Laboratory study on dense non-aqueous phase liquid co-boiling during thermal remediation
HUANG Wan1,2, GENG Zhu-ning1,2, LI Guang-he1,2, ZHANG Fang1,2
1. School of Environment, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China; 2. National Engineering Laboratory for Site Remediation Technologies, Beijing 100015, China
Abstract：In this study, single-component and multi-component DNAPL thermal remediation experiments were carried out to establish the relationship between temperature and DNAPL removal. In the single-component DNAPL experiments, an obvious temperature plateau was observed, while the co-boiling region showed a stage of gradually increasing temperature in the multi-component DNAPL experiments. The co-boiling duration was positively correlated with the initial DNAPL saturation in both experiments. The remediation process can be inaccurately interpreted from local-scale temperature measurements, and 0.94% to 1.60% DNAPL saturation remained in the jar after the end of observed co-boiling. Temperature measurement can be affected by DNAPL saturation, DNAPL composition and the location of thermocouples, and it can only reflect the local heating stage. The change of the components in gas and soil samples can help evaluate the remediation process during thermal remediation.
Besha A T, Bekele D N, Naidu R, et al. Recent advances in surfactant-enhanced in-situ chemical oxidation for the remediation of non-aqueous phase liquid contaminated soils and aquifers[J]. Environmental Technology & Innovation, 2018,9:303-322.
[2]
Burghardt J M. Laboratory study evaluating thermal remediation of tetrachloroethylene impacted soil[D]. Ontario:Queen's University Kingston, 2007.
[3]
Tang S, Wang X, Mao Y, et al. Effect of dissolved oxygen concentration on iron efficiency:removal of three chloroacetic acids[J]. Water Research, 2015,73:342-352.
[4]
Heron B G, Bierschenk J, Swift R, et al. Thermal DNAPL source zone treatment impact on a CVOC plume[J]. Ground Water Monitoring & Remediation, 2016,36(1):26-37.
[5]
Saenton S, Illangasekare T H, Soga K, et al. Effects of source zone heterogeneity on surfactant-enhanced NAPL dissolution and resulting remediation end-points[J]. Journal of Contaminant Hydrology, 2002,59(1/2):27-44.
[6]
Borden R C, Richardson S D, Bodour A A. Enhanced reductive dechlorination of trichloroethene in an acidic DNAPL impacted aquifer[J]. Journal of Environmental Management, 2019,237:617-628.
[7]
Haluska A A, Schaefer C E, Cho J, et al. Long-term mass flux assessment of a DNAPL source area treated using bioremediation[J]. Journal of Contaminant Hydrology, 2019,227:1-12.
[8]
Maire J, Fatin-Rouge N. Surfactant foam flushing for in situ removal of DNAPLs in shallow soils[J]. Journal of Hazardous Materials, 2016, 321:247-255.
[9]
Maire J, Joubert A, Kaifas D, et al. Assessment of flushing methods for the removal of heavy chlorinated compounds DNAPL in an alluvial aquifer[J]. Science of the Total Environment, 2018,612:1149-1158.
[10]
程洲,徐红霞,吴吉春,等.地下水中Tween80对DNAPL运移和分布的影响[J]. 中国环境科学, 2019,39(3):174-183. Cheng Z, Xu H X, Wu J C, et al. Effects of Tween 80in groundwater on DNAPL migration and distribution[J]. China Environmental Science, 2019,39(3):174-183.
[11]
郑菲,高燕维,孙媛媛,等.污染源区结构特征对Tween80去除DNAPL效果的影响[J]. 中国环境科学, 2016,36(7):2035-2042. Zheng F, Gao Y W, Sun Y Y, et al. The influence of source-zone architecture on DNAPL removal by Tween 80flushing[J]. China Environmental Science, 2016,36(7):2035-2042.
[12]
Oleszkiewicz J A, Elektorowicz M. Groundwater contamination with trichloroethylene:The problem and some solutions-A review[J]. Soil and Sediment Contamination, 1993,2(3):205-228.
[13]
Mcguire T M, Mcdade J M, Newell C J. Performance of DNAPL source depletion technologies at 59chlorinated solvent-impacted sites[J]. Ground Water Monitoring & Remediation, 2006,26(1):73-84.
[14]
Zhao C, Mumford K G, Kueper B H. Laboratory study of non-aqueous phase liquid and water co-boiling during thermal treatment[J]. Journal of Contaminant Hydrology, 2014,164:49-58.
[15]
Aresta M, Dibenedetto A, Fragale C, et al. Thermal desorption of polychlorobiphenyls from contaminated soils and their hydrodechlorination using Pd-and Rh-supported catalysts[J]. Chemosphere, 2008,70(6):1052-1058.
[16]
张学良,廖朋辉,李群,等.复杂有机物污染地块原位热脱附修复技术的研究[J]. 土壤通报, 2018,49(4):243-250. Zhang X L, Liao P H, Li Q, et al. Remediation of complex organic compounds in contaminated plot with in-situ thermal desorption[J]. Chinese Journal of Soil Science, 2018,49(4):243-250.
