Solving sargassum: Florida Tech researchers exploring ways to make seaweed useful

Jun 21, 2023

3 min

Toufiq Reza, Ph.D.

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.

Connect with:
Toufiq Reza, Ph.D.

Toufiq Reza, Ph.D.

Assistant Professor | Biomedical and Chemical Engineering and Sciences

Dr. Reza's research interests involve converting wastes to biofuels.

Biomass ConversionWaste ValorizationWaste to EnergyBiomaterialsBiofuels

You might also like...

Check out some other posts from Florida Tech

3 min

Global Technology Outage Raises Concerns About Ease of Future Cybersecurity Attacks

The world came to a standstill after a technology outage reported Thursday evening grounded airplanes, disconnected hospitals and shut down banks across the globe. A faulty software update was to blame, not cybercriminals, but Florida Tech assistant professor TJ O’Connor said the outage’s cascading effect points to larger concerns about our society’s reliance on the internet. The outage, which affected users’ ability to access Microsoft 365 applications, was traced back to a defect found in a software update from cybersecurity company CrowdStrike. CrowdStrike quickly released a statement confirming that the outage was “not a security incident or cyberattack.” The outage was nonetheless damaging, kicking institutions offline. Issues remained more than a day later. “Once those services go down, there’s this massive cascading effect,” O’Conner said. “If bank processing doesn’t work, then aviation doesn’t work. If aviation doesn’t work, shipping doesn’t work.” Ultimately, O’Connor explained, the biggest concern isn’t the glitch in the system; it’s the number of systems that broke because CrowdStrike wasn’t working. “I think what we’ll see a lot of people learn from this CrowdStrike incident is…that if they want to take the internet down in the future, all they have to do is hit one target,” O’Connor said. “It makes the threat landscape a lot smaller to attack for an adversary.” Over the course of several hours, a blue Microsoft error screen taunted companies worldwide. Airlines including Delta, American and Frontier grounded all flights. Several television news outlets, including the United Kingdom’s Sky News, were unable to hold live broadcasts. Some of the biggest concerns lie in the hospital industry, where planning, evaluation and continuous monitoring are essential, O’Connor noted. “[Hospitals] are constantly processing so much data, and for them to go out for a couple of hours means that decisions aren’t being made on an automated basis,” O’Connor said. “We’ve kicked over so much of our decision making to automated systems that we can’t let those networks fail.” According to the United Kingdom’s National Health Service (NHS), the outage disrupted its appointment and patient record system. Mass General Brigham in Boston, Massachusetts was also one of several U.S. hospitals that cancelled non-urgent surgeries, procedures, and medical visits because of the disruption. 911 outages were also reported in several states, including Phoenix, Arizona, whose computerized dispatch center was affected, the police department posted on social media. In Portland, Oregon, Mayor Ted Wheeler issued a citywide state of emergency due to the outage’s impact on city servers, computers and emergency communications. Although CrowdStrike confirmed the incident was not malicious, O’Connor said it raises questions about overall reliance on the internet to make decisions, as well as ineffectiveness in securing it. “We continually have these wake-up moments where something happens, it’s large scale, it’s a news blip, and then we forget about it… but our adversaries don’t,” O’Connor said. “Unfortunately, the attack infrastructure and the ability to attack is getting easier and easier.” O’Connor also expects future network attacks to get worse, calling the unstable global environment a “national-level issue to address.” While large-scale attacks and outages are mostly out the individuals’ control, O’Connor said, people can take action to protect themselves from personal cybersecurity attacks by using multi-factor authentication as much as possible. Looking to know more?  Dr. TJ O’Connor’s research is focused on cybersecurity education, wireless protocols, software-defined radio and machine learning. If you're looking to connect with Dr. O'Connor - simply click on his icon now to arrange an interview today.

1 min

New Images from Euclid Telescope Offer Powerful Complement to Hubble, JWST

Five new images from the European Space Agency’s (ESA) Euclid space telescope mission continue to further our exploration of the “Dark Universe,” according to Florida Tech observational astrophysicist Eric Perlman. With help from NASA’s Jet Propulsion Laboratory, Euclid’s mission is to grow our understanding of “dark matter” so scientists can precisely chart its presence in the universe. Photo Credit: ESA/Euclid/Euclid Consortium/NASA Euclid returned its first five images in November 2023 after launching from Cape Canaveral, Florida – just minutes from the Florida Tech campus – that summer. Now astronomers and scientists are examining a new batch released in late May. The five new images feature a star-forming region in the Milky Way galaxy, clusters of hundreds of galaxies and more stunning sights. “These are magnificent images which showcase the power of the Euclid telescope,” said Perlman, who is a professor at Florida Tech’s Department of Aerospace, Physics and Space Sciences. “The view they show of these objects is strikingly different from what other observatories, in particular Hubble and JWST, show.” NASA predicts that by 2030, Euclid will create a cosmic map that covers almost a third of the sky, thanks to the field of view that is wider than both the Hubble Telescope and the James Webb Space Telescope (JWST). Photo Credit: ESA/Euclid/Euclid Consortium/NASA Dr. Perlman is available to discuss the new images, how and why they differ from previous images, and what this means for our understanding of dark matter.

2 min

Ready for takeoff! The Starliner is set for its first mission to the ISS

Since 2011, any American astronaut looking to get to or from the International Space Station (ISS) had to lift off from the Baikonur Cosmodrome, a spaceport operated by Russia within Kazakhstan. It was the only way to get up into space - for now. It's why almost a decade ago private sector companies Boeing and SpaceX were engaged by NASA to develop a new way to get to the ISS from American soil.  All of that is about to change, and all eyes have been on Boeing's Starliner as it readies to take flight with a crew for the first time. Florida's Tech's Don Platt , the Director of the Spaceport Education Center, has also been busy as the media coverage has been intense. “In this case, NASA is truly buying a service and it’s up to the company to get it all right. With just some oversight," said Don Platt, of Florida Tech. Starliner rolled out to Launch Complex 41 in the early morning on Tuesday. It will be positioned atop a ULA Atlas 5 rocket for the planned liftoff on May 6 from the Cape Canaveral Space Force Station. As Platt explained, Starliner is a critical second option for NASA. “With all the success of SpaceX has had recently, we can’t simply rely on SpaceX to provide all services to the American space program," Platt said. This is the first flight of Starliner with a crew onboard so it’ll be the first time for it to fly in this configuration. During these test missions, there are always lessons to be learned. “We are all aware of some of the issues the Boeing company has experienced in the last couple of years. And to have a successful test flight here with astronauts onboard is a definite plus from PR aspect,” Platt said. Two seasoned NASA astronauts will be the first to take a ride in Starliner up to the ISS; Suni Williams and Barry “Butch” Wilmore. They’ll be up there for eight days on this test mission and if all goes well, the first Starliner mission on NASA crew rotation up to the ISS will come next spring. -- April 16 - NBC News Getting to the ISS, Moon and even Mars are getting a lot of attention lately. If you're a journalist look to cover the topic, let us help. Dr. Don Platt's work has involved developing, testing and flying different types of avionics, communications, rocket propulsion systems as well as astrobiology/biotechnology systems and human deep space exploration tools. Don is available to speak with media anytime. Simply click on the icon below to arrange an interview today.

View all posts