Nutrients retention

Marti E, Aumatell J, Gode L, Poch M, Sabater F (2004) Nutrient retention efficiency in streams receiving inputs from wastewater treatment plants. J Environ Qual 33 285... 

Keywords Nitrogen, Nutrient retention, Phosphorus, Point sources. River, Stream, Wastewater treatment plants. Water scarcity... 

Effects of WWTP Inputs on In-Stream Nutrient Retention. 179... 

Effects of Water Scarcity on In-Stream Nutrient Retention in... 

This chapter aims to review current knowledge on the effects of wastewater treatment plant (WWTP) inputs (as major nutrient point sources) on stream nutrient dynamics, with major emphasis on nutrient loads and in-stream nutrient retention, and to discuss its implications within the context of actual and future scenarios of water scarcity conditions. Following this introduction, the second section of this chapter describes water quality problems associated with wastewater inputs from urban areas and how they are faced within the context of increasing urbanization across the world and its higher impact on water availability. In the third section, we... 

The effect of water scarcity on nutrient retention in WWTP-dominated streams has hardly been explicitly addressed in studies of WWTP impacts (but see [44, 65]). It is also worth noting that a large number of studies have been done in relatively temperate zones (Table 2), although they may not be exempt from water scarcity conditions. Trends observed from the compilation of results provide controversial insights on the potential directions of the influence of water scarcity. For instance. 

Inputs of organic matter and nutrients, benthic metabolism, and nutrient retention at each stream section depend on diffuse and point sources. Yet, under low flow conditions, water and matter transport downstream becomes impeded or discontinued due to stream contraction and fragmentation during dry periods. Therefore, nutrient export from rivers in semiarid regions will depend, more so than in more humid regions, on the interplay between the spatial configuration of organic matter... 

Haggard BE, Stanley EH, Storm DE (2005) Nutrient retention in a point-source-enriched stream. J N Am Benthol Soc 24 29-47... 

Haggard BE, Storm DE, Stanley EH (2001) Effect of a point source input on stream nutrient retention. J Am Water Resour Assoc 37 1291-1299... 

Gil MI, Aguayo E and Kader AA. 2006. Quality changes and nutrient retention in fresh-cut versus whole fruits during storage. J Agric Food Chem 54(12) 4284-4296. 

Soil Fertility Is Determined by Soil Structure and Nutrient Retention... 

SOIL FERTILITY IS DETERMINED BY SOIL STRUCTURE AND NUTRIENT RETENTION... 

Chaubey, I., D. Sahoo, B.E. Haggard, M.D. Matlock, and T.A. Costello (2007). Nutrient retention, nutrient limitation, and sediment-nutrient interactions in a pasture-dominated stream. Trans. Am. Soc. Agric. Biol. Eng., 50(1) 35-44. 

Surface complex models (SCMs) are now finding widespread application in the fields of pollutant retention behaviour (Zachara etal., 1989,1992), the soil chemistry of plant nutrient retention (Goldberg and Sposito, 1984 Goldberg and Glaubig, 1986 Goldberg and Traina, 1987) and the retention of radionuclides by sediments and transport of pollutants by colloids (Davis and Kent, 1990 Dzombakand Morel, 1990 Goldberg, 1992). 

Water and nutrient retention or leaching capacity Coarse-grained sands have larger pores than those found in finer-textured soils. Consequently, coarse sands are typically drained rapidly and have a poor ability to hold water and nutrients. Loamy sands hold more water and nutrients, whereas the available water capacity and nutrient retention ability of clays are high. 

Josefson, A.B., and Rasmussen, B. (2000) Nutrient retention by benthic macrofaunal biomass of Danish estuaries importance of nutrient load and residence time. Estuar. Coastal Shelf Sci. 50, 205-216. 

Phaeocystis blooms in the southern North Sea without impacting on diatoms should decrease nitrate loads. Further MIRO simulations showed that (i) a significant sink of atmospheric C02 was associated with Phaeocystis blooms in the southern North Sea (Gypens et al. 2004), (ii) the coastal ecosystem had a low nutrient retention and elimination capacity, (iii) the trophic efficiency of the planktonic system was low, and (iv) both were modulated by meteorological forcing (Lancelot et al. 2005). 

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