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Papers by Karl Rockne

Research paper thumbnail of Validation and sensitivity analysis of gas ebullition prediction by biogenic gas fracture mechanics theory

AGU Fall Meeting Abstracts, Dec 1, 2018

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Research paper thumbnail of Polybrominated Diphenyl Ethers in the Sediments of the Great Lakes. 1. Lake Superior

Environmental Science & Technology, May 11, 2004

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Research paper thumbnail of A Mechanistic Model for Gas Ebullition in the Presence of NAPLs in Sediments

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Research paper thumbnail of Modeling Organic Contaminant Transport through Reactive Media

Journal of Environmental Engineering, Sep 1, 2018

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Research paper thumbnail of Polyhalogenated Carbazoles in Sediments of Lower Laurentian Great Lakes and Regional Perspectives

ACS ES&T water, Aug 3, 2022

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Research paper thumbnail of Polyhalogenated carbazoles in freshwater and estuarine sediment from China and the United States: A multi-regional study

Science of The Total Environment, Sep 1, 2021

The present study represents a multi-regional investigation of polyhalogenated carbazoles (PHCZs)... more The present study represents a multi-regional investigation of polyhalogenated carbazoles (PHCZs) contamination in estuarine and freshwater systems from the United States and China. Although recent studies have suggested that PHCZs are persistent and bioaccumulative, available data are not sufficient to understand their large-scale spatial and temporal distributions in the environment. The present study investigated spatial distributions of PHCZs in surface sediment from multiple freshwater and estuarine systems located in China and the United States (U.S.) during the period of 2012-2017, as well as temporal distributions from vertical trends in selected sediment cores. The results demonstrated large variations of PHCZ contamination across regions, with median concentrations of ΣPHCZs in surface sediment ranging from 3.1 to 134 ng/g. Profiles of PHCZ congener composition also exhibited regional variations and estuarine-freshwater differences. These differences likely reflect the relative contributions of different natural and industrial sources among the locations. Vertical profiles of concentrations and compositions in one Chinese estuarine sediment core and two freshwater sediment cores from the U.S. all demonstrated clear anthropogenic influences to varying degrees. Toxic equivalents (TEQ) of PHCZs were estimated based on their dioxin-like activities, which ranged from <0.001 to 4.94 pg TEQ/g in all sites. The results suggest that PHCZs could add additional ecological risks to the benthos and other aquatic organisms. Our findings constitute an essential contribution to the knowledge body of PHCZ contamination in global aquatic systems and congener-specific contamination characterizations.

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Research paper thumbnail of Accumulation rates, focusing factors, and chronologies from depth profiles of 210Pb and 137Cs in sediments of the Laurentian Great Lakes

Journal of Great Lakes Research, Aug 1, 2018

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Research paper thumbnail of FATE OF ENVIRONMENTAL POLLUTANTS doi:10.2175/106143005X54632

This section covers studies published during the calendar year 2004 on the fate of environmental ... more This section covers studies published during the calendar year 2004 on the fate of environmental pollutants in soils, surface water and groundwaters. Studies related to water quality and sources of pollution by environmental pollutants as well as reaction kinetics and modeling are reviewed in detail. Also included in the coverage of present review is research on pollutants such as nutrients, pathogens, xenobiotics, radionuclides and nanoparticles.

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Research paper thumbnail of Organic contaminated sediments remediation with active caps: Nonlinear adsorption unveiled by combined isotherm and column transportation studies

Chemosphere, 2019

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Research paper thumbnail of Polybrominated Diphenyl Ethers in the Sediments of the Great Lakes. 4. Influencing Factors, Trends, and Implications

Environmental Science & Technology, Nov 4, 2006

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Research paper thumbnail of Fate of Environmental Pollutants

Water Environment Research, Sep 1, 2005

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Research paper thumbnail of Gas ebullition from petroleum hydrocarbons in aquatic sediments: A review

Journal of Environmental Management, Oct 1, 2020

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Research paper thumbnail of Untargeted Screening and Distribution of Organo-Iodine Compounds in Sediments from Lake Michigan and the Arctic Ocean

Environmental Science & Technology, Sep 9, 2016

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Research paper thumbnail of Untargeted Screening and Distribution of Organo-Bromine Compounds in Sediments of Lake Michigan

Environmental Science & Technology, Dec 14, 2015

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Research paper thumbnail of Impact of Drought Conditions on Nutrient Removal, Sediment Organic Matter, and Flow Hydraulics in a Treatment Wetland

AGUFM, Dec 1, 2018

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Research paper thumbnail of Source Apportionment of Polycyclic Aromatic Hydrocarbons in Illinois River Sediment

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Research paper thumbnail of Reductive Dechlorination of Tetrachloroethene by a Mixed Bacterial Culture Growing on Ethyl Lactate

Journal Of Environmental Science And Health, Part A, Dec 27, 2004

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Research paper thumbnail of Relationships between composite roughness and Streptococcus mutans biofilm depth under shear in vitro

Journal of Dentistry

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Research paper thumbnail of Logistic Regression Analysis of LC-MS/MS Data of Monomers Eluted from Aged Dental Composites: A Supervised Machine-Learning Approach

