CEIE Success Stories

Mushrooming feats of engineering success

Rena Malai — Tue, 24 Oct 2023 13:12:44 +0000

Mushrooming feats of engineering success Rena Malai Tue, 10/24/2023 - 09:12

In This Story

It’s important not to crowd mushrooms in a pan, otherwise they won’t cook properly, according to well-known American chef Julia Child. But Child likely didn’t realize that those mushrooms crowded together can accomplish impressive feats of engineering within concrete structures.

Xijin “Emma” Zhang, assistant professor in civil engineering at ��AV, is working on exploring the use of fungi spores within infrastructures. The practice is relatively new, and Zhang is the first professor within Mason’s Sid and Reva Dewberry Department of Civil, Environmental, and Infrastructure Engineering to work on incorporating fungi materials for sustainable building purposes.

“The research I’m very passionate about is exploring how to utilize natural resources to solve challenges within civil engineering,” Zhang said. “Although I am not a biologist, studying these natural solutions to engineering can help make complex solutions to infrastructure challenges simple.”

In Zhang’s research, the fungal fibers that make up the "stem" part of the mushroom get mixed into the concrete mixture before the building process starts. If cracks later generate within the concrete structure, the air and moisture seeping through the cracks activate the fungi spores. The fungi fibers ‘bloom’ and produce chemical minerals. The strong fungal fibers and the chemical minerals help heal the cracks.

“The healing of the cracks is facilitated by the growth of the fungal fibers and the fungi’s productions of chemical minerals,” Zhang said. “This self-healing technology saves expensive and timely repairs to the structures.”

The fungi’s hydrophobic surface means just that—it repels water. This additional benefit prevents water from infiltrating concrete, deterring water-related distresses and improving the durability of the infrastructure.

Zhang is working on cultivating different fungi spores and testing what works best, as not all classes of fungi would necessarily work for cracks. She has discovered the fungi spores within oyster mushrooms have resilient fibers and can be developed to provide excellent properties in thermal insulation, while being safe for human beings to come in contact with.

She sees Mason as a hub of rich resources in research, collaboration, and connections. Being fairly new to the College of Engineering and Computing, Zhang is excited to partner with fellow colleagues in various fields, who are also interested in exploring the uses of fungi as a solution, beyond civil engineering.

“Fungi have many unknown properties, and I’m looking forward to exploring these types of green technology solutions,” she said. “If anyone is interested in joining me to collaborate, I hope they will reach out.”

Zhang can be reached at xzhang50@gmu.edu.

Topics

civil and infrastructure engineering

CEIE Success Stories

Research

CEC faculty research

Cool lessons from Utqiaġvik, Alaska

Rena Malai — Wed, 23 Aug 2023 17:21:32 +0000

Cool lessons from Utqiaġvik, Alaska Rena Malai Wed, 08/23/2023 - 13:21

This summer, computer modeling and the Arctic ecosystem converged at the top of the world. Professor Elise Miller-Hooks and a team of National Science Foundation (NSF) researchers convened at the Barrow Arctic Research Center. These NSF Navigating the New Arctic researchers traveled to the remote location to attend the Permafrost and Infrastructure Symposium in Utqiaġvik, Alaska, some 320 miles north of the Arctic Circle.

The symposium brought together scientists, regional planners, village leaders, project managers, and federal and local policy makers. The team attended to learn and grow their research–and to share. Miller-Hooks described what she learned as massive.

“It was nothing like I expected. When I entered Utqiaġvik, I found myself in a tough environment with mostly dirt roads. The other researchers told me these roadways are built on permafrost,” she said. “Later on, they convinced me to lower myself into a cave underground to see 16,000-year-old permafrost.”

Elise Miller-Hooks analyzes permafrost in Utqiaġvik.

The people of Utqiaġvik live on the permafrost and they still fish and whale in the surrounding seas, as they have for centuries. Whaling is not a hobby, or for profit. They whale to survive. It is their food supply and more.

“It [whaling] is their culture. It is what they raise their kids to do. It's what their songs and dances are about. It's truly everything. They say that if you take that away from them, it's like killing them,” said Miller-Hooks. All of this could be threatened by more shipping traffic as the polar ice caps shrink and Arctic sea ice diminishes.

