تاثیر دو ماده افزودنی منیزیم اکسید و آهک بر روی بهسازی یک خاک رسی آلوده به متیل‌ترت‌بوتیل‌اتر

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران، تهران، ایران.

2 استاد، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران، تهران، ایران.

3 دانشجوی دکتری، دانشکده مهندسی و فناوری کشاورزی، دانشگاه تهران، تهران، ایران.

چکیده

در این پژوهش، خواص فیزیکی و مکانیکی یک خاک رسی آلوده به ماده آلی متیل‌ترت‌بوتیل-اتر (MTBE) و امکان بهسازی آن با استفاده از دو ماده افزودنی منیزیم‌اکسید و آهک هیدراته مورد بررسی قرار گرفت. خاک رسی به‌صورت مصنوعی با MTBE آلوده گردید و مواد افزودنی منیزیم‌اکسید و آهک هیدراته در درصدهای وزنی مختلف به خاک طبیعی و خاک آلوده اضافه شد. سپس آزمایش‌های فیزیکی و مکانیکی خاک شامل حدود اتربرگ، تراکم، مقاومت فشاری تک‌محوری و میکروسکوپ الکترونی روبشی (SEM) روی نمونه‌های مختلف خاک صورت گرفت. نمونه‌های مقاومتی به‌روش تراکم استاتیکی تهیه شدند و مقاومت آنها در زمان‌های عمل‌آوری 14،7 و 28 روز تعیین شد. نتایج نشان‌ داد که افزودن MTBE به خاک منجر به کاهش حدود اتربرگ، پارامترهای تراکمی و مقاومت فشاری خاک در مقایسه با خاک طبیعی می‌شود. همچنین نتایج نشان داد که منیزیم‌اکسید و آهک هر دو سبب افزایش میزان مقاومت و مدول الاستیسیته مربوط به 50% از مقاومت نهایی (E50) و در نتیجه بهسازی خاک طبیعی و آلوده به MTBE می‌گردند که این افزایش تابعی از درصد مواد افزودنی مورد استفاده و زمان عمل‌آوری می‌باشد. علاوه بر این مقایسه نتایج نمونه‌های بهسازی شده با یکدیگر نشان داد که مقاومت ایجاد شده در خاک طبیعی از خاک آلوده بیشتر می‌باشد و آهک تأثیر کمتری بر روی بهسازی خاک در مقایسه با منیزیم‌اکسید دارد. همچنین نتایج SEM نشان داد که افزایش مقاومت نمونه‌های بهسازی شده، در اثر تشکیل مواد سیمانی‌کننده‌ طی عمل کربناسیون می‌باشد که این امر سبب چسباندن ذرات به یکدیگر و تولید یک جسم صلب می‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Magnesium Oxide and Lime on the Improvement a Clay Soil Contaminated with MTBE

نویسندگان [English]

  • Armin Ansar Shourijeh 1
  • Ali Raeesi Estabragh 2
  • Mohadeseh Amini 3
1 Faculty of Agricultural Engineering and Technology, University of Tehran, Tehran, Iran.
2 Faculty of Agricultural Engineering and Technology, University of Tehran, Tehran, Iran.
3 Faculty of Agricultural Engineering and Technology, University of Tehran, Tehran, Iran.
چکیده [English]

In this study, the improvement of a clay soil contaminated with MTBE (methyl tert-butyl ether) using magnesium oxide and hydrated lime was studied. Soil contaminated with MTBE was prepared in the laboratory, then mixed with different percentages of magnesium oxide and hydrated lime. Natural soil was also mixed with the same percentages used with the desired additives. Atterberg limits, compaction, Unconfined compressive strength, and SEM tests were performed on all samples. To determine the strength, the samples were prepared by static method and tested after 7, 14, and 28 days of curing time. The results showed that magnesium oxide and lime both increase the strength and E50 and thus improve natural and contaminated soil, which is a function of the percentage of used additives and curing time. The Comparison of improvement results showed that the final strength in natural soil is higher than in contaminated soil. In addition, the comparison of the results showed that lime has less effect on soil improvement compared to magnesium oxide. The SEM results also showed that the increase in strength is due to the cement materials produced during the carbonation process, which makes the particles paste to each other and make a rigid body.