[17]
杨勇,何艳明,栾景丽,等.国际污染场地土壤修复技术综合分析[J]. 环境科学与技术, 2012,35(10):92-98. Yang Y, He Y M, Luan J L, et al. Comprehensive analysis on soil remediation technologies of international contaminated sites[J]. Environmental Science & Technology, 2012,35(10):92-98.
[18]
康绍果,李书鹏,范云.污染地块原位加热处理技术研究现状与发展趋势[J]. 化工进展, 2017,36(7):2621-2631. Kang S G, Li S P, Fan Y. Research status and development trend of in situ thermal treatment technologies for contaminated site[J]. Chemical Industry and Engineering Progress, 2017,36(7):2621-2631.
[19]
李大伟,张耀斌,全燮,等.原油污染土壤的颗粒活性炭增强微波热修复研究[J]. 环境科学, 2009,30(2):247-252. Li D W, Zhang Y B, Quan X, et al. Microwave thermal remediation of soil contaminated with crude oil enhanced by granular activated carbon. Environmental Science, 2009,30(2):247-252.
[20]
张攀,高彦征,孔火良.污染土壤中硝基苯热脱附研究[J]. 土壤, 2012,44(5):99-104. Zhang P, Gao Y Z, Kong H L. Thermal desorption of nitrobenzene in contaminated soil[J]. Soils, 2012,44(5):99-104.
[21]
缪周伟,吕树光,邱兆富,等.原位热处理技术修复重质非水相液体污染场地研究进展[J]. 环境污染与防治, 2012,34(8):78-83. Liao Z W, Lv S G, Qiu Z F, et al. Progress of in situ thermal treatment technologies for DNAPLs contaminated site remediation[J]. Environmental Pollution & Control, 2012,34(8):78-83.
[22]
焦文涛,韩自玉,吕正勇,等.土壤电阻加热技术原位修复有机污染土壤的关键问题与展望[J]. 环境工程学报, 2019,13(9):2027-2036. Jiao W T, Han Z Y, Lv Z Y, et al. Key issue and expectation of soil electrical resistance heating remediation technology[J]. Chinese Journal of Environmental Engineering, 2019,13(9):2027-2036.
[23]
李鹏,廖晓勇,阎秀兰,等.热强化气相抽提对不同质地土壤中苯去除的影响[J]. 环境科学, 2014,35(10):3888-3895. Li P, Liao X Y, Yan X L, et al. Effect of thermal enhanced soil vapor extraction on benzene removal in different soil textures[J]. Environmental Science, 2014,35(10):3888-3895.
[24]
陈星,宋昕,吕正勇,等.PAHs污染土壤的热修复可行性[J]. 环境工程学报, 2018,12(10):2833-2844. Chen X, Song X, Lv Z Y, et al. Feasibility of thermal remediation of soil contaminated with PAHs[J]. Chinese Journal of Environmental Engineering, 2018,12(10):2833-2844.
[25]
迟克宇,李传维,籍龙杰,等.原位电热脱附技术在某有机污染场地修复中的应用效果[J]. 环境工程学报, 2019,13(9):2049-2059. Chi K Y, Li C W, Ji L J, et al. Application effect of in-situ electric thermal desorption technology used in remediation at an organics-contaminated site[J]. Chinese Journal of Environmental Engineering, 2019,13(9):2049-2059.
[26]
李书鹏,焦文涛,李鸿炫,等.燃气热脱附技术修复有机污染场地研究与应用进展[J]. 环境工程学报, 2019,13(9):2037-2048. Li S P, Jiao W T, Li H X, et al. Research and application progress of gas thermal desorption technology for the remediation of organic contaminated sites[J]. Chinese Journal of Environmental Engineering, 2019,13(9):2037-2048.
[27]
周文敏,傅德黔,孙宗光.水中优先控制污染物黑名单[J]. 中国环境监测, 1990,6(4):3-5. Zhou W M, Fu D Q, Sun Z G. Black List of China's Priority Pollutants in Water. Environmental Monitoring in China[J]. 1990,6(4):3-5.
[28]
Cheng Z, Li C, Kennes C, et al. Improved biodegradation potential of chlorobenzene by a mixed fungal-bacterial consortium[J]. International Biodeterioration & Biodegradation, 2017,123:276-285.
[29]
Hicknell B N, Mumford K G, Kueper B H. Laboratory study of creosote removal from sand at elevated temperatures[J]. Journal of Contaminant Hydrology, 2018,219:40-49.
[30]
王慧婷,徐红霞,郭琼泽,等.饱和多孔介质中DNAPL污染源区结构及质量溶出[J]. 中国环境科学, 2019,39(8):3474-3483. Wang H T, Xu H X, Guo Q Z, et al. Dense non-aqueous phase liquid source zone architecture and dissolution in saturated porous media. China Environmental Science, 2019,39(8):3474-3483.
[31]
GB/T 14848-2017地下水质量标准[S]. GB/T 14848-2017 Standard for groundwater quality[S].
[32]
GB36600-2018土壤环境质量建设用地土壤污染风险管控标准(试行)[S]. GB36600-2018 Solid environmental quality risk control standard for soil contamination of development land[S].
