Air Quality

ME undergraduate student works to address methane crisis in summer project

Alexander James Servantez — Fri, 29 Aug 2025 18:06:04 +0000

ME undergraduate student works to address methane crisis in summer project Alexander Jame… Fri, 08/29/2025 - 12:06

Alexander Servantez

Alex Hansen stepped foot in a landfill this summer for the first time to study the consequences of methane emissions. What he saw sparked a growing interest in climate change research and environmental data analysis.

Hansen, a rising senior in the Paul M. Rady Department of Mechanical Engineering, spent his summer break in ��’s Summer Program for Undergraduate Research (SPUR).

Alex Hansen (right) working alongside graduate student SPUR mentor Gabriela Cortes (left) in the Hannigan Air Quality and Technology Research Lab.

The program aims to increase undergraduate research engagement and interest by pairing nearly 125 engineering students from across the college in research labs with faculty members and graduate mentors. For 10 weeks, students foster unique, hands-on research experiences—like a trip to a landfill in Los Angeles—and develop crucial skills that serve them well beyond their undergraduate journey.

For Hansen, it was a special curiosity that led him to the SPUR program. One that started from a simple conversation.

“I spoke with someone I ran into one day a while back who worked at a landfill. He was telling me how dangerous methane is and how important it is to burn off methane,” said Hansen. “I was just so fascinated by it all. When I saw the project description on the SPUR website, I knew it was something I wanted to learn more about.”

And dangerous is an understatement. Methane, one of Earth’s most potent greenhouse gases, is one of the primary contributors to climate change. Its atmospheric lifespan may be shorter than other greenhouse gases like carbon dioxide, but it can trap significantly more heat per molecule, making it extremely hazardous to human and environmental health.

According to the UN Environment Programme, methane is 80 times more potent at warming than carbon dioxide over a 20-year period. It’s also responsible for nearly 30% of global warming since pre-industrial times and is a key culprit for the formation of ground-level ozone, which causes one million premature deaths every year.

It’s a spiraling issue, but Hansen says his SPUR project titled “Characterizing Landfill Methane through a Low-Cost Ground-Based Sensor Network,” looks to attack the crisis by addressing some of the world’s most prevalent methane emissions sites.

“Landfills are one of the largest emitters of methane in the United States,” Hansen said. “I believe waste is about third for methane emissions across the entire world. If we are able to study a landfill and learn more about the way methane spreads in the atmosphere, maybe we can find a way to make improvements to landfill infrastructure and lower emissions.”

To do this, Hansen and his lab mates in Professor Michael Hannigan’s Hannigan Air Quality and Technology Research Lab started working with a network of 24 low-cost air quality sensors called L-Pods that were deployed across a landfill in Los Angeles at the beginning of 2025.

The L-Pods are equipped with two metal oxide sensors that collect air pollutant data and another sensor that tracks temperature and relative humidity. The data is then stored locally and transmitted to the cloud every 10 seconds for ongoing monitoring.

These unique sensors may not be as individually powerful as the industry-grade technology used by the Environmental Protection Agency (EPA), but they are cheap and efficient. This allows the group the ability to position more sensors across a landfill than they previously could, giving them a precise methane reading that represents a much larger region.

Hansen showcasing the inner workings of an L-Pod air quality sensor.

Hansen spent a majority of his summer SPUR experience helping the team analyze the data gathered from the sensors. But he was able to see the sensors in action firsthand at the Los Angeles landfill where they are deployed.

It was crazy seeing how much trash we make and the operations needed to contain it all,” said Hansen. “And these low-cost sensors were awesome to see, too. We can add so many more positions and measure way more often than traditional measuring devices. It’s super exciting to see the data we collect in real-time and how impactful it is.”

Hansen’s journey through the SPUR program ended with a final presentation at the end of July. It was a chance for him to share his learning and reflect on his summer.

In many ways, he said it was a rollercoaster ride filled with highs and lows. Some seasoned researchers might call that the typical research experience.

But Hansen also said it was valuable and fulfilling. So much so, that he might be eyeing a future career in research.

“Being in the lab was definitely a learning curve at first. Just learning the terminology and trying to get up to speed as quickly as possible was tough,” Hansen said. “But there’s so many opportunities to make a big impact in research. I’ve learned so much from amazing people this summer and I am definitely curious about pursuing research in a master’s program after graduation.”

Rising senior Alex Hansen spent his summer break in ��’s Summer Program for Undergraduate Research (SPUR) studying the consequences of methane emissions. His work analyzing data gathered from unique methane detection sensors can one day help researchers address the methane crisis at some of the world's most prevalent methane emissions sites.