کلیدواژه‌ها [English]

  • Contaminated Clay
  • Improvement
  • MTBE
  • MgO
  • Lime

مراجع

[1] Atienza, J., Aragon, P., Herrero, M. A., Puchades, R., & Maquieira, A. (2005). State of the art in determination of MTBE in natural waters and soils, Critical reviews in analytical chemistry, 35(4), 317-337. doi: 10.1080/10408340500431280 
[2] Karkush, M. O., & Kareem, Z. A. (2021). Investigation the impacts of fuel oil contamination on the behaviour of passive piles group in clayey soils, European Journal of Civil and Environmental Engineering, 25(3), 485-501. doi: 10.1080/19648189.2018.1531790
[3] Ahmadi, M., Ebadi, T., & Maknoon, R. (2021). Effects of crude oil contamination on geotechnical properties of sand-kaolinite mixtures, Engineering Geology, 283, 1-13. doi: 10.1016/j.enggeo.2021.106021
[4] Deeb, R. A., Chu, K. H., Shih, T., Linder, S., Suffet, I., Kavanaugh, M. C., & Alvarez-Cohen, L. (2004). MTBE and Other Oxygenates: Environmental Sources, Analysis, Occurrence, and Treatment, Environmental Engineering Science, 20(5), 433-447. doi: 10.1089/109287503768335922
[5] Belpoggi, F., Soffritti, M., & Maltoni, C. (1995). Methyl-tertiary-butyl ether (MTBE)-a gasoline additive-causes testicular and lymphohaematopoietic cancers in rats, Toxicology and Industrial Health, 11(2), 119-149. doi: 10.1177/074823379501100202 
[6] Liang, C., Guo, Y. Y., Chien, Y. C., & Wu, Y. J. (2010). Oxidative degradation of MTBE by pyrite-activated persulfate: Proposed reaction pathways, Industrial and Engineering Chemistry Research, 49(18), 8858-8864. doi: 10.1021/ie100740d
[7] Mirzaei, K., Ghanizadeh, A. R., & Bakhtiari, S. (2021). Strength Characteristics of High Plasticity Clay Sub-grade Soil Stabilized with Ground Granulated Blast Furnas Slag, Fly-Ash and Diatomite, Journal of Civil Infrastructure Researches, 6(2), 67-78. doi: 10.22091/CER.2021.6858.1241 [In Persian]
[8] Phanikumar, B. R., Shankar, M. U., & Manikanta, D. (2022). Interaction of diesel oil contaminants with laterite soil and bentonite treated by sawdust -landfill liner, Geomechanics and Geoengineering: An International Journal, 1-17. doi: 10.1080/17486025.2022.2067595 
[9] Ingles, O. H. (1987). Soil stabilization, Ground Engineer's Reference Book, Butterworth-Heinemann, London, Chapter 38, 1-26.
[10] Sherwood, P. T. (1993). Soil Stabilization with Cement and Lime, Her Majesty's Stationery Office, London.
[11] Bell, F. G. (1996). Lime stabilization of clay minerals and soils, Engineering Geology, 42(4), 223-237. doi: 10.1016/0013-7952(96)00028-2
[12] Bell, F. G., & Coulthard, J. M. (1990). Stabilization of clay coils with lime, Municipal Engineer, 7(3), 125-140.
[13] Unluer, C., & Al-Tabbaa, A. (2011). Green Construction with Carbonating Reactive Magnesia Blocks: Effect of Cement and Water Contents, International Conference on Future Concrete, Dubai, UAE.
[14] Shand, M. A. (2006). The Chemistry and Technology of Magnesia, 1st edition, John Wiley & Sons, Hoboken, New Jersey.
[15] Al-Tabbaa, A. (2013). Reactive magnesia cement, Eco-efficient concrete, 1st edition, Woodhead Publishing, Sawston, Cambridge, 523-543.
[16] Jin, F., Gu, K., & Al-Tabbaa, A. (2015). Strength and hydration properties of reactive MgO-activated ground granulated blastfurnace slag paste, Cement and Concrete Composites, 57, 8-16. doi: 10.1016/j.cemconcomp.2014.10.007
[17] Iyengar, S., & Al-Tabbaa, A. (2008). Application of Two Novel Magnesia-Based Cements in the Stabilization/Solidification of Contaminated Soils, American Society of Civil Engineers GeoCongress, New Orleans, Louisiana, United States, 716-723. doi: 10.1061/40970(309)90
[18] Amini, M., Estabragh, A. R., & Abdollahi, J. (2021). Improvement the Behaviors of a Clay Soil Contaminated with Phenanthrene by Using MgO, Ferdowsi Civil Engineering, 34(3), 53-66. doi: 10.22067/jfcei.2022.71848.1055 [In Persian]
[19] Goodarzi, A. R., & Movahedrad, M. (2017). Stabilization/solidification of zinc-contaminated kaolin clay using ground granulated blast-furnace slag and different types of activators, Applied Geochemistry, 81, 155-165. doi: 10.1016/j.apgeochem.2017.04.014
[20] Estabragh, A. R., Kholoosi, M. M., Ghaziani, F., & Javadi, A. A. (2017). Stabilization and Solidification of a Clay Soil Contaminated with MTBE, Journal of Environmental Engineering, 143(9), 04017054. doi: 10.1061/(ASCE)EE.1943-7870.0001248
[21] Sobhani Nezhad, R., Nasehi, S. A., Uromeihy, A., & Nikudel, M. R. (2020). Utilization of Nanosilica and Hydrated Lime to Improve the Unconfined Compressive Strength (UCS) of Gas Oil Contaminated Clay, Geotechnical and Geological Engineering, 39(3), 2633-2651. doi: 10.1007/s10706-020-01642-6
[22] Hamidi, A., & Hajimohammadi, M. (2021). Improving the mechanical behaviour of clay contaminated with glycerol and anthracene using lime and Portland cement, Geomechanics and Geoengineering, 1-15. doi: 10.1080/17486025.2021.1992515
[23] Hamidi, A., & Abdoos, S. (2020). Application of Lime and Portland Cement for Improvement of Clay Contaminated with Anthracene and Glycerol, Journal of Civil Infrastructure Researches, 5(2), 111-122. doi: 10.22091/CER.2020.5374.1198 [In Persian]
[24] Estabragh, A. R., Bordbar, A. T., Ghaziani, F., & Javadi, A. A. (2016). Removal of MTBE from a clayey soil using electrokinetic technique, Environmental Technology, 37(14), 1745-1756. doi: 10.1080/09593330.2015.1131750
[25] Tabebordbar, A., Ghaziani, F., Estabragh, A. R., & Liaghat, A. (2014). Adsorption Capacity, Separation Method and Determination of the Concentration of MTBE in Contaminated Kaolinite Clay Soil, Iranian Journal of Soil and Water Research, 44(4), 347-355. doi: 10.22059/ijswr.2013.50407 [In Persian]
[26] Estabragh, A. R., Beytolahpour, I., Javadi, A. A. )2011). Effect of Resin on the Strength of Soil-CementMixture, Journal of Materials in Civil Engineering, 23(7), 969-976. doi: 10.1061/(ASCE)MT.1943-5533.0000252
[27] Estabragh, A. R., Khatibi, M., Javadi, A. A. (2016). Effect of Cement on Treatment of a Clay Soil Contaminated with Glycerol, Journal of Materials in Civil Engineering, 28(4), 04015157. doi: 10.1061/(ASCE)MT.1943-5533.0001443
[28] Mitchell, J. K., & Soga, K. (2005). Fundamentals of soil behavior, 3rd edition, John Wiley & Sons, Hoboken, New Jersey.
[29] Estabragh, A. R., Khajepour, H., Javadi, A. A., & Amini, M. (2022). Effect of forced carbonation on the behaviour of a magnesia-stabilised clay soil, International Journal of Pavement Engineering, 23(5), 1691-1705. doi: 10.1080/10298436.2020.1821023
[30] Liska, M., & Vandeperre, L. J. (2008). Influence of carbonation on the properties of reactive magnesia cement-based pressed masonry units, Advances in Cement Research, 20(2), 53-64. doi: 10.1680/adcr.2008.20.2.53
[31] Vandeperre, L. J., Liska, M., & Al-Tabbaa, A. (2008). Microstructures of reactive magnesia cement blends, Cement and Concrete Composites, 30(8), 706-714. doi: 10.1016/j.cemconcomp.2008.05.002
[32] Ratnaweera, P., & Meegoda, J. (2006). Shear Strength and Stress-Strain behavior of Contaminated Soils, Geotechnical Testing Journal, 29(2), 133-140. doi: 10.1520/GTJ12686
[33] Unluer, C., & Al-Tabbaa, A. (2012). Effect of Aggregate Size Distribution on the Carbonation of Reactive Magnesia Based Porous Blocks, 18th Annual International Sustainable Development Research Conference, Hull, UK.
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