scholarly journals Contrasting Raz-Rru stream metabolism and nutrient uptake downstream of urban wastewater effluent sites

2020 ◽  
Author(s):  
Sarah Holderness Ledford ◽  
Marie Kurz ◽  
Laura Toran
Keyword(s):  
Nutrient Uptake ◽  
Wastewater Effluent ◽  
Stream Metabolism ◽  
Urban Wastewater

Fate of pharmaceuticals in contaminated urban wastewater effluent under ultrasonic irradiation

2009 ◽  
Vol 43 (16) ◽  
pp. 4019-4027 ◽  
Author(s):  
V. Naddeo ◽  
S. Meriç ◽  
D. Kassinos ◽  
V. Belgiorno ◽  
M. Guida
Keyword(s):  
Ultrasonic Irradiation ◽  
Wastewater Effluent ◽  
Urban Wastewater

Invertebrate community responses to urban wastewater effluent pollution under different hydro-morphological conditions

2019 ◽  
Vol 252 ◽  
pp. 483-492 ◽  
Author(s):  
Jordi-René Mor ◽  
Sylvain Dolédec ◽  
Vicenç Acuña ◽  
Sergi Sabater ◽  
Isabel Muñoz
Keyword(s):  
Wastewater Effluent ◽  
Urban Wastewater ◽  
Invertebrate Community ◽  
Community Responses

Influences of Nitrogen and Potassium Fertigation on Nutrient Uptake, Production, and Quality of Pepper Irrigated with Disinfected Urban Wastewater

2013 ◽  
Vol 44 (1-4) ◽  
pp. 767-775 ◽  
Author(s):  
Juana I. Contreras ◽  
Enrique Eymar ◽  
Jose G. Lopez ◽  
Maria T. Lao ◽  
Maria L. Segura
Keyword(s):  
Nutrient Uptake ◽  
Urban Wastewater

scholarly journals Inactivation of viruses in municipal effluent by chlorine

1980 ◽  
Vol 84 (1) ◽  
pp. 63-69 ◽  
Author(s):  
H. G. Hajenian ◽  
M. Butler
Keyword(s):  
Isoelectric Point ◽  
Ph Effect ◽  
Low Ph ◽  
Wastewater Effluent ◽  
Urban Wastewater ◽  
Municipal Effluent ◽  
Ph Values ◽  
Rapid Inactivation ◽  
Apparent Correlation ◽  
Influence Of Ph

SUMMARYThe influence of pH arid temperature on the efficiency of chlorine inactivation of two unrelated picornaviruses in a typical urban wastewater effluent was examined. Temperature, unlike pH, had relatively little effect on the rate of inactivation. The pH effect was complex and the two viruses differed. The f2 coliphage was more sensitive to chlorine at low pH, but at all values there was a threshold above which additional chlorine resulted in very rapid inactivation. The amount of chlorine required for this was less at low than at high pH, although at pH values above 7 the extent of inactivation was about the same. There was no apparent correlation between pH and rate of inactivation of poliovirus but there was a suggestion that at a pH close to the isoelectric point of the virus it was less sensitive to chlorination.

scholarly journals Relating Transient Storage and Whole-System Metabolism with Nitrogen Uptake in Streams

1999 ◽  
Vol 23 ◽  
pp. 93-97
Author(s):  
Robert Hall, Jr. ◽  
Jennifer Tank
Keyword(s):  
Nutrient Uptake ◽  
Nutrient Loading ◽  
Nitrogen Loss ◽  
Nutrient Transport ◽  
Nutrient Retention ◽  
Nutrient Loss ◽  
Transient Storage ◽  
Main Stream ◽  
Stream Metabolism ◽  
System Metabolism

Streams are important landscape features because they provide an avenue for nitrogen loss from a watershed to downstream ecosystems and eventually the ocean; however, in-stream processes can control nutrient transport and export (e.g. Burns 1998). Nitrogen is an important element because it limits rates of primary production in many terrestrial and aquatic ecosystems. Alteration of the forms, timing, and concentration of nutrients is a central property of lotic systems (Fisher et al. 1998). Understanding controls on both transport and retention are central to predicting how streams influence nutrient loss from watersheds (Hedin et al. 1995, Likens and Bormann 1995, Burns 1998) and nutrient loading to downstream ecosystems (Howarth et al. 1996). With increased global nutrient loading from atmospheric sources and fertilizers, streams may play an important role in the retention, transformation and export of nutrients from the upland landscape. We know little about what controls nutrient uptake and transport in streams. There are many studies that show effects of hydrologic, biologic, and geomorphic influences on nutrient transport, but rarely have all aspects been considered in the same study. One potentially important geomorphic control is transient storage. Transient storage is water that is separated from the main channel flow and therefore, moves downstream more slowly than water in the main stream channel, which should facilitate nutrient uptake. Transient storage has been suggested to play an important role in nutrient retention in streams from both theoretical (Mulholland and DeAngelis 2000) and empirical perspectives (Valett et al. 1996, Mulholland et al. 1997). Additionally no studies have linked whole stream measures of metabolism with stream nutrient uptake, though we expect that greater C fixation or respiration will cause higher demand for nutrients. The objective of our study was to relate nutrient uptake with geomorphic and whole stream metabolism in 8 streams in Grand Teton National Park.

Effect of Some Natural Mineral Waters in Nutrient Uptake by Caco-2 Cells

2010 ◽  
Vol 80 (2) ◽  
pp. 131-143 ◽  
Author(s):  
Pedro Gonçalves ◽  
João R. Araújo ◽  
Fátima Martel
Keyword(s):  
Nutrient Uptake ◽  
Mineral Waters ◽  
Distilled Water ◽  
Natural Mineral ◽  
Minute Exposure

We studied the effect of some mineral waters and some of their constituents on the apical uptake of 14C-butyrate (14C-BT) and 3H-O-methyl-D-glucose (3H-OMG) by Caco-2 cells. Uptake of 14C-BT increased after a 20-minute exposure to 1 % (v/v) distilled water, and, compared to distilled water, it was decreased by Pedras Salgadas® 1 % (v/v) and Melgaço® 5 % (v/v), and increased by Vidago® 5 % (v/v). Moreover, it increased after a 48-hour exposure to Vidago® or Melgaço® waters (5 % (v/v)). Also, uptake of 14C-BT was reduced after a 20-minute exposure to MgCl2, MgSO4, or CaCl2. Uptake of 3H-OMG was reduced after a 20-minute exposure to Melgaço® water [1 % (v/v)], when compared to distilled water. Also, a 48-hour exposure to Pedras Salgadas® or Melgaço® water (5 % (v/v)) increased and decreased uptake, respectively. Finally, uptake of 3H-OMG decreased after a 20-minute exposure to MgSO4 or NaF. In conclusion, uptake of 14C-BT and 3H-OMG by Caco-2 cells is differently modulated by distinct mineral waters.

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