DECHLORINATION OF 2,4,6-TRICHLOROPHENOL UNDER DENITRIFYING AND SULFATE REDUCING CONDITIONS

摘要

Chlorophenols are among the most important and versatile industrial organicrncompounds that are widely used as insecticides, herbicides, and fungicides as wellrnas preservatives for wood, glue, paint, vegetable fibers, and leather. In this research,rnbatch experiment was made to confirm the degradation of 2,4,6-trichlorophenol (2,4,6-rnTCP) under denitrifying and sulfate reducing conditions. The kinetic parameters usedrnin Haldane equation were estimated from the results. Less than 0.18 mM (?φ 1 35 μγ/Λ)rnοφ 2,4,6-ΤΧΠ ωασ χομπλετελψ ρεμο(ω)εδ ιν 24 ηουρσ, βυτ ωηεν ο(ω)ερ 0.20 μΜ (?φ 1 40rnμγ/Λ), ιτ ωασ νοτ δεγραδεδ. Ινηιβιτιον χοεφφιχιεντσ (KΙ) ιν Ηαλδανε ινηιβιτιον μοδελrnυνδερ δενιτριφψινγ ανδ συλφατε ρεδυχινγ χονδιτιον ωερε 21.4 ανδ 0.93 μγ/Λ,rnρεσπεχτι(ω)ελψ. Σινγλε σλυδγε ανοξιχ-οξιχ προχεσσ ωασ οπερατεδ φορ τηε ρεμο(ω)αλ οφrn2,4,6-ΤΧΠ. 2,4,6-ΤΧΠ ωασ χομπλετελψ ρεμο(ω)εδ βψ σινγλε σλυδγε ανοξιχ-οξιχ προχεσσrnατ ρεχψχλε ρατε οφ 1.5Θ. Tηε ιντερμεδιατεσ συχη ασ 2,4-ΔΧΠ, 4-ΧΠ ανδ πηενολ ωερεrnνοτ δετεχτεδ δυρινγ τηε οπερατιον οφ τηισ προχεσσ. Bιοδεγραδατιον οφ 2,4,6-ΤΧΠ υνδερrnanoxic condition was thought to have a degradation pathway different from that ofrnanaerobic or aerobic biodegradation.