Ocean Plastic Breakdown

From persistent polymers to safe molecules.

Last updated: 2025-10-25

Most ocean plastics fragment but don't fully mineralize. We target catalyzed depolymerization of PET-like polymers into terephthalic acid and ethylene glycol under seawater conditions—safely and measurably.

The challenge is kinetics at low temperatures, salinity effects, and avoiding harmful by-products.

Chemistry in brief

PET contains hydrolysable ester linkages. Enzymatic hydrolysis (PETase/MHETase) or photocatalytic oxidation can reduce polymer mass to monomers.

Rate-limiting factors include crystallinity (χ), accessible surface area, Arrhenius temperature dependence, and salt inhibition.

dMdt=keff(T,S,χ)Aeff[E]\tfrac{dM}{dt} = -k_{\mathrm{eff}}(T,S,\chi)\,A_{\mathrm{eff}}\,[E]
keff(T)eEa/(RT)k_{\mathrm{eff}}(T) \propto e^{-E_a/(RT)}
Schematic: PET film → TPA + EG under enzyme or light.
Schematic: PET film → TPA + EG under enzyme or light.

Why it matters

Turning modeled kinetics into verifiable breakdown certificates lets labs and agencies compare candidates on equal footing—rate, safety, and reproducibility.

Further reading