Articles
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The role of storyboards and scrapbooks in propagating entrepreneurial value in family business settings
The concepts of entrepreneurial narrative and biography are an emerging field of entrepreneurship research, but there is more to entrepreneurial narrative and biography than written words. Consequentially, this research paper considers the use of scrapbooks and storyboards as active narrative tools for propagating value in family business narratives by conducting a semiotic analysis of a ...
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A study on ruthenium-based catalysts for pharmaceutical wastewater treatment
Ruthenium-based catalysts were prepared by a saturation-dip method. Their catalytic activity was evaluated by a catalytic wet oxidation (CWO) process. The ruthenium-based catalysts were used to purify organic pharmaceutical wastewater with high concentration pyridine and pyridine derivatives that have high chemical oxygen demand (COD). In the CWO process, organic pharmaceutical wastewater was ...
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NIMBY and building local political support
“Proposed Landfill Project Derailed”; “Landfill Expansion Turned Down”; “Price Break Denied For Haulers Dumping Local Trash”; “Recycling Proposal Unanimously Rejected.” These are just some of the headlines the solid waste industry has seen recently. Across the country and abroad, well-planned waste projects are being denied at an alarming rate. ...
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Photocatalytic removal of cyanide with illuminated TiO2
Effects of TiO2 dosage, pH and initial cyanide concentration on the removal efficiency of cyanide from aqueous solutions with illuminated TiO2 have been investigated. Adsorption and oxidation were recognized as significant processes for the elimination of cyanide. From the Langmuir isotherm, the maximum adsorption capacity was determined as 17.24 mg/g at pH 7. Adsorbed amount of cyanide slightly ...
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Rapid Technical Assessments - San Fernando City Philippines
In March 2010, barangay health workers along with licensed plumbers and engineers were deployed to 15 barangays to conduct rapid technical assessments in San Fernando City in the Philippines. Teams of three (one health worker, one plumber and one engineer) went to houses to look at the state of wastewater treatment at the household level and to determine the ...
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Mozambique and beyond: Insights from a career at the forefront of sanitation
Professor Sandy Cairncross, of the London School of Hygiene and Tropical Medicine, has been a pioneer in the water, sanitation and hygiene sector for more than 30 years. Inthis latest podcast in the Sanitation Matters series, he explains the work behind some of his major achievements and his thoughts on the future of the sector. He describes how he helped to design and market hundreds of ...
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Effluent
Effluent is an outflowing of water or gas from a natural body of water, or from a human-made structure. Effluent is defined by the United States Environmental Protection Agency as “wastewater - treated or untreated - that flows out of a treatment plant, sewer, or industrial outfall. Generally refers to wastes discharged into surface waters”.[1] The Compact Oxford ...
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Effects of leachate from tree leaves and grass litter on tadpoles
Tree species composition can change as a result of succession, climate change, fire suppression, and invasive species. These changes clearly affect forests, but they can also affect aquatic ecosystems based on differences in the input quality of leaf litter, such as plant secondary compounds. These compounds vary in type and concentration depending on species and can be toxic to aquatic ...
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Good modeling practice guidelines for applying multimedia models in chemical assessments
Multimedia mass balance models of chemical fate in the environment have been used for over 3 decades in a regulatory context to assist decision making. As these models become more comprehensive, reliable, and accepted, there is a need to recognize and adopt principles of Good Modeling Practice (GMP) to ensure that multimedia models are applied with transparency and adherence to accepted ...
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Applying biotic ligand models and Bayesian techniques: Ecological risk assessment of copper and nickel in Tokyo rivers
Biotic ligand models (BLMs) have been broadly accepted and used in ecological risk assessment of heavy metals for toxicity normalization with respect to water chemistry. However, the importance of assessing bioavailability by using BLMs has not been widely recognized among Japanese stakeholders. Failing to consider bioavailability may result in less effective risk management than would be ...
