Remediation of heavy petroleum-contaminated soil by calcium hydroxide-enhanced thermal desorption
DAI Mengjia1,2,, LIU Yuqin2, ZHANG Qian2, WU Bin2, XU Duanping1, MA Fujun2,,, GU Qingbao2 1.College of Environmental Science and Engineering, Liaoning Technical University, Fuxin 123000, China 2.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Abstract:Aiming at the disadvantage of high energy consumption of thermal desorption techniques in remediating heavy petroleum-contaminated soil, Ca(OH)2 was used in this study to strengthen the remediation of heavy petroleum-contaminated soil at comparatively low thermal desorption temperature and decrease the energy consumption. The effects of thermal desorption temperature, retention time, and the addition amount of Ca(OH)2 on the removal efficiency of total petroleum hydrocarbon (TPH) in heavy petroleum-contaminated soil were investigated through laboratory simulation experiments, and the variances of soil physicochemical properties caused by thermal desorption treatment was also studied. Results showed that, comparing with the soil treated without Ca(OH)2, the removal efficiency of TPH in the soil treated with 1% Ca(OH)2 increased by 23.6% at 400 °C for 30 min. Meanwhile, the removal efficiencies of saturates, aromatics, resins, and asphaltenes increased by 17.3%, 29.3%, 18.1% and 46.7%, respectively. And the removal efficiency of asphaltenes was the highest. Ca(OH)2 could decrease the thermal activation energy and increase active sites, which significantly promoted the removal of heavy hydrocarbons in heavy petroleum-contaminated soil by thermal desorption. After thermal treated with 1% Ca(OH)2, soil viscosity decreased, then the dispersion of soil particles increased and the particle size decreased. Additionally, a thin film of char-like material coated on the surface particles. This study could provide theoretical reference for the application of thermal desorption technology to remediate the petroleum contaminated soil in China. Key words:calcium hydroxide/ heavy hydrocarbons/ contaminated soil/ thermal desorption.
图1石油污染土壤强化热脱附修复实验系统 Figure1.Schematic diagram of thermal desorption of petroleum contaminated soil
ROSELL-MELé A, MORALEDA-CIBRIáN N, CARTRó-SABATé M, et al. Oil pollution in soils and sediments from the Northern Peruvian Amazon[J]. Science of the Total Environment, 2018, 610-611: 1010-1019. doi: 10.1016/j.scitotenv.2017.07.208
[2]
OBIDA C B, ALAN BLACKBURN G, DUNCAN WHUATT J, et al. Quantifying the exposure of humans and the environment to oil pollution in the Niger Delta using advanced geostatistical techniques[J]. Environment International, 2018, 111: 32-42. doi: 10.1016/j.envint.2017.11.009
[3]
DOS SANTOS J J, MARANHO L T. Rhizospheric microorganisms as a solution for the recovery of soils contaminated by petroleum: A review[J]. Journal of Environmental Management, 2018, 210: 104-113.
FALCIGLIA P P, GIUSTRA M G, VAGLIASINDI F G. Low temperature thermal desorption of diesel polluted soil: Influence of temperature and soil texture on contaminant removal kinetics[J]. Journal of Hazardous Materials, 2011, 185(1): 392-400. doi: 10.1016/j.jhazmat.2010.09.046
[7]
VIDONISH J, ZYGOURAKIS K, MASIELLO C, et al. Pyrolytic treatment and fertility enhancement of soils contaminated with heavy hydrocarbons[J]. Environmental Science & Technology, 2016, 50(5): 2498-2506.
[8]
LI D C, XU W F, MU Y, et al. Remediation of petroleum-contaminated soil and simultaneous recovery of oil by fast pyrolysis[J]. Environmental Science & Technology, 2018, 52(9): 5330-5338.
