Abstract:
:This article reports the results of various biodegradation experiments on polychlorinated biphenyl (PCB)-contaminated sandy soil employing a mixed culture of acclimatized bacteria. Following the optimization of different variables without chemical pretreatment, the elimination rate achieved of Aroclor 1242 in slurry-phase reactors was 61% after four months of treatment, with the presence of biphenyl as cosubstrate being the most important factor affecting PCB biodegradation. The biodegradation occurred as a first-order process, and it proved most effective in respect to dichlorinated biphenyls (100% removal), followed by trichlorinated (92%) and tetrachlorinated biphenyls (24%). The results also showed that the degradability of PCBs in soil may be enhanced by an advanced oxidation pretreatment (Fenton reaction), producing almost 100% elimination of PCBs at the end of the integrated chemical-biological process and 72% mineralization of the intermediates generated during the chemical pretreatment.
journal_name
Environ Toxicol Chemjournal_title
Environmental toxicology and chemistryauthors
Manzano MA,Perales JA,Sales D,Quiroga JMsubject
Has Abstractpub_date
2003-04-01 00:00:00pages
699-705issue
4eissn
0730-7268issn
1552-8618journal_volume
22pub_type
杂志文章abstract::Exposure to agrochemicals in the aquatic environment often occurs as time-varying or repeated pulses. Time-varying exposures may occur due to runoff events and spray drift associated with precipitation and application events. Hydrologic dilution, dispersion, and degradation also produce pulsed exposures. Standard labo...
journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
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journal_title:Environmental toxicology and chemistry
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journal_title:Environmental toxicology and chemistry
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journal_title:Environmental toxicology and chemistry
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doi:
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
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pub_type: 历史文章,杂志文章
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:
更新日期:2003-07-01 00:00:00
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1002/etc.4450
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pub_type: 杂志文章,评审
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journal_title:Environmental toxicology and chemistry
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更新日期:2001-01-01 00:00:00
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
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更新日期:2003-12-01 00:00:00
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:
更新日期:2003-05-01 00:00:00
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更新日期:2004-03-01 00:00:00
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
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更新日期:2007-10-01 00:00:00
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journal_title:Environmental toxicology and chemistry
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
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更新日期:2002-10-01 00:00:00
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journal_title:Environmental toxicology and chemistry
pub_type: 杂志文章
doi:10.1897/05-085r.1
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