Phosphorus Sample Clauses

Phosphorus vi. Phosphate ester or phosphate diester synthetic oil.
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Phosphorus. In a. L. Page (Ed.), Methods of soil analysis: Part 2. Chemical and micro- biological properties. Agronomy Mongraphs, 9(2), ASA/ SSSA, Madison. Xxxxx, S. R., Xxxx, C. V, Xxxxxxxx, F. S., Xxxx, L. A. (1954). Estimation of available phosphorus in soils by extraction with sodium bicarbonate. Vol. 939, U.S. Dept. of agriculture, Washington DC, 1-19. Xxxxxxxxx, X. X. (1983). Xxxx surface interaction model for trace- metal toxicity to fishes: role of complexation, pH, and water hardness. Environmental Science and Technology, 17, 342– 347. Xxxxxxx, X. X., & Xxxxxx, X. X. (1974). Phosphate release and sorption by soils and sediments: effect of aerobic and anaer- obic conditions. Science, 186, 53–55. Xxxx, X., & Xxxxxx, V. (1997). Phosphorus balance of a polytrophic shallow lake with the consideration of phospho- rus release. Hydrobiologia, 342, 43–53. Xxxxxxx, X., Xxxxx, X., & Xxxxxxxx, X. (2017). Modelling the concentrations of dissolved contaminants (Cd, Cu, Ni, Pb, Zn) in floodplain soils. Environmental Geochemistry and Health, 39(2), 331–344. Xxxxxxx, P. F., Xxx, X., Xxx, X., Xxx, X., Xxxxxx, X., & Xxxxxxxx, X. X. (2009). Characterization of soil heavy metal pools in xxxxx xxxxxx in Taiwan: chemical extraction and solid-solution partitioning. Journal of Soils and Sediments, 9, 216–228. Xxxxxxxx, X. X., Xxxxxxx, X. X., Xxxxxx, S. C., Xxxxxxxxx, X., Xxx Xxxx, M., Xxxxxxxxxxx, P. F. M., Xxxx, J. P. M., Xxxxxxxxxx, X. X., & Xxxxxx, X. X. (2018). Respiration and oxidation by bioturbating Tubificidae alter biogeochemical processes in topsoil. Aquatic Sciences, 81(13). xxxxx://xxx.xxx/10.1007 /s00027018-0610-3. Xxxxxxxx, X. (2004). Ecology of shallow lakes. Norwell: Kluwer academic publishers.‌ Xxxxxxxx, X. X., Xxxxxxxx, X., Xxxx, X. X. X., & Xxx xxx Xxx, S. E. A. T. M. (2005). Modelling of the solid-solution partitioning of heavy metals and arsenic in embanked flood plain soils of the rivers Rhine and Meuse. Environmental Science and Technology, 39, 7176–7184. Xxxxxxxxx, L. R., Xxxxxxx, X. X., & Xxxxxx, F. T. A. (1994). Comparison of extractions methods for evaluation Fe and P in flooded rice soils. Plant and Soil, 165, 219–225. Xxxx, X. (1987). Surface chemical aspects of the distribution and fate of metal ions in lakes. In X. Xxxxx (Ed.), Aquatic surface chemistry. New York: Wiley Interscience. Xxxxxxxx, A. J. P., Xxxxxx, L. P. M., Xxxxxx, M., Xxxxx, X., & Xxxxxxx, J. G. M. (2001). Controlling phosphate release from phosphate-enriched sediments by adding various i...
Sample 1
Phosphorus. Historically, Lake Erie was considered to be very polluted in the 1960s and 1970s, with high levels of phosphorus and nitrogen. Efforts by the governments of Canadian and U.S.A. since then have resulted in improvements to the water quality in Lake Erie. However, nutrient management remains a top priority for improving the lake (Environment Canada and U.S. EPA, 2009c). This is because in the last decade, in-lake concentrations of total phosphorus have been on the rise and tributary loadings of dissolved phosphorus are increasing. Data from the last several years indicate that more phosphorus is leaving Lake Erie in the waters of the Niagara River than is entering the Lake from the major tributaries. (Environment Canada and U.S. EPA, 2008)
Sample 1
Phosphorus. Report actual load reductions in GRTS as project-specific information. Request load reduction estimates from new projects. Water Quality Control Division Goals - Part I Clean Water Act Short-term Goals Objective(s) Milestone(s) / Performance Measure(s)
Sample 1
Phosphorus. Phosphorus occurs naturally in water from organically bound phosphates from plant and animal matter, as well as from anthropogenic sources such as runoff from fertilizer, industrial soaps, sewage, and disturbed soil (Adopt-A-Stream, 2001). Phosphorous is a key element required by freshwater plants and it is generally present in the least amount relative to need in water bodies (EPA Gold Book, 1986). If the total phosphorus level is higher than 0.03 ppm P, then increased plant growth will occur which will lead to oxygen depletion. If the total phosphorus level is above 0.10 ppm P plant growth will be sufficiently stimulated to cause eutrophication (Adopt-A-Stream, 2001). Levels of phosphorus that exceed 0.10 ppm P indicate that the stream has been polluted by human sources and that the stream health is not suitable for the aquatic species (Adopt-A-Stream, 2001). Nitrate Nitrogen supports aquatic life and occurs naturally in water in the form of organically bound nitrogen, ammonia (NH3), nitrite (NO2), and nitrate (NO3). In addition, nitrogen is used widely in the United States as a main component of fertilizer: 10,500,000 metric tons of nitrogen is applied to cropland pastures each year and 5,900.000 metric tons of nitrogen is used in animal manure (Xxxxx, 2000). Nitrogen’s use in agriculture is a main reason why nitrogen infiltrates into groundwater and is also found in streams due to runoff. Unpolluted waters have a nitrate-nitrogen level below 1.00 ppm NO3-N; levels above 1.00 ppm NO3-N may indicate a sewage overflow (Adopt-A-Stream, 2001). Higher levels may indicate the presence of fertilizers and animal waste products in the waterbody. The United States drinking water standard, or maximum contaminant level of nitrate is 44.27 ppm NO3-N, but it is recommended that infants do not drink water that has nitrate present in excess over 10.00 ppm NO3-N because if high levels of nitrate are consumed by infants then this can cause infant methemoglobinemia or Blue Baby Syndrome (Xxxxx, 2000). It has been reported that levels of nitrate or nitrogen at or below 5.00 ppm NO3-N should be protective of most warm water fish (EPA Gold Book, 1986). Dangerous levels of nitrate that exceed 5 ppm NO3-N are unlikely to occur in natural surface waters therefore restrictive criteria are not recommended by the EPA (EPA Gold Book, 1986). However, other agencies that are interested in water quality, such as Adopt-A Stream, have put forth regulation criteria for nitrate. Georgia’s...
Sample 1
Phosphorus. Report actual load reductions in GRTS as project- specific information. Request load reduction estimates from new projects.
Sample 1
Phosphorus. The concentration should be limited to the extend necessary to prevent nuisance growths of algae, weeds and slimes that are or may become injurious to any beneficial water use. (Specific phosphorus control requirements are set out in Annex 3.)
Sample 1
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