RegenerativeMedicine.net

In Search of a Greener Cleaner

Pitt researchers awarded $300K by NSF to identify environmentally sustainable chelating agents.

Molecular chelating agents are used in many areas ranging from laundry detergents to paper pulp processing to precious metal refining. However, some chelating agents, especially the most effective ones, do not degrade in nature and may pollute the environment. With support from the National Science Foundation (NSF), researchers at the University of Pittsburgh Swanson School of Engineering are developing machine learning procedures to discover new chelating agents that are both effective and degradable.

John Keith, PhD, a Richard King Mellon Faculty Fellow in Energy and assistant professor of chemical engineering at Pitt, is principal investigator; and McGowan Institute for Regenerative Medicine affiliated faculty member Eric Beckman, PhD (pictured), Distinguished Service Professor of chemical engineering and co-director of Pitt’s Mascaro Center for Sustainable Innovation, is co-PI. Their project titled “SusChEM: Machine learning blueprints for greener chelants” will receive $299,999 from the NSF.

“Chelating agents are molecules that bind to and isolate metal ions dissolved in water,” explains Dr. Keith. “Cleaning detergents normally don't work well in hard water because of metal ions like magnesium and calcium interfering. That’s why commercial detergents typically include some chelating agents to hold up those metal ions so the rest of the detergent can focus on cleaning.”

While chelating agents are valued for their ability to bind strongly to different metal ions, researchers are also factoring how long it takes them to degrade in the environment and their probabilities of being toxic when searching for more effective chelate structures. “Many of the widely used chelating agents we use end up in water runoffs, where they can be somewhat toxic to wildlife and sometimes to people as well,” says Dr. Beckman.

Developing new chelating agents so far has relied on trial and error experimentation. Dr. Beckman continues, “In the past, folks have tried to create better chelating agents by tweaking existing structures, but whenever that produces something less toxic, the chelating agent winds up being much less effective too. We’re trying a new approach that uses machine learning to look through much larger and more diverse pools of candidate molecules to find those that would be the most useful.”

The Pitt research team will use quantum chemistry calculations to develop machine learning methods that can predict new molecules that would be more effective and greener than existing chelating agents. While computational quantum chemistry can be used to screen through a thousand hypothetical chelating agents in a year, machine learning methods based on quantum chemistry could be used to screen through 100,000s of candidates per week. Once the researchers identify promising candidates, they will synthesize and test them in their labs to validate the efficacy of the machine learning process for designing greener chemicals.

The results of the research will have a significant impact on a range of topics relevant to environmentally-safe engineering and the control of metals in the environment, including computer-aided design of greener chelating agents used in detergents, treatments of heavy metal poisoning, metal extractions for soil treatments, waste remediation, handling normally occurring radioactive materials from hydraulic fracturing sites, and water purification.

“Chelating agents are used in such a wide range of industries, so even a small improvement can have a big impact on sustainability as a whole,” said Dr. Keith.

Illustration: McGowan Institute for Regenerative Medicine.

Read more...

University of Pittsburgh Swanson School of Engineering News Release (09/18/17)

Bio: Dr. Eric Beckman

Thursday - February 22, 2018

U.S. News
Dealing with Diastasis Recti Study Suggests Way to Attack Deadly, Untreatable Nerve Tumors Clock Protein Controls Daily Cycle of Gene Expression by Regulating Chromosome LoopsWorld News
I'm on business ondansetron 4 mg dosage for child A Ukrainian military spokesman said six of his troops were killed in attacks by separatists in 24 hours of clashes I'm interested in this position fat burner maximum strength nutravita ambassador was killed, and sent letters to internet companies telling them to protect relevant documents. Have you got a telephone directory? voveran mr The agents also died in the shootout, and Nelson’s naked corpse was found the next day in a ditch next to a cemetery Regenerative Medicine Journal
Rev-erbα dynamically modulates chromatin looping to control circadian gene transcription A vitamin B12 conjugate of Exendin-4 improves glucose tolerance without associated nausea or hypophagia in rodents Daple coordinates organ-wide and cell-intrinsic polarity to pattern inner-ear hair bundlesPoint Of View
I sing in a choir decadron side effects in elderly The second challenge included selling wedding dresses, with both teams raising nearly $600,000 for charity What university do you go to? avodart cost cvs The instruments of his success, or failure, are gathered up so tightly in Hoffman’s clasp, you get white knuckles just looking at him. We used to work together grid map Animals were electrocuted, gassed and beaten to death for Kim’s fashion whims