Autori: Rule, KL; Comber, SDW; Ross, D; Thornton, A; Makropoulos, CK; Rautiu, R

Editorial: 20 (3), 177, Water and Environment Journal, 20 (3), p.177-184, 2006.

Rezumat:

Crude influent sewages were collected from 30 English wastewater treatment works representing rural,urban and industrial catchments as part of a screening study to assess the significance of the concentrations of substances from the Water Framework Directive priority pollutants list in crude sewage. Composite samples were analysed for a range of determinands including metals and organic compounds. Of the determinands quantified, the pesticides were almost exclusively below the limit of detection. Most trace metals(with the exception of mercury)were detectable in all wastewaters, reflecting their ubiquitous nature. Organic determinands detected in the influent at mg/L levels included surfactants (linear alkylbenzenesulphonates and nonylphenolethoxylates), phthalates (diethylhexylphthalate), polynuclear hydrocarbons and solvents. Trace concentrations of trichlorobenzene, tributyltin and polychlorinated biphenyl 153 were detected in a limited number of works. Little correlation was observed between run-off or trade effluent inputs entering the works and determinand concentration(chromium being the only exception).

Cuvinte cheie: crude sewage, metals, organics, priority substances, urban catchment, waste water treatment works.