Chlorobenzenes in field soil with a history of multiple sewage sludge applications

Article Abstract:

Data from an experiment involving multiple sludge applications to agricultural land in the UK from 1942 to 1961 were examined to understand the long-term behavior of chlorobenzenes (CBs) in sewage sludge-amended soils. The results showed that 10% of CBs have remained in amended soils up to the 1990s, while the rest have been lost mainly through volatilization soon after soil amendment. Hexachlorobenzene is the most persistent CB, remaining 10 years longer than other CBs. 1,4-dichlorobenzene increased during the 1960s in both experimental and control soils, probably from atmospheric deposition and trace level impurities in pesticides.

Sewage sludge, Organic fertilizers, Chlorobenzene, Chlorobenzenes, Sewage sludge as fertilizer

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Evidence for an increase in the cadmium content of herbage since the 18602

Article Abstract:

A long-term study at Rothamsted Experimental Station in the UK has shown an increase in the cadmium level of plant matter since 1861. Atmospheric deposition, both in soils and directly on the foliage, and cadmium-laden phosphate fertilizers are all responsible. Human intake of cadmium, which has a cumulative toxic effect on the kidneys, has most likely increased. The most controllable preventive measure would be to reduce the cadmium content of phosphate fertilizers in their manufacture and in the selection of phosphate rock.

Soils, Cadmium, Soil chemistry

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PAHs in air adjacent to two inland water bodies

Article Abstract:

Atmospheric deposition data inputs were evaluated based on air polynuclear aromatic hydrocarbon (PAH) concentration data adjacent to two UK inland water bodies. The sites were classified as semiurban or rural based on PAH air levels, compound ratios and ambient aerosol properties. Both sites generated greater suspended particulate and PAH levels during winter, which showed greater emissions for the season.

United Kingdom, Atmospheric chemistry, Polycyclic aromatic hydrocarbons, Polycyclic aromatic compounds

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