Delivery and cycling of phosphorus in rivers: A review

Withers, P. J. A.; Jarvie, Helen P.

doi:10.1016/j.scitotenv.2008.08.002

Cited by 644 publications

(489 citation statements)

References 174 publications

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“…4). Comprehensively, the P. crispus leaves can enlarge the bonding area for the settled organism (Withers and Jarvie 2008) and provide biomembrane or suspending particles as nucleation sites for precipitation Song et al 2006), supporting a prerequisite for CaCO 3 -P coprecipitation on the leaf surface of P. crispus. As shown in Scheme 1, CaCO 3 -P coprecipitation was proposed.…”

Section: Characterization Of Caco 3 -P Coprecipitationmentioning

confidence: 84%

“…The unbalanced biogeochemical cycle of phosphorus in water is a critical reason for eutrophication (Conley et al 2009;Zaaboub et al 2014), while phosphorus migration is closely related to its biological/abiological reactions, i.e., absorption/transfer, sorption/desorption, precipitation/dissolution, oxidation/reduction, and convection/diffusion (Withers and Jarvie 2008;Salerno et al 2014;Baken et al 2015). In general, submerged macrophytes can remove many nutrients from fresh water (Srivastava et al 2008;Dierberg et al 2002) and CaCO 3 -P coprecipitation is reported to play an important role in dephosphorization by submerged macrophytes (Kufel et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Liu

Guo

Yuan

et al. 2016

Environ Sci Pollut Res

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In this paper, the characterization of CaCO 3 -P coprecipitation on the leaf surface of Potamogeton crispus at various temperatures in pot experiments was investigated. White precipitates occurred on the leaf surfaces during the P. crispus growth period, and the chemical analysis demonstrates that the white precipitates contain Ca and P. The primary constituent of the white precipitates on the leaf of P. crispus was octacalcium phosphate (OCP) and hydroxyapatite. XRD characterization showed that the precipitates mostly consisted of crystals formed by calcium carbonate and hydroxyapatite, and the high calcium/phosphorus ratio indicated that the white coprecipitates were CaCO 3 -P. The scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDX) results confirmed that the precipitates on the surface of P. crispus leaves were carbonate-containing hydroxylapatite. In addition, no significant differences was observed in the structure of CaCO 3 -P coprecipitation between room temperature and consistent temperature treatments, which means that a little change in the temperature cannot change the process of Ca-P coprecipitation. Finally, coprecipitation of CaCO 3 -P on the leaf surface of P. crispus was proposed based on the morphology and structure analysis of CaCO 3 -P coprecipitation.

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Section: Characterization Of Caco 3 -P Coprecipitationmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Liu

Guo

Yuan

et al. 2016

Environ Sci Pollut Res

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“…The effect of climate change and land-use change on phosphorus loads in rivers has already been analysed in literature (Withers and Jarvie, 2008). Specifically, for the River Thames it was found that an increase in the agricultural fraction of the catchment and runoff is likely to trigger an increase in phosphorus due to diffuse sources Whitehead et al, 2013).…”

Section: Impacts On Phosphorus Concentrationmentioning

confidence: 99%

Impacts of climate change, land-use change and phosphorus reduction on phytoplankton in the River Thames (UK)

Bussi

Whitehead

Bowes

et al. 2016

Science of The Total Environment

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Article (refereed) -postprintBussi, Gianbattista; Whitehead, Paul G.; Bowes, Michael J.; Read, Daniel S.; Prudhomme, Christel; Dadson, Simon J. 2016. Impacts of climate change, land-use change and phosphorus reduction on phytoplankton in the River Thames (UK).Contact CEH NORA team at noraceh@ceh.ac.ukThe NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. AbstractPotential increases of phytoplankton concentrations in river systems due to global warming and changing climate could pose a serious threat to the anthropogenic use of surface waters. Nevertheless, the extent of the effect of climatic alterations on phytoplankton concentrations in river systems has not yet been analysed in detail. In this study, we assess the impact of a change in precipitation and temperature on river phytoplankton concentration by means of a physically-based model. A scenarioneutral methodology has been employed to evaluate the effects of climate alterations on flow, phosphorus concentration and phytoplankton concentration of the River Thames (southern England).In particular, five groups of phytoplankton are considered, representing a range of size classes and pigment phenotypes, under three different land-use/land-management scenarios to assess their impact on phytoplankton population levels. The model results are evaluated within the framework of future climate projections, using the UK Climate Projections 09 (UKCP09) for the 2030s. The results of the model demonstrate that an increase in average phytoplankton concentration due to climate change is highly likely to occur, with the magnitude varying depending on the location along the River Thames. Cyanobacteria show significant increases under future climate change and land use change. An expansion of intensive agriculture accentuates the growth in phytoplankton, especially in the upper reaches of the River Thames. However, an optimal phosphorus removal mitigation strategy, which combines reduction of fertiliser application and phosphorus removal from wastewater, can help to reduce this increase in phytoplankton concentration, and in some cases, compensate for the effect of rising temperature.

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“…'Within-river retention' encompasses a wide range of physical and biogeochemical processes which retain both point and non-point sources of P during downstream transport 19 . In this study, we focus on within-river storage and subsequent physical (flow-dependent) remobilization of P derived from wastewater treatment plant (WWTP) effluent.…”

Section: Introductionmentioning

confidence: 99%

Within-River Phosphorus Retention: Accounting for a Missing Piece in the Watershed Phosphorus Puzzle

Jarvie

Sharpley

Scott

et al. 2012

Environ. Sci. Technol.

100

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The NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. ABSTRACTThe prevailing 'puzzle' in watershed phosphorus (P) management is how to account for the nonconservative behavior (retention and remobilization) of P along the land-freshwater continuum. This often hinders our attempts to directly link watershed P sources with their water quality impacts. Here, we examine aspects of within-river retention of wastewater effluent P and its remobilization under high flows. Most source apportionment methods attribute P loads mobilized under high flows (including retained and remobilized effluent P) as non-point agricultural sources. We present a new simple empirical method which uses chloride as a conservative tracer of wastewater effluent, to quantify within-river retention of effluent P, and its contribution to river P loads, when remobilized under high flows. We demonstrate that within-river P retention can effectively mask the presence of effluent P inputs in the water quality record. Moreover, we highlight that by not accounting for the contributions of retained and remobilized effluent P to river storm-flow P loads, existing source apportionment methods may significantly over-estimate the non-point agricultural sources and under-estimate wastewater sources in mixed land-use watersheds. This has important implications for developing 2 effective watershed remediation strategies, where remediation needs to be equitably and accurately apportioned among point and non-point P contributors.

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Delivery and cycling of phosphorus in rivers: A review

Cited by 644 publications

References 174 publications

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Occurrence and characterization of CaCO3-P coprecipitation on the leaf surface of Potamogeton crispus in water

Impacts of climate change, land-use change and phosphorus reduction on phytoplankton in the River Thames (UK)

Within-River Phosphorus Retention: Accounting for a Missing Piece in the Watershed Phosphorus Puzzle

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