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Rydin, Emil
Publications (10 of 30) Show all publications
Schutz, J., Rydin, E. & Huser, B. J. (2017). A newly developed injection method for aluminum treatment in eutrophic lakes:: Effects on water quality and phosphorus binding efficiency. Lake and reservoir management, 33(2), 152-162
Open this publication in new window or tab >>A newly developed injection method for aluminum treatment in eutrophic lakes:: Effects on water quality and phosphorus binding efficiency
2017 (English)In: Lake and reservoir management, ISSN 1040-2381, E-ISSN 2151-5530, Vol. 33, no 2, p. 152-162Article in journal (Refereed) Published
Abstract [en]

Application of aluminum (Al) salts has been used to reduce phosphorus (P) concentrations in lakes since the 1960s. Al is typically applied to the water column where Al-hydroxides form, settle to the sediment surface, and bind P in sediment. Al can be transported to other, non-target areas of the lake, however, potentially limiting treatment effectiveness. To alleviate this problem, a new method has been developed in which the Al salt is injected directly into the sediment as a liquid. In this study, the binding efficiency and application costs were calculated for 2 lakes in Sweden that received injection applications of polyaluminum chloride (PAC). Binding efficiency was similar to previous water column applications, implying there is little difference between the 2 application methods. Other factors, however, such as dissolved organic matter and type of Al salt used (PAC vs. Al sulfate), can also affect binding efficiency. Thus, Al injection may have improved the amount of P bound per unit Al in the study lakes given the in-lake conditions and Al salt used. Treatment cost (cost per kilogram of P bound to Al) for the injection method compared to previous water column treatments was somewhat higher due to increased costs for buffered PAC and time needed for application. Both mobile sediment P and internal loading remained reduced compared to pre-treatment conditions, showing that the Al injection treatments continued to control sediment P release. More study is needed, however, to determine the relative effectiveness of this method in different types of lakes.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS INC, 2017
Keywords
Aluminum, eutrophication, phosphorous, restoration, sediment
National Category
Environmental Sciences
Identifiers
urn:nbn:se:uu:diva-328285 (URN)10.1080/10402381.2017.1318418 (DOI)000403102200006 ()
Available from: 2017-09-07 Created: 2017-09-07 Last updated: 2017-09-07Bibliographically approved
Huser, B. J., Egemose, S., Harper, H., Hupfer, M., Jensen, H., Pilgrim, K. M., . . . Futter, M. (2016). Longevity and effectiveness of aluminum addition to reduce sediment phosphorus release and restore lake water quality. Water Research, 97, 122-132
Open this publication in new window or tab >>Longevity and effectiveness of aluminum addition to reduce sediment phosphorus release and restore lake water quality
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2016 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 97, p. 122-132Article in journal (Refereed) Published
Abstract [en]

114 lakes treated with aluminum (Al) salts to reduce internal phosphorus (P) loading were analyzed to identify factors driving longevity of post-treatment water quality improvements. Lakes varied greatly in morphology, applied Al dose, and other factors that may have affected overall treatment effectiveness. Treatment longevity based on declines in epilimnetic total P (TP) concentration averaged 11 years for all lakes (range of 0-45 years). When longevity estimates were used for lakes with improved conditions through the end of measurements, average longevity increased to 15 years. Significant differences in treatment longevity between deeper, stratified lakes (mean 21 years) and shallow, polymictic lakes (mean 5.7 years) were detected, indicating factors related to lake morphology are important for treatment success. A decision tree developed using a partition model suggested Al dose, Osgood index (01, a morphological index), and watershed to lake area ratio (related to hydraulic residence time, WA:LA) were the most important variables determining treatment longevity. Multiple linear regression showed that Al dose, WA:LA, and 01 explained 47, 32 and 3% respectively of the variation in treatment longevity. Other variables (too data limited to include in the analysis) also appeared to be of importance, including sediment P content to Al dose ratios and the presence of benthic feeding fish in shallow, polymictic lakes.

Keywords
Aluminum, Water management, Nutrients, Trophic status, Alum
National Category
Ecology
Identifiers
urn:nbn:se:uu:diva-298839 (URN)10.1016/j.watres.2015.06.051 (DOI)000376786100013 ()26250754 (PubMedID)
Funder
Swedish Research Council Formas, 2012-1413
Available from: 2016-07-11 Created: 2016-07-11 Last updated: 2017-11-28Bibliographically approved
Paraskova, J. V., Jorgensen, C., Reitzel, K., Pettersson, J., Rydin, E. & Sjöberg, P. J. R. (2015). Speciation of Inositol Phosphates in Lake Sediments by Ion-Exchange Chromatography Coupled with Mass Spectrometry, Inductively Coupled Plasma Atomic Emission Spectroscopy, and P-31 NMR Spectroscopy. Analytical Chemistry, 87(5), 2672-2677
Open this publication in new window or tab >>Speciation of Inositol Phosphates in Lake Sediments by Ion-Exchange Chromatography Coupled with Mass Spectrometry, Inductively Coupled Plasma Atomic Emission Spectroscopy, and P-31 NMR Spectroscopy
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2015 (English)In: Analytical Chemistry, ISSN 0003-2700, E-ISSN 1520-6882, Vol. 87, no 5, p. 2672-2677Article in journal (Refereed) Published
Abstract [en]

