Soil pesticides

Soil conditioning Soil disinfectant Soil flushing Soil fumigants Soiling of fabrics Soil modification Soil pesticides Soil remediation Soils... 

Yaron B (1978) Some aspects of surface interactions of clays with organophosphorus pesticides. Soil Science 125 210-216... 

Table VI. Pesticide Soil. Concentration In Relation to Depth from ...

Table VII. Pesticide Soil Concentrations in Relation to Depth from Averaging Four Sampling Areas in On... 

Use of l,2-dibromo-3-chloropropane as a pesticide, soil fumigant and a nematocide resulted in the direct release of this compound to the environment. Its production and use as an intermediate in organic synthesis also may have resulted in its release to the environment through various waste streams. It has been detected at low levels in ambient and urban air, groundwater, drinking-water and soil samples (United States National Library of Medicine, 1997). 

Leaching - [METALLURGY - EXTRACTIVE METALLURGY] (Vol 16) - [HYDROTHERMAL PROCESSING] (Vol 13) - [METALLURGY - SURVEY] (Vol 16) -of ores using sulfur [SULFUR] (Vol 23) -of pesticides [SOIL CHEMISTRY OF PESTICIDES] (Vol 22)... 

Kruglov, Y.V., N.G. Garankina, and T.O. Lisina (1996). Bioremediation of soil polluted with the herbicide prometryn. In SETAC-Europe Conference on Pesticides, Soil Microbiology and Soil Quality, pp. 185-186. 

Sauer, T.J. and T.C. Daniel (1987). Effect of tillage system on runoff losses of surface-applied pesticides. Soil Sci. Soc. Am. J., 51 410 115. 

Nonsingularity of Pesticide-Soil Interactions 136 Degradation Rates of Pesticides 139 Reaction Rates and Mechanisms of Organic Pollutants 143 Supplementary Reading 144... 

However, when data from many of the kinetics studies on pesticide-soil interactions were plotted according to the parabolic diffusion equation, initial nonlinearity resulted (Fig. 6.4). This suggested that only at longer times did the reaction process conform to PD. The rate-limiting step for this reaction is diffusion into or out of micropores. 

Chemical and microbiological transformations of the pesticide while the experiment is being conducted could also cause nonsingularity in pesticide-soil sorption-desorption isotherms. Hamaker and Thompson (1972) theorized that a portion of a sorbed pesticide is more strongly held than... 

Another aspect of pesticide-soil interactions that is very important in predicting the effect of pesticides on environmental quality is the degradation rate. It is not the purpose of this discussion to give an in-depth discussion of pesticide degradation in soils. Numerous reviews are available on transformations, metabolic pathways, persistence, and tl/2 values of... 

Aliphatic and alicyclic amines form one of the most extensively used categories of compounds in a variety of manufacturing industries. These compounds are first-phase materials for chemical synthesis, intermediates, pharmaceuticals, pesticides, soil sterilizers, and several kinds of solvents, rubber products, rocket propellants, and plastic monomers. This chapter discusses the safety and toxicity of selected compounds handled by workers in different industries. More information and extensive literature are available in several study reports on members of this important group.31,32... 

Ayuso R. A., Foley N. K., andLipfert G. present part of an extensive study of the coastal environment in the State of Maine (USA) where the occurrence of elevated levels of arsenic in drinking water (>0.010 mg/L) has prompted multifaceted research to understand the cause of this situation. A detailed Pb isotopic study of pesticides is used to understand the source, distribution, and fate of As and Pb in pesticides, soil, bedrock, and waters. 

Soils vary greatly in composition and reactivity. Many complex and dynamic processes occur continuously in most soils composed primarily of mineral and organic matter, water, and air. The soil atmosphere is composed of oxygen, carbon dioxide, nitrogen, and several minor gases whereas the mineral fraction varies in amounts of sand, silt, and clay and in types and amounts of clay minerals. Moreover, hydration and base saturation of the clay minerals also vary considerably. The organic matter and mineral colloids present in the soil contribute directly and indirectly to the extremely active nature of pesticide-soil systems. Since soil water contains many soluble compounds, it serves as an essential medium for many chemical and physical processes. The extreme complexity of these soil systems has been the primary reason that so few fundamental studies have been undertaken involving the ultimate fate of pesticides in soils. 

Leaching predictions were satisfactory for bromide tracer in soil and soil pore water (factor of 2) and, after site specific calibrations, estimates of pesticide soil pore water concentrations were also within a factor of 2. 

Herbicides, pesticides Soils, fruit and vegetables and their preserves, animal tissues, food C02-tmethanol, acetone, ethanol, water... 

Soil organic matter influences how much water the soil can hold before it begins to move downward. Soil containing organic matter has greater ability to stop the movement of pesticides. Soils in which plants are growing are more likely to prevent pesticide movement than bare soils. 

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