Release of organic P forms from lake sediments

Ahlgren, Joakim; Reitzel, Kasper; Brabandere, Heidi De; Gogoll, Adolf; Rydin, Emil

doi:10.1016/j.watres.2010.09.020

Cited by 102 publications

(39 citation statements)

References 25 publications

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“…Because of a relatively small water depth and a large water surface area, shallow lakes are particularly susceptible to eutrophication-induced algal bloom and water quality degradation [8][9][10]. For a shallow lake, the wind-induced shear stress on the lake surface can be efficiently transferred downward through the shallow water column to the lakebed, resuspending bed sediments from which nutrients can be released into the ambient water [11][12][13][14][15][16]. The threshold shear stress, beyond which the resuspension of bed sediments will incept, depends on the physiochemical characteristics (e.g., texture, age and compaction) of the sediments [17,18].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Distribution of Eutrophication in Lake Tai as Affected by Wind

Zhang

Wang

et al. 2017

Water

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Abstract:One common hypothesis is that wind can affect concentrations of nutrients (i.e., nitrogen and phosphorus) and chlorophyll-a (Chl-a) in shallow lakes. However, the tests of this hypothesis have yet to be conclusive in existing literature. The objective of this study was to use long-term data to examine how wind direction and wind speed affect the spatiotemporal variations of total nitrogen (TN), total phosphorus (TP) and Chl-a in Lake Tai, a typical shallow lake located in east China. The results indicated that the concentrations of nutrients and Chl-a tended to decrease from the northwest to the southeast of Lake Tai, with the highest concentrations in the two leeward bays (namely Meiliang Bay and Zhushan Bay) in the northwestern part of the lake. In addition to possible artificial reasons (e.g., wastewater discharge), the prevalent southeastward winds in warm seasons (i.e., spring and summer) and northwestward winds in cool seasons (i.e., fall and winter) might be the major natural factor for such a northwest-southeast decreasing spatial pattern. For the lake as a whole, the concentrations of TN, TP and Chl-a were highest for a wind speed between 2.1 and 3.2 m·s −1 , which can be attributed to the idea that the wind-induced drifting and mixing effects might be dominant in the bays while the wind-induced drifting and resuspension effects could be more important in the other parts of the lake. Given that the water depth of the bays was relatively larger than that of the other parts, the drifting and mixing effects were likely dominant in the bays, as indicated by the negative relationships between the ratios of wind speed to lake depth, which can be a surrogate for the vertical distribution of wind-induced shear stress and the TN, TP and Chl-a concentration. Moreover, the decreasing temporal trend of wind speed in combination with the ongoing anthropogenic activities will likely increase the challenge for dealing with the eutrophication problem of Lake Tai.

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Section: Introductionmentioning

confidence: 99%

Spatiotemporal Distribution of Eutrophication in Lake Tai as Affected by Wind

Zhang

Wang

et al. 2017

Water

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“…Although this reduction was half what could be achieved, it could be much worse with a low Fe/P ratio -even below 10% [34][35]. The low DO level (Table 2) could be another factor that affects the low reduction in laboratory studies [34][35][36]. The efficiency measured during the field experiment was found to be similar (49%) to the lab results for 5% FeCl 3 (Table 3), despite the use of a higher FeCl 3 concentration.…”

Section: Discussionmentioning

confidence: 57%

Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Bednarek¹,

Szklarek²,

Dziedziczak³

et al. 2016

Pol. J. Environ. Stud.

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The development of civilization and its accompanying anthropopressure have increased the accumulation of biogenic elements in aquatic ecosystems, which has accelerated the eutrophication of water bodies all over the world [1][2][3], and by doing so increased the production of tides of toxic cyanobacteria [4][5]. There is, therefore, a need to integrate ecohydrology with engineering solutions on the catchment scale to slow the rate of eutrophication [6], with the potential to permanently decrease the content of bioavailable phosphorus in water supplies Pol. J. Environ. Stud. Vol. 25, No. 5 (2016), 1847-1855 AbstractThe greatest source of phosphorus pollution in the freshwater ecosystem is erosion from agricultural areas and point sources. Although this pollution is typically moderated by precipitation and sedimentation, biological and physicochemical methods can be used. The aim of our study was to construct an alternative prototype solution incorporating a filter bed made of suitable recycled phytogenic materials (hemp and harl flax) mixed with chemical compounds (Ca(OH) 2 , FeCl 3 , and Al 2 (SO 4 ) 3 ) based on the results of laboratory and field experiments. An 80-90% reduction was noted for deposits with Ca(OH) 2 and Al 2 (SO 4 ) 3 compounds, and 42% for FeCl 3 during laboratory studies. The field studies did not provide such a high reduction of phosphates -only 2% for the Ca(OH) 2 deposit and 49% for the FeCl 3 deposit. This could be attributed to variable physical parameters (pH, temperature and dissolved oxygen) and high negative correlation (r = -0.6296; p = 0.003) with nitrate reduction for the Ca(OH) 2 deposit. However, greater reduction was noted when the phosphate concentration exceeded 1 mg PO 4 3-L -1 in field experiments.

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“…Many studies have indicated that oxygen is the vital factor controlling P release in the sediment, which means the P generally has a higher release rate under anoxic conditions, via its effect on Fe (III) and Mn (IV) (Ahlgren et al 2011;Kraal et al 2013). There are also many researches indicated the dissolved oxygen (DO) is the vital environment factor for P release and burial (Ingall et al 1993;Sulu-Gambari et al 2015).…”

Section: Conceptual Model Of P Biogeochemical Cyclementioning

confidence: 99%

Phosphorus characteristics, distribution, and relationship with environmental factors in surface sediments of river systems in Eastern China

Zhang

Jin

Zhu

et al. 2016

Environ Sci Pollut Res

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Phosphorus (P) is an essential nutrient for aquatic organisms. However, too much P discharged into limnetic ecosystems can induce eutrophication. The concentration of P in freshwater ecosystems has escalated in Eastern China due to overuse of fertilizer and excess emission of sewage, which is the result of the development of industry and agriculture in this area. However, little is known about the P characteristics and its environmental factors in river systems. Here, we present the results of P characterization and its relationships with environmental factors in Eastern China by applying SMT and 31 P-NMR methods. The results showed that the concentrations of P in surface sediments varied with the river system, and more than 50 % of the samples had P concentrations exceeding 500 mg kg −1. HCl-Pi was the dominant Pi in surface sediments, with the highest percentage (96.5 %) in the Yellow River System. Mono-P was the dominant Po in river sediments, followed by DNA-P. The PCA approach indicated that NaOH-Pi and ortho-P clustered in one group, with a second group including mono-P, diesters-P, and HCl-Pi. Phon-P and pyro-P belonged to different groups. On a regional scale, NaOH-Pi and Po showed a negative relationship with pH in sediments. Continuous eutrophication was induced by the presence of dams, and oxygen-consuming pollutants, such as NH 3 -N and CODcr, even when external P input was cut in heavily polluted rivers. The research revealed the characteristics of P in different river systems and proposed a conceptual model of P biogeochemical cycles in heavily polluted rivers. Results from this study may provide insight into P characteristics in Eastern China and would set a scientific basis for effective P management in developing countries.

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Release of organic P forms from lake sediments

Cited by 102 publications

References 25 publications

Spatiotemporal Distribution of Eutrophication in Lake Tai as Affected by Wind

Spatiotemporal Distribution of Eutrophication in Lake Tai as Affected by Wind

Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Phosphorus characteristics, distribution, and relationship with environmental factors in surface sediments of river systems in Eastern China

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