halogenated Dioxin / dioxin - like compounds are a sort of chemical waste that are formed during combustional processes or industrial processes such as paper pulp bleaching.The basic structure comprise of 2 benzene rings joined at their para carbons by 2 oxygen atoms.

poly-cholorinated dibenzo- p - dioxin(PCDD) , polychlorinated dibienzofurans(PCDF), polychorinated diphenyl ethers(PCDE)

Dioxins

Mechanism

Enzymes

• Manganese peroxidase
• Lignin peroxidase

• ex )P.chrysosporium degrades 2,7-Dichlorodibenzo-p-Dioxin(DCDD)

(I)2,7-dichlorodibenzo-p-dioxin

(II)1-chloro-3,4-dihydroxybenzene

(III)1,2,4-trihydroxybenzene

(IV)2-methoxy-1,4-dihydroxybenzene

(V)4-chloro-1,2-benzoquinone

(VI)1-chloro-3,4-dimethoxybenzene (VI)

(VII)2-methoxy-1,4-benzoquinone

(VIII)2-hydroxy-1,4-benzoquinone

4-hydroxy-1,2-benzoquinone

reference

Reiner, Eric J.; Clement, Ray E.; Okey, Allan B.; Marvin, Chris H. Journal: Analytical and Bioanalytical Chemistry Vol. 386 Issue 4

Bioremediation of Dioxin-Contaminated Soil by Fungi Screened from Nature Sanro Tachibana, Yukinori Kiyota and Michifusa Koga

Degradation of 2,7-Dichlorodibenzo-p-Dioxin by the Lignin- Degrading Basidiomycete Phanerochaete chrysosporium KHADAR VALLI, HIROYUKI WARIISHI, AND MICHAEL H. GOLD