Analytical Chemistry, Mar 14, 2023

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Research paper thumbnail of Stoichiometric models of sucrose and glucose fermentation by oral streptococci: Implications for free acid formation and enamel demineralization

Dental Materials

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Research paper thumbnail of Validation and sensitivity analysis of gas ebullition prediction by biogenic gas fracture mechanics theory

AGU Fall Meeting Abstracts, Dec 1, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Polybrominated Diphenyl Ethers in the Sediments of the Great Lakes. 1. Lake Superior

Environmental Science & Technology, May 11, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Mechanistic Model for Gas Ebullition in the Presence of NAPLs in Sediments

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Modeling Organic Contaminant Transport through Reactive Media

Journal of Environmental Engineering, Sep 1, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Polyhalogenated Carbazoles in Sediments of Lower Laurentian Great Lakes and Regional Perspectives

ACS ES&T water, Aug 3, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Polyhalogenated carbazoles in freshwater and estuarine sediment from China and the United States: A multi-regional study

Science of The Total Environment, Sep 1, 2021

The present study represents a multi-regional investigation of polyhalogenated carbazoles (PHCZs)... more The present study represents a multi-regional investigation of polyhalogenated carbazoles (PHCZs) contamination in estuarine and freshwater systems from the United States and China. Although recent studies have suggested that PHCZs are persistent and bioaccumulative, available data are not sufficient to understand their large-scale spatial and temporal distributions in the environment. The present study investigated spatial distributions of PHCZs in surface sediment from multiple freshwater and estuarine systems located in China and the United States (U.S.) during the period of 2012-2017, as well as temporal distributions from vertical trends in selected sediment cores. The results demonstrated large variations of PHCZ contamination across regions, with median concentrations of ΣPHCZs in surface sediment ranging from 3.1 to 134 ng/g. Profiles of PHCZ congener composition also exhibited regional variations and estuarine-freshwater differences. These differences likely reflect the relative contributions of different natural and industrial sources among the locations. Vertical profiles of concentrations and compositions in one Chinese estuarine sediment core and two freshwater sediment cores from the U.S. all demonstrated clear anthropogenic influences to varying degrees. Toxic equivalents (TEQ) of PHCZs were estimated based on their dioxin-like activities, which ranged from <0.001 to 4.94 pg TEQ/g in all sites. The results suggest that PHCZs could add additional ecological risks to the benthos and other aquatic organisms. Our findings constitute an essential contribution to the knowledge body of PHCZ contamination in global aquatic systems and congener-specific contamination characterizations.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Accumulation rates, focusing factors, and chronologies from depth profiles of 210Pb and 137Cs in sediments of the Laurentian Great Lakes

Journal of Great Lakes Research, Aug 1, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of FATE OF ENVIRONMENTAL POLLUTANTS doi:10.2175/106143005X54632

This section covers studies published during the calendar year 2004 on the fate of environmental ... more This section covers studies published during the calendar year 2004 on the fate of environmental pollutants in soils, surface water and groundwaters. Studies related to water quality and sources of pollution by environmental pollutants as well as reaction kinetics and modeling are reviewed in detail. Also included in the coverage of present review is research on pollutants such as nutrients, pathogens, xenobiotics, radionuclides and nanoparticles.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Organic contaminated sediments remediation with active caps: Nonlinear adsorption unveiled by combined isotherm and column transportation studies

Chemosphere, 2019

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Research paper thumbnail of Polybrominated Diphenyl Ethers in the Sediments of the Great Lakes. 4. Influencing Factors, Trends, and Implications

Environmental Science & Technology, Nov 4, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fate of Environmental Pollutants

Water Environment Research, Sep 1, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Gas ebullition from petroleum hydrocarbons in aquatic sediments: A review

Journal of Environmental Management, Oct 1, 2020

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Untargeted Screening and Distribution of Organo-Iodine Compounds in Sediments from Lake Michigan and the Arctic Ocean

Environmental Science & Technology, Sep 9, 2016

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Untargeted Screening and Distribution of Organo-Bromine Compounds in Sediments of Lake Michigan

Environmental Science & Technology, Dec 14, 2015

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Research paper thumbnail of Impact of Drought Conditions on Nutrient Removal, Sediment Organic Matter, and Flow Hydraulics in a Treatment Wetland

AGUFM, Dec 1, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Source Apportionment of Polycyclic Aromatic Hydrocarbons in Illinois River Sediment

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Reductive Dechlorination of Tetrachloroethene by a Mixed Bacterial Culture Growing on Ethyl Lactate

Journal Of Environmental Science And Health, Part A, Dec 27, 2004

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Relationships between composite roughness and Streptococcus mutans biofilm depth under shear in vitro

Journal of Dentistry

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Logistic Regression Analysis of LC-MS/MS Data of Monomers Eluted from Aged Dental Composites: A Supervised Machine-Learning Approach

Analytical Chemistry, Mar 14, 2023

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Stoichiometric models of sucrose and glucose fermentation by oral streptococci: Implications for free acid formation and enamel demineralization

Dental Materials

Bookmarks Related papers MentionsView impact

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