Soil sorption of co‐planar and non‐planar PCBs

Cortés, Amparo; Riego, J.; Payá-Pérez, Ana; Larsen, B.

doi:10.1080/02772249109357675

Cited by 23 publications

(7 citation statements)

References 2 publications

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“…The extremely low solubility and dissolution rate of PCBs in water (Opperhulzen et al, 1988) cause a strong sorption of these chemicals to soil particles (Cortes et al, 1991;Paya-Perez et al, 1991). Because only the water soluble fraction of the chemical is generally available to the degrading microorganisms (Al-Bashir et al, 1991;Thomas et al, 1986), the PCB sorption on soil represents a serious obstacle to an efficient bioremediation of chronically PCBcontaminated soils (Harkness et al, 1993;Providenti et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Cyclodextrin effects on theex-situ bioremediation of a chronically polychlorobiphenyl-contaminated soil

Fava

Gioia

Marchetti

1998

Biotechnol. Bioeng.

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The possibility of enhancing the intrinsic ex‐situ bioremediation of a chronically polychlorinated biphenyl‐contaminated soil by using cyclodextrins was studied in this work. The soil, contaminated with a large array of polychlorinated biphenyls and deriving from a dump site where it has been stored for about 10 years, was found to contain indigenous cultivable aerobic bacteria capable of utilising biphenyl and chlorobenzoic acids. The soil was amended with inorganic nutrients and biphenyl, saturated with water, and treated in aerobic batch slurry‐ and fixed‐phase reactors. Hydroxypropyl‐β‐cyclodextrin and γ‐cyclodextrin, added to both reactor systems at the concentration of 10 g/L at the 39th and 100th days of treatment, were found to generally enhance the depletion rate and extent of the soil polychlorobiphenyls. Despite some abiotic losses could have affected the depletion data, experimental evidence, such as the production of metabolites tentatively characterized as chlorobenzoic acids and chloride ion accumulation in the reactors, indicated that cyclodextrins significantly enhanced the biological degradation of the soil polychlorobiphenyls. This result has been ascribed to the capability of cyclodextrins of enhancing the availability of polychlorobiphenyls in the hydrophilic soil environment populated by immobilised and suspended indigenous soil microorganisms. Both cyclodextrins were metabolised by the indigenous soil microorganisms at the concentration at which they were used. Therefore, cyclodextrins, both for their capability of enhancing the biodegradation of soil polychlorobiphenyls and for their biodegradability, can have the potential of being successfully used in the bioremediation of chronically polychlorinated biphenyl‐contaminated soils. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 58:345–355, 1998.

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Section: Introductionmentioning

confidence: 99%

Cyclodextrin effects on theex-situ bioremediation of a chronically polychlorobiphenyl-contaminated soil

Fava

Gioia

Marchetti

1998

Biotechnol. Bioeng.

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“…Sorption of non-ortho CBs is stronger than other CBs with the same degree of chlorination [132]. Sediments fairly reflect water pollution in a region from the past.…”

Section: Non-ortho Coplanar Congeners In Aroclor Mixtures (Wt% Contrimentioning

confidence: 89%

Non- and Mono-ortho Chlorinated Biphenyls

Kannan¹

2000

Volume 3 Anthropogenic Compounds Part K

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Polychlorinated biphenyls (PCBs) are a complex mixture, identified in every component of the global ecosystem. If potential toxicity, environmental prevalence, and potential risk to humans and wildlife are considered, non-and mono-ortho substituted chlorinated biphenyls become extremely important. They resemble 2,3,7,8-tetrachloro dibenzo-p-dioxin (TCDD) in their biological action, causing hepato-, immuno-, reproductive, and dermal toxicities, and inducing mixed function oxidase (MFO) enzymes. This is the basis behind TCDD toxic equivalency (TEQs) as an approach towards risk assessment. Improvements in chromatographic techniques have yielded an array of analytical methods for these congeners that resulted in the determination of coplanar non-ortho and mono-ortho CBs in air, water, soil, and in organisms. Long range trans-hemispheric transportation of these substances in air and ocean currents have been demonstrated. Their contents in commercial PCBs have been studied and their formation during incineration is shown. Long term studies in river sediments demonstrate reductive dechlorination. PCB clearance from animals occurs both by non-metabolic and metabolic routes. Their flux in air, water, and sediments is estimated. OH reactions in the atmosphere is proposed as a principal source of loss along with permanent burial in marine and fresh water sediments.

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“…Dissolved organic matter and suspended solids in water attract hydrophobic pollutants (i.e., PCBs, chlorinated pesticides, and some PAHs) but also some metals (iron, copper, mercury, and zinc). (Balasubramani et al, 2014;Bronner & Goss, 2011;Cortes et al, 1991;Hegeman et al, 1995;Jaffé, 1991;Karickhoff et al, 1979;Tülp et al, 2009;Y. Yang et al, 2013;Yu et al, 2017).…”

Section: Other Possible Sources Of Toxic Pollutantsmentioning

confidence: 99%

Analysis of Toxic Pollutant Sources and Characteristics Contributing to Water Quality Impairments in the Willamette River Basin

Borgens¹

2019

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I would like to express my sincere gratitude and appreciation to my Community Partner and MEM Committee for all the support and guidance I received during the process of developing and completing my thesis. Thank you to Dr. Eugene Foster for providing me the opportunity and freedom to work on a project of great interest to me, providing invaluable mentoring and guidance on project management, and most importantly, keeping me on track to achieving my personal and Project goals. Thank you to Dr. Daniel Sobota for your technical guidance and for reminding me to keep the intent of my research focused on the Project goals and objectives, helping me understand the importance of scientific writing. Thank you to Dr. Yangdong Pan for your kind patience in helping me understand the complexity and joy of environmental statistical analysis. Thank you to Dr. Joseph Maser for the guidance at the start of my graduate program in developing my project and support during MEM lab group discussions. I would also like to express my appreciation to students and faculty of the ESM Department as well as to faculty of the College of Engineering at PSU. The knowledge I received from faculty during challenging and complex classwork, and support from fellow students, have been invaluable. Thank you also to my MEM lab group for their constructive criticism, feedback, and support. I would also like to thank my employer (AECOM) and undergraduate college sorority (Kappa Delta at Oregon State University). The completion of this thesis (and graduate degree) in a three-year period would not have been possible without their financial support. And last but not least, thank you to my family, friends, and colleagues for their emotional support as I managed graduate school while working full time. Cover photo: (Melinda Borgens, July 2018) Clackamas River at river mile 40.1. Oregon DEQ, Stream Location Identification Tool interactive map (DEQ, 2018b).

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Soil sorption of co‐planar and non‐planar PCBs

Cited by 23 publications

References 2 publications

Cyclodextrin effects on theex-situ bioremediation of a chronically polychlorobiphenyl-contaminated soil

Cyclodextrin effects on theex-situ bioremediation of a chronically polychlorobiphenyl-contaminated soil

Non- and Mono-ortho Chlorinated Biphenyls

Analysis of Toxic Pollutant Sources and Characteristics Contributing to Water Quality Impairments in the Willamette River Basin

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