过硫酸盐氧化地下水中BTEX效果及水化学响应
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摘要
过硫酸盐(S_2O_8~(2-))在修复地下水有机污染方面得到广泛应用。为揭示过硫酸盐氧化处理汽油BTEX污染地下水的效果及其向生物降解转化的特征,以过硫酸钠为氧化剂,建立含水箱柱系统模拟场地汽油BTEX污染地下水的原位化学氧化修复。结果表明,含水层中内在生物作用对高浓度BTEX的降解作用不理想;过硫酸盐对处理地下水BTEX污染有一定的效果,当PS/BTEX(摩尔比)=20时,氧化效果明显,其中苯浓度的衰减系数最大,能使难生物降解的苯优先去除。pH、ORP值、NO_3~-等水化学指标的改变能反映化学氧化作用向生物降解作用转化,是比较理想的过渡特征指标。
Persulfate(S_2 O_8~(2-)) was widely used in the remediation of organic contaminated groundwater. In order to reveal the effect of persulfate oxidation treatment on fuel contaminated groundwater and the transitional features of oxidation to biodegradation, a system of aquifer sand box and column was developed for in situ remediation of fuel contaminated groundwater,using persulfate as the oxidant. The experimental results indicated that the biodegradation of high concentration BTEX in aquifer was not ideal, and the persulfate worked well in treating BTEX contaminated groundwater. When PS/BTEX in molar ratio of 20, the experimental result was the best, and the attenuation coefficient of benzene concentration was the largest, which made the benzene which was difficult to biodegrade preferentially removed. The pH, ORP, NO_3~- and other hydrochemistry indexes could reflect the conversion oxidation to biodegradation, which were ideal transition indicators.
Persulfate(S_2 O_8~(2-)) was widely used in the remediation of organic contaminated groundwater. In order to reveal the effect of persulfate oxidation treatment on fuel contaminated groundwater and the transitional features of oxidation to biodegradation, a system of aquifer sand box and column was developed for in situ remediation of fuel contaminated groundwater,using persulfate as the oxidant. The experimental results indicated that the biodegradation of high concentration BTEX in aquifer was not ideal, and the persulfate worked well in treating BTEX contaminated groundwater. When PS/BTEX in molar ratio of 20, the experimental result was the best, and the attenuation coefficient of benzene concentration was the largest, which made the benzene which was difficult to biodegrade preferentially removed. The pH, ORP, NO_3~- and other hydrochemistry indexes could reflect the conversion oxidation to biodegradation, which were ideal transition indicators.
引文
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[13]刘佳露,卢伟,张凤君,等.活化过硫酸盐氧化地下水中苯酚的动力学研究[J].中国环境科学,2015,35(9):2677-2681.Liu Jialu,Lu Wei,Zhang Fengjun,et al.Kinetics study of activated persulfate oxidation of phenol in ground water[J].China Environment Science,2015,35(9):2677-2681.
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[15]迟金磊,蒋亚萍,陈余道,等.石灰岩含水介质中苯系物(BTEX)生物可降解性判识[J].高校地质学报,2014(3):476-481.Chi Jinlei,Jiang Yaping,Chen Yudao,et al.Potential biodegradability of BTEX in the aqueous solution containing limestone[J].Geological Journal of China Universities,2014(3):476-481.
[16]蒋亚萍,黄宗万,陈余道,等.石油类污染含水砂柱中BTEX的自然衰减与厌氧生物降解特征[J].桂林理工大学学报,2005,25(2):229-233.Jiang Yaping,Huang Zongwan,Chen Yudao,et al.Natural attenuation and anaerobic biodegradation of BTEX compounds in groundwater contaminated by petroleum hydrocarbons[J].Journal of Guilin University of Technology,2005,25(2):229-233.
[17]Sra K S,Thomson N R,Barker J F.Persulfate injection into a gasoline source zone[J].Journal of Contaminant Hydrology,2013,150(5):35-44.
[18]Chapelle F H.Bioremediation of petroleum hydrocarboncontaminated ground water:the perspectives of history and hydrology[J].Ground Water,2010,37(1):122-132.
[19]Peng YP,Chen KF,Lin WH,et al.A novel three-stage treatment train for the remediation of trichloroethylene-contaminated groundwater[J].Rsc Advances,2016,6(47):41247-41260.
[2]Chen YD,Jiang YP,Zhu YN,et al.Fate and transport of ethanol-blended dissolved BTEX hydrocarbons:a quantitative tracing study of a sand tank experiment[J].Environmental Earth Sciences,2013,70(1):49-56.
