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by M. D Webber
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  • Author:
    M. D Webber
  • ISBN:
    0662114604
  • ISBN13:
    978-0662114604
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  • Publisher:
    Ontario Ministry of the Environment, Pollution Control Branch (1981)
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The sewage sludge treated soil contained . 2±0. Assessment of heavy metals and PCB’s at selected sludge application sites in Ontario

The sewage sludge treated soil contained . 71µg/g PCB. Potato plant leaves and tuber pulp contained less than the detectable level (<0. 007µg/g) of PCB. Potato peels contained . 4µg/g PCB which is less than the FDA tolerance limit. From these data it appears unlikely that potatoes grown in PCB-contaminated soil will absorb sufficient quantities of PCBs to pose a significant health risk, especially if the potatoes are peeled prior to eating. Assessment of heavy metals and PCB’s at selected sludge application sites in Ontario. Toronto, Ontario, Canada.

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Assessment of trace metal concentrations in street-deposited sediments around some selected electronic repair workshops in Owerri, Imo State, Nigeria, was carried out.

The obtained information may provide a better understanding of environmental risks of heavy metals in wastes. Assessment of trace metal concentrations in street-deposited sediments around some selected electronic repair workshops in Owerri, Imo State, Nigeria, was carried out.

The basic metallurgical processes used for the extraction of metals from their ores are Grinding, Concentration, Floatation Tank, Rotation, Smelting and Refining. Metallurgy is subdivided by characteristics into ferrous metallurgy also known as black metallurgy and non-ferrous metallurgy also known as coloured metallurgy. Extractive metallurgy

The heavy metal pollution index (HPI), heavy metal evaluation index (HEI) and degree of contamination (C d ) were used to evaluate . Risk assessment methods and parameters previously reported by Wongsasuluk et al. ( 2014 ) were used in the present study.

The heavy metal pollution index (HPI), heavy metal evaluation index (HEI) and degree of contamination (C d ) were used to evaluate the drinking water quality. The HPI and HEI methods provide an overall quality of the water with regard to heavy metals using the ratios of monitored values of the desired number of parameters and the maximum admissible concentrations of the respective parameters.

The concentrations of heavy metals in both river water and soil were within .

The concentrations of heavy metals in both river water and soil were within the international standards. Soil pollution refers to the presence of chemical or substance out of place and/or present at higher than the normal concentration that has adverse effects on any non-targeted organism, and poses an increasing threat to human health and environmental quality.

Remediation of heavy metal contaminated soils is necessary to reduce the .

The term sewage sludge is used in many references because of its wide recognition and its regulatory definition.

Assessment of heavy metals in vegetables irrigated with Awash River in selected farms around Adama. Department of Biology, Dilla University College of Natural and Computational Science, P. O. Bo. 19 Dilla, Ethiopia. In addition to this, excessive application of nitrogen and other inorganic fertilizers and organic manures to these vegetables can accumulate high levels of nitrate and other anions as well as heavy metals. Heavy metals, such as cadmium, copper, lead, chromium and mercury, are important environmental pollutants, particularly in areas under irrigated with wastewater.