Aquatic water transportable degradation product

T(he increasing development and use of insecticides and other pesticides constitute a growing hazard for contaminating our water supplies. To keep pace with the use (5,6) of these toxicants, more information is needed on distribution, transport, exchange mechanism, degradation products, and metabolites of these substances. Thus, convenient and sensitive methods of analysis are essential to the success of research in this field. Furthermore, pesticide levels in water can be monitored more accurately by improved analytical techniques. Accurate and rapid procedures are especially needed when prompt information or action is necessary. Even when low concentrations of pesticides do not show immediate adverse effects, detrimental results may eventually occur, since it has been observed that a number of these toxicants are concentrated in a variety of aquatic plants and animals. 

In air, di- -butyl phthalate may be adsorbed to particulate matter or occur as a vapor. Di- -butyl phthalate is expected to decompose in the air, or be transported to water and/or soil by wet (snow or rain) or dry (wind and settling) deposition. Di- -butyl phthalate is taken up from water by a variety of aquatic organisms. In water and soil, di-n-butyl phthalate is subject to microbial degradation degradation in the presence (aerobic) and absence (anaerobic) of oxy gen has been reported. Exposure of the general population to di- -butyl phthalate may occur through contact with contaminated air, water, food, soil, and/ or products in which di- -butyl phthalate is intentionally incorporated. 

Soil erosion control. Soil erosion and runoff are serious land degradation problems in arid and semiarid regions caused either by rain or wind. It is a significant environmental problem for agricultural lands that results in destruction and eventual abandonment of the land and the loss of civiUzation itself. Sediment in runoff from agricultural landfiUs in reservoirs and rivers endangers aquatic life and reduces soil productivity. Chemicals transported with the sediment may cause water quaUty problems in lakes and streams. Land classification... 

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