Phosphate sorption by three potential filter materials as assessed by isothermal titration calorimetry

Lyngsie, Gry; Penn, Chad J.; Hansen, Holger Bernt; Borggaard, Ole K.

doi:10.1016/j.jenvman.2014.04.010

Cited by 25 publications

(24 citation statements)

References 37 publications

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“…Steady state P removal observed in this study (Fig. 1a) was also observed in a sorption batch experiment where CFH was titrated with a 10 mM Pi solution (Lyngsie et al, 2014b) and by Chardon et al (2012) who conducted a Pi leaching column study with Fe-oxide coated sand mixed in different amounts. The steady state P removal observed for CFH and other Fe-oxides may be explained by the fast and strong sorption onto readily available (external) outer surface sites, which occur at a greater rate than the Pi migration into interior sorption sites.…”

Section: Phosphate Desorption By Filtralite1psupporting

confidence: 79%

“…The pH further decreased during the 2 h desorption experiment by 0.6 units or less. Lyngsie et al (2014b) found that Pi retention by Filtralite J P is very pH dependent as also found by Herrmann et al (2013) and Karabelnik et al (2012). Thus, when pH decreased below 8.2, Filtralite 1 P nearly ceased to sorb Pi and even began to desorb indigenous Pi (Lyngsie et al, 2014b).…”

Section: Phosphate Desorption By Filtralite1pmentioning

confidence: 55%

“…Lyngsie et al (2014b) found that Pi retention by Filtralite J P is very pH dependent as also found by Herrmann et al (2013) and Karabelnik et al (2012). Thus, when pH decreased below 8.2, Filtralite 1 P nearly ceased to sorb Pi and even began to desorb indigenous Pi (Lyngsie et al, 2014b). However, none of the samples in the current study decreased to a pH below the critical value of 8.2 in the desorption experiment, which indicates that the desorption was also driven by the Pi concentration gradient (Tables S2-S4).…”

Section: Phosphate Desorption By Filtralite1pmentioning

confidence: 99%

See 2 more Smart Citations

Modelling of phosphate retention by Ca- and Fe-rich filter materials under flow-through conditions

Lyngsie

Penn

Pedersen

et al. 2015

Ecological Engineering

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Section: Phosphate Desorption By Filtralite1psupporting

confidence: 79%

Section: Phosphate Desorption By Filtralite1pmentioning

confidence: 55%

Section: Phosphate Desorption By Filtralite1pmentioning

confidence: 99%

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Modelling of phosphate retention by Ca- and Fe-rich filter materials under flow-through conditions

Lyngsie

Penn

Pedersen

et al. 2015

Ecological Engineering

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“…Several studies have highlighted and reviewed many different PSMs [27][28][29][30][31][32][33][34][35]. In general, PSMs can be reduced to two main categories based on P sorption mechanism: iron (Fe)/aluminum (Al) based PSMs that remove P by ligand exchange reactions, and calcium (Ca)/magnesium (Mg) based PSMs that work by precipitating Ca and Mg phosphate minerals.…”

mentioning

confidence: 99%

A Review of Phosphorus Removal Structures: How to Assess and Compare Their Performance

Penn

Chagas

Klimeski

et al. 2017

Water

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Controlling dissolved phosphorus (P) losses to surface waters is challenging as most conservation practices are only effective at preventing particulate P losses. As a result, P removal structures were developed to filter dissolved P from drainage water before reaching a water body. While many P removal structures with different P sorption materials (PSMs) have been constructed over the past two decades, there remains a need to evaluate their performances and compare on a normalized basis. The purpose of this review was to compile performance data of pilot and field-scale P removal structures and present techniques for normalization and comparison. Over 40 studies were normalized by expressing cumulative P removal as a function of cumulative P loading to the contained PSM. Results were further analyzed as a function of retention time (RT), inflow P concentration, and type of PSM. Structures treating wastewater were generally more efficient than non-point drainage water due to higher RT and inflow P concentrations. For Ca-rich PSMs, including slag, increased RT allowed for greater P removal. Among structures with low RT and inflow P concentrations common to non-point drainage, Fe-based materials had an overall higher cumulative removal efficiency compared to non-slag and slag materials.

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“…The result strongly suggests that the phosphorus removal in the columns occur by chemical adsorption or precipitation processes in the red ferralitic soil, forming strong Fe-P bonds. Lyngsie et al (2014) also obtained the formation of strong Fe-P bonds with Fe oxide-based CFH-12 substrate. Table 8 show the phosphorus extracted in each fraction.…”

Section: Sequential Extractionmentioning

confidence: 90%

Phosphorus retention capacity in red ferralitic soil

Pérez

Bossens

Rosa

2014

Water Science and Technology

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In this study the main physical-chemical characteristics in the red ferralitic soil to use as substrate in subsurface wetlands was determined. The P-removal was evaluated in a short-term isotherm batch experiment and in a column percolation experiment. The acid characteristic and high content of iron minerals in the red ferralitic soil facilitated the phosphorus removal. Also the sorption isotherms at two different temperatures were obtained. The results showed that the sorption capacity increases with an increase in solution temperature from 25°C to 35°C. The experimental data was fitted to Langmuir and Freundlich models, having a better fit to the Freundlich isotherms. The maximum P-sorption capacities estimated using the Langmuir-isotherm were 0.96 -1.13 g/kg at 25 and 35 °C respectively. Moreover a column experiment was carried out at two different flows. Sequential extractions of the phosphorus saturated soil indicated that phosphorus is mainly bound with iron or aluminium minerals. The results have demonstrated a good potentiality for red ferralitic soil for phosphorus removal from urban wastewater.

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Phosphate sorption by three potential filter materials as assessed by isothermal titration calorimetry

Cited by 25 publications

References 37 publications

Modelling of phosphate retention by Ca- and Fe-rich filter materials under flow-through conditions

Modelling of phosphate retention by Ca- and Fe-rich filter materials under flow-through conditions

A Review of Phosphorus Removal Structures: How to Assess and Compare Their Performance

Phosphorus retention capacity in red ferralitic soil

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