Assessment of heavy metals and PCBs [polychlorinated biphenyls] at sludge application sites [Ontario, Canada]

Soils and plant materials were sampled at 10 sludge application sites in Ontario and were analyzed for heavy metals and polychlorinated biphenyls (PCBs). In general, sludge application increased the total metal and PCB contents of receiving soils, and the largest increases usually coincided with the...

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Bibliographic Details
Published in:Journal - Water Pollution Control Federation 1983-01, Vol.55 (2), p.187-195
Main Authors: Webber, M.D, Monteith, H.D, Corneau, D.G.M
Format: Article
Language:English
Subjects:
Agricultural soils
Agrology
Corn
Ecological Effects
Plant products
polychlorinated biphenyls
Sewage sludge
Sludge
Sludge treatment
Soil pollution
Soil samples
Soil treatment
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Summary:Soils and plant materials were sampled at 10 sludge application sites in Ontario and were analyzed for heavy metals and polychlorinated biphenyls (PCBs). In general, sludge application increased the total metal and PCB contents of receiving soils, and the largest increases usually coincided with the largest estimated loadings. Metals extracted by diethylenetriamine-pentaacetic acid (DTPA) in the receiving soils were also increased and were well correlated with the total metals. Results of these studies indicated that sludge application according to Ontario guidelines will not cause deleterious uptake of heavy metals by field crops. It seemed that the guidelines allow an appreciable safety margin, which is desirable because sludge composition may vary widely with time.
ISSN:0043-1303
2327-7467