Iğdır ili 080 Devlet Karayolu Boyunca Tarım Topraklarında Ağır Metal Kirliliği

Doğal topraklar, kentleşme, sanayileşme ve aşırı gübre ve pestisit kullanımı gibi çeşitli insan faaliyetleri ile kirlenmiştir. Bununlabirlikte, özellikle uluslararası olanlar olmak üzere otoyolların yanındaki tarımsal topraklar, yoğun yol trafiğine bağlı olarak nispetendaha yüksek ağır metal kirliliği riski altındadır. Bu nedenle, Türkiye Iğdır'da 080 uluslararası karayolunda araç kaynaklı ağır metalkirliliğini aydınlatmak için 24 örnekleme noktasından toplam 72 toprak numunesi 5 km aralıklarla alınmıştır. Toprak numunelerininözellikleri belirlendikten sonra, toplam ve bitki tarafından alınabilir miktarları DTPA ile ekstrakte edilerek ölçülmüştür. Sonuçlar, toplamve alınabilir ağır metal konsantrasyonlarının büyük ölçüde otoyola olan mesafelere bağlı olduğunu göstermiştir. Genel olarak, otoyoladaha yakın mesafe, daha yüksek element konsantrasyonları ölçülmüştür. Uzaklıktan en çok etkilenen elementler demir ve çinkoolmuştur (p> 0.01) ve bunları nikel (p Cu> Zn> Fe> Mn ve alınabilir değerler için Cu> Zn>Mn> Fe> Ni şeklinde sıralanmıştır. Kirlilik yük endeksleri (PLI) genel olarak nikel (Ni) değerleri dışında toplam mikro besinlerin kirlilikendekslerinden (PI) daha yüksek ve genellikle alınabilir değerlerin kirlilik endekslerinden (PI) daha düşük hesaplanmıştır. Ni ve Cu'nunnispeten daha kısa sürede çevre açısından riskli seviyelere ulaşma ihtimalinin yüksek olduğu sonucuna varılabilir.

Heavy Metal Pollution in the Agricultural Soils alongside Highway080 of Igdir Province

Natural soils have been polluted by variety of human activity such as urbanization, industrialization and excessive fertilizer and pesticideusage. However, the agricultural soils alongside the highways, especially those of international ones, are relatively at higher risk ofheavy metal pollution depending on the intensive track traffic. Therefore, total of 72 soil samples from the 24 sampling sites were takenat 5 km interval to elucidate the vehicle-induced heavy metal pollution on the international highway 080 in Igdir, Turkey. Aftercharacterising the soil samples, their total and DTPA extractable or plant available concentrations were determined. The results showedthat the concentrations of total and available heavy metals were highly dependent on the distances from the highway. In general, thecloser distance to highway resulted in higher element concentrations. Iron and zinc were the most affected elements (p>0.01), andfollowed by nickel (pCu>Zn>Fe>Mn for the total concentrations and Cu>Zn>Mn>Fe>Nifor the available fractions. The pollution load indices (PLI) were generally higher than the pollution indices (PI) of total micronutrientsexcept nickel (Ni) values, and were generally lower than the pollution indices (PI) of available ones. It can be concluded that Ni and Cuwere likely to reach environmentally risky levels in relatively shorter time.

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