scholarly journals Phosphate Removal from Nursery Runoff Water Using an Iron-Based Remediation System

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 795 ◽  
Author(s):  
Francisca Ordonez Hinz ◽  
Joseph P. Albano ◽  
P. Chris Wilson
Keyword(s):  
Nutrient Retention ◽  
Drainage Water ◽  
Phosphate Removal ◽  
Plant Production ◽  
Small Scale ◽  
Conceptual System ◽  
Runoff Water ◽  
Respective Treatment ◽  
The Media ◽  
Nursery Runoff

Phosphorous (P) losses from containerized plant production nurseries can be significant due to the low nutrient retention capacities of the media components. As environmental regulators establish, refine, and enforce nutrient criteria, effective methods are needed to reduce amounts of P in runoff and drainage water. This study investigated the use of a small scale flow-through ferrous iron (Fe(II))-based remediation system for chemically precipitating P. This system consisted of four inter-connected tanks, with the first two maintained under anaerobic conditions and the last two maintained under aerobic conditions. FeSO4 was introduced into the first of the aerobic tanks at different rates to achieve Fe:P ratios of 0, 9.0, 16.3, and 21.2. Water samples were collected from the systems, and P removal was monitored by ion chromatography. Phosphorus removal efficiencies of 78, 95, and 99% were observed for each respective treatment, indicating great potential for this conceptual system at Fe:P dosing ratios ≥16.3 and phosphorus concentrations between 3 and 5 mg/L. This type of system may especially be useful for nurseries with space limitations.

Detection and Dissipation of Isoxaben and Trifluralin in Containerized Plant Nursery Runoff Water

Weed Science ◽  
1996 ◽  
Vol 44 (3) ◽  
pp. 683-688 ◽  
Author(s):  
C. Wilson ◽  
T. Whitwell ◽  
M. B. Riley
Keyword(s):  
Pond Water ◽  
Plant Production ◽  
Application Site ◽  
Herbicide Application ◽  
Runoff Water ◽  
Runoff Event ◽  
Plant Nursery ◽  
Nursery Runoff ◽  
Irrigation Runoff ◽  
Container Plant

Herbicides used in containerized plant production have a potential to move off-site in irrigation runoff water. A granular formulation of isoxaben plus trifluralin was applied to a commercial container plant nursery bed. Herbicides were monitored in irrigation runoff and collection pond water over a period of 60 d. Greatest quantities of both herbicides were lost during the first runoff event following application. Approximately 9.2 and 0.7% of the applied isoxaben and trifluralin, respectively, moved from the application site in runoff water within 5 d after treatment. Herbicide concentrations in runoff water were highest (0.75 μg ml−1 isoxaben and 0.08 (μg ml−1 trifluralin in 1992) during the first 0.25 h following herbicide application. Concentrations in the runoff collection pond climaxed following the first runoff event and decreased to less than 1 ng ml−1 within 60 d after treatment. Photodegradation of isoxaben within the surface 2.5 cm of pond water was greater in light as compared to dark. These studies indicate that isoxaben and trifluralin move from the site of application, but that neither accumulate in the runoff water collection ponds.

Impact of Fertigation versus Controlled-release Fertilizer Formulations on Nitrate Concentrations in Nursery Drainage Water

2011 ◽  
Vol 21 (2) ◽  
pp. 176-180 ◽  
Author(s):  
P. Chris Wilson ◽  
Joseph P. Albano
Keyword(s):  
Water Quality ◽  
Controlled Release ◽  
Drainage Water ◽  
Plant Production ◽  
Fertilization Program ◽  
Median Concentration ◽  
Nitrate N ◽  
Production Area ◽  
Foliage Plant ◽  
Production Areas

