XANES Speciation of P in Environmental Samples: An Assessment of Filter Media for on-Site Wastewater Treatment

Eveborn, David; Gustafsson, Jon Petter; Hesterberg, Dean; Hillier, S. J.

doi:10.1021/es901084z

Cited by 59 publications

(57 citation statements)

References 31 publications

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“…3). These spectral features agreed well with those reported in literature [16,37]. In all spectra, a peak was found at around 2168.0 eV, which corresponds to oxygen oscillation and is a characteristic feature for Ca-P minerals [16,17].…”

Section: Xanes Analysissupporting

confidence: 91%

Surface controlled calcium phosphate formation on three-dimensional bacterial cellulose-based nanofibers

Luo¹,

Xiong²,

Zhang³

et al. 2015

Materials Science and Engineering: C

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Section: Xanes Analysissupporting

confidence: 91%

Surface controlled calcium phosphate formation on three-dimensional bacterial cellulose-based nanofibers

Luo¹,

Xiong²,

Zhang³

et al. 2015

Materials Science and Engineering: C

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“…at 2164.1 eV). For ACP this peak was only very weak, in agreement with Eveborn et al (2009) andOxmann (2014). Generally, phosphate bound to iron (III) and aluminium (hydr)oxides has strong white lines.…”

Section: Xanes Analysissupporting

confidence: 71%

“…These observations agree with those of Gustafsson et al (2008) for another group of used filter media. The presence of ACP in such materials has been confirmed in XANES studies (Eveborn et al 2009), but due to the similar XANES spectra of OCP and HAP, this technique could not be used to differentiate between the two. • cAOD-PEG * cAOD…”

Section: Visual Minteq and Xanes Analysismentioning

confidence: 99%

Phosphorus removal performance and speciation in virgin and modified argon oxygen decarburisation slag designed for wastewater treatment

et al. 2015

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Argon oxygen decarburisation (AOD) slag may be used for phosphorus (P) removal, as its high pH and weatherable calcium (Ca) minerals provide sufficient Ca 2+ and OH -for calcium phosphate (Ca-PO 4 ) precipitation.This study examined the P removal performance of AOD slag for use as wastewater treatment material. Batch experiments were carried out using both synthetic P solution and real wastewater, followed by chemical modelling and X-ray absorption near edge structure (XANES) spectroscopy. The influences of initial P concentration, slag dose and modification by polyethylene glycol (PEG), an effective agent for generation of 2 porous materials, were investigated to determine the optimal conditions for P removal by AOD slag. It was found that virgin AOD slag removed 94.8% of P from a synthetic P solution in 4 hours and 97.8% in 10 hours.This high P removal was accompanied by a rapid increase in pH from 7.0 to 10.74. The maximum P removal capacity (PRC) from synthetic P solution ranged from 1.3 to 27.5 mg P g -1 . The optimal AOD dose for P removal from wastewater, determined in 8-hour batch experiments, was 25 g L -1. PEG modification increased the reaction rate and resulted in higher final pH, increasing PRC by 47.9%. Combined Visual MINTEQ and XANES analysis for detailed examination of P removal mechanisms revealed that the main P removal mechanism was precipitation of calcium phosphate. According to the XANES analysis, the main Ca-PO 4 precipitate formed on virgin AOD slag under low initial P concentration and high pH was apatite, while brushite was the dominant product at high initial P concentration and low pH.

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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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XANES Speciation of P in Environmental Samples: An Assessment of Filter Media for on-Site Wastewater Treatment

Cited by 59 publications

References 31 publications

Surface controlled calcium phosphate formation on three-dimensional bacterial cellulose-based nanofibers

Surface controlled calcium phosphate formation on three-dimensional bacterial cellulose-based nanofibers

Phosphorus removal performance and speciation in virgin and modified argon oxygen decarburisation slag designed for wastewater treatment

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

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