Arsenic contamination in mining areas (primary or alluvial gold sources) is discussed with specific reference to contamination of soil, sediments, open water and aquatic biota in the Penjom area at Pehang, Malaysia. Modelling and speciation studies were used to determine the geochemical...

The influence of solid speciation of Pb in soils on human bioavailability was studied in a number of areas in the UK. In an old lead mining village Pb concn were raised in both garden soils and house dust; however, Pb levels in the blood of 18 yr olds were within the normal UK range. A density...

A method was developed to test for the integrated effects, synergistic and accumulated, of the various heavy metals considered potential pollutants on plants. Porphobilinogen synthase was measured in centrifugated extracts of leaves of R. communis. Inhibition of enzyme activity by metalic ions was...

In the Zarafshan valley of the Uzbek SSR, the effect of pollution on the frequency and range of chromosome aberrations in a range of plants was studied in 5 ecological zones differing in altitude and extent of pesticide application. The aberration frequency was higher than the control (with no...