Background The Sediment Quality Objectives (SQO) indirect effects assessment determines whether sediments meet California’s narrative SQO for human health: Pollutants shall not be present in sediments at levels that will bioaccumulate in aquatic life to levels that are harmful to human health. This program determines whether sediment contamination at a site results in an unacceptable health ris...

introduction soil plays a vital role in human life as the very survival of mankind is tied to the preservation of soil productivity (kabata- pendies and mukherjee, 2007). the purpose of this study is the assessment of heavy metal contamination (zn, mn, pb, fe, ni, cr) of the soil around the khuzestan steel complex. materials and methods for this purpose, 13 surface soil samples (0-10 cm) were t...

The requirements for minimising microbial contamination in pharmaceutical cleanrooms are outlined in regulatory documents published by authorities that include the European Commission1 and the Food and Drug Administration in the USA2. These authorities also suggest the use of risk management and assessment techniques to identify and control sources of microbial contamination3,4. Risk assessment...

Water quality data collection in shallow water areas can be a challenging task. Obstacles encountered in such environments include difficulty in covering large territories and the presence of inaccessible areas due to a variety of reasons such as a soft bottom or contamination. There is also a high probability of disturbing the test area while placing the sensors. This paper describes a NASA-fu...

In this study, the quality of sediment and surface water in two natural wetlands, Paca Tragadero, central region Peru was evaluated using pollution indices, including geoaccumulation index, pollutant load modified degree, potential ecological risk site rank for four heavy metals. Principal component analysis used to identify metal contaminant sources. The determination Fe, Zn, Pb, As performed ...

The fear of contamination is thought to be comprised of two separate but related fears: those pertaining to physical and mental contamination. Previous research on mental contamination involved studies in which more than one independent variable was manipulated simultaneously. In particular, an immoral act (e.g., a non-consensual kiss) had been coupled with an immoral man (e.g., the person who ...