Phosphorus Sorption Capacities of Wetland Soils and Stream Sediments Impacted by Dairy Effluent

Reddy, K. R.; Connor, George A O; Gale, P. M.

doi:10.2134/jeq1998.00472425002700020027x

Cited by 144 publications

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“…0,10,50,100,200,250,300,350,400 and 500 mg P L -1 . No microbial inhibitors were added to the test systems because they cause the lysis of microbial cells and increase the level of dissolved P in solution (Reddy et al 1998), leading to an underestimation of P sorption (Bridgham et al 2001). There were five replications for each soil treatment (i.e., deep zone, shallow zone, and background).…”

Section: Adsorption Determination Methodologymentioning

confidence: 99%

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Phosphorus adsorption characteristics of a constructed wetland soil receiving dairy farm wastewater

Jamieson¹,

Stratton²,

Madani³

2002

Can. J. Soil. Sci.

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. 2002. Phosphorus adsorption characteristics of a constructed wetland soil receiving dairy farm wastewater. Can. J. Soil Sci. 82: 97-104. Adsorption to soil has been identified as a key wastewater P removal mechanism in treatment wetlands. Batch incubation experiments were performed to measure the capacity of a constructed dairy farm wetland in Pictou County, Nova Scotia, to remove P from solution. The constructed wetland had been receiving wastewater since 1996. Non-linear regression analysis was performed using the Langmuir adsorption model to describe the P adsorption characteristics for the wetland soil under study. The Langmuir model was adequate in describing the P adsorption characteristics of the system studied. The P adsorption maxima found were approximately 925, 924, and 1600 mg P kg -1 soil, for the deep zone soil, shallow zone soil, and a background soil (not receiving wastewater), respectively. The P adsorption maxima for the deep zone and shallow zone soils were not significantly different (P > 0.05) from one another, but were significantly lower (P < 0.05) than the background soil. These data, together with information on wastewater inflow and P loading, were used to predict a lifespan of 8 yr for this wetland, relative to P removal.Key words: Phosphorus, wetlands, constructed, adsorption, Langmuir, saturation Jamieson, T. S., Stratton, G. W., Gordon, R. et Madani, A. 2002. Adsorption du phosphore par une terre humide artificielle recevant les eaux usées d'une exploitation laitière. Can. J. Soil Sci. 82: 97-104. Un des principaux moyens pour extraire le phosphore (P) des eaux usées dans le traitement des terres humides est l'adsorption par le sol. Les auteurs ont recouru à l'incubation en lot pour jauger la capacité d'une terre humide artificielle à retirer le P dissous. La terre humide en question accueille les eaux usées d'une exploitation laitière du comté de Pictou, en Nouvelle-Écosse, depuis 1996. On a appliqué l'analyse par régression non linéaire au modèle d'adsorption de Langmuir pour préciser les propriétés du sol à l'étude. Le modèle de Langmuir décrit bien le mécanisme d'adsorption du système examiné. La quantité maximale de P adsorbée s'établit respectivement autour de 925, de 924 et de 1 600 mg par kg de sol pour la couche profonde, la couche superficielle et le sol témoin (ne recevant pas les eaux usées). La quantité maximale de P adsorbée ne diffère pas sensiblement (P > 0,05) entre la couche profonde et la couche superficielle, mais elle varie sensiblement de celle relevée dans le sol témoin (P < 0,05). Selon ces résultats et d'après les données sur l'apport d'eaux usées et la charge de P, les chercheurs estiment que la terre humide à l'étude parviendra à saturation au bout de huit ans.

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Section: Adsorption Determination Methodologymentioning

confidence: 99%

“…Batch incubation experiments were performed to measure the capacity of the wetland soil to remove P from solution, similar to Olsen and Watanabe (1957), Gale et al (1994), and Reddy et al (1998).…”

Section: Site Descriptionmentioning

confidence: 99%

Phosphorus adsorption characteristics of a constructed wetland soil receiving dairy farm wastewater

Jamieson¹,

Stratton²,

Madani³

2002

Can. J. Soil. Sci.