A method for the detection and speciation of inositol phosphates (InsP(n)) in sediment samples was tested, utilizing oxalateoxalic acid extraction followed by determination by high-performance liquid chromatography coupled with tandem mass spectrometry (HPLCMS/MS) using electrospray ionization (ESI) in negative mode. The chromatographic separation was carried out using water and ammonium bicarbonate as mobile phase in gradient mode. Data acquisition under MS/MS was attained by multiple reaction monitoring. The technique provided a sensitive and selective detection of InsP(n) in sediment samples. Several forms of InsPn in the oxalateoxalic acid extracted sediment were identified. InsP(6) was the dominating form constituting 0.250 mg P/g DW (dry weight); InsP(5) and InsP(4) constituted 0.045 and 0.014 mg P/g DW, respectively. The detection limit of the LCESI-MS/MS method was 0.03 mu M InsPn, which is superior to the currently used method for the identification of InsPn, P-31 nuclear magnetic resonance spectroscopy (P-31 NMR). Additionally sample handling time was significantly reduced.

National Category
Analytical Chemistry
Identifiers
urn:nbn:se:uu:diva-251433 (URN)10.1021/ac5033484 (DOI)000350611700025 ()25649303 (PubMedID)
Available from: 2015-04-23 Created: 2015-04-17 Last updated: 2017-12-04Bibliographically approved
Karlsson, O. M., Malmaeus, J. M., Viktori, T., Andersson, M. G. & Rydin, E. (2014). A revised semi-empirical mass balance model for phosphorus in Baltic coastal areas. Fundamental and Applied Limnology, 185(3-4), 209-221
Open this publication in new window or tab >>A revised semi-empirical mass balance model for phosphorus in Baltic coastal areas
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2014 (English)In: Fundamental and Applied Limnology, ISSN 1863-9135, Vol. 185, no 3-4, p. 209-221Article in journal (Refereed) Published
Abstract [en]

A decade of research on the phosphorus dynamics in Baltic Sea coastal areas using a combination of mathematical modelling, sediment surveys and time series of water quality data from monitoring programs has led to an improved understanding of processes controlling phosphorus turnover and coastal primary production. This paper presents a revised model for phosphorus turnover in non-tidal enclosed Baltic coastal areas. Using a new dataset from 500 sediment sampling stations it was possible to quantify and develop new simplified algorithms for sedimentary processes i.e. burial and erosion that did not decrease the model's predictive power. Our results indicate that erosion of old clays can be an important primary source to phosphorus water concentrations in enclosed coastal areas. A simple laboratory experiment using Common Duckweed (Lemna minor) supports to some extent that phosphorus originating from old clays is partly bioavailable and hence may influence the trophic state in the studied areas.

Keywords
Eutrophication, Coastal waters, Sediments, Ecosystem modelling, Phosphorus, Land uplift, Baltic Sea
National Category
Biological Sciences
Identifiers
urn:nbn:se:uu:diva-243053 (URN)10.1127/fal/2014/0613 (DOI)000346888400001 ()
Available from: 2015-02-11 Created: 2015-02-04 Last updated: 2017-12-04Bibliographically approved
Puttonen, I., Mattila, J., Jonsson, P., Karlsson, O. M., Kohonen, T., Kotilainen, A., . . . Rydin, E. (2014). Distribution and estimated release of sediment phosphorus in the northern Baltic Sea archipelagos. Estuarine, Coastal and Shelf Science, 145, 9-21
Open this publication in new window or tab >>Distribution and estimated release of sediment phosphorus in the northern Baltic Sea archipelagos
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2014 (English)In: Estuarine, Coastal and Shelf Science, ISSN 0272-7714, E-ISSN 1096-0015, Vol. 145, p. 9-21Article in journal (Refereed) Published
Abstract [en]

