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UV/Peroxyacetic Acid Mediated Chlorophenol Congener Degradation
The significance of the chlorine substituent in the remediation of chlorophenol (CP) congeners viz. 4‐chlorophenol (4‐CP), 2,4‐dichlorophenol (2,4‐DCP), 2,4,6‐trichlorophenol (2,4,6‐TCP), and pentachlorophenol (PCP) by organic oxidant, peroxyacetic acid (PAA) coupled with UV irradiation in basic media was investigated. The reactions were followed by high‐pressure LC for residual concentration and GC–MS for mineralization, and reaction product identification. The decrease in chemical oxygen demand was noted to reduce to zero during the observed time span. The decline in chloride content was ascribed to rapid consumption of chloride ions for the formation of acidic degradation products. A decrease in pH reiterated the same. CP congeners were observed to degrade in the order, PCP > 4‐CP > 2,4‐DCP > 2,4,6‐TCP and were best described by first‐order regression fitting. During the remaining time span, the second‐order fitting was in good agreement in the order PCP > 2,4,6‐TCP > 4‐CP > 2,4‐DCP. The degradation efficacy was observed to follow the order 2,4‐DCP > PCP > 4‐CP > 2,4,6‐TCP. The formation of ring cleavage products in 2,4,6‐TCP and PCP degradation was confirmed by GC–MS.
UV/Peroxyacetic Acid Mediated Chlorophenol Congener Degradation
The significance of the chlorine substituent in the remediation of chlorophenol (CP) congeners viz. 4‐chlorophenol (4‐CP), 2,4‐dichlorophenol (2,4‐DCP), 2,4,6‐trichlorophenol (2,4,6‐TCP), and pentachlorophenol (PCP) by organic oxidant, peroxyacetic acid (PAA) coupled with UV irradiation in basic media was investigated. The reactions were followed by high‐pressure LC for residual concentration and GC–MS for mineralization, and reaction product identification. The decrease in chemical oxygen demand was noted to reduce to zero during the observed time span. The decline in chloride content was ascribed to rapid consumption of chloride ions for the formation of acidic degradation products. A decrease in pH reiterated the same. CP congeners were observed to degrade in the order, PCP > 4‐CP > 2,4‐DCP > 2,4,6‐TCP and were best described by first‐order regression fitting. During the remaining time span, the second‐order fitting was in good agreement in the order PCP > 2,4,6‐TCP > 4‐CP > 2,4‐DCP. The degradation efficacy was observed to follow the order 2,4‐DCP > PCP > 4‐CP > 2,4,6‐TCP. The formation of ring cleavage products in 2,4,6‐TCP and PCP degradation was confirmed by GC–MS.
UV/Peroxyacetic Acid Mediated Chlorophenol Congener Degradation
Sharma, Swati (author) / Mukhopadhyay, Mausumi (author) / Murthy, Zagabathuni Venkata Panchakshari (author)
CLEAN – Soil, Air, Water ; 42 ; 276-283
2014-03-01
8 pages
Article (Journal)
Electronic Resource
English
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