Kinetics of catalytic oxidation of the potent aquatic toxin microcystin-LR by latest generation TAML activators

Oxidative degradation of cylindrospermopsin and anatoxin-a by FeIII–B*/H2O2

“…The oxidised product formed was expected to have significantly reduced toxicity due to epoxidation of the key moiety that is responsible for the toxic properties of microcystin-LR. 46 In light of this, the Fe III -B*/H 2 O 2 catalyst system showed great potential for CYL and ANA oxidative degradation with products of much reduced toxicity being formed. An understanding of the influence of NOM on cyanotoxin treatment by Fe III -B*/H 2 O 2 is essential to confirm the potential suitability of Fe III -B*/H 2 O 2 in actual water treatment plants.…”

An Iron Macrocyclic Complex Containing Four “Hybrid” Pyridinium Amidate/Amidate N‐Donors as a Catalyst for Oxidations with Hydrogen Peroxide

“…The important reaction steps and associated rate constants for oxidation reactions of this dye using iron-TAML catalysts have been determined and include the key steps of catalyst activation (k I and k -I ), reaction of the activated catalyst with the substrate orange II (k II ), and irreversible catalyst inactivation (k i ; Scheme 5). [40] Verification that the catalytic mechanism shown in Scheme 5, which has been used extensively to describe the iron-TAML catalysed oxidation of organic substrates, [16,20,[41][42][43] is also valid for catalytic bleaching reactions using 1 f was obtained by measuring the dependency of the reaction rate on the concentration of catalyst, orange II, and hydrogen peroxide.…”

The Mechanism of Formation of Active Fe-TAMLs Using HClO Enlightens Design for Maximizing Catalytic Activity at Environmentally Optimal, Circumneutral pH

“…The simplest stoichiometric mechanism of Fe-TAML-catalyzed oxidations by H 2 O 2 in aqueous media is straightforward. , The iron(III) resting state of any Fe-TAML catalyst is activated by an oxidant such as H 2 O 2 (step 1), and the active catalyst formed then attacks an electron donor, S (step 2). If S is a dye, the primary products are usually oxidized fast (step 3), which is typically not the case for more difficult-to-oxidize targets. , [ L Fe III ] 0.25em ( resting state ) + normalH 2 normalO 2 → active 0.25em catalyst 0.25em ( k I ) active 0.25em catalyst + normalS → [ L Fe III ] + primary 0.25em product 0.25em ( k II ) active 0.25em catalyst + primary 0.25em product → [ L Fe III ] + product / normals 0.25em ( fast ) …”

“…If S is a dye, the primary products are usually oxidized fast (step 3), which is typically not the case for more difficult-to-oxidize targets. 12 , 13 …”

“…The simplest stoichiometric mechanism of Fe-TAML-catalyzed oxidations by H 2 O 2 in aqueous media is straightforward. , The iron­(III) resting state of any Fe-TAML catalyst is activated by an oxidant such as H 2 O 2 (step 1), and the active catalyst formed then attacks an electron donor, S (step 2). If S is a dye, the primary products are usually oxidized fast (step 3), which is typically not the case for more difficult-to-oxidize targets. , …”