| 纳米磺化石墨烯用于异位洗脱污染土壤多环芳烃工艺的优化 |
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| 作者姓名： | GAN Xinhong TENG Ying REN Wenjie MA Jun Peter CHRISTIE LUO Yongming |
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| 摘 要： | Ex-situ soil washing technology offers advantages such as speed and efficiency of remediation and range of application and has been developed to conform with legal requirements and best management practices in USA and some European countries. In this study,nano-sulfonated graphene(SGE) was used as a washing agent to evaluate different processing(washing) parameters for the ectopic leaching removal of polycyclic aromatic hydrocarbons(PAHs) from a coking plant soil. X-ray photoelectron spectroscopy(XPS) and fourier transform infrared spectroscopy(FTIR) were used to analyze the characteristics of the SGE tested. The results showed that SGE had a strong adsorption capacity for PAHs through the role of π-π, H-π, and anion-π interactions. The washing parameters, an SGE concentration of 2 000 mg L~(-1), a liquid/soil(L/S) ratio of 10:1, and 4 cycles of successive washing, were set to arrive to the optimum condition for achieving more than 80% of PAH removal. Under the optimum condition, the PAH removal rate decreased with increasing ring numbers. After one washing cycle at SGE concentration of 2 000 mg L~(-1) and L/S ratio of 10:1, the PAH removal rate of the SGE tested was much higher than that of Tween 80(TW80) or methyl-β-cyclodextrin(MCD)(P 0.01). Therefore, SGE is a promising material for the nanoremediation of PAH-contaminated soils.
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| 关 键 词： | adsorption capacity leaching mechanism nanoremediation optimum condition washing agent washing parameter |
| 收稿时间： | 2017/1/17 0:00:00 |
| 修稿时间： | 2017/4/12 0:00:00 |
Optimization of ex-situ washing removal of polycyclic aromatic hydrocarbons from a contaminated soil using nano-sulfonated graphene |
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| GAN Xinhong,TENG Ying,REN Wenjie,MA Jun,Peter CHRISTIE,LUO Yongming.Optimization of ex-situ washing removal of polycyclic aromatic hydrocarbons from a contaminated soil using nano-sulfonated graphene[J].Pedosphere,2017,27(3):527-536. |
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| Authors: | GAN Xinhong TENG Ying REN Wenjie MA Jun Peter CHRISTIE and LUO Yongming |
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| Institution: | 1. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;University of Chinese Academy of Sciences, Beijing 100049 China;2. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;3. College of Materials and Chemistry, Tongren University, Tongren 554300 China |
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| Abstract: | Ex-situ soil washing technology offers advantages such as speed and efficiency of remediation and range of application and has been developed to conform with legal requirements and best management practices in USA and some European countries. In this study, nano-sulfonated graphene (SGE) was used as a washing agent to evaluate different processing (washing) parameters for the ectopic leaching removal of polycyclic aromatic hydrocarbons (PAHs) from a coking plant soil. X-ray photoelectron spectroscopy (XPS) and fourier transform infrared spectroscopy (FTIR) were used to analyze the characteristics of the SGE tested.The results showed that SGE had a strong adsorption capacity for PAHs through the role of $\uppi-\uppi$, H-uppi, and anion-uppi interactions. The washing parameters, an SGE concentration of 2000 mg L-1, a liquid/soil (L/S) ratio of 10:1, and 4 cycles of successive washing, were set to arrive to the optimum condition for achieving more than 80% of PAH removal.Under the optimum condition, the PAH removal rate decreased with increasing ring numbers.After one washing cycle at SGE concentration of 2000 mg L-1 and L/S ratio of 10:1, the PAH removal rate of the SGE tested was much higher than that of Tween 80 (TW80) or methyl-beta-cyclodextrin (MCD) ($P<0.01$).Therefore, SGE is a promising material for the nanoremediation of PAH-contaminated soils. |
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| Keywords: | adsorption capacity leaching mechanism nanoremediation optimum condition washing agent washing parameter |
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