Phosphorus fractions in biosolids, biosolid-amended soils, runoffs and its impact on primary productivity in aquatic ecosystems

10.32920/ryerson.14644737.v1 ◽

2021 ◽

Author(s):

Aslam Hanief

Keyword(s):

Aquatic Ecosystems ◽

Soil Phosphorus ◽

Land Application ◽

Organic P ◽

Storm Events ◽

Stratified Lakes ◽

P Pools ◽

Physical Chemical ◽

The Impact ◽

Biosolids Application

The impact of land application of biosolids on soil phosphorus (P) and subsequent transfer to aquatic ecosystems were assessed. Boxed reference soils were amended with two biosolids at a rate of 8 dry t/ha. Biosolids and soil samples taken over four months were sequentially fractionated to determine various inorganic and organic P pools. Also, within three weeks of biosolids application, four storm events were simulated and surface runoff and leachate from the soils were collected and analyzed for different P forms. The runoffs and equivalent inorganic nutrient were added to different mesocosms that mimicked stratified lakes. Samples from the mesocosms were periodically collected and analyzed for various physical, chemical and biological parameters. The results indicated that biosolids significantly affect different P pools in soils. Also, P loading from biosolids was expected to drive the mesocosms to hypereutrophication, yet the response was moderately eutrophic, followed by decline in chlorophyll a.

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Vertical phosphorus migration in biosolids-amended soils : concentrations in soils and leachates.

10.32920/ryerson.14644857.v1 ◽

2021 ◽

Author(s):

Yulia Markunas

Keyword(s):

Vertical Migration ◽

Organic Phosphorus ◽

Soil Phosphorus ◽

Soluble Reactive Phosphorus ◽

Land Application ◽

Soil Leachate ◽

Different Depths ◽

Receiving Waters ◽

Reactive Phosphorus ◽

Biosolids Application

The impacts of biosolids land application on soil phosphorus and subsequent transfer to aquatic ecosystems in the condition of the minimal slope were assessed. Soil, representing typical "Non response" Ontario soil, was amended with anaerobically digested biosolids at a rate of 8 tonnes/ha. Over five months, soil samples from two different depths were sequentially fractionated to determine various inorganic and organic phosphorus pools in order to evaluate phosphorus vertical migration within a soil profile. Soil leachate was analyzed for soluble reactive phosphorus and added to the aquariums mimicking receiving surface waters. Water from aquariums was tested for the presence of eutrophication. The results indicated that biosolids application did not significantly affect phosphorus concentrations in soil and did not cause phosphorus vertical migration. The concentrations of soluble reactive phosphorus also were not affected by biosolids. No signs of eutrophication were observed in receiving waters.

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Vertical phosphorus migration in biosolids-amended soils : concentrations in soils and leachates.

10.32920/ryerson.14644857 ◽

2021 ◽

Author(s):

Yulia Markunas

Keyword(s):

Vertical Migration ◽

Organic Phosphorus ◽

Soil Phosphorus ◽

Soluble Reactive Phosphorus ◽

Land Application ◽

Soil Leachate ◽

Different Depths ◽

Receiving Waters ◽

Reactive Phosphorus ◽

Biosolids Application

The impacts of biosolids land application on soil phosphorus and subsequent transfer to aquatic ecosystems in the condition of the minimal slope were assessed. Soil, representing typical "Non response" Ontario soil, was amended with anaerobically digested biosolids at a rate of 8 tonnes/ha. Over five months, soil samples from two different depths were sequentially fractionated to determine various inorganic and organic phosphorus pools in order to evaluate phosphorus vertical migration within a soil profile. Soil leachate was analyzed for soluble reactive phosphorus and added to the aquariums mimicking receiving surface waters. Water from aquariums was tested for the presence of eutrophication. The results indicated that biosolids application did not significantly affect phosphorus concentrations in soil and did not cause phosphorus vertical migration. The concentrations of soluble reactive phosphorus also were not affected by biosolids. No signs of eutrophication were observed in receiving waters.

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Submikroninių aerozolio dalelių kilmės ir fizikinių-cheminių parametrų įtaka atmosferos šiluminei pusiausvyrai

10.15388/vu.thesis.102 ◽

2020 ◽

Author(s):

◽

Julija Pauraitė-Dudek

Keyword(s):

Chemical Parameters ◽

Radiative Balance ◽

Submicron Aerosol ◽

Physical Chemical ◽

The Impact ◽

Aerosol Source

The impact of submicron aerosol source and physical-chemical parameters on atmospheric radiative balance

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Faculty Opinions recommendation of Eutrophication of aquatic ecosystems: bistability and soil phosphorus.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1026974.327468 ◽

2005 ◽

Author(s):

Oswald Schmitz

Keyword(s):

Aquatic Ecosystems ◽

Soil Phosphorus

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Reproduction and biomarker responses of Eisenia fetida after exposure to imidacloprid in biochar-amended soil

Biochar ◽

10.1007/s42773-021-00103-4 ◽

2021 ◽

Author(s):

Ngitheni Winnie-Kate Nyoka ◽

Ozekeke Ogbeide ◽

Patricks Voua Otomo

Keyword(s):