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“…Human activities increased external loads, which have accelerated the eutrophication process and triggered internal nutrient loading processes (Reddy et al 1998). As a result, internal loading can delay (Gudimov et al 2012) recovery of water quality even after the external nutrient load has decreased.…”

Section: Comparison With Other Regionsmentioning

confidence: 99%

Estimating internal P loading in a deep water reservoir of northern China using three different methods

Qin

Zeng

Zhang

et al. 2016

Environ Sci Pollut Res

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Much attention had been paid to reducing external loading of nutrients to improve water quality, while internal loading from sediment, which has been largely neglected, is also an important source for water eutrophication. The internal load in deep lakes or reservoirs is not easy to be detected and be quantified. In this study, three different methods (mass balance method, Fick's law, and regression equation) were combined to calculate the gross or/and net P release from sediment using limited data. Our results indicated that (1) ); (2) Hot periods of sediment releasing were suggested to occur from March to April and from August to September, which correspond to periods of high risks of algae blooms. The remaining months of the year were shown as net nutrient retention; (3) for the whole region, Baihedam and Chaohekuqu were identified as zones with a higher possibility to release P from sediment. (4) P loading to the Miyun Reservoir was greater in the inflow than in the outflow, suggesting a portion of the inflow P load was retained in the water or sediment; hence, release of sediment P may continue to be a major source of phosphorus in the future.

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“…The EPC increases when sediments become anoxic (Reddy et al 1998;Pant and Reddy 2001). House and Denison (2000) found that the EPC of river sediments increased with decreasing redox potential.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus source—sink relationships of stream sediments in the Rathbun Lake watershed in southern Iowa, USA

Hongthanat

Kovar

Thompson

et al. 2016

Environ Monit Assess

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The surface waters of Rathbun Lake watershed in southern Iowa are impacted by agricultural sources of sediments and nutrients, including phosphorus (P). Because stream sediments often play an important role in regulating P concentrations in stream water, we investigated sediment-water column P relationships in four creeks within the watershed and then evaluated the relationship between sediment properties and indicators of the risk of P loss. Based on Mehlich-3-extractable P (17 to 68 mg kg -1) and degree of P saturation (2 to 12 %), stream bank and bed sediments at the four sites were unlikely to serve as major sources of P. However, equilibrium P concentrations, which ranged from 0.02 to 0.12 mg L-1, indicated that bed sediments could release P to the water column depending on dissolved P (DP) concentrations in the stream water and the time of year. The likelihood of P desorption from the sediments increased with increasing pH (r=0.92, p < 0.01) and sand content (r = 0.78, p < 0.05), but decreased with clay content (r = −0.72, p < 0.05) and iron (Fe) (r = −0.93, p < 0.001) associated with organic matter. From these results, we speculate that changes in land use within the riparian areas may, at least initially, have little effect on P concentrations in the streams. Low concentrations of DP relative to total P (TP) in these streams, however, suggest that P loads to Rathbun Lake can be reduced if P inputs from eroded bank sediments are controlled. KeywordsStream sediments, Riparian pastures, Phosphorus losses, Degree of P saturation, equilibrium P concentration Abstract The surface waters of Rathbun Lake watershed in southern Iowa are impacted by agricultural sources of sediments and nutrients, including phosphorus (P). Because stream sediments often play an important role in regulating P concentrations in stream water, we investigated sediment-water column P relationships in four creeks within the watershed and then evaluated the relationship between sediment properties and indicators of the risk of P loss. Based on Mehlich-3-extractable P (17 to 68 mg kg −1) and degree of P saturation (2 to 12 %), stream bank and bed sediments at the four sites were unlikely to serve as major sources of P. However, equilibrium P concentrations, which ranged from 0.02 to 0.12 mg L −1 , indicated that bed sediments could release P to the water column depending on dissolved P (DP) concentrations in the stream water and the time of year. The likelihood of P desorption from the sediments increased with increasing pH (r = 0.92, p < 0.01) and sand content (r = 0.78, p < 0.05), but decreased with clay content (r = −0.72, p < 0.05) and iron (Fe) (r = −0.93, p < 0.001) associated with organic matter. From these results, we speculate that changes in land use within the riparian areas may, at least initially, have little effect on P concentrations in the streams. Low concentrations of DP relative to total P (TP) in these streams, however, suggest that P loads to Rathbun Lake can be reduced if P inputs from eroded bank sediments ar...

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Phosphorus Sorption Capacities of Wetland Soils and Stream Sediments Impacted by Dairy Effluent

Cited by 144 publications

References 0 publications

Phosphorus adsorption characteristics of a constructed wetland soil receiving dairy farm wastewater

Phosphorus adsorption characteristics of a constructed wetland soil receiving dairy farm wastewater

Estimating internal P loading in a deep water reservoir of northern China using three different methods

Phosphorus source—sink relationships of stream sediments in the Rathbun Lake watershed in southern Iowa, USA

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