Lake Winnipeg Basin: Advocacy, challenges and progress for sustainable phosphorus and eutrophication control

Ulrich, Andrea E.; Malley, D. F.; Watts, Peter

doi:10.1016/j.scitotenv.2015.09.106

Cited by 67 publications

(26 citation statements)

References 39 publications

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“…Most home gardeners over-fertilize and more potted plants drown from excessive watering than die from too little. Over-fertilization leads to eutrophication of water bodies [75,76], and no home gardener wants to see his or her plants die. An educational concept like "What You Can Learn from a Green Thumb" could help home gardeners develop practices that were both ecologically more sound and personally more satisfying.…”

Section: Discussionmentioning

confidence: 99%

Marketing Green Fertilizers: Insights into Consumer Preferences

Dahlin

Halbherr

Kurz³

et al. 2016

Sustainability

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Abstract:In an effort to support the long-term viability of the bioenergy industry through an end market for digestate, we investigated purchasing preferences for fertilizer product features in the home gardening market. We conducted a discrete choice experiment (DCE), presenting 504 respondents with a total of 6048 product attribute choices in a simulated context that replicated the tradeoff decisions made in the real marketplace. We analyzed the choice data using a hierarchical Bayes estimate to generate part-worth utilities for fertilizer product attributes. We then conducted a latent class analysis to identify market segments that could be expected to respond to differentiated product design strategies. We were able to quantify both purchasing preferences for fertilizer product attributes as well as the importance of each attribute to the perceived utility of a product. We were further able to identify five distinct market segments that make clear the potential for differentiated strategies in the home gardening market. We found both negative and positive price sensitivities, with sociodemographically distinct subgroups that favored low-, mid-, and high-priced products. We also found purchasing preferences for brand status, product labeling and nutrient values. Our results provide insights that should help product managers in the biogas industry develop marketing strategies to integrate digestate into a sustainable energy production system.

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Section: Discussionmentioning

confidence: 99%

Marketing Green Fertilizers: Insights into Consumer Preferences

Dahlin

Halbherr

Kurz³

et al. 2016

Sustainability

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“…A similar fall was reported for 27.2% Al 2 (SO 4 ) 3 . For both the highest and lowest concentrations, the starting efficiency was low -even below 0% for 13.6% Al 2 (SO 4 ) 3 (Fig. 9).…”

Section: Laboratory Experimentsmentioning

confidence: 97%

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confidence: 99%

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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“…Ces entités aquatiques sont sujettes à de fortes pollutions eu égard aux intenses pressions anthropiques (Ajonina et al, 2015 ;Goody et al, 2016 ;Kaspersen et al, 2016 ;Ulrich et al, 2016). L′une des formes particulières de cette pollution est celle liée aux éléments en trace métallique (ETM), particulièrement celle au fer.…”

Section: Introductionunclassified

Prédiction de l’évolution spatio-temporelle du fer à l’exutoire d’un fleuve tropical : cas du fleuve Sassandra à Gaoulou (Côte d’Ivoire)

Yao¹,

Agbri²,

Bamba³

et al. 2017

Int. J. Bio. Chem. Sci

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La modélisation de l′évolution spatio-temporelle du fer à l′exutoire du fleuve Sassandra (la station hydrométrique de Gaoulou) a fait l′objet de cette étude. Pour ce faire, il a été utilisé le modèle hybride « ACP-PMC ». Deux scénarios ont été étudiés : la modélisation statique du fer et la modélisation dynamique du fer. La première partie de cette étude a été consacré à la recherche des paramètres d′entrée du perceptron multicouche (PMC) par l′analyse en composante principal (ACP). Les résultats obtenus ont permis de choisir comme paramètres d′entrée pour la modélisation statique du fer : les ions sulfates (SO 4 2-), le pH, la conductivité, le dioxyde de silicium (SiO 2 ) et le débit mensuel du fleuve Sassandra. A ces paramètres, il a été ajouté le paramètre temps (mois) pour la modélisation dynamique du fer. Les différentes simulations réalisées par le PMC, ont permis de montrer que les modèles 5-1-1 et 6-12-1 prédisent à plus de 99% respectivement les évolutions statique et dynamique du fer à Gaoulou. Ainsi, l′utilisation de ce modèle hybride est-t-il jugée très satisfaisante. Ce modèle peut servir de socle pour d′éventuelles études visant la gestion rationnelle, la protection et le développement durable du fleuve Sassandra et de l′océan Atlantique au niveau de l′exutoire de ce fleuve. © 2016 International Formulae Group. All rights reserved.Mots clés : ACP, modèle « ACP-PMC », océan Atlantique, pollution métallique, PMC.Prediction of the spatial and temporal evolution of the iron at tropical river outfall: case of Sassandra River at Gaoulou (Côte d'Ivoire) ABSTRACTThe modeling of the spatial and temporal evolution of the iron at the Sassandra River outfall (hydrometric station of Gaoulou) is the subject of this study. To do this, it was used the hybrid model "PCA-MLP." Two scenarios were studied: static modeling of iron and dynamic modeling of iron. The first part of this study has been devoted to research of the input parameters of multilayer perceptron (MLP) by principal component analysis (PCA). The results obtained allowed to select as input parameters for the static modeling of the iron: sulphate ions (SO 4 2-), pH, conductivity, silicon dioxide (SiO 2 ) and the monthly rate of the Sassandra River. In these settings, it was added the time parameter (month) for the dynamic modeling of the M. K. YAO et al. / Int. J. Biol. Chem. Sci. 10(6): 2768-2780 iron. The various simulations performed by the PMC showed that the models 5-1-1 and 6-12-1 predict more than 99% static and dynamic evolutions of the iron at Gaoulou respectively. Thus, the use of this hybrid model is satisfactory. It can be used for any studies to rational management, protection and sustainable development of the Sassandra River and the Atlantic Ocean near to Sassandra outfall.

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Lake Winnipeg Basin: Advocacy, challenges and progress for sustainable phosphorus and eutrophication control

Cited by 67 publications

References 39 publications

Marketing Green Fertilizers: Insights into Consumer Preferences

Marketing Green Fertilizers: Insights into Consumer Preferences

Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Prédiction de l’évolution spatio-temporelle du fer à l’exutoire d’un fleuve tropical : cas du fleuve Sassandra à Gaoulou (Côte d’Ivoire)

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