Variation of hazardous substances in sewage ecotoxicological assessment

Risk assessment of hazardous substances revisited

It is needless for occupational health doctors and scientists to mention about the importance of risk assessment of hazardous substances used in workplaces. Since the US Supreme Court sentenced the " benzene verdict " requiring better ground for the occupational exposure limit (OEL) for benzene in 1980, the research and scientific knowledge on risk assessment for hazardous substances have been ...

Hazardous Substances and Activities

Risk assessment of hazardous impacts on urbanization and industrialization activities based upon toxic substances

A risk assessment study was conducted to predict the expected hazardous influence on the ecosystem resulted from urbanization and industrialization activities at Helwan area, Egypt. To achieve these goals, soils, plants and water samples were collected from Helwan area, and their total concentrations of inorganic contaminants (Cd, Cr, Co, Cu, Fe, Mn, Ni, Pb, and Zn) and organic pollutants; such...

Ecotoxicological effect assessment and risk characterisation of selected contaminants in sewage sludge

Ž .Linear alkylbenzene sulphonates LAS are a group of anionic surfactants, characterised by having both ahydrophobic and a hydrophilic group. LAS is one of the major ingredients of synthetic detergents and surfactants andis used world-wide for both domestic and industrial applications. LAS is relatively rapidly aerobically degraded, butonly very slowly or not at all degraded und...

Advisory Committee on Hazardous Substances

I. Review information and studies on the environmental exposure and effects of nanoparticulate silver; II. Comment on known or predicted environmental exposure levels and whether these present a human health or environmental risk; III. Comment on the nature of appropriate measures to minimise risks, if these are felt to be necessary at this point in time; IV. Consider what action should be take...