title

دهالوژناسیون بی فنیل های پلی کلره و دی فنیل اترهای پلی برمه با استفاده از یک کاتالیست هیبرید بیومعدنی

هاراد, استوارت and رابسون, متیو and حضرتی, صادق and باکستر پلنت, وی اس and ردوود, ام دی and مکاسکی, ال ئی (1386) دهالوژناسیون بی فنیل های پلی کلره و دی فنیل اترهای پلی برمه با استفاده از یک کاتالیست هیبرید بیومعدنی. Journal of Environmental Monitoring ــ 9 (4). pp. 314-318. شاپا 1464-0325

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Title

Dehalogenation of polychlorinated biphenyls and polybrominated diphenyl ethers using a hybrid bioinorganic catalyst

English Abstract

The environmentally prevalent polybrominated diphenyl ether (PBDE) #47 and polychlorinated biphenyls (PCBs) #28 and #118 were challenged for 24 hours with a novel biomass-supported Pd catalyst (Bio-Pd0). Analysis of the products via GC-MS revealed the Bio-Pd0 to cause the challenged compounds to undergo stepwise dehalogenation with preferential loss of the least sterically hindered halogen atom. A mass balance for PCB #28 showed that it is degraded to three dichlorobiphenyls (33.9%), two monochlorobiphenyls (12%), and biphenyl (30.7%). The remaining mass was starting material. In contrast, while PCB #118 underwent degradation to yield five tetra- and five trichlorinated biphenyls, no less chlorinated products or biphenyl were detected, and the total mass of degraded products was 0.3%. Although the Bio-Pd0 material was developed for treatment of PCBs, a mass balance for PBDE #47 showed that the biocatalyst could prove a potentially useful method for treatment of PBDEs. Specifically, 10% of PBDE #47 was converted to identifiable lower brominated congeners, predominantly the tribrominated PBDE #17 and the dibrominated PBDE #4, 75% remained intact, while 15% of the starting mass was unaccounted for. The Royal Society of Chemistry

Item Type:Article
زبان سند : انگلیسی
نویسنده مسئول :استوارت هاراد
Additional Information:Impact factor: 1.810 Abstracting and Indexing : 1-MEDLINE
کلیدواژه ها (انگلیسی):Dehalogenation - polychlorinated biphenyls - polybrominated diphenyl - PCBs -PBDE
Subjects:WA Public Health > WA 400 Occupational Medicin, health and hygiene
WA Public Health > WA 400 Occupational Medicin, health and hygiene
Divisions:Faculty of Health > Department of Environmental health
ID Code:969
Deposited By: Dr Sadeg Hazrati
Deposited On:02 Dec 1388
Last Modified:19 Nov 1391 10:13

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