Most of the researchers at the symposium were there to study the permafrost which is thawing because of human-made climate change; when the permafrost thaws, the land under the structures that have been built on it sinks. Miller-Hooks described the situation as the base falling out from under them and said that they need to find solutions now, not tomorrow. With very limited access to materials, finding a solution is especially challenging.

Miller-Hooks’ research focuses on forecasting and modeling shipping and maritime transportation changes that will come as the permafrost thaws and the sea-level rises. She said she doesn’t get out in the field much in her line of work but found the experience life changing.

“What I learned from the community and tribal leaders was invaluable. I learned that they really want co-production. They want to be heard. They want us to understand what they know and bring it into our research. We must not ignore their experience and try to push research findings on them, but instead, learn together and jointly develop solutions.”

This idea crystalized after Miller-Hooks presented her research at the symposium. After her presentation, one of the village leaders expressed concern and skepticism about the math.

He said he thought she was looking at the wrong thing. He told her that more shipping in the Arctic would harm the whales and could harm whaling.

Miller-Hooks explained that her research creates the tools that can help forecast changing Arctic traffic, and how these projections and analyses can be used to help make cases to mitigate the impact on the whales and their breeding, other marine life, whale hunting, and indigenous people’s subsistence way of life.

“Now I have a much better understanding of the power of the results that we will get, and how they can be used from many new angles that I hadn't thought of,” she said. Miller-Hooks hopes to collaborate with the communities and work with them to uncover how increased maritime traffic and related industrial activity in the region will impact their way of life, and how the U.S. and other Arctic nations can prepare to do the right thing.

Research Sponsors: Funding for the symposium came from the NSF Arctic Sciences program, the U.S. Department of Transportation's Center for Safety Equity in Transportation, and UIC Science, a subsidiary of the Ukpeaġvik Iñupiat Corporation providing logistical support to scientists and researchers working in Alaska's Arctic.

In This Story

Elise Miller-Hooks

Delve deeper into Mason's research in the Arctic

Learn more about research at Mason

Topics

Climate Research

Research

Institute for a Sustainable Earth (ISE)

College of Engineering and Computing

National Science Foundation

Sustainability Research

global climate change

CEIE Success Stories

CEC faculty research

CEC Global Engagement

Assessing climate change costs on careers and coastal communities

Nathan Kahl — Tue, 30 May 2023 16:30:26 +0000

Assessing climate change costs on careers and coastal communities Nathan Kahl Tue, 05/30/2023 - 12:30

In This Story

Celso Ferreira

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Coastal communities worldwide are seeing stronger storm surges, more powerful waves, and potential devastation for homes, infrastructure, jobs, and a way of life. Celso Ferreira, an associate professor in the Sid and Reva Dewberry Department of Civil, Environmental, and Infrastructure Engineering at the ��AV College of Engineering and Computing, studies the impacts of these threats and suggests ways to manage them.

In May 2023 he co-authored a paper, Jobs at Risk: Sea Level Rise, Coastal Flooding, and Local Economies. “This study is the first to evaluate potential future impacts of flooding from sea level rise and climate change to people’s jobs and incomes. This new methodology provides a more equitable analysis of the impacts of climate change and a vision into its potential implications for the region,” said Ferreira.

According to the study, approximately 263,500 jobs and $11.1 billion in wage income will be threatened by 100-year flooding in the Chesapeake Bay region by 2050. The nonprofit Resources for the Future, with whom Ferreira co-authored the paper states, “These (jobs) figures represent 3.3 and 5 percent of all jobs in the Chesapeake region now and in 2050, respectively. The study also identified several flooding ‘hot spots’ around the region—counties and cities in Maryland and Virginia where 25 percent or more of jobs are flood-exposed.”

“Working with MDDNR and TNC allows our research to directly impact decision-making at the state and local level. It has been a tremendous experience to see our research translated for stakeholders so they can benefit from the science that Mason is producing.”

