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Streaks of white that coat roads and cars. Powdery footprints smudged into floors. It’s the time of year when much of the United States relies on road salt to keep ice at bay and accepts the nuisances that come with it. But beyond the inconvenience, all that salt has potentially serious, long-term effects on the environment, human health and infrastructure. Steven Goldsmith, PhD, an associate professor of Geography and the Environment at Villanova University, researches topics in watershed biogeochemistry and environmental health. A focus of his lab is the study of de-icing practices on water quality. Recently, Dr. Goldsmith shared insights from his work, exploring the widespread consequences of road salt and potential solutions to reduce its harm. Villanova PR: You have led or participated in research focused on the environmental impacts of road salt application, often locally, but with much broader implications. What have some of those studies found? Steve Goldsmith: In 2022, we published a paper showing that salt—sodium in particular—is seeping into Philadelphia's water supply, and it's timed with snow melts. We found that if you drank a glass of tap water during the peak period in the winter of 2018-19, your sodium intake would be six times what the Environmental Protection Agency (EPA) recommends within a glass of water for someone on a low-sodium diet. We are susceptible in this region because most of our water supply comes from rivers, and the rivers receive that salt runoff. Some of our findings indicate this is a chronic issue and not limited to winter months. All that contaminated shallow groundwater causes the concentration to rise year-round, even in the summer. In a recent paper, we discuss the issue of salt that lands on the side of the road. When it does, it infiltrates into soil, and then it goes into shallow groundwater before entering our streams. Oftentimes when salt is applied to the road and you receive that initial precipitation, you are left with runoff with salinity near the concentration of sea water, which is very bad for freshwater organisms. PR: Have those studies found other impacts beyond those created directly by sodium? SG: It’s certainly not just a sodium issue—it's also a chloride issue. Chloride does have a negative impact on aquatic organisms, but it can also corrode drinking water infrastructure. If you have lead pipes in that infrastructure, that can lead to a range of human health issues. Even just to prevent those problems, applying chemicals to protect from the corrosion of pipes increases costs. Perhaps the worst part is when road salt infiltrates shallow soil and groundwater, the sodium is left behind preferentially in soils because it's displacing other positively charged elements, which could then go into groundwater. The elements it replaces are metals. If we have more salt runoff on the side of the roads, chances are, if we look in those streams, we are going to see higher concentrations of heavy metals like copper, zinc and even lead. PR: You have mentioned the efficacy of brine. What is brine and why is it more effective than traditional road salt? SG: If you’ve ever driven behind a rock salt truck, you probably noticed it pelts your windshield and shoots salt everywhere. A lot of that rock salt ends up following the natural trajectory of the road, which is designed to drain towards the sides to keep water from pooling. As soon as a snowstorm happens, it's going to melt and flow into the storm drain. That, of course, is bad for the environment, but also doesn’t help remove ice from the road. With brine, the application is a diluted road salt with water mixture that is usually about 23 percent sodium chloride by volume, and it’s referred to as an “anti-icing” measure. The saltwater infiltrates the top layer of pavement and embeds in the roadway itself, which keeps ice from crystallizing when snow or water hits the surface. To use an analogy, let’s say you have a large rock that you placed on top of the pavement, but you also have a quarter of that rock’s volume in sand. If you put that sand onto the pavement, it will permeate into nooks and crannies. That's the same idea here: use less material and in a way that makes it stick better to the surface and reduces the need to reapply as often during and after storms. PR: What are potential positive impacts if municipalities switch from road salt to brine? SG: There are limited studies on this, but it's been shown that if done properly, brining can reduce salt runoff into streams by anywhere from 23 to 40 percent. If it's 40 percent, you have almost cut the problem in half, and that lower peak salt concentration and runoff would have a profound positive impact on aquatic organisms that are downstream. From a cost standpoint—and I say this theoretically because there are other up-front costs associated with brining at the municipal level—if you reduce salt concentrations by up to 40 percent it means you apply a lot less and therefore spend a lot less. PR: What can individuals do to decrease road salt runoff, and how much of an impact does individual use have? SG: We can start by addressing the household salt application problem. Another one of our recent papers suggests that other impervious surfaces, like driveways, sidewalks and parking lots, are probably contributing even more than the roadway application. The best estimate is that individual or private contractor use could be over 10 times what you see on roads. For researchers, part of addressing this is trying to understand why people apply so much salt on their personal properties: are they afraid of lawsuits? Keeping with the Joneses? Are they not aware of ordinances that say you have to shovel within a certain number of hours, which would negate the need for salt anyway? For homeowners and other individuals, one proposed solution is to use a coffee mug’s worth of salt for every 10 sidewalk squares. Think of it as a “low-sodium diet” to make sure you’re not overapplying. It’s a way we can limit our use of salt and do so in a way that doesn't jeopardize safety. These individuals can also sweep up salt applied before a storm that never materialized to use before the next one. This will prevent the possibility of rain needlessly dissolving the salt. PR: Are there effective alternatives to road salt that individuals can use? SG: The only truly effective alternative, unfortunately, is simply using less road salt. While some people apply sand, it also washes into local streams, causing environmental harm. Another option that has gained attention is beet juice—what I like to call the “Dwight Schrute” solution. Beet juice actually works better than road salt because its organic acids prevent ice from crystallizing at temperatures much lower than those at which rock salt is effective. However, from an environmental standpoint, beet juice contains high levels of nutrients, which can contribute to algae growth if it enters waterways. Additionally, recent studies suggest it may also be toxic to aquatic organisms. The growing consensus is that while some road salt is necessary, we need to use less of it.