TRINDADE P V O, SOBRAL L G, RIZZO A C L, et al. Bioremediation of a weathered and a recently oil-contaminated soils from Brazil: A comparison study[J]. Chemosphere, 2005, 58(4): 515-522. doi: 10.1016/j.chemosphere.2004.09.021
[11]
KHAN M A I, BISWAS B, SMITH E, et al. Toxicity assessment of fresh and weathered petroleum hydrocarbons in contaminated soil: A review[J]. Chemosphere, 2018, 212: 755-767. doi: 10.1016/j.chemosphere.2018.08.094
[12]
TANG J C, LU X Q, SUN Q, et al. Aging effect of petroleum hydrocarbons in soil under different attenuation conditions[J]. Agriculture Ecosystem & Environment, 2012, 149(1): 109-117.
[13]
LEMKAU K L, MCKENNA A M, PODGORSKI D C, et al. Molecular evidence of heavy-oil weathering following the M/V Cosco Busan spill: Insights from fourier transform ion cyclotron resonance mass spectrometry[J]. Environmental Science & Technology, 2014, 48(7): 3760-3767.
[14]
FRANKLIN H D, PETERS W A, HOWARD J B. Mineral matter effects on the rapid pyrolysis and hydropyrolysis of a bituminous coal: 2. Effects of yields of C3-C8 hydrocarbons[J]. Fuel, 1982, 61(12): 1231-1217.
ZHOU J H, HUANG R H, TIAN S N, et al. Microtitration assay of total petroleum hydrocarbons in contaminated soils using ultrasonic extraction and multiskan spectrum[J]. Spectroscopy and Spectral Analysis, 2017, 37(11): 3647-3652.
KOK M V, GUL K G. Thermal characteristics and kinetics of crude oils and SARA fractions[J]. Thermochimica Acta, 2013, 569: 66-70. doi: 10.1016/j.tca.2013.07.014
[20]
MICHELSEN T C, BOYCE C P. Cleanup standards for petroleum hydrocarbons. Part 1. Review of methods and recent developments[J]. Soil & Sediment Contamination, 1993, 2(2): 109-124.
SOLOMON P R, HAMBLEN D G, CARANGELO R M, et al. General model of coal devolatilization[J]. Energy & Fuels, 1988, 2(4): 405-422.
[24]
LIU Y Q, ZHANG Q, WU B, et al. Hematite-facilitated pyrolysis: An innovative method for remediating soils contaminated with heavy hydrocarbons[J]. Journal of Hazardous Materials, 2020, 383: 121165. doi: 10.1016/j.jhazmat.2019.121165
1.College of Environmental Science and Engineering, Liaoning Technical University, Fuxin 123000, China 2.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China Received Date: 2020-04-17 Accepted Date: 2020-05-21 Available Online: 2020-12-08 Keywords:calcium hydroxide/ heavy hydrocarbons/ contaminated soil/ thermal desorption Abstract:Aiming at the disadvantage of high energy consumption of thermal desorption techniques in remediating heavy petroleum-contaminated soil, Ca(OH)2 was used in this study to strengthen the remediation of heavy petroleum-contaminated soil at comparatively low thermal desorption temperature and decrease the energy consumption. The effects of thermal desorption temperature, retention time, and the addition amount of Ca(OH)2 on the removal efficiency of total petroleum hydrocarbon (TPH) in heavy petroleum-contaminated soil were investigated through laboratory simulation experiments, and the variances of soil physicochemical properties caused by thermal desorption treatment was also studied. Results showed that, comparing with the soil treated without Ca(OH)2, the removal efficiency of TPH in the soil treated with 1% Ca(OH)2 increased by 23.6% at 400 °C for 30 min. Meanwhile, the removal efficiencies of saturates, aromatics, resins, and asphaltenes increased by 17.3%, 29.3%, 18.1% and 46.7%, respectively. And the removal efficiency of asphaltenes was the highest. Ca(OH)2 could decrease the thermal activation energy and increase active sites, which significantly promoted the removal of heavy hydrocarbons in heavy petroleum-contaminated soil by thermal desorption. After thermal treated with 1% Ca(OH)2, soil viscosity decreased, then the dispersion of soil particles increased and the particle size decreased. Additionally, a thin film of char-like material coated on the surface particles. This study could provide theoretical reference for the application of thermal desorption technology to remediate the petroleum contaminated soil in China.
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