Nitrate-nitrogen (N) losses in surface drainage and runoff water from ornamental plant production areas can be considerable. In N-limited watersheds, discharge of N from production areas can have negative impacts on nontarget aquatic systems. This study monitored nitrate-N concentrations in production area drainage water originating from a foliage plant production area. Concentrations in drainage water were monitored during the transition from 100% reliance on fertigation using urea and nitrate-based soluble formulations (SF) to a nitrate-based controlled-release formulation (CRF). During the SF use period, nitrate-N concentrations ranged from 0.5 to 322.0 mg·L−1 with a median concentration of 31.2 mg·L−1. Conversely, nitrate-N concentrations during the controlled-release fertilization program ranged from 0 to 147.9 mg·L−1 with a median concentration of 0.9 mg·L−1. This project demonstrates that nitrate-N concentrations in drainage water during the CRF program were reduced by 94% to 97% at the 10th through 95th percentiles relative to the SF fertilization program. Nitrate-N concentrations in drainage water from foliage plant production areas can be reduced by using CRF fertilizer formulations relative to SF formulations/fertigation. Similar results should be expected for other similar containerized crops. Managers located within N-limited watersheds facing N water quality regulations should consider the use of CRF fertilizer formulations as a potential tool (in addition to appropriate application rates and irrigation management) for reducing production impacts on water quality.

Modelling of Solute Transfer to Surface Runoff

1992 ◽  
Vol 26 (7-8) ◽  
pp. 1851-1856 ◽  
Author(s):  
J. L. Lai ◽  
K. S. L. Lo
Keyword(s):  
Potassium Chloride ◽  
Surface Runoff ◽  
Laboratory Experiments ◽  
Overland Flow ◽  
Chloride Concentration ◽  
Runoff Water ◽  
Mixing Depth ◽  
Change Rate ◽  
Solute Transfer ◽  
The Media

A mixing-based model for describing solute transfer to overland flow was developed. This model included a time-dependent mixing depth of the top layer and a complete-mixed surface runoff zone. In a series of laboratory experiments, runoff was passed at various velocities and depths over a medium bed. The media were saturated with uniform concentration of potassium chloride solution. Runoff water was sampled at the beginning and end of the flume and the potassium chloride concentration analyzed. Using this model, dimensionless ultimate mixing depth and dimensionless change rate of mixing depth from experimental data were investigated and implemented. The results showed that the Reynolds number and relative roughness are two important factors.

Plant factories - closed plant production systems.

2021 ◽  
pp. 229-245
Author(s):  
Lynette Morgan
Keyword(s):  
Production Systems ◽  
Environmental Control ◽  
Plant Production ◽  
Small Scale ◽  
Cultivation System ◽  
Crop Cultivation ◽  
Multilevel Systems ◽  
Crop Nutrition ◽  
Plant Factory ◽  
Growing Environment

Abstract This chapter focuses on plant factories, which is an indoor, enclosed, crop cultivation system where the growing environment is precisely controlled to maximize production. Topics covered are the history and background of plant factories,advantages of plant factories, criticisms of plant factories, costs and returns of plant factories, domestic and other small-scale plant factories, crops produced including pharmaceuticals, vertical or multilevel systems, including moveable systems, crop nutrition in plant factories, plant factory environments, lighting, environmental control and plant quality in plant factories, and automation and robotization.

scholarly journals Barium-Encapsulated Biodegradable Polycaprolactone for Sulfate Removal

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1789
Author(s):  
Changseok Han ◽  
Mallikarjuna Nadagouda
Keyword(s):  
Electron Microscopy ◽  
Barium Carbonate ◽  
High Capacity ◽  
Small Scale ◽  
Ohio River ◽  
Sulfate Removal ◽  
Transmission Electron ◽  
Before And After ◽  
High Resolution Tem ◽  
The Media

Various compositions of barium carbonate (BaCO3) loaded polycaprolactone (PCL) composites were prepared, including 2.5/97.5, 10/90, 30/70, 50/50 and 90/10 (PCL/BaCO3), via re-precipitation technique. Small-scale column tests were conducted to study the efficiency of sulfate removal using the PCL/BaCO3 composites. The composites before and after their use to remove sulfate were extensively characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), high-resolution TEM (HR-TEM), and thermogravimetric analysis (TGA). As PCL is a biodegradable polymer, these composites are environmentally friendly and have several advantages over barium sulfate precipitation in overcoming clogging issues in filters or resins due to collection of natural organic matter (NOM). The media used in this study exhibited high capacity and was able to remove more than 90% sulfate from synthetic sulfate containing waters and NOM samples collected from the Ohio River.