Phosphorus contents in the sediments were determined in archipelago areas of the northern Baltic Sea (Svealand in Sweden and Aland, SW Finland and W Uusimaa in Finland) during 2008-2012. Spatial and vertical distribution of phosphorus was studied by analysing sediment samples from 345 stations of different seabed substrate types. A sequential extraction method was applied to evaluate the pool of the potentially mobile phosphorus, i.e., the amount of phosphorus that can be expected to be released from sediments to water with time, and possibly support primary production. In addition, vertical distribution of immobile phosphorus forms in the sediments was used as a tool to assess phosphorus burial. The uppermost 2 cm of sediments were calculated to contain 126,000 tonnes of phosphorus in the study area covering 19,200 km(2) of the seafloor. Subtracting the assumed average background content (i.e. that assumed to be buried) of this total phosphorus content gave an estimation of 31,000-37,000 tonnes of potentially mobile phosphorus at the sediment surface. Redox sensitive iron-bound phosphorus accounts for two thirds of this pool. Compared with the total phosphorus input from the catchment of the entire Baltic Sea 29,000 tonnes in 2009 it can be concluded that the store of phosphorus that can be released with time from the sediments is large, and that internal phosphorus recycling processes thus may play a key role in phosphorus fluxes in the coastal zone. Spreading of hypoxia in the future, as recent modelling and sediment proxy results suggest, is likely to severely deteriorate the water quality, particularly in the archipelago areas where the water exchange is slow. 

Keywords
biogeochemistry, coastal zone, eutrophication, phosphorus fractionation, sediments, water quality management, Baltic Sea
National Category
Biological Sciences
Identifiers
urn:nbn:se:uu:diva-229527 (URN)10.1016/j.ecss.2014.04.010 (DOI)000338409100002 ()
Available from: 2014-08-12 Created: 2014-08-11 Last updated: 2017-12-05Bibliographically approved
Rydin, E. (2014). Inactivated phosphorus by added aluminum in Baltic Sea sediment. Estuarine, Coastal and Shelf Science, 151, 181-185
Open this publication in new window or tab >>Inactivated phosphorus by added aluminum in Baltic Sea sediment
2014 (English)In: Estuarine, Coastal and Shelf Science, ISSN 0272-7714, E-ISSN 1096-0015, Vol. 151, p. 181-185Article in journal (Refereed) Published
Abstract [en]

Decreased phosphorus (P) retention in aquatic sediments during hypoxic periods results in increased P recycling to the water column. To revert to less productive conditions in the enclosed bays of the Baltic Sea archipelago, increased sediment P burial capacity is needed. Aluminum (Al) addition is considered to be a cost-effective lake restoration method, as it improves sediment P burial capacity. However, little is known about its ability to permanently bind P in brackish systems. In summer 2000, Al sulfate granules were added to a hypoxic bottom area in the Osthammar bay, Sweden. Sediment core samples from the area were collected 10 years later. A peak in Al and P was detected at 20 cm sediment depth, reflecting the added Al and P trapped to it. Only part of the added Al was recovered, but the recovered Al (8 g Al/m(2)) trapped P at a ratio of 5:1 (molar). Chemical fractionation showed that P extracted as "Al-P" constituted 55% of the trapped P, indicating that Al added also trapped P extracted as other P forms.

Keywords
Baltic Sea, eutrophication, sediment, phosphorus, aluminum
National Category
Oceanography, Hydrology and Water Resources
Identifiers
urn:nbn:se:uu:diva-245540 (URN)10.1016/j.ecss.2014.10.008 (DOI)000347768800019 ()
Available from: 2015-03-09 Created: 2015-02-26 Last updated: 2018-01-11Bibliographically approved
Paraskova, J. V., Sjöberg, P. J. .. & Rydin, E. (2014). Turnover of DNA-P and phospholipid-P in lake sediments. Biogeochemistry, 119(1-3), 361-370
Open this publication in new window or tab >>Turnover of DNA-P and phospholipid-P in lake sediments
2014 (English)In: Biogeochemistry, ISSN 0168-2563, E-ISSN 1573-515X, Vol. 119, no 1-3, p. 361-370Article in journal (Refereed) Published
Abstract [en]

Identifying and quantifying the forms of phosphorus (P) in lake sediments is a prerequisite for understanding lake trophic status and possible exports of P downstream. Organic P is one of the most important P forms found in the sediment, where orthophosphate diesters, including DNA and phospholipids, represent a degradable P pool that can support primary production and eutrophication. In this study, sediment cores from the eutrophic Lake Erken and the oligotrophic Lake Ånnsjön, both in steady state regarding long-term P input revealed trends in the degradation of DNA-P and PL-P with sediment depth. Comparisons were performed based on the differentiation of essentially permanent or recalcitrant P and temporary, potentially mobile P for the respective fractions. The temporary P pool was defined as the part of the total P pool calculated for values higher than the level at which the measured P concentration converged to a constant value and the recalcitrant pool was defined as the difference between the total and the temporary. The temporary diester-P pool comprised over 20 % of the total temporary P in Lake Erken and around 4 % in Lake Ånnsjön. The decrease in P concentrations with depth was more rapid for DNA-P compared to PL-P in both lakes, suggesting that DNA-P has a more prominent role in internal loading. The study shows that P mobilization potential can be different for different P fractions, which is important when assessing their contribution to internal loading of P within an aquatic system.

