Effect of brick kilns emissions on heavy metal (Cd and Cr) content of contiguous soil and plants
2012
Ismail, M. (Sugar Crops Research Inst., Mardan (Pakistan)) | Muhammad, D. (Agricultural Univ., Peshawar (Pakistan). Dept. of Soil and Environmental Sciences) | Khan, F.U. (Pakistan Council of Scientific and Industrial Research, Peshawar (Pakistan)) | Munsif, F. | Ahmad, T. | Ali, S. | Khalid, M. | Nur-ul-Haq | Ahmad, M.
The effect of brickworks emissions on heavy metal content of soil and plants around the brick kiln chimneys was studied in the year 2006. Two brick kilns (A and B) about 600m away from Ring Road at Sufaid Dheri on southern side of Ring Road Peshawar were selected for this study. The two bricks kilns were North-South to each other with 300m distance in between, such that South direction from brick kiln A was north for brick kiln B. Eighteen soil and eighteen plant samples were collected from eighteen different sites at different distances i.e. 100, 200 and 300m from brick kiln chimney in East, West, North and South directions. In addition sixteen dust samples were also collected in plastic buckets installed at a height of 3m in different directions of the brick kiln chimney. Concentration of heavy metals in plants was determined using the wet acid digestion method. Cd and Cr concentration in plants for Brick kiln A & B respectively were (2.03 & 1.9, 5.76 & 3.5 mg per kg). Concentration of heavy metals in soil (AB-DTPA extractable Cd, Cr for Brick kiln A & B respectively were (0.03 & 0.41, 0.10 & 0.08 mg per kg). High load of dust with 23.8 to 46.0 g m-2 month-1 at 50m distance indicated higher pollution near the brick kiln chimneys. Heavy metals in the dust samples showed that Cd and Cr are added into environment with a rate of 0.08 and 0.52 mg m-2 month-1, respectively at 50m distance from brick kiln chimney.
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