In addition to quantifying the economic impact, the paper recommends ways to prepare for it. The recommendations include aiming government spending at developing areas outside current and future flood zones; giving coastal communities financial aid but with the condition that businesses are in areas with limited exposure to flooding; providing aid to enterprise zones that incorporates requirements for resilience, such as infrastructure changes to reduce potential flood damage; using FEMA dollars to relocate businesses to different areas within their existing community but out of flood zones; and encouraging communities to change zoning rules to account for climate change.

Ferreira visits the Chesapeake Bay to study the impacts of climate change

In a related project with The Nature Conservancy (TNC) and the Maryland Department of Natural Resources (MDDNR), Ferreira and colleagues are assessing the ability of tidal wetlands, marshes, and sea grass beds to absorb storm surges and waves, protecting developed areas.

Ferreira says, “We place sensors that measure wave energy across the coastal habitats during extreme coastal storms, capturing unique data documenting its flood protection capacity. We then use computer models to predict future scenarios through 2100, with different projections of sea level rise focusing on coastal flood protection. We are looking at how will these ecosystems provide coastal protection into the future.”

These coastal barriers are essential to absorbing destructive storm surges. The first few feet of tidal marsh can reduce wave energy by 90 percent, according to TNC. In addition, marshes can trap tidal water sediment, allowing them to grow naturally with sea level rise. “Living” shorelines improve water quality while creating a habitat for fish and increasing biodiversity.

Nicole Carlozo of MDDNR says, “The data collected will help us make better decisions about where to restore and protect coastal habitats and make decisions about coastal restoration strategies. For example, how wide does a marsh need to be, to provide protection benefits.”

Researchers believe that their findings will provide input for statewide models to understand how habitats will transition as sea levels rise, allowing Maryland to make strategic decisions about anticipating and responding to such changes.

Topics

Climate Change

coastal habitats

Chesapeake Bay

civil and infrastructure engineering

environmental engineering

Research

CEIE Success Stories

CEC faculty research

New lab closes the loop on water sustainability

Anonymous — Mon, 06 Dec 2021 18:47:56 +0000

New lab closes the loop on water sustainability Anonymous (not verified) Mon, 12/06/2021 - 13:47

In This Story

Kirin Emlet Furst

The water that pours out from your kitchen faucet goes through a lot to make it to your home. Assistant Professor Kirin Emlet Furst wants to use her new high-tech Water Systems Chemistry Lab at the Potomac Science Center to close the loop on water and increase the efficiency of those processes by taking a systems approach.

Kirin Furst (pictured) says that the new equipment in her lab makes their work studying water from different angles possible and accurate. Photo by Evan Cantwell.

Furst, a faculty member in the Sid and Reva Dewberry Department of Civil, Environmental, and Infrastructure Engineering, believes a systems approach is the best way to solve the world’s safe water problems. “Our research lab is primarily focused on removing organic contaminants in drinking water systems and potable reuse systems,” says Furst.

The water treatment process has many steps: source water protection, water treatment, the distribution of the water, and what people are actually exposed to in their homes. “A lot of researchers and research labs focus on one of these processes, but we have projects that touch each part of the water system,” Furst says.

Furst’s main research interest is in reducing disinfection byproducts caused by reactions between dissolved organic materials and water disinfectants. The disinfectants used in water are essential to preventing water-borne pathogens, but when they react with materials that remain in the water, they can create toxins that have numerous health effects.

“To solve the disinfection byproducts problem, we have to look at the bigger picture. It’s hard to test their effects, and there are dozens of opportunities for these toxins to be introduced, so we can’t look at one stage in the process,” she says.

Furst and the graduate and undergraduate students in her lab are also working on ways to increase affordable water treatment methods for low-income areas and increase the treatment and reuse of wastewater. In addition, some of her graduate students are looking into creating new types of filters, others at reducing phthalates.

The advanced equipment in her lab gives her and her students the ability to tackle numerous parts of the water treatment systems, says Furst. And she is looking forward to the new and innovative projects her undergraduate and graduate students will take on.

Topics

Civil Engineering

Sustainability

water quality

environmental engineering

CEIE Success Stories

CEC faculty research