Chemical-biological degradation of polyethylene combining Baeyer–Villiger oxidation and hydrolysis reaction of cutinase

Abstract

Polyethylene is a polyolefin that is widely used in daily life, but its efficient degradation has long been a problem. Compared with physical or chemical methods, techniques for the biodegradation...

Screening of Polyethylene-Degrading Bacteria from Rhyzopertha Dominica and Evaluation of Its Key Enzymes Degrading Polyethylene

“…Polyethylene is a large molecular weight polymer linked by a carbon–carbon single bond. It is chemically inert, corrosion resistant, non-toxic, recyclable and reprocessable [ 2 ]. High-density, low-density and linear low-density polyethylene is used in a wide range of life applications such as toys, bottles, water tanks, shopping bags, construction tools and disposable cups, as well as consumer products in electronics and medical fields [ 3 ].…”

Enhancing Lignin Model Compound Depolymerization Using Mediator-Enzyme Catalysis: A Sustainable Approach to C–C Bond Cleavage

“…In contrast, substrate A ox exhibited negligible transformation in the absence of either Novozym 435 or H 2 O 2 , underscoring the synergistic catalytic effect of the mediator (peracetic acid)–lipase system. Previous reports have suggested that the mediator–lipase system forms peracids in situ, readily activating C–C bonds to facilitate the insertion of oxygen-containing groups into ether bonds when ketone is employed as the substrate. ,,− , The plausible process for the catalytic oxidation of substrate A ox is shown in Scheme . First, histidine deprotonates the serine hydroxyl group and activates it for nucleophilic attack on carboxylic acid, resulting in the formation of the tetrahedral intermediate.…”

“…27−31 Kong reported that immobilized lipase can easily convert C−C bonds into ether bonds, facilitating the degradation of polyethylene by introducing lipase/H 2 O 2 systems. 32 Krystof et al used lipase−H 2 O 2 to form peracids in situ, which subsequently oxidize the aldehyde groups of furfural/5-hydroxymethylfurfural to prepare furandicarboxylic acid with high yields and excellent selectivity. 33 Flourat et al applied lipase-mediated Baeyer−Villiger oxidation of cyclic ketones to synthesize lactones using AcOEt as an acyl donor and H 2 O 2 as an oxidant.…”

“…Lipases possess significant industrial potential due to their stability in organic solvents, thermal stability, and independence of cofactors . Lipases can directly generate peroxycarboxylic acids from carboxylic acids with hydrogen peroxide under mild reaction conditions and in suitable organic solvents (such as ethyl acetate, toluene, and hexane). − Kong reported that immobilized lipase can easily convert C–C bonds into ether bonds, facilitating the degradation of polyethylene by introducing lipase/H 2 O 2 systems . Krystof et al used lipase–H 2 O 2 to form peracids in situ, which subsequently oxidize the aldehyde groups of furfural/5-hydroxymethylfurfural to prepare furandicarboxylic acid with high yields and excellent selectivity .…”

Materials from waste plastics for CO2capture and utilisation

“…Moreover, they also lack electronegative heteroatoms that confer polar sites to aid in CO 2 adsorption. With recent advances in post-synthetic polyolefin C-H activation chemistry, however, it is now possible to incorporate hydroxyls, carbonyls [87][88][89][90] and amines 91,92 directly onto these polyolefins in one step (Figure 5). Other than allowing easy grafting of other functional units (e.g.…”