Physicochemical assessment and phosphorus storage of canal sediments within the Everglades Agricultural Area, Florida

Das, Jaya; Daroub, Samira H.; Bhadha, Jehangir H.; Lang, Tim; Díaz, Oscar; Harris, Willie G.

doi:10.1007/s11368-012-0508-y

Cited by 15 publications

(5 citation statements)

References 37 publications

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“…Phosphorus recovered in the modified Hedley (1982) P fractionation was lower in Ca/ Mg P and higher in residual P compared to previous studies on soils and canal sediments in this region [21,26]. Ditch sediments are generally shallower and likely contain more consolidated limestone compared to canal sediment because canals are dug to a deeper depth disturbing the underlying limerock [21]. Past studies have found organic sediments to have low ability to remove P from the water column [35,36].…”

Section: Discussionmentioning

confidence: 71%

“…Although the correlation (p = 0.15) was not significant, the negative correlation may indicate that much of the P present is in the inorganic rather than organic form. In this region, sediments have been found to contain a large fraction of P in the inorganic Ca/Mg P form due to the presence of limerock [21,34]. Phosphorus recovered in the modified Hedley (1982) P fractionation was lower in Ca/ Mg P and higher in residual P compared to previous studies on soils and canal sediments in this region [21,26].…”

Section: Discussionmentioning

confidence: 75%

“…In this region, sediments have been found to contain a large fraction of P in the inorganic Ca/Mg P form due to the presence of limerock [21,34]. Phosphorus recovered in the modified Hedley (1982) P fractionation was lower in Ca/ Mg P and higher in residual P compared to previous studies on soils and canal sediments in this region [21,26]. Ditch sediments are generally shallower and likely contain more consolidated limestone compared to canal sediment because canals are dug to a deeper depth disturbing the underlying limerock [21].…”

Section: Discussionmentioning

confidence: 99%

“…In EAA sediments, the P cycle is influenced by various factors other than particle size, such as organic matter content, pH, and redox potential. Hydrous iron (Fe) and aluminum (Al) oxyhydroxide (FeO(OH), AlO(OH)) and calcium carbonate (CaCO 3 ) content are expected to have important roles in regulating P sorption [21,22]. Phosphorus fractionation procedures have been developed to measure bioavailability of P and the distribution of P in different chemical fractions.…”

Section: Introductionmentioning

confidence: 99%

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Influence of flow on phosphorus-dynamics and particle size in agricultural drainage ditch sediments

et al. 2020

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Particle size is one factor affecting phosphorus (P) dynamics in soils and sediments. This study investigated how flow facilitated by hydraulic pumps and aquatic vegetation species water lettuce (Pistia stratiotes) and water hyacinth (Eichhornia crassipes) affected particle size and P-dynamics in organic sediments in agricultural drainage ditches. Sediments with finer particle size (>0.002 mm) were hypothesized to contain greater total P (TP) and less labile P than sediments with coarser particle size. Particle size was determined using a LS 13 320 Laser Diffraction Particle Size Analyzer. Sediments were tested for pH, TP, and organic matter. Fractions of P were determined using a sequential fractionation experiment and 31 P Nuclear Magnetic Resonance (NMR) Spectroscopy. Larger average particle size and lower average total P concentrations were found in the inflows of the field ditches compared to the outflows. Presence of flow and aquatic vegetation did not have a significant impact on particle size, TP, or labile P fractions. Median (p = 0.10) particle size was not significantly correlated to TP. Overall, there was an average trend of coarser particle size and lower P concentrations in the inflow compared to the outflow. The presence of inorganic limerock could have affected results due to increased P adsorption capacity and larger average particle size compared to the organic fraction of the sediment.

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Section: Discussionmentioning

confidence: 71%

Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of flow on phosphorus-dynamics and particle size in agricultural drainage ditch sediments

et al. 2020

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“…Upon senescence, the vegetation becomes a dominant pathway by which P o is mineralized (Walton et al., 2020). However, decaying vegetation in the ditch's waterlogged conditions does not have easy access to oxygen (Supplemental Table S1), which, along with soil type, pH, and temperature conditions near the sediment–water interface, controls P retention capacity and release (Das et al., 2012a; Pettersson, 1998). This allows for enhanced accumulation of organic matter within the ditch, limiting the release of P into the water column (Craft, 2016).…”

Section: Discussionmentioning

confidence: 99%

Phosphorus retention within a relic agricultural ditch in a constructed wetland

et al. 2021

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Stormwater treatment areas (STAs) are constructed wetlands established to capture phosphorus (P) from agricultural runoff before reaching the Florida Everglades. Retained P is primarily stored in wetland soils and sediments generated through a collection of interrelated physical, chemical, and biological processes. The amount of P and other elements (Al, Ca, Cu, Fe, Mg, Mn, Pb, and Zn) retained in the flocculent (floc) and recently accreted soil (RAS) horizons from a relic agricultural ditch within Cell 4S of STA‐1E were compared with the surrounding marsh soils (upstream and downstream sites of the ditch). The amount of P retained in the ditch was significantly greater than the surrounding marsh soils and for all the elements in the floc horizon and five of the nine elements in the RAS horizon, suggesting that different processes or process rates influenced accumulation. Phosphorus species in the floc and RAS sediment horizons were identified and quantified using 31P nuclear magnetic resonance (NMR) spectroscopy and total P determined by microwave plasma–optical emission spectroscopy. In general, P forms were dominated by orthophosphate, sugar phosphates, nucleotides, DNA, and pyrophosphate, with varying relative abundances of species. Total P concentration significantly decreased from upstream to downstream of the ditch by an average of 28 and 35% for floc and RAS soils, respectively. The relatively high P accrual rate within the ditch suggested that relic ditches perpendicular to flow could reduce P transport to downstream soils and sediments and, in turn, help maintain low P levels in overlying water.

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Phosphorus Release and Equilibrium Dynamics of Canal Sediments within the Everglades Agricultural Area, Florida

Das

Daroub

Bhadha

et al. 2012

Water Air Soil Pollut

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Physicochemical assessment and phosphorus storage of canal sediments within the Everglades Agricultural Area, Florida

Cited by 15 publications

References 37 publications

Influence of flow on phosphorus-dynamics and particle size in agricultural drainage ditch sediments

Influence of flow on phosphorus-dynamics and particle size in agricultural drainage ditch sediments

Phosphorus retention within a relic agricultural ditch in a constructed wetland

Phosphorus Release and Equilibrium Dynamics of Canal Sediments within the Everglades Agricultural Area, Florida

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