[3]Sutton N B,Grotenhuis J T C,Langenhoff A A M,et al.Effort to improve coupled in situ chemical oxidation with bioremediation:a review of optimization strategies[J].Journal of Soils&Sediments,2011,11(1):129-140.
[4]Fedrizzi F,Débora T Ramos,Lazzarin H S C,et al.A modified approach for in situ chemical oxidation coupled to biodegradation enhances light nonaqueous phase liquid sourcezone remediation[J].Environmental Science and Technology,2017,51(1):463-472.
[5]Eva Kakosová,Pavel Hrabák,J Popelka,et al.Effect of various chemical oxidation agents on soil microbial communities[J].Chemical Engineering Journal,2017,314:257-265.
[6]Sra K S,Thomson N R,Barker J F.Persistence of persulfate in uncontaminated aquifer materials[J].Environmental Science and Technology,2010,44(8):3098-3104.
[7]Sra K S,Thomson N R,Barker J F.Persulfate treatment of dissolved gasoline compounds[J].Journal of Hazardous Toxic&Radioactive Waste,2013,17(1):9-15.
[8]潘勇军,陈余道,蒋亚萍,等.岩溶地下河入口洞穴固结土对BTEX吸附-解吸研究[J].环境科学与技术,2016,39(11):52-57.Pan Yongjun,Chen Yudao,Jiang Yaping,et al.Adsorption/desorption of BTEX by consolidated soil collected from a karst underground river cave[J].Environmental Science&Technology,2016,39(11):52-57.
[9]童奇玲,蒋亚萍,陈余道.运用批实验研究溶解氧对米酒去除硝酸盐的影响[J].环境工程,2017,35(10):44-49.Tong Qiling,Jiang Yaping,Chen Yudao.Batch experiments for the effect of dissolved oxygen on nitrate removal with rice wine[J].Environmental Engineering,2017,35(10):44-49.
[10]Liang C,Huang C F,Mohanty N,et al.A rapid spectrophotometric determination of persulfate anion in ISCO[J].Chemosphere,2008,73(9):1540-1543.
[11]刘晓文,李荣飞,李霞,等.过硫酸钠原位修复三氯乙烯污染土壤的模拟研究[J].环境科学学报,2013,33(11):2935-2940.Liu Xiaowen,Li Rongfei,Li Xia,et al.A model of in situ remediation of TCE-contaminated soil by sodium persulfate[J].Acta Scientiae Circumstantiae,2013,33(11):2935-2940.
[12]Yeh K J,Wu H M,Chen T C.Chemical oxidation of chlorinated non-aqueous phase liquid by hydrogen peroxide in natural sand systems[J].Journal of Hazardous Materials,2003,96(1):29-51.
[13]刘佳露,卢伟,张凤君,等.活化过硫酸盐氧化地下水中苯酚的动力学研究[J].中国环境科学,2015,35(9):2677-2681.Liu Jialu,Lu Wei,Zhang Fengjun,et al.Kinetics study of activated persulfate oxidation of phenol in ground water[J].China Environment Science,2015,35(9):2677-2681.
[14]周睿,赵勇胜,任何军,等.BTEX在地下环境中的自然衰减[J].环境科学,2009,30(9):2804-2808.Zhou Rui,Zhao Yongsheng,Ren Hejun,et al.Natural attenuation of BTEX in the underground environment[J].Environmental Science,2009,30(9):2804-2808.
[15]迟金磊,蒋亚萍,陈余道,等.石灰岩含水介质中苯系物(BTEX)生物可降解性判识[J].高校地质学报,2014(3):476-481.Chi Jinlei,Jiang Yaping,Chen Yudao,et al.Potential biodegradability of BTEX in the aqueous solution containing limestone[J].Geological Journal of China Universities,2014(3):476-481.
[16]蒋亚萍,黄宗万,陈余道,等.石油类污染含水砂柱中BTEX的自然衰减与厌氧生物降解特征[J].桂林理工大学学报,2005,25(2):229-233.Jiang Yaping,Huang Zongwan,Chen Yudao,et al.Natural attenuation and anaerobic biodegradation of BTEX compounds in groundwater contaminated by petroleum hydrocarbons[J].Journal of Guilin University of Technology,2005,25(2):229-233.
[17]Sra K S,Thomson N R,Barker J F.Persulfate injection into a gasoline source zone[J].Journal of Contaminant Hydrology,2013,150(5):35-44.
[18]Chapelle F H.Bioremediation of petroleum hydrocarboncontaminated ground water:the perspectives of history and hydrology[J].Ground Water,2010,37(1):122-132.
[19]Peng YP,Chen KF,Lin WH,et al.A novel three-stage treatment train for the remediation of trichloroethylene-contaminated groundwater[J].Rsc Advances,2016,6(47):41247-41260.
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