Determining the spread of aromatic oil compounds caused by gasoline leakage in the northern parts of the Shazand plain and the role of the cone of depression in developing contamination plume


1 MSc. Graduated in Hydrogeology, University of Tabriz, Iran

2 Professor in Hydrogeology, Faculty Member in Department of Earth Sciences, University of Tabriz, Iran.

3 PhD in Hydrogeology, Geological Laboratory Expert,, Lorestan University, Iran


Nowadays, groundwater pollution, especially the pollutants realized from petroleum refineries and petrochemical complexes, in which the pollution potential of leakage is more possible is one of the main concerns of humanity. In the present research, the northern parts of Shazand plain, Arak province, an area with concentrated industrial units, have been selected as a case study to investigate the oil contaminant caused by the leakage of gasoline at the upstream of well No. 7 in Shazand plain. After stopping the pollution leakage, in order to determine the pollution status, a number of points were selected to drill monitoring wells along the flow direction and two rounds of sampling in August and March 2019 were conducted. The results of analyzed samples revealed that the pollution is gasoline type. Also, the absence of pollution in some of the monitoring wells indicated that the pollution did not spread so much in the monitoring wells MW5, MW6, PB3, and MW4 with concentrations of 7121.5, 3820.7,1046, 257 µg/l and in well No. 7 (260.8 µg/l) as well. In fact, during the period of leakage, the plume progressed downstream of the plain, in about 10 hectares, but the development of a depression cone due to the over-extraction of this well has prevented its further spread of it. Given the aquifer storage coefficient and the depth of groundwater, it has been estimated that about 365000 cubic meters of the aquifer are polluted by the oil contamination.


Main Subjects

Askarzadeh Targhabeh, H., Bazarafshan, A., Hajipourfard, H., 2002. Investigation of Oil pollutants in the underground waters of the Arak Refinery area. Journal of Environmental 29, No 32.  20.1001.1.10258620.1382.
ATSDR, 1997. Methyl Tert-Butyl Ether. U.S. Department OF Health and Human Services, Public Health Service Agency for Toxic Substances and Disease Registry.
Chiu, H.Y., Verpoort, F., Liu, J.k., Chang, Y.M., Kao, C.M., 2017. Using intrinsic bioremediation for petroleum- hydrocarbon contaminated groundwater cleanup and migration containment; effectiveness and mechanism evaluation. Journal of the Taiwan Institute of Chemical Engineers 72, 53-61.
Fels, J., 1999. Source-identification investigations of petroleum contaminated groundwater in the Missouri Ozarks. Journal of Engineering Geology 52, 3–13.
Firmino, P.I.M., Farias, R.S., Barros, A.N., Buarque, P.M., Rodríguez, E., Lopes, A.C., dos Santos, A.B., 2015. Understanding the anaerobic BTEX removal in continuous-flow bioreactors for ex situ bioremediation purposes. Chemical Engineering Journal, 281, 272-280.‏
Gholami, F., Shavandi, M., Mohammad, S., Dastgheib, M., Amoozegar, M.A., 2018. Naphthalene remediation form groundwater by Calcium peroxide (CaO2) nanoparticles in permeable reactive barrier (PRB). Chemosphere 212, 105-113.
Jalali, M., Samani, N., Rezaei, M., 2009. Monitoring oil spills and water and soil pollution in Tehran refinery. The first international conference on water resources management. Shahrood.
Khodaei, K., Nassery, H.R., Asadi, M.M., Mohammadzadeh, H., Mahmoodlu, M.G., 2017. BTEX biodegradation in contaminated groundwater using a novel strain (Pseudomonas sp. BTEX-30). International Biodeterioration & Biodegradation, 116, 234-242.‏
Li, J., de Toledo, R.A., Chung, J., Shim, H., 2014. Removal of mixture of cis-1, 2-dichloroethylene/benzene, toluene, ethylbenzene, and xylenes from contaminated soil by Pseudomonans plecoglossicida. Journal of Chem Tecnol. Biotechnol 89, 1934-1940.
Liang, X., Guo, C., Liao, C., Liu, S., Wick, L.Y., Peng, D., et al., 2017. Drivers and applications of integrated clean-up technologies for surfactant-enhanced remediation of environments contaminated with polycyclic aromatic hydrocarbons (PAHs). Environmental Pollution 225, 129-140.‏ .
Ministry of Energy., 2009. Prohibition extension of Shazand Plain study area, Central Province Regional Water Company, Basic Studies Office, Resources, Group, code 4120.
Mirzaii, A., Rahmani, H., Jadidi, A., 2012. Groundwater pollution and its management. The second environmental planning and management conference, Tehran. University of Tehran.
Mosmeri, H., Gholami, F., Shavandi, M., Dastgheib, S.M.M., Alaie, E., 2019. Bioremediation of benzene-contaminated groundwater by calcium peroxide (CaO2) nanoparticles: continuous-flow and biodiversity studies. Journal of hazardous materials, 371, 183-190.
‏Vaezihir, A., Mohammdzadeh Motlaq, M., Bakhtiari, Sh., Nematollahi, R., 2021. Identification of LNAPL phase of oil contaminations in the aquifer of Bandar Abbas Oil Refinery. Journal of Human and Environment 59, 141-158. 20.1001.1.15625532.1400.
Qobadian, S., Vaezihir, A., Golmohamadi, A., 2020. The study of oil-contamination groundwater due to Shazand Refinery, Journal of Environmental Scientia's Technology, 22, 49-59.
Vaezihir, A., Ahmadzadeh, Z., Hasanpoursedghi, M., Fatehifar, E., 2017. Investigating the possible risk of subsidence and karst formation on the west ethylene pipeline between Meandoab and Tabriz Petrochemical. Journal of Advanced Applied Geology. 6(4), 89-99.
Vaezihir, A., Hajipour, M., 2020. Determination of Characteristics, Extent and Pollution Source in well 7 of Shazand Petrochemical Complex. MSc thesis. University of Tabriz.
Firmino P.I.M., Farias, R.S., Barros, A.N., Buarque P.M.C., Rodríguez, E., Lopes, A.C, dos Santos, A.B., 2015. Understanding the anaerobic BTEX removal in continuous-flow bioreactors for ex situ bioremediation purposes. Chemical Engineering Journal 281, 272–280. 10.1016/j.cej.2015.06.106.