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Effects of test design and temperature in a partial life cycle study with the freshwater gastropod Potamopyrgus antipodarum
Potamopyrgus antipodarum is a candidate for a standardized mollusk partial life cycle study. This is a comparative study of two test designs (microplate and beaker), with additional endpoints to the proposed guideline methods, for example, tracking of continuous reproductive output over 28 d and attributing it to individual female snails. In addition, an investigation of the effects of ...
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Comparison of Self-Primers: A customer lead field test
I call on numerous accounts weekly. A question that often arises is “Which pump is best?” While this certainly varies from application to application, I tend to like to see performance to make that determination. My experience in college football and 15 years of professional wrestling taught me that ‘talk is cheap’ and that true winners will shine in a competition. Last ...
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Microbubbles Assisting Treatment Process
Professor Will Zimmerman of the Sheffield University, UK, is discussing a micro bubble generator for applications in the wastewater treatment industry. He also is talking about the ways of partnership and benefits this may have. Continue reading the full article ...
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Layered double hydroxide (LDH)-coated attapulgite for phosphate removal from aqueous solution
In this study, a composite adsorbent, layered double hydroxide (LDH)-coated attapulgite (LDH-AP), was synthesized and characterized. Its potential application for LDH stabilizer and phosphate (P) removal from aqueous solution was evaluated using the batch mode and continuous mode in a packed bed column. The batch experiments revealed that the data of P adsorption onto LDH-AP could be well ...
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Removal of ammonium from aqueous solutions using the residue obtained from struvite pyrogenation
This paper reports the results of laboratory studies on the removal of ammonium from aqueous solutions using struvite pyrogenation residues. A series of experiments were conducted to examine the effects of the pyrogenation temperature (90–210 °C) and time (0.5–4 h) on the ammonium release of struvite. In addition, the pyrolysate of struvite produced at different pyrogenation temperatures and ...
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Vulnerability analysis of interdependent critical infrastructures: case study of the Swedish railway system
Critical infrastructures provide essential services which enable our society to function. Disruptions in infrastructures can have widespread effects, not only for the originating infrastructure but also, through mutual dependencies, for other infrastructures. Identifying vulnerabilities inherent in these system–of–systems is thus highly critical for the proactive management and avoidance of ...
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Entropy generation in an asymmetrically cooled hollow sphere with temperature dependent internal heat generation
This paper presents an entropy generation analysis for steady conduction in a hollow sphere with temperature dependent internal heat generation and asymmetric convective cooling. An exact analytical solution for the temperature distribution is used to compute dimensionless local and total entropy generation rates in the hollow sphere. The total entropy generation rate depends on reference heat ...
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Species‐specific and trans‐generational responses to increasing salinity in sympatric freshwater gastropods
Freshwater salinization is a global concern partly attributable to anthropogenic salt contamination. The authors examined the effects of increased salinity (as NaCl, 250–4,000 µS/cm, specific conductance) on two sympatric freshwater gastropods (Helisoma trivolvis and Physa pomillia). Life stage sensitivities were determined by exposing naïve eggs or naïve juveniles (through adulthood and ...
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Comparison of nanosilver and ionic silver toxicity in Daphnia magna and Pimephales promelas
The increasing use of nanosilver in consumer products and the likelihood of environmental exposure warrant investigation into the toxicity of nanosilver to aquatic organisms. A series of studies were conducted comparing the potency of nanosilver to ionic silver (Ag+) at acute and sublethal levels using two test organisms (Daphnia magna and Pimephales promelas). The 48‐h D. magna lethal ...
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Contaminants of emerging concern in municipal wastewater effluents and marine receiving water
The occurrence and concentrations of contaminants of emerging concern (CECs) were investigated in municipal effluents and in marine receiving water. Final effluent from four large publicly owned treatment works (POTWs) and seawater collected near the respective POTW outfall discharges and a reference station were collected quarterly over one year and analyzed for 56 CECs. Several CECs were ...
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