Eisenia Fetida ◽

Field Studies ◽

Application Rate ◽

Land Application ◽

Acetylcholinesterase Inhibition ◽

Beneficial Effects ◽

Pesticide Pollution ◽

The One ◽

The Impact ◽

Amended Soil

AbstractTerrestrial and aquatic ecosystems are increasingly threatened by pesticide pollution resulting from extensive use of pesticides, and due to the lack of regulatory measures in the developing world, there is a need for affordable means to lessen environmental effects. This study aimed to investigate the impact of biochar amendment on the toxicity of imidacloprid to life-cycle parameters and biomarker responses of the earthworm Eisenia fetida. E. fetida was exposed to 10% biochar-amended and non-amended OECD artificial soils spiked with 0, 0.75, 1.5, 2.25 and 3 mg imidacloprid/kg for 28 days. An LC50 of 2.7 mg/kg was only computed in the non-amended soil but not in the biochar-amended soil due to insignificant mortality. The EC50 calculated in the non-amended soil (0.92 mg/kg) for reproduction (fertility) was lower than the one computed in the biochar amended (0.98 mg/kg), indicating a decrease in toxicity in the biochar-amended substrate. Significant weight loss was observed at the two highest imidacloprid treatments in the non-amended soil and only at the highest treatment in the biochar-amended substrate, further highlighting the beneficial effects of biochar. Catalase activity decreased significantly at the two highest concentrations of non-amended soil. Yet, in the amended soil, the activity remained high, especially in the highest concentration, where it was significantly higher than the controls. This indicated more severe oxidative stress in the absence of biochar. In all non-amended treatments, there was a significant acetylcholinesterase inhibition, while lower inhibition percentages were observed in the biochar-amended soil. In most endpoints, the addition of biochar alleviated the toxic effects of imidacloprid, which shows that biochar has the potential to be useful in soil remediation. However, there is still a need for field studies to identify the most effective application rate of biochar for land application.

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Thirty-Nine-Year Wave Hindcast, Storm Activity, and Probability Analysis of Storm Waves in the Kara Sea, Russia

Water ◽

10.3390/w13050648 ◽

2021 ◽

Vol 13 (5) ◽

pp. 648

Author(s):

Stanislav Myslenkov ◽

Vladimir Platonov ◽

Alexander Kislov ◽

Ksenia Silvestrova ◽

Igor Medvedev

Keyword(s):

Climate Change ◽

Pareto Distribution ◽

Linear Trend ◽

Wind Waves ◽

Kara Sea ◽

The Arctic ◽

Storm Events ◽

Storm Activity ◽

Significant Linear Trend ◽

The Impact

The recurrence of extreme wind waves in the Kara Sea strongly influences the Arctic climate change. The period 2000–2010 is characterized by significant climate warming, a reduction of the sea ice in the Arctic. The main motivation of this research to assess the impact of climate change on storm activity over the past 39 years in the Kara Sea. The paper presents the analysis of wave climate and storm activity in the Kara Sea based on the results of numerical modeling. A wave model WAVEWATCH III is used to reconstruct wind wave fields for the period from 1979 to 2017. The maximum significant wave height (SWH) for the whole period amounts to 9.9 m. The average long-term SWH for the ice-free period does not exceed 1.3 m. A significant linear trend shows an increase in the storm wave frequency for the period from 1979 to 2017. It is shown that trends in the storm activity of the Kara Sea are primarily regulated by the ice. Analysis of the extreme storm events showed that the Pareto distribution is in the best agreement with the data. However, the extreme events with an SWH more than 6‒7 m deviate from the Pareto distribution.

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Arthrospira Platensis (Spirulina) Supplementation on Laying Hens’ Performance: Eggs Physical, Chemical, and Sensorial Qualities

Foods ◽

10.3390/foods8090386 ◽

2019 ◽

Vol 8 (9) ◽

pp. 386 ◽

Cited By ~ 1

Author(s):

Omri ◽

Amraoui ◽

Tarek ◽

Lucarini ◽

Durazzo ◽

...

Keyword(s):

Laying Hens ◽

Control Diet ◽

Dietary Supplementation ◽

Basal Diet ◽

Egg Yolk ◽

Arthrospira Platensis ◽

Cholesterol Concentration ◽

Physical Chemical ◽

Egg Yolks ◽

The Impact

The present study evaluated the effects of dietary supplementation of spirulina on laying hens’ performances: Eggs’ physical, chemical, and sensorial qualities. A total of 45 Lohman White hens, 44 weeks of age, were randomized into 3 groups of 15 birds. Hens were given 120 g/d of a basal diet containing 0% (control), 1.5%, and 2.5% of spirulina for 6 weeks. Albumen height and consequently Haugh unit were significantly affected by dietary supplementation of spirulina (p < 0.05) and by weeks on diet (p < 0.05). This supplement did not affect (p > 0.05) egg yolk weight or height. However, spirulina increased egg yolk redness (a*) from 1.33 (C) to 12.67 (D1) and 16.19 (D2) and reduced (p < 0.05) the yellowness (b*) parameter from 62.1(C) to 58.17 (D1) and 55.87 (D2). Egg yolks from hens fed spirulina were darker, more red, and less yellow in color than egg yolks from hens fed the control-diet (p < 0.0001). However, spirulina did not affect (p > 0.05) egg yolks’ total cholesterol concentration. In conclusion, a significant enhancement of egg yolk color was found in response to spirulina supplementation. Further investigations are needed to evaluate the impact of spirulina on egg yolks’ fatty acids profile.

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