Off

Traditional

White

ME grad student probes industrial pollution in Mississippi neighborhood

Alexander James Servantez — Fri, 25 Jul 2025 21:55:39 +0000

ME grad student probes industrial pollution in Mississippi neighborhood Alexander Jame… Fri, 07/25/2025 - 15:55

Caroline Frischmon is a graduate student leading a critical study documenting industrial pollution near the Cherokee Forest subdivision in Pascagoula, Mississippi. Her findings show that industrial activities are leading to negative impacts on human health and the residents of the neighborhood are looking to take action.

Off

Traditional

White

New study shows road emission policies could save 1.9M lives by 2040

Alexander James Servantez — Thu, 22 May 2025 20:45:25 +0000

New study shows road emission policies could save 1.9M lives by 2040 Alexander Jame… Thu, 05/22/2025 - 14:45

A new global study co-authored by Professor Daven Henze reveals that implementing smart policies that address road transport emissions can improve health outcomes across more than 180 countries and 13,000 urban areas.

Off

Traditional

White

Vance turns her house into lab to study health risks of cleaning products

Alexander James Servantez — Tue, 20 May 2025 19:16:38 +0000

Vance turns her house into lab to study health risks of cleaning products Alexander Jame… Tue, 05/20/2025 - 13:16

Since the start of the COVID-19 pandemic, global spending on household cleaning products have increased by nearly $50 billion. Associate Professor Marina Vance is turning her home into a research laboratory to study and explore the possible implications of the increased product usage on human health.

Off

Traditional

White

People of color breathe Denver’s smelliest air

Alexander James Servantez — Mon, 17 Mar 2025 21:17:27 +0000

People of color breathe Denver’s smelliest air Alexander Jame… Mon, 03/17/2025 - 15:17

A new ��-led study, headlined by Professor Shelly Miller, shows that Denver residents in marginalized areas of the city are more likely to be exposed to odor emitting facilities. However, these communities are also the least likely to report these odors to the city, a statistic that Miller and her colleagues would like to see change.

Off

Traditional

White

Wiedinmyer on the power, importance of NOAA weather forecasting

Alexander James Servantez — Mon, 10 Mar 2025 16:16:26 +0000

Wiedinmyer on the power, importance of NOAA weather forecasting Alexander Jame… Mon, 03/10/2025 - 10:16

Research Professor Christine Wiedinmyer is an atmospheric expert whose research investigates the impact of air pollutants on air quality, climate and public health. In this article by The Conversation, Wiedinmyer gives a behind-the-scenes look at how NOAA forecasters use technology to predict the weather, and how important they are to the fabric of our everyday life.

Off

Traditional

White

Spinout LongPath Technologies to expand methane detection with $162M DOE loan

Alexander James Servantez — Wed, 20 Nov 2024 23:45:31 +0000

Spinout LongPath Technologies to expand methane detection with $162M DOE loan Alexander Jame… Wed, 11/20/2024 - 16:45

Greg Rieker, associate professor of mechanical engineering and co-founder of LongPath Technologies, gathered with others on the �� campus to celebrate a $162.4 million loan package from the U.S. Department of Energy. The loan will help Rieker and LongPath expand methane detection using laser-based quantum devices that scan the atmosphere in real time.

Off

Traditional

White

PhD students earn top National Science Foundation fellowships

Anonymous — Wed, 24 Apr 2024 22:51:12 +0000

PhD students earn top National Science Foundation fellowships Anonymous (not verified) Wed, 04/24/2024 - 16:51

Jeff Zehnder

The National Science Foundation has bestowed three prestigious Graduate Research Fellowship Program awards to �� mechanical engineering graduate students.

The national awards recognize and support outstanding grad students from across the country in science, technology, engineering and mathematics (STEM) fields who are pursuing research-based master’s and doctoral degrees.

PhD students Reegan Ketzenberger, Caleb Song, and Jennifer Wu are each receiving the honor for 2024. Find out more about their research below.

Awardees receive a $37,000 annual stipend and cost of education allowance for the next three years as well as professional development opportunities.

Two mechanical engineering PhD students, Alex Hedrick and Carly Rowe, also received honorable mentions from the National Science Foundation program.

Off

Traditional

White

�� Engineering study finds at least nine pesticide chemicals near Boulder County homes

Anonymous — Thu, 28 Apr 2022 22:41:01 +0000

�� Engineering study finds at least nine pesticide chemicals near Boulder County homes Anonymous (not verified) Thu, 04/28/2022 - 16:41

Rachel Leuthauser

EPA guidance and resources about pesticides

Find 'Minimum Risk Pesticides'

Paul M. Rady Department of Mechanical Engineering researchers have identified at least nine pesticide chemicals in the air around Boulder County homes that humans and their dogs have been exposed to.

