e.: lignin, hair, whey...]
Xenobiotics are compounds that are not formed by natural processes of synthesis.
They are foreign substances to the ecosystem that often have a toxic effect.
Classification of contaminants
PCB, TCE, PCE (polichlorinated).
TNT (explosives, others...).
Cr, Zn, Cd, Pb, Hg.
None of the expensive or harmful compounds, currently used for the abiotic chemical synthesis of Pd nanoparticles, are required because bacteria serve as reductant for the Pd salt and as scaffold for the Pd nanoparticles.