Dataset Information

Fluorescence based detection of polychlorinated biphenyls (PCBs) in water using hydrophobic interactions.

ABSTRACT: Despite increasing controls in their production and disposal, persistent organic pollutants in water, even at concentrations below parts per million, represent an ongoing environmental health risk. Despite this concern, the detection of these compounds in water sources rely upon expensive, time consuming approaches that do not permit frequent monitoring and evaluation. In this work, a new fluorescence-based technique is presented for the detection of polychlorinated biphenyls (PCBs) in water. Benzopyrene (BaP) fluorescence was shown to increase with trace concentrations of aromatic organic pollutants. BaP forms a hydrophobic complex with PCBs, which has allowed for the successful detection of pollutants including PCB-126, PCB-153 and PCB-118. To determine the selectivity and robustness of this response, the impact of pH, ionic strength and humic acid to mimic surface water conditions is explored. While suppression of the signal was seen, these factors' impact on the detection of PCBs was minor, suggesting that a potential sensing strategy can be developed through this interaction. It is seen that the number and location of chlorine atoms are important along with the geometric orientation of molecule's structure.

SUBMITTER: Ahmad I

PROVIDER: S-EPMC6331228 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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Fluorescence based detection of polychlorinated biphenyls (PCBs) in water using hydrophobic interactions.

Ahmad Irfan I Weng Jiaying J Stromberg A J AJ Hilt J Z JZ Dziubla T D TD

The Analyst 20190101 2

Despite increasing controls in their production and disposal, persistent organic pollutants in water, even at concentrations below parts per million, represent an ongoing environmental health risk. Despite this concern, the detection of these compounds in water sources rely upon expensive, time consuming approaches that do not permit frequent monitoring and evaluation. In this work, a new fluorescence-based technique is presented for the detection of polychlorinated biphenyls (PCBs) in water. Be ...[more]

PMID: 30511719

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Project description:Serum concentrations of 35 ortho-substituted polychlorinated biphenyl congeners (PCBs) were measured in 765 adults from Anniston, Alabama, where PCBs were manufactured between 1929 and 1971. As part of the Anniston Community Health Survey (ACHS), demographic data, questionnaire information, and blood samples were collected from participants in 2005-2007. Forty-six percent of study participants were African-American, 70% were female, and the median age was 56 years. The median concentration of the sum of 35 PCB congeners (?PCBs) was 528 ng/g lipid, with a 90th percentile of 2,600 ng/g lipid, minimum of 17.0 ng/g lipid, and maximum of 27,337 ng/g lipid. The least square geometric mean ?PCBs was more than 2.5 times higher for African-American participants than for White participants (866 ng/g lipid vs. 331 ng/g lipid); this difference did not change materially after adjustment for age, sex, body mass index (BMI) and current smoking. In spite of large differences in absolute PCB levels, relative contributions of individual congeners to ?PCBs were quite similar between race groups. Nevertheless, while percent contributions to ?PCBs for most of the most abundant penta- to heptachlorobiphenyls were higher among African-Americans, the percentages were higher in Whites for the lower-chlorinated PCBs 28 and 74 and for octa- to decachlorinated PCBs. No major differences were observed in geometric mean ?PCBs between women and men when adjusted for age, race, BMI and current smoking (516 ng/g lipid vs. 526 ng/g lipid). Principal component analysis revealed groups of co-varying congeners that appear to be determined by chlorine substitution patterns. These congener groupings were similar between ACHS participants and the National Health and Nutrition Examination Survey (NHANES) 2003-04 sample of the general United States population, despite ACHS participants having serum concentrations of ?PCBs two to three times higher than those in comparable age and race groups from NHANES.

Dataset Information

Fluorescence based detection of polychlorinated biphenyls (PCBs) in water using hydrophobic interactions.

Publications

Fluorescence based detection of polychlorinated biphenyls (PCBs) in water using hydrophobic interactions.

Similar Datasets

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