： | 刘剑飞 张 新 |
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| 作者单位： | 1.河南理工大学土木工程学院, 河南 焦作 454003 ;北京师范大学环境学院, 北京 100875 |
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| 基金项目： | 北京市自然科学基金项目(8122027)；河南理工大学博士基金资助项目(B2015-62) |
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| 摘 要： | 为研究表面活性物质与疏水有机物的分离效能,以TX100(曲拉通100)为代表性的非离子型表面活性剂,以PHE(菲)为代表性的多环芳烃,使用活性炭对二者共存体系进行静态吸附和固定床吸附. 静态吸附结果表明,活性炭对TX100和PHE的吸附均满足Langmuir等温吸附模型和准二阶动力学模型,吸附量分别为437.31和58.86 mg/g. 固定床吸附时,对应于14.7 cm的活性炭柱高,PHE穿透10%和TX100穿透90%的时间分别是420和270 min,从BDST(bed depth service time)模型中可以得到TX100传质区长度小于PHE,这为二者分离提供了条件. 通过活性炭固定床吸附可以在回收90%TX100的同时去除90%PHE,说明吸附法是一种回收表面活性剂的有效方法. 利用微波法再生活性炭,可使购置活性炭的成本降低4/5,进一步提高了回收法的经济性和可行性. 研究表明,活性炭吸附是一种可用于土壤洗涤工艺中回收表面活性剂的有效方法.
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| 关 键 词： | 表面活性剂 多环芳烃 活性炭 吸附 |
Adsorption of Phenanthrene Dissolved in Nonionic Surfactant Solution by Activated Carbon |
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| LIU Jianfei and ZHANG Xin.Adsorption of Phenanthrene Dissolved in Nonionic Surfactant Solution by Activated Carbon[J].Research of Environmental Sciences,2015,28(9):1481-1486. |
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| Authors: | LIU Jianfei and ZHANG Xin |
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| Affiliation: | 1.School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China ;School of Environment, Beijing Normal University, Beijing 100875, China2.College of Chemical Engineering, Pingdingshan Industrial College of Technology, Pingdingshan 467001, China |
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| Abstract: | Abstract: To study the separation efficiency of hydrophobic organic compounds from surfactant solutions, Triton X-100 (TX100) was chosen as a nonionic surfactant, and phenanthrene (PHE) was selected as a representative polycyclic aromatic hydrocarbon. Batch and fixed-bed adsorption experiments of TX100 and PHE-containing solution were conducted using activated carbon. The experimental data of both TX100 and PAH could be fitted well by the Langmuir isotherm model and the pseudo-second order kinetic model. The adsorption capacities of activated carbon were 437.31 and 58.86 mg/g for TX100 and PHE, respectively. In an experiment of fixed activated carbon beds with a height of 14.7 cm, the 10% breakthrough time of PHE and the 90% breakthrough time of TX100 were 420 and 270 min, respectively. According to the bed depth service time model, the height of the exchange zone of TX100 should be much shorter than that of PHE, making the separation of the two compounds possible. The results suggest that adsorption by the fixed activated carbon bed could remove approximately 90% of PHE and recover approximately 90% of surfactant, indicating that adsorption is an effective way to recover surfactant. Regeneration of activated carbon by treatment of microwave irradiation could reduce 4/5 of the total cost, thereby ensuring its economic and environmental acceptability. Overall, adsorption by activated carbon is an effective method for surfactant recovery in the soil-washing process. |
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| Keywords: | surfactant polycyclic aromatic hydrocarbon activated carbon adsorption |
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