پديد آورندگان :
ﮐﻮﺛﺮي، ﻣﺤﻤﺪﺣﺴﻦ داﻧﺸﮕﺎه ﻋﻠﻮم ﭘﺰﺷﮑﯽ ﺳﺒﺰوار - داﻧﺸﮑﺪه ﺑﻬﺪاﺷﺖ - ﮔﺮوه ﻣﻬﻨﺪﺳﯽ ﺑﻬﺪاﺷﺖ ﻣﺤﯿﻂ، ﺳﺒﺰوار، اﯾﺮان , ﺳﺎﻗﯽ، ﻣﺤﻤﺪﺣﺴﯿﻦ داﻧﺸﮕﺎه ﻋﻠﻮم ﭘﺰﺷﮑﯽ ﺳﺒﺰوار - داﻧﺸﮑﺪه ﺑﻬﺪاﺷﺖ - ﮔﺮوه ﻣﻬﻨﺪﺳﯽ ﺑﻬﺪاﺷﺖ ﻣﺤﯿﻂ، ﺳﺒﺰوار، اﯾﺮان , رﺳﺘﮕﺎر، اﯾﻮب داﻧﺸﮕﺎه ﻋﻠﻮم ﭘﺰﺷﮑﯽ ﺳﺒﺰوار - داﻧﺸﮑﺪه ﺑﻬﺪاﺷﺖ - ﮔﺮوه ﻣﻬﻨﺪﺳﯽ ﺑﻬﺪاﺷﺖ ﻣﺤﯿﻂ، ﺳﺒﺰوار، اﯾﺮان , ﺳﺘﻮده، ﺳﻤﯿﻪ داﻧﺸﮕﺎه آزاد اﺳﻼﻣﯽ - داﻧﺸﮑﺪه ﭘﺮﺳﺘﺎري - ﮔﺮوه ﭘﺮﺳﺘﺎري، ﺳﺒﺰوار، اﯾﺮان
كليدواژه :
آﻟﻮدﮔﯽ ﺧﺎك , ﻓﻠﺰات سنگين , ﻣﺤﻞ دﻓﻦ , محل دفن زباله‌هاي شهري
چكيده فارسي :
زﻣﯿﻨﻪ و ﻫﺪف: در ﻣﺤﻞﻫﺎي دﻓﻦ ﻣﻬﻨﺪﺳﯽﺷﺪه ﻧﯿﺰ ﻧﻤﯽﺗﻮان از ﺗﻮﻟﯿﺪ ﺷﯿﺮاﺑﻪ ﺟﻠﻮﮔﯿﺮي ﮐﺮد ﮐﻪ ﺣﺎوي اﻧﻮاع ﻣﺨﺘﻠﻔﯽ از ﻓﻠﺰات ﺳﻨﮕﯿﻦ اﺳﺖ؛ ﺑﻨﺎﺑﺮاﯾﻦ ﻣﺤﻞ دﻓﻦ زﺑﺎﻟﻪ ، ﯾﮑﯽ از ﻣﻨﺎﺑﻊ اﺻﻠﯽ اﻓﺰاﯾﺶ ﻏﻠﻈﺖ ﻓﻠﺰات ﺳﻨﮕﯿﻦ در ﺧﺎك اﺳﺖ. ﻫﺪف از اﻧﺠﺎم اﯾﻦ ﻣﻄﺎﻟﻌﻪ، ﺑﺮرﺳﯽ ﺷﺪت آﻟﻮدﮔﯽ ﺧﺎكﻫﺎي اﻃﺮاف ﻣﺤﻞ دﻓﻦ زﺑﺎﻟﻪ ﺳﺒﺰوار ﺑﻪ ﻓﻠﺰات ﺳﻨﮕﯿﻦ و ﺗﻬﯿﻪ ﻧﻘﺸﻪ آﻟﻮدﮔﯽ ﺧﺎك ﺑﻪ ﻓﻠﺰات ﺳﻨﮕﯿﻦ ﺑﻮد . ﻣﻮاد و روش ﻫﺎ: ﻧﻤﻮﻧﻪﻫﺎي ﺧﺎك ﻫﺎي ﺳﻄﺤﯽ و ﻋﻤﻘﯽ در 18 اﯾﺴﺘﮕﺎه ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﻧﻮع ﺧﺎك و ﻓﺎﺻﻠﻪ از ﻣﺤﻞ دﻓﻦ ﺷﻬﺮ ﺳﺒﺰوار ﺟﻤﻊ آوري ﺷﺪ. ﻏﻠﻈﺖ ﻓﻠﺰات ﺳﻨﮕﯿﻦ آرﺳﻨﯿﮏ، روي، ﺳﺮب، ﮐﺮوم، ﻣﺲ، ﺟﯿﻮه و ﮐﺎدﻣﯿﻮم ﺑﻪ وﺳﯿﻠﻪ دﺳﺘﮕﺎه ICP-OES آﻧﺎﻟﯿﺰ ﮔﺮدﯾﺪ. ﺷﺪت آﻟﻮدﮔﯽ ﺧﺎك ﺑﺎ اﺳﺘﻔﺎده از ﺷﺎﺧﺺﻫﺎي زﻣﯿﻦ اﻧﺒﺎﺷﺘﮕﯽ )Igeo( و ﻣﺠﻤﻮع رﯾﺴﮏ اﮐﻮﻟﻮژﯾﮑﯽ )RI( ارزﯾﺎﺑﯽ ﺷﺪ. ﯾﺎﻓﺘﻪﻫﺎ: ﻣﯿﺎﻧﮕﯿﻦ ﻏﻠﻈﺖ آرﺳﻨﯿﮏ، روي، ﺳﺮب، ﮐﺮوم و ﻣﺲ در ﺧﺎك ﺳﻄﺤﯽ ﺑﻪﺗﺮﺗﯿﺐ 6.013, 41.04, 6.31, 26.77 , 31.45 mg/kg و ﺟﯿﻮه و ﮐﺎدﻣﯿﻮم ﺑﻪ ﺗﺮﺗﯿﺐ 60.79 , 61.60 μg/kg ﺑﻮد. اﻣﺎ ﻣﯿﺎﻧﮕﯿﻦ ﻏﻠﻈﺖ آرﺳﻨﯿﮏ، روي، ﺳﺮب، ﮐﺮوم و ﻣﺲ در ﺧﺎك در ﻋﻤﻘﯽ ﺑﻪ ﺗﺮﺗﯿﺐ 5.75, 38.33, 6.25, 22.68 , 31.04 mg/kg, و ﺟﯿﻮه و ﮐﺎدﻣﯿﻮم ﺑﻪ ﺗﺮﺗﯿﺐ 66.57 , 59.98 μg/kg, ﺑﻮد ﮐﻪ ﻣﻘﺪار ﻫﻤﮕﯽ ﻧﺴﺒﺖ ﺑﻪ ﻣﻘﺎدﯾﺮ ﭘﺲ زﻣﯿﻨﻪ ﻃﺒﯿﻌﯽ ﺑﯿﺸﺘﺮ اﺳﺖ.