Putting a price tag on environmental projects
Unlike a grocery store, the goods and services in the environment — think clean water, tree cover, or flood control — don’t come with a price tag. Researchers in the University of Delaware Department of Applied Economics and Statistics have received a $1.5 million grant to assess the value of what is gained or lost from environmental projects. The three-year grant from the U.S. Army Engineer Research and Development Center, the chief research and development center for the federal environmental engineering agency U.S. Army Corps of Engineers, will pave the way for UD environmental economists to develop a web-based platform to help the Corps. The research team is led by Maik Kecinski, associate professor in the Department of Applied Economics and Statistics and also includes department colleagues Kent Messer and Martin Heintzelman, as well as three graduate researchers. The team will create an online platform to help the Corps estimate the monetary value of the ecosystem impacts through its ongoing and proposed projects across the U.S. Kecinski said many of the Corps’ projects involve natural resources, such as building dams or restoring rivers. Those projects require labor hours and equipment, each with a market value. “But the big piece the Corps doesn’t have is what is the environmental value that’s created or lost through these projects?” Kecinski said. The project came about after ERDC representatives visited UD in 2023. Kent Messer, Professor of Applied Economics, presented research about behavioral aspects around water quality and conservation and learned about ERDC’s research needs. Messer said that the big takeaway from those discussions was that ERDC was interested in having a platform to show the ecosystem services value of its projects. “So that was an exciting opportunity to connect and partner with them on the development of a tool that could help them in this regard,” Messer said. Messer said the opportunity to work with the Corps to assess its projects nationwide is “huge” for the University and for UD’s College of Agriculture and Natural Resources. “It speaks enormously to our college’s prominence in environmental economics issues,” Messer said. Martin Heintzelman, chair of UD's Department of Applied Economics and Statistics, said the project will help raise the profile of the department. “This is really in our wheelhouse in terms of the kind of research we do,” Heintzelman said. “It’s a great opportunity for us to be applying research to policymakers, people who are going to use this work to make better decisions as they’re going about their work constructing, managing, and sometimes de-constructing water and related projects.” The researchers hope the web-based platform will play a role in policy and decision-making, helping the Corps make more informed decisions on environmental projects in the future. “One thing I hope is going to come from this is the choices we make today are going to create a better tomorrow. That’s what it is all about” Kecinski said.
