Abstract
Fuels like coal and rubber are frequently used for brick burning. However, both coal and rubber contain heavy metals. These heavy metals may elutriate in the wake of fly ash or may adsorb or absorb in the product. The present work deals with the analysis of heavy metals in some samples collected from brick burning industries located in the vicinity of a metropolitan city, Peshawar, Pakistan. Samples from raw clay, product, chimney scale and fossil fuel & rubber were collected and leached with acid mixture. The leachates were concentrated and analyzed by atomic absorption spectrophotometer for the determination of chro mium (Cr), lead (Pb), cadmium (Cd) and anti mony (Sb). It was observed that heavy metals are present in clay, brick and chimney scale. However, significant amount of these metals was observed in chimney scale. It is inferred that such emanations laden with heavy metals are accompanying the stack gases which are being dumped in to the environment. In order to avoid environmental problems, strict environmental regulations shall be enforced and a constant check on these emanations to the environment must be made to ensure clean air act.
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Ahmad, I., Rashid, H. & Rehman, Z.U. Study of heavy metals in some environmental samples. Environ Monit Assess 158, 139–144 (2009). https://doi.org/10.1007/s10661-008-0576-z
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DOI: https://doi.org/10.1007/s10661-008-0576-z