RNR 1001 : Study Guide For Exam 2
Document Summary
Types of pollutants, toxic versus non-toxic (but released in high quantities, such as manure) Acute toxicity, e. g. , h2s- toxic after short exposure. Chronic toxicity, e. g. , ch3hg- toxic when exposed to repeatedly. Methylmercury the most toxic form, subject to considerable bioaccumulation. Trophic state of waterbodies assessed with nutrient levels, chlorophyll levels (index of phytoplankton abundance), secchi disk oligotrophic- can live in an environment that offers very low levels of nutrients mesotrophic moderately fertile eutrophic- rich in minerals hypereutrophic - problems. Best management practices to reduce runoff of chemicals, loss of soil settling ponds and constructed wetlands strip cropping contour farming buffer strips between cultivated land and watercourses. Irrigation problems loss of water through evaporation contamination of water returning to streams waterlogging salinization. Output control, collection and dilutiontrends in emissions of 6 principal pollutants in the u. s. since 1980. End of pipe solutions, bag filters, cyclone filters, electrostatic precipitator, scrubber.