#ExpertSpotlight: 10th anniversary of Flint, MI, water crisis beginning
The 10th anniversary of the Flint, MI water crisis marks a pivotal moment in environmental justice and public health awareness. This event matters deeply to the public as it sheds light on systemic failures in infrastructure management, government accountability, and the disproportionate impacts of environmental hazards on marginalized communities. Here are several sub-topics that could be of interest to a broad audience: Health Impacts and Long-term Consequences: Explore the lingering health effects on residents exposed to lead-contaminated water, including neurological disorders, developmental delays, and mental health challenges. Government Response and Accountability: Investigate the role of local, state, and federal authorities in addressing the crisis, including accountability measures taken against officials responsible for the negligence and mismanagement. Community Resilience and Activism: Highlight the resilience of Flint residents and grassroots organizations in advocating for clean water access, demanding justice, and implementing community-led solutions. Infrastructure Challenges Nationwide: Examine the broader implications of Flint's water crisis on infrastructure investment, maintenance, and regulation across the United States, particularly in aging urban areas. Policy Reforms and Prevention Efforts: Discuss policy reforms enacted post-crisis to prevent similar incidents, such as improvements in water quality testing, infrastructure upgrades, and measures to ensure environmental justice. Legacy of Environmental Injustice: Analyze the broader socio-economic factors contributing to environmental injustices like the Flint water crisis, including racial disparities in access to clean water and the intersectionality of poverty and environmental hazards. This anniversary presents an opportunity for journalists to revisit the ongoing repercussions of the Flint water crisis, amplify the voices of affected communities, and advocate for sustainable solutions to prevent similar tragedies in the future. Connect with an Expert about the Flint, MI water crisis: To search our full list of experts visit www.expertfile.com Gerald Kauffman Project Director, Water Resources Center, Institute for Public Administration; Assistant Professor, Biden School of Public Policy and Administration · University of Delaware Viviane Yargeau Professor, Department of Chemical Engineering · McGill University Jared L. Cohon University Professor · Carnegie Mellon University Joe Brown Assistant Professor, Environmental Engineering · Georgia Tech - COE For journalists with questions or looking to cover the streaming wars, here is a select list of experts. Photo Credit: Bruno Guerrero
Solving sargassum: Florida Tech researchers exploring ways to make seaweed useful
Sargassum, a type of large brown seaweed, has been in the news lately, with a massive blob that’s visible from space and threatening ocean life. University research funded by the U.S. Environmental Protection Agency could address the issue, while also helping solve another problem in our water. Toufiq Reza, an assistant professor of chemical engineering in the Department of Biomedical and Chemical Engineering and Sciences, along with research students Cadianne Chambers, Swarna Saha, Savannah Grimes and Josh Calhoun, were part of the research paper, “Physical and morphological alteration of Sargassum‐derived ultraporous superactivated hydrochar with remarkable cationic dye adsorption.” The paper was published in the May edition of Springer Nature’s Biomass Conversion and Biorefinery journal. The paper is part of a three-year, nearly $400,000 EPA grant to examine different uses of sargassum. It explains that the team can produce biochar from sargassum that can filter water. Though the team has tested model dye in this paper, they plan to extend their research for other applications including harmful algal bloom remediation and nutrient recovery in the future. While sargassum has been around for centuries (Christopher Columbus is credited with the first written account after he encountered it in 1492), and you’ve probably seen bits of brownish seaweed on the beach – it sometimes smells like rotten eggs – the quantities in the ocean and washing up on shores are a more recent phenomenon. There are multiple reasons behind the increased amount of sargassum, including global warming that intensifies sargassum production and nutrient runoff making its way to ocean water and overfertilizing the seaweed growth. More sargassum is expected to show up on Florida shores in the future, inspiring the team to explore more positive uses of the abundant seaweed. “In the next couple of years, we’ll be seeing much more sargassum coming into our way. It’s not a common practice to utilize sargassum,” Reza said. “We go to a beach and then we see a little bit of sargassum just dried out. That doesn’t bother us that much, but when it started to come as a foot-tall sargassum wave, that’s where it gets more alarming.” Sargassum in the lab is labor intensive. Because it contains salt from the ocean, it is washed with tap water first, then put in a freezer for preservation. Next, it goes through hydrothermal carbonization, a thermochemical process that uses heat and pressure to convert biomass and organic waste (such as the sargassum being used) into solid hydrochar. Lastly, the solid char goes through pyrolysis, where it is heated in a high-temperature, oxygen-free chamber into a biochar that is used to filter water. For Swarna Saha, a first-year doctoral student, her goal as a researcher is to identify an environmental problem and come up with a sustainable solution. Having grown up in Bangladesh around textile factories that generate dyes that pollute the surface water, she was inspired to work on solutions that improved water quality with biochar. “I came in the project when we were experimenting on dye adsorption and saw how a tiny amount of biochar changes the color of the water,” she said. “For me, seeing the results made me the happiest. When we saw that our biochar is effective, that is the biggest achievement for me. That made me happy.” Cadianne Chambers, a second-year doctoral researcher, was motivated by her home country of Jamaica and its massive issues with sargassum. Chambers has heard accounts of fishermen unable to go out to sea because of the sargassum buildup. A popular destination for summer vacation, Jamaica is facing serious environmental and economic problems with waves of sargassum. “A team in Jamaica saw that article and they reached out to us, and they’re trying to cultivate sargassum. They want us to teach them how to make export-quality hydrochar and biochar, which could help solve their environmental problem and generate revenues,” Chambers said. “So, everything is just connecting nicely and I’m hoping to continue our collaboration with them. If it’s something that I can go home and put my PhD research to work and help the community, that would be really satisfying.” Looking to know more about sargassum and the ground-breaking research taking place at Florida Tech? Then let us help with your coverage and questions. Toufiq Reza is an assistant professor in the biomedical and chemical engineering and sciences department at Florida Tech. He's available to speak with media about this topic - simply click on his icon now to arrange an interview today.