scholarly journals Norway at the Border of EU – Cross-Border Shopping and its Implications

2009 ◽  
Vol 26 (2) ◽  
pp. 205-231 ◽  
Author(s):  
Randi Lavik ◽  
Sturla Nordlund
Keyword(s):  
Small Scale ◽  
Special Focus ◽  
Political Debate ◽  
General Increase ◽  
Cross Border ◽  
Obvious Reason ◽  
The Media ◽  
Price Differences ◽  
Different Sources ◽  
The Eu

Cross-border shopping has for many years been an issue in the political debate in Norway, and it remains so. The focus of the media is mostly on alcohol and tobacco shopping, but shopping for other goods such as meat and other groceries are at least as important. Aim The aim of this article is to present estimates of the total cross-border shopping, especially from Sweden, with a special focus on alcohol and tobacco. Data Data are collected from different sources, mainly from the two research institutes SIFO and SIRUS. Results The total private import by travelers to Norway has increased, and so has special cross-border shopping from Sweden. An obvious reason is the price differences on alcohol, tobacco and meat in particular, which have been increasing since the neighbouring countries Sweden and Finland became members of the EU in 1995. Another reason is the general increase in travelling, especially by airplanes, during later years. People living near the border are, not surprisingly, much more often border-shoppers than people living far away. Border-shopping also has an illegal side, since some people violate the quite restrictive Norwegian quotas on travelers import e.g. of alcohol and tobacco. Around 20 per cent of the of the Norwegian travellers see such “small-scale smuggling” of spirits as a serious crime, and 25 percent had brought too much alcohol. The total private import by travelers, legal as well as illegal, represents a considerable revenue loss to Norway.

Media Anthropology

Anthropology ◽  
2012 ◽  
Author(s):  
Rebecca Pardo ◽  
Elizabeth ErkenBrack ◽  
John L. Jackson
Keyword(s):  
Mass Media ◽  
Digital Media ◽  
Cultural Practices ◽  
Small Scale ◽  
Thick Description ◽  
Anthropological Perspective ◽  
Media Anthropology ◽  
History Of ◽  
The Media ◽  
Object Of Study

Although anthropologists have long addressed topics related to media and communications technologies, some have argued that a truly institutionalized commitment to the anthropology of media has only developed within the past twenty years. This might be due, at least in part, to a traditional disciplinary emphasis on “primitive” communities lacking the ostensible features of modernity, including electronic forms of mass mediation. Thick description, a central aim of ethnography as touted by Clifford Geertz, was historically geared toward small-scale societies and precluded the study of contemporary forms of mass media in modern life. However, anthropologists have begun to develop productive ways of including mass mediation into their ethnographic accounts. Indeed, it is becoming increasingly difficult to talk about cultural practices at all without some nod to the ubiquity of global media. From an anthropological perspective, it is important to consider varying cultural contexts of mass-media production, consumption, and interpretation. And this begs a question that several anthropologists have begun to answer. What is the most appropriate way to study “the media” as a cultural phenomenon? Content analyses of media texts? The measuring and identifying of media’s social effects and influence? Ethnographic studies of “reception” and “production”? Or something else entirely? Anthropologists engage in all of these and more. Additionally, new questions are emerging about how anthropology might best address digital media and online communities. There are multiple ways in which anthropologists have engaged with “the media” both as a tool of representation and an object of study. To outline some of those ways, it makes sense to provide a history of developments in the field, summarizing several thematic topics that have recently been of central focus to anthropologists of media, including religion, globalization, and nationalism. It also makes sense to think about approaches to studying mass media that other disciplines deploy—disciplines that are in conversation with anthropologists on this subject, including and especially media studies, communications studies, and cultural studies. The categorical divisions here attempt to reflect anthropology’s historical commitments to various analytical, thematic, and medium-based modes of inquiry.

scholarly journals Infiltration Capacity of Rain Gardens Using Full-Scale Test Method: Effect of Infiltration System on Groundwater Levels in Bergen, Norway

