R U Halden

Summary

Affiliation: Johns Hopkins Bloomberg School of Public Health
Country: USA

Publications

  1. ncbi request reprint Evaluation of standard methods for the analysis of methyl tert-butyl ether and related oxygenates in gasoline-contaminated groundwater
    R U Halden
    Lawrence Livermore National Laboratory, Livermore, California 94551, USA
    Environ Sci Technol 35:1469-74. 2001
  2. ncbi request reprint Comment on "biological removal of polychlorinated dibenzo-p-dioxins from incinerator fly ash by Sphingomonas wittichii RW1" by I.-H. Nam, Y.-M. Kim, B.-H. Kim, K. Murugesan, and Y.-S. Chang
    Rolf U Halden
    Center for Water and Health, Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
    Water Res 40:1918-20. 2006
  3. ncbi request reprint Analysis of triclocarban in aquatic samples by liquid chromatography electrospray ionization mass spectrometry
    Rolf U Halden
    Johns Hopkins University, Bloomberg School of Public Health, Department of Environmental Health Sciences, Johns Hopkins University Center for Water and Health, 615 North Wolfe Street, Room E6618, Baltimore, Maryland 21205 2103, USA
    Environ Sci Technol 38:4849-55. 2004
  4. ncbi request reprint Co-occurrence of triclocarban and triclosan in U.S. water resources
    Rolf U Halden
    Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205 2103, USA
    Environ Sci Technol 39:1420-6. 2005
  5. pmc Identification and phenotypic characterization of Sphingomonas wittichii strain RW1 by peptide mass fingerprinting using matrix-assisted laser desorption ionization-time of flight mass spectrometry
    Rolf U Halden
    Center for Water and Health, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
    Appl Environ Microbiol 71:2442-51. 2005
  6. ncbi request reprint Ab initio and in situ comparison of caffeine, triclosan, and triclocarban as indicators of sewage-derived microbes in surface waters
    Thayer A Young
    Johns Hopkins University Center for Water and Health, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA
    Environ Sci Technol 42:3335-40. 2008
  7. ncbi request reprint Detection of triclocarban and two co-contaminating chlorocarbanilides in US aquatic environments using isotope dilution liquid chromatography tandem mass spectrometry
    Amir Sapkota
    Department of Environmental Health Sciences, Johns Hopkins University, Bloomberg School of Public Health, Johns Hopkins University Center for Water and Health, Baltimore, MD 21205 2103, USA
    Environ Res 103:21-9. 2007
  8. ncbi request reprint Reduction of infectivity of schistosome cercariae by application of cercaricidal oil to water
    Jean Marie Naples
    Department of Molecular Microbiology and Immunology, and Department of Environmental Health Sciences, Center for Water and Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205, USA
    Am J Trop Med Hyg 73:956-61. 2005
  9. ncbi request reprint Polycyclic aromatic hydrocarbons in human milk of nonsmoking U.S. women
    Sung R Kim
    Department of Environmental Health Sciences Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, Maryland 21205, USA
    Environ Sci Technol 42:2663-7. 2008
  10. ncbi request reprint Mass balance assessment of triclosan removal during conventional sewage treatment
    Jochen Heidler
    Johns Hopkins University, Bloomberg School of Public Health, Department of Environmental Health Sciences, Johns Hopkins University Center for Water and Health, Baltimore, MD 21205 2103, USA
    Chemosphere 66:362-9. 2007

Collaborators

Detail Information

Publications24

  1. ncbi request reprint Evaluation of standard methods for the analysis of methyl tert-butyl ether and related oxygenates in gasoline-contaminated groundwater
    R U Halden
    Lawrence Livermore National Laboratory, Livermore, California 94551, USA
    Environ Sci Technol 35:1469-74. 2001
    ..For all three methods, detection limits determined in reagent water were sufficiently low for monitoring MTBE at the stringent primary (13 microg/L) and secondary (5 microg/L) action levels set by the state of California...
  2. ncbi request reprint Comment on "biological removal of polychlorinated dibenzo-p-dioxins from incinerator fly ash by Sphingomonas wittichii RW1" by I.-H. Nam, Y.-M. Kim, B.-H. Kim, K. Murugesan, and Y.-S. Chang
    Rolