ارزﯾﺎﺑﯽ ﻣﯿﺰان ﺑﻬﺴﺎزي ﺧﺎك ﻫﺎي آﻟﻮده ﻫﯿﺪروﮐﺮﺑﻨﯽ در ﻣﺨﺰن ﺑﺎ اﺳﺘﻔﺎده از روش زﯾﺴﺖ ﺗﺰرﯾﻖ رﺳﻮب ﮐﻠﺴﯿﻢ ﮐﺮﺑﻨﺎت در ﺧﺎك ﻫﺎي ﺷﻞ و ﻣﺘﺮاﮐﻢ ﻣﺎﺳﻪ اي

Improvement Of hydrocarbon contaminated sandy soils with MICP in reservoir

ﭼﮑﯿﺪه آﻻﯾﻨﺪه ﻫﺎي ﻫﯿﺪروﮐﺮﺑﻨﯽ، ﻋﻼوه ﺑﺮ اﯾﻦ ﮐﻪ ﻫﻤﻮاره ﺑﻪ ﻋﻨﻮان ﯾﮑﯽ از ﻣﺨﺎﻃﺮات اﺻﻠﯽ ﻣﺤﯿﻂ زﯾﺴﺖ ﺑﻪ ﺷﻤﺎر ﻣﯽ روﻧﺪ، در ﺧﺎك ﻫﺎي ﻣﺎﺳﻪ اي آﻟﻮده ﺷﺪه، ﭘﺎراﻣﺘﺮﻫﺎي ﻣﻘﺎوﻣﺘﯽ آن را ﮐﺎﻫﺶ داده و ﺑﻪ ﺻﻮرت ﯾﮏ ﺧﻄﺮ زﯾﺴﺖ ﻣﺤﯿﻄﯽ و ﻣﻬﻨﺪﺳﯽ در ﻃﺒﯿﻌﺖ رﻫﺎ ﻣﯽ ﺷﻮﻧﺪ. راﻫﮑﺎر ﻫﺎي زﯾﺎدي ﺑﺮاي ﺑﻬﭙﺎﻻﯾﯽ و ﺑﻬﺴﺎزي اﯾﻨﮕﻮﻧﻪ از ﺧﺎك ﻫﺎ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. در ﭘﮋوﻫﺶ ﺣﺎﺿﺮ، ﺑﻬﺴﺎزي ﺧﺎك ﻫﺎي آﻟﻮده ﺑﻪ دو ﻧﻮع ﻫﯿﺪروﮐﺮﺑﻦ )روﻏﻦ ﻣﻮﺗﻮر و ﮔﺎزوﺋﯿﻞ( ﺑﺎ اﺳﺘﻔﺎده از روش ﺗﺰرﯾﻖ ﻣﻮاد زﯾﺴﺘﯽ ﺑﺮ ﭘﺎﯾﻪ ﺳﻮﯾﻪ ﺑﺎﮐﺘﺮي Sporsarcina pasteuri و ﺳﭙﺲ رﺳﻮب ﮐﺮدن ﮐﻠﺴﯿﻢ ﮐﺮﺑﻨﺎت در ﯾﮏ ﻣﺨﺰن ﺑﺎ اﺗﮑﺎ ﺑﺮ ﻧﻔﻮذ ﺛﻘﻠﯽ ﻣﻮاد ﺑﻬﺴﺎزِ ﻣﯿﮑﺮوﺑﯽ اﻧﺠﺎم ﺷﺪه اﺳﺖ. اﺛﺮات ﺗﺮاﮐﻢ و ﺑﺎزدارﻧﺪﮔﯽ ﻫﯿﺪروﮐﺮﺑﻦ ﻫﺎ در ﻣﻮاﺟﻬﻪ ﺑﺎ ﻣﯿﮑﺮوارﮔﺎﻧﯿﺰم ﻫﺎ )ﺑﺎ اﺳﺘﻔﺎده از ﻧﺘﺎﯾﺞ آزﻣﻮن ﺑﺎزدارﻧﺪﮔﯽ دﯾﺴﮑﯽ( از ﺟﻤﻠﻪ ﻣﻮاردي اﺳﺖ ﮐﻪ ﺑﺮ ﻣﯿﺰان و ﻧﺤﻮه ﺑﻬﺴﺎزي ﻣﺆﺛﺮ ﺑﻮده و ﺑﻬﺴﺎزي ﺑﺎ ﻫﺮ درﺟﻪ اي از ﻣﻮﻓﻘﯿﺖ در ﺧﺎك ﻫﺎي آﻟﻮده ﻫﯿﺪروﮐﺮﺑﻨﯽ ﺻﻮرت ﭘﺬﯾﺮﻓﺘﻪ اﺳﺖ. ﺑﺪﯾﻦ ﺗﺮﺗﯿﺐ ﻧﺘﺎﯾﺞ ﻓﺮآﯾﻨﺪ ﺑﻬﺴﺎزي ﭘﺲ از ﺗﺰرﯾﻖ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘﻨﺪ و ﻣﺸﺨﺼﺎ ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﺑﺎزدارﻧﺪﮔﯽ زﯾﺎد روﻏﻦ ﻣﻮﺗﻮر ﻧﺴﺒﺖ ﺑﻪ ﮔﺎزوﺋﯿﻞ، ﻓﺮآﯾﻨﺪ ﺑﻬﺴﺎزي در اﯾﻦ آﻻﯾﻨﺪه ﮐﻤﺘﺮ از ﮔﺎزوﺋﯿﻞ ﺑﻮد. ﻫﻤﭽﻨﯿﻦ ﺑﯿﺸﺘﺮﯾﻦ ﺑﻬﺴﺎزي زﯾﺴﺘﯽ در ﺧﺎك ﻓﺎﻗﺪ آﻻﯾﻨﺪه رخ داد.

In addition to being a major environmental hazard, hydrocarbon Contamination, in contaminated sandy soils, reduce its resistance parameters and are released as an environmental and engineering hazard to nature. There are many ways to refine and improve such soils. In the present study, improvement of soils contaminated by two types of hydrocarbons (motor oil and gasoline) was performed using the Sporsarcina pasteuri strain bio-based injection method and then calcium carbonate sequestration in a tank based on the gravity penetration of microbial improvers. Effects of Hydrocarbon ,Density and Inhibitory Effects on Exposure to Microorganisms (Using Disk Inhibitory Test Results) are among the factors that influence the rate and mode of recovery and improvement with any degree of success in hydrocarbon contaminated soils. Thus, the results of the improvement process were investigated after injection and, obviously, due to the high inhibitory of the motor oil to the gasoline , the improvement process in this pollutant was less than that of the gasoline. Most bio-improvement also occurred in non-polluted soil.