TAILIEUCHUNG - WATER POLLUTION BY AGRICULTURE AND OTHER RURAL USES

The solid product is a wet sludge of calcium sulfate which can be disposed of easily. So FGD does not eliminate pollution. What it does accomplish is to convert a big problem (emission of large volumes of air contaminated by harmful levels of gaseous SOx) into a small problem (collection and disposal of scrubber sludge). Dealing with the problem of air pollution is not cheap. An FGD system installed in a newly constructed power plant represents about one-third of the total cost of building the entire plant. Energy is also required to operate an FGD system, meaning that for two otherwise comparable power plants, one with. | WATER QUALITY AND STANDARDS - Vol. II - Water Pollution by Agriculture and Other Rural Uses - Yuichi Fushiwaki Yasumoto Magara WATER POLLUTION BY AGRICULTURE AND OTHER RURAL USES Yuichi Fushiwaki Kanagawa Prefectural Institute of Public Health Chigasaki Japan and Yasumoto Magara Hokkaido University Sapporo Japan Keywords agriculture degradation degradation by-products dioxin drinking water nitrate pesticide. Contents 1. Introduction 2. Pesticides . Behavior of pesticides in the atmosphere . Run-off rate of pesticides from rice fields . Behavior in soil . Degradation by-products in water purification system 3. Dioxin group . Characteristics of dioxin group . Impurity in agricultural chemicals . Contribution of agricultural activity to dioxin concentration in environmental water 4. Nitrate . Health effects caused by nitrate . Nitrate pollution from agricultural activities . Measures against nitrate contamination Control of fertilizers Cultivation techniques Bio-remediation Comprehensive measures from non-point agricultural sources Water treatment technologies Glossary Bibliography Biographical Sketches Summary Contemporary agriculture heavily depended on chemical substances in order to achieve the Green Revolution . Natural organic matter or compost was rapidly replaced by chemical fertilizers and pesticides were widely used to secure the highest yield of desired crops. Pesticides are sprayed in paddy fields or crop fields for agricultural activities worldwide. In general only a small part of the pesticide is effectively applied to the farm products most of it enters the soil. As a consequence of their persistency and bioaccumulation properties certain pesticides which are able to accumulate in higher organisms even in human beings Encyclopedia of Life Support Systems EOLSS WATER QUALITY AND STANDARDS - Vol. II - Water Pollution by Agriculture and Other Rural Uses - Yuichi Fushiwaki Yasumoto Magara have .

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