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1 year ago in Bioremediation , Environmental Chemistry By Kate
Can biological processes transform long-chain PFASs into short-chain PFASs?
The extreme persistence of long-chain PFAS like PFOA is the core of the environmental problem. I'm reviewing bioremediation strategies for my thesis. While chemical degradation methods exist, I'm skeptical but hopeful about biological pathways. Are there peer-verified studies showing specific bacteria or enzymes that cleave those strong C-F bonds to perform a meaningful chain-shortening transformation?
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By Joshna Answered 1 year ago
This is a frontier area where hope meets hard chemical reality. I have reviewed numerous studies, and while we see some biological activity often cometabolic or under specific anaerobic conditions the process is agonizingly slow and rarely leads to complete defluorination. Certain microbial consortia can cleave off carboxyl or sulfonate groups, shortening the chain, but they typically stall at the ultra-stable short-chain PFAS (like PFBA) or trifluoroacetic acid. From an engineering perspective, I would not yet call it an effective "transformation" but rather a partial alteration. The products often remain environmentally mobile and persistent, so the remediation benefit is currently limited.
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