ﻧﺘﯿﺠﻪﮔﯿﺮي: ﺑﺮاﺳﺎس ﺑﺮآورد ﺷﺎﺧﺺ ﻫﺎ ي Igeo و RI ﺑﺮاي ﻓﻠﺰات ﺳﻨﮕﯿﻦ آرﺳﻨﯿﮏ، ﺳﺮب، روي، ﮐﺮوم و ﻣﺲ در ﺧﺎك ﻧﺒﻮد آﻟﻮدﮔﯽ وﻟﯽ ﺑﺮاي ﺟﯿﻮه و ﮐﺎدﻣﯿﻮم آﻟﻮدﮔﯽ ﺷﺪﯾﺪ را ﻧﺸﺎن داد.
چكيده لاتين :
Even in engineered landfills in developed countries, leachate production cannot be avoided and it contains different types of heavy metals. Therefore, landfills are one of the main sources of increased concentrations of heavy metals in the soil. The purpose of this study was to evaluate the severity of
contamination of soils around Sabzevar landfill with heavy metals and to prepare a
soil contamination map with heavy metals.
Methods: Samples of surface and deep soils were collected in 18 stations according
to the type of soil and distance from landfill Sabzevar. The concentrations of heavy
metals Arsenic, Zinc, Lead, Chromium, Copper, Mercury and Cadmium were
analyzed by ICP-OES. The intensity of soil contamination was assessed using Index
Geoaccumulation Potential ecological risk index.
Results: The mean concentrations of Arsenic, Zinc, Lead, Chromium and Copper in surface soil, respectively are, 6.013, 41.04, 6.31, 26.77 and 31.45 mg/kg of Mercury and Cadmium, respectively, 60.79 and 61.60 μg/kg, respectively. But the mean concentration of Arsenic, Zinc, Lead, Chromium and Copper in depth soil, respectively are, 5.75, 38.33, 6.25, 22.68 and 31.04 mg/kg, Mercury and Cadmium, respectively, 66.57 and 59.98 μg/kg, the value of all proportion to Natural background values are higher.
Conclusion: Based on estimates of Igeo and RI indices for heavy metals Arsenic, Lead, Zinc, Chromium and Copper in the soil showed no contamination but for Mercury and Cadmium showed severe contamination.