Georgia Southern University has established a new research and outreach center, the Institute for Water and Health, to investigate the complex interactions between water and human activities, and protect and restore public health in a changing environment. As part of the University’s focus on public impact research, the center will foster collaboration among scientists, government agencies, industry, nonprofit organizations and communities. Coastal Georgia is the perfect location for such an institute to conduct interdisciplinary research because it lies at the intersection of many social, economic and ecological issues. The center supports the region through research, workforce training for students, and actively involving communities in water resource management decision-making process, said Asli Aslan, Ph.D., associate professor in Georgia Southern’s Jiann-Ping Hsu College of Public Health Department of Biostatistics, Epidemiology and Environmental Health Sciences. Now also director of the Institute for Water and Health, Aslan is a water microbiologist, and her research program bridges ecosystem and human health. She has ongoing funded projects on tracking sources of water pollution and assessing health risks associated with exposure to chemical and microbial contaminants. She works with local communities and nonprofit organizations to encourage water stewardship behaviors. Aslan has served in various federal and state agencies and organizations as an adviser, reviewer, scientific committee member and affiliated faculty. She is also the founder and currently the co-chair of the Water and Health Committee of the American Public Health Association. “We want to create a nationally recognized institution that provides meaningful solutions for community needs,” said Aslan. “Our immediate plan is to develop a coalition with all stakeholders in the region to address issues related to increased water demand, impact of sea-level rise on water resources, and potential emerging contaminants in our urban and rural water infrastructure. We are in the process of establishing a community advisory group consisting of scientists from academic institutions, representatives from local and state governments, community leaders, non-profit organizations and businesses to identify and prioritize community needs in water research and education.” For example, she said, although one in every six households in Georgia has a private well, few residents realize any water testing, treatment or well maintenance is the sole responsibility of the property owner as per the Safe Drinking Water Act. Aslan said the Institute for Water and Health will work with the homeowners to help them recognize potential risks and provide solutions that will keep families safe in the long term. “We also look at sources of contaminants using state-of-the-art-methods. And if you know where the pollution is coming from precisely, it’s easier to go fix that problem once and for all, which has a direct impact on the decision-making process to protect water resources.” she said. These new techniques allow researchers with the institute to provide test results within a few hours, which helps end-users to be informed the same day instead of days where most water testing methods currently take about 48 hours. The implications of these methods are broad, as they can be used to identify pathogens in storm water or in household drinking water pipes; assess how new sustainable water treatment technologies efficiently remove contaminants, or provide same-day results for recreational beach monitoring. “We can do all this fancy research in the lab, but it will be very important for us to go out into the community and talk to people, ask them what their immediate needs – our goal is to involve communities from the very beginning of our research so that we co-develop meaningful solutions that will improve the quality of their everyday lives,” Aslan said. “Our group at Georgia Southern consists of established researchers from multiple disciplines such as environmental education, public health, social and behavioral sciences, environmental and computational engineering, coastal ecology, and we are growing everyday”. Carl L. Reiber, Ph.D., Georgia Southern’s provost and vice president for academic affairs, said the center will pull together faculty from across the University, many of whom have already established themselves as water experts within their own discipline. He expects the center to take a very visible role for the University and is renovating space in Savannah near the Armstrong campus to house the center and its labs. “The Institute for Water and Health will bring to southeast Georgia an awareness of the importance of water quality, water management and how tightly these areas are aligned with our health,” Reiber said. “The public impact of this institute is immeasurable and will ultimately increase the quality of life in our community.” If you're a journalist looking to know more about this topic or are looking to cover - then let us help. Asli Aslan, Ph.D., is a water microbiologist, and her research program bridges ecosystem and human health. She has ongoing funded projects on microbial source tracking, health risk assessment of water resources, and the ecology of pathogens in the aquatic environment. She is available to speak with reporters – simply click her icon now to arrange an interview today.