Land ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 520
Author(s):  
Guri Venvik ◽  
Floris Boogaard
Keyword(s):  
Full Scale ◽  
Cold Climate ◽  
Test Method ◽  
Small Scale ◽  
Delayed Response ◽  
Rain Gardens ◽  
Infiltration Capacity ◽  
Runoff Water ◽  
Infiltration Test ◽  
Scale Test

The rain gardens at Bryggen in Bergen, Western Norway, is designed to collect, retain, and infiltrate surface rainfall runoff water, recharge the groundwater, and replenish soil moisture. The hydraulic infiltration capacity of the Sustainable Drainage System (SuDS), here rain gardens, has been tested with small-scale and full-scale infiltration tests. Results show that infiltration capacity meets the requirement and is more than sufficient for infiltration in a cold climate. The results from small-scale test, 245–404 mm/h, shows lower infiltration rates than the full-scale infiltration test, with 510–1600 mm/h. As predicted, an immediate response of the full-scale infiltration test is shown on the groundwater monitoring in the wells located closest to the infiltration point (<30 m), with a ca. 2 days delayed response in the wells further away (75–100 m). Results show that there is sufficient capacity for a larger drainage area to be connected to the infiltration systems. This study contributes to the understanding of the dynamics of infiltration systems such as how a rain garden interacts with local, urban water cycle, both in the hydrological and hydrogeological aspects. The results from this study show that infiltration systems help to protect and preserve the organic rich cultural layers below, as well as help with testing and evaluating of the efficiency, i.e., SuDS may have multiple functions, not only storm water retention. The functionality is tested with water volumes of 40 m3 (600 L/min for 2 h and 10 min), comparable to a flash flood, which give an evaluation of the infiltration capacity of the system.

Growing Ourselves to Death? Economic and Ecological Crises, the Growth of Waste, and the Role of the Media and Cultural Industries

2015 ◽  
Vol 8 (1) ◽  
pp. 68-81
Author(s):  
Trish Morgan
Keyword(s):  
Political Ecology ◽  
Ecological Crisis ◽  
Media Industries ◽  
Anthropogenic Factors ◽  
Small Scale ◽  
Cultural Industries ◽  
Capitalist System ◽  
The Media ◽  
Media Discourses

Since the financial crash of 2008, large sectors of capitalist economies have been enveloped by a crisis that is typically represented by media discourses in purely economic and financial terms. However, the crisis is also ecological. Yet, while media discourses frequently embrace and propose small-scale environmental remedies, it is rarely pointed out that such calls stand at odds with the consumer capitalist system under which the media industries operate. Adopting a ‘business as usual’ approach to consumption, the media industries encourage the public to shop their way out of recession, despite crippling austerity measures that have been imposed on them. This is in the face of an unprecedented ecological crisis which is now largely accepted as due to anthropogenic factors. In light of this ecological crisis, continued growth-based economic paradigms are increasingly deemed unsustainable. Yet frequently, media discourse uncritically takes growth and waste as two aspects of an unchanging and necessary paradigm. Against this backdrop of economic and ecological crises this paper draws on a set of critical cross-disciplinary literature from Harvey's political economy, to Foster and Moore's political ecology to Baran and Sweezy on waste, through to Adorno, Bourdieu and Garnham, to identify and engage with the strategic role of the media. It outlines crisis theories of economy and ecology, moving on to discuss crucial, if neglected aspects of the role of the media and cultural industries with respect to these crises. This paper advances the view that the role of the media in construction of norms with respect to consumption practices and waste is of significance and arguably needs to be incorporated into crisis theory of both economy and ecology.

scholarly journals Phosphate removal by mineral-based sorbents used in filters for small-scale wastewater treatment

2008 ◽  
Vol 42 (1-2) ◽  
pp. 189-197 ◽  
Author(s):  
Jon Petter Gustafsson ◽  
Agnieszka Renman ◽  
Gunno Renman ◽  
Katarina Poll
Keyword(s):  
Wastewater Treatment ◽  
Phosphate Removal ◽  
Small Scale
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