Keywords
Phosphorus turnover; Sediment; DNA; Phospholipids; Erken; Ånnsjön
National Category
Earth and Related Environmental Sciences Chemical Sciences
Identifiers
urn:nbn:se:uu:diva-224699 (URN)10.1007/s10533-014-9972-3 (DOI)000336028400023 ()
Available from: 2014-05-19 Created: 2014-05-19 Last updated: 2017-12-05Bibliographically approved
Paraskova, J. V., Sjöberg, P. J. .. & Rydin, E. (2013). Can phospholipids and nucleic acids shed light on organic phosphorus turnover in lake sediment?. In: Turner, Benjamin L. (Ed.), Organic Phosphorus 2013 Integration across Ecosystems: . Paper presented at Organic Phosphorus 2013 Integration across ecosystems 4-7 February 2013 Smithsonian Tropical Research Institute Republic of Panama (pp. 35-35).
Open this publication in new window or tab >>Can phospholipids and nucleic acids shed light on organic phosphorus turnover in lake sediment?
2013 (English)In: Organic Phosphorus 2013 Integration across Ecosystems / [ed] Turner, Benjamin L., 2013, p. 35-35Conference paper, Oral presentation with published abstract (Other academic)
Keywords
Organic phosphorus
National Category
Chemical Sciences
Research subject
Analytical Chemistry
Identifiers
urn:nbn:se:uu:diva-202754 (URN)
Conference
Organic Phosphorus 2013 Integration across ecosystems 4-7 February 2013 Smithsonian Tropical Research Institute Republic of Panama
Available from: 2013-06-26 Created: 2013-06-26 Last updated: 2013-11-13Bibliographically approved
Paraskova, J. V., Rydin, E. & Sjöberg, P. J. R. (2013). Extraction and quantification of phosphorus derived from DNA and lipids in environmental samples. Talanta: The International Journal of Pure and Applied Analytical Chemistry, 115, 336-341
Open this publication in new window or tab >>Extraction and quantification of phosphorus derived from DNA and lipids in environmental samples
2013 (English)In: Talanta: The International Journal of Pure and Applied Analytical Chemistry, ISSN 0039-9140, E-ISSN 1873-3573, Vol. 115, p. 336-341Article in journal (Refereed) Published
Abstract [en]

 Understanding the flux and turnover of phosphorus (P) in the environment is important due to the key role P plays in eutrophication and in the ambition to find cost-effective measures to mitigate it. Orthophosphate diesters, including DNA and phospholipids (PLs), represent a potentially degradable P pool that could support future primary production and eutrophication. In this study, extraction techniques were optimized and combined with colorimetric determination of extracted P to provide a selective quantification method for DNA-P and PL-P in agricultural soil, sediment and composted manure. The proposed method is rapid and reproducible with an RSD of <10%. Recovery, evaluated by spiking the sample matrices with DNA and PL standards, was over 95% for both DNA and PLs. The method can be used for the determination of the pool size of the two organic P fractions. Results show that DNA-P comprises 3.0% by weight of the total P (TP) content in the studied soil, 10.4% in the sediment and 8.4% in the compost samples. The values for PL-P are 0.5%, 6.0% and 1.7% for soil, sediment and compost, respectively.

Keywords
Organic phosphorus, Extraction, Soil, Sediment, Compost
National Category
Chemical Sciences
Identifiers
urn:nbn:se:uu:diva-201968 (URN)10.1016/j.talanta.2013.05.042 (DOI)000328095600047 ()
Available from: 2013-06-18 Created: 2013-06-18 Last updated: 2017-12-06Bibliographically approved
Spears, B. M., Dudley, B., Reitzel, K. & Rydin, E. (2013). Geo-Engineering in Lakes-A Call for Consensus. Environmental Science and Technology, 47(9), 3953-3954
Open this publication in new window or tab >>Geo-Engineering in Lakes-A Call for Consensus
2013 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 47, no 9, p. 3953-3954Article in journal, Editorial material (Other academic) Published
National Category
Natural Sciences
Identifiers
urn:nbn:se:uu:diva-203003 (URN)10.1021/es401363w (DOI)000318756000003 ()
Available from: 2013-07-02 Created: 2013-07-01 Last updated: 2017-12-06Bibliographically approved
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