Rensselaer Experts Available To Discuss Federal Infrastructure Proposal
Federal lawmakers are discussing sweeping infrastructure improvements to transportation, manufacturing, and digital infrastructure, among other projects. Researchers at Rensselaer Polytechnic Institute, the country’s first technological research university, are leaders in improving the sustainability, safety, and performance of transportation systems, energy systems, and wireless networks, among other areas. Experts in civil and environmental engineering, electrical engineering, and mechanical engineering are available to discuss what impact large-scale infrastructure projects could have on a multitude of systems that impact people across the country. Improving Transportation and Freight Systems: José Holguín-Veras, the director of the Center for Infrastructure, Transportation, and the Environment at Rensselaer, and Cara Wang, an associate professor of civil and environmental engineering at Rensselaer, are leading experts on the role of infrastructure on freight systems and transportation, and the environmental impacts of both. Their research focuses on improving transportation and freight systems in order to increase efficiency, reduce traffic congestion and, in turn, reduce vehicle emissions. Professors Holguín-Veras and Wang are available to discuss the ways in which improved roads, bridges, railways, and ports could affect shipping and delivery of goods, congestion in cities, and emissions in the environment. They can also discuss what their research has uncovered that could guide policymakers as new projects are planned. Expanding Broadband: Alhussein Abouzeid, a professor of electrical, computer, and systems engineering, is an expert in networked systems, the smart grid, and the Internet of Things. Some of his research focuses on modeling wireless networks, as well as wireless spectrum and policies to optimize its use. Koushik Kar, also a professor of electrical, computer, and systems engineering, researches communication networks, particularly modeling, analysis, and optimization of the internet and wireless networks. Both researchers are available to discuss the ways in which digital infrastructure can meet future needs. Next-Generation Manufacturing: Part of the President’s infrastructure plan would allocate $300 billion to manufacturing. Next-generation manufacturing is a central area of expertise at Rensselaer, with the Institute’s Manufacturing Innovation Center and the Rensselaer Manufacturing Innovation Learning Lab. Faculty and staff from both state-of-the-art centers, including John Wen, the head of the Department of Electrical, Computer, and Systems Engineering, who is an expert in robotics, are available to discuss the role that Rensselaer research plays in preparing the manufacturing sector for the nation’s current and future needs. Upgrading Electric Grid, Investing in Clean Energy: Joe Chow, Jian Sun, and Luigi Vanfretti, all professors in the Department of Electrical, Computer, and Systems Engineering, hold extensive expertise in modeling, monitoring, and optimizing the electric power grid. Their work will be integral to the development of a cleaner, more resilient power grid, especially as clean energy sources are increasingly integrated. Christopher Letchford, the head of the Department of Civil and Environmental Engineering, is a global expert in wind engineering. His expertise includes wind power modeling, wind climatology, and the impacts of climate change on infrastructure, transportation, and energy production. Each of these experts is available to discuss the importance of upgrading the nation’s electric grid, and the move toward clean and renewable energy. Boosting Electric Vehicle Numbers: Part of President Biden’s plan focuses on increasing the number of electric vehicles on the road. A key component of improved and more cost-efficient electric vehicles is greener, cheaper, more efficient, and longer-lasting batteries. Nikhil Koratkar, an endowed chair professor of mechanical engineering, is a leading expert in energy storage technologies. He has dedicated his research to improving the batteries that society already uses, while also developing batteries of the future. He can discuss current battery technology and how advancements in energy storage research could help put more electric vehicles on United States roads. Upgrading Water, Wastewater, and Stormwater Systems: Chip Kilduff, an associate professor of civil and environmental engineering, is an expert in managing water quality and water treatment. He has a particular focus on water treatment approaches like membrane and adsorption-separation processes. Kilduff is available to discuss the importance of upgrading water and wastewater systems and what his research has uncovered about the best methods for managing water quality.
Dr. Bryan Brooks, Ph.D., Distinguished Professor, Environmental Science and Biomedical Studies, examines water quality, environmental health & contaminants, and sustainability issues, particularly in rapidly urbanizing areas. He has published water-quality research specifically regarding the Dickinson and Buffalo bayous in the Houston area, as well as the Houston ship channel. He's available to speak on: * Status of surface water contamination * Associated risks to people and ecosystems in the Houston/Galveston area * What information is needed to prioritize interventions and restoration activities * Implications for system recovery and management Source:
