نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه فسا

2 دانشکده کشاورزی و منابع طبیعی داراب، دانشگاه شیراز

چکیده

کارخانه­های سیمان یکی از آلاینده­ترین صنایع در کل دنیا هستند. تحقیق حاضر با هدف بررسی وضعیت آلودگی فلزات سنگین سرب، نیکل، کادمیوم، آهن، منگنز، روی و مس در خاک­های اطراف کارخانه سیمان داراب انجام شد. از این­رو، تعداد 30 نمونه خاک از عمق 0-30 سانتی­متری خاک اطراف کارخانه برداشت شد. غلظت فلزات سنگین توسط دستگاه جذب اتمی اندازه گیری شد. نتایج نشان داد میانگین مقادیر کل کادمیوم، نیکل، مس، سرب، روی، آهن و منگنز در خاک­های منطقه به­ترتیب 73/1، 52/35، 71/13، 98/27، 97/26، 27/1039 و 71/590 میلی­گرم بر کیلوگرم می­باشد. بر اساس نتایج، میانگین کادمیوم در خاک­های منطقه (71/1 میلی­گرم بر کیلوگرم) از استاندارد جهانی USEPA بالاتر است. میانگین غلظت فلزات سنگین در منطقه مورد مطالعه به ترتیب به صورتFe > Mn > Ni > Pb > Zn > Cu> Cd  می­باشد. میانگین غلظت کل سرب، نیکل، روی، مس و کادمیوم با حداکثر مقدار مجاز آن در خاک اختلاف معنی­داری دارد و کمتر از آن بود (P<0/01). نتایج شاخص خطر بالقوه بوم­شناختی نشان داد 100 درصد نمونه­ها دارای شاخص خطر کم می­باشند. بر اساس نتایج، منطقه مورد مطالعه به لحاظ فلزات منگنز، کادمیوم، نیکل و سرب دارای درجه آلودگی متوسط است. شاخص بار آلودگی برای همه ایستگاه­ها کمتر از واحد است شاخص بار آلودگی در منطقه نزدیک به غلظت طبیعی و غیرآلوده را نشان داد. به­طور کلی، اگر­چه غلظت فلزات سنگین در خاک­های منطقه مورد مطالعه در وضعیت بحرانی آلودگی نیست ولی برنامه­ریزی جهت کنترل انتشار فلزات سنگین و سایر آلاینده­ها باید مورد توجه قرار گیرد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of Contamination of Some Heavy Metals in the Soils around the Darab Cement Factory, Fars Province

نویسندگان [English]

  • Esfandiar Jahantab 1
  • Alireza Mahmoodi 2
  • Hamidreza Boostani 2

1 Fasa University

2 College of Agriculture and Natural Resources of Darab, Shiraz University

چکیده [English]

Cement factories are one of the most polluting industries in the world. In this regard, the purpose of this study is to investigate the contamination of heavy metals lead, nickel, cadmium, iron, manganese, zinc and copper in the soils around Darab Cement Factory. 30 soil samples were taken from a depth of 0-30 cm from the soil around the Cement Factory. Heavy metal concentrations were measured by atomic adsorption spectrometry. The results showed that the mean values of cadmium, nickel, copper, lead, zinc, iron and manganese in the soils of the region were 1.73, 35.52, 13.71, 27.98, 26.97, 1039.27, and 590.71 mg kg-1 respectively. The average cadmium in the soils of the region (1.71 mg kg-1) is higher than the maximum standard of cadmium in the soils of the world. The average concentrations of metals in the study area are Fe> Mn> Ni> Pb> Zn> Cu> Cd, respectively. The results showed that the mean concentrations of lead, nickel, zinc, copper and cadmium were significantly different from the maximum allowable amount in the soil and was less than that (P <0.01). The results of the risk index showed that 100% of the samples have a low risk index. The study area has a moderate degree of pollution in terms of manganese, cadmium, nickel and lead metals. The pollution load index for all stations is less than 1, indicating the pollution load index in the area close to the normal and non-polluted concentration. In general, although the concentration of heavy metals in the soils of the study area is not in a critical state of pollution, but planning to control the release of heavy metals and other pollutants should be considered.

کلیدواژه‌ها [English]

  • Soil pollution
  • heavy metals
  • Darab Cement Factory
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