The air quality study, led by PhD candidate Aniya Khalili and funded by a �� Outreach Award, tracked the chemicals that people and their dogs came into contact with in fall 2021. The 38 human-dog pairs that participated in the study had to wear wristbands and dog collar clips for a week that contained sampling tubes to measure the pesticides around them.

“We used high-resolution mass spectrometry to analyze the samples," said Khalili. "The results showed that of the 15 compounds we were testing for, we detected nine of them. Three of them were detected in all the human and dog samples.”

The three compounds identified in all 76 samples were n-nitrosodiphenylamine, 4-nitroaniline and 4-chloroaniline. Each of those compounds can be found in pesticides and could pose various health risks including eye, skin and respiratory tract irritation. Very high and repeated exposures may damage the liver and kidneys, according to the EPA.

Mechanical Engineering PhD candidate Aniya Khalili documents the results of her study.

Khalili handles one of the dog collar clips that tracks the chemicals in the air.

“These results could mean that the chemicals are in the air since the 38 people are not living together and have different lifestyles,” said Khalili. “If they are exposed to the same compound, it could say something about the community that we are living in.”

The study also detected DDD in one human and two dogs, and DDT in two humans and one dog, even though the United States has banned the use of both due to damage to wildlife. The EPA has said that "after the use of DDT was discontinued in the United States, its concentration in the environment and animals has decreased, but because of its persistence, residues of concern from historical use still remain."

“The fact that we even have detected DDD and DDT in any of the participants’ samples is a big deal,” said Khalili. “There is a 99% correlation between the dogs and their owners that were exposed to DDD and DDT, and yes, it is a small percentage out of the 38 pairings in the whole study. But we shouldn’t be exposed to those compounds at all.”

Khalili’s study focused on detecting the compounds rather than identifying where they are coming from. She noted the chemicals could have originated from pesticides, dog tick and flea medications, or industrial sources.

Khalili conducted this research after seeing several yellow flags on people’s yards around Boulder indicating that chemicals had recently been applied. She wanted to educate the community about the compounds that are in some of those pesticides and inspire people to live cleaner lifestyles.

Many of the participants have told Khalili that they are already being more conscious about using pesticides around their homes to protect themselves and their dogs. Khalili said she’s proud and excited to see community members taking this next step. Moving forward, she wants to promote even bigger changes.

“I would love to see the regulations around the compounds in these products that we use for gardening be revised,” said Khalili. “It wouldn’t happen overnight. We would need more studies to ensure that policymakers can rely on the results and make a change. I’d like to not see those yellow flags around anymore.”

Khalili partnered with the City of Boulder and Healthy Baby Bright Futures to recruit participants and design the deployment of the study, since the city and organization are well connected with the community. Both collaborators also had a stake in the research, as they were interested in seeing what compounds are in their air.

“It was important to work with the City of Boulder because they could be empowered to make changes to regulations,” said Khalili. “With Healthy Baby Bright Futures, it was an educational opportunity. Our study can help teach mothers to not let their babies crawl on chemically treated grass, for example.”

The air quality study, led by mechanical engineering PhD candidate Aniya Khalili, aims to inspire the community to lead cleaner lifestyles and promote further research on pesticide exposure.

Off

Traditional

White

How does Marshall Fire smoke affect indoor, outdoor air quality?

Anonymous — Fri, 14 Jan 2022 21:30:29 +0000

How does Marshall Fire smoke affect indoor, outdoor air quality? Anonymous (not verified) Fri, 01/14/2022 - 14:30

Professors Michael Hannigan and Marina Vance join scientists from CIRES and NOAA to install instruments in surviving houses to understand the smoke impacts on indoor air quality.

Off

Traditional

White

Air Quality

ME undergraduate student works to address methane crisis in summer project

Off

ME grad student probes industrial pollution in Mississippi neighborhood

Off

New study shows road emission policies could save 1.9M lives by 2040

Off

Vance turns her house into lab to study health risks of cleaning products

Off

People of color breathe Denver’s smelliest air

Off

Wiedinmyer on the power, importance of NOAA weather forecasting

Off

Spinout LongPath Technologies to expand methane detection with $162M DOE loan

Off

PhD students earn top National Science Foundation fellowships

Off

���������� Engineering study finds at least nine pesticide chemicals near Boulder County homes

Off

How does Marshall Fire smoke affect indoor, outdoor air quality?

Off

�� Engineering study finds at least nine pesticide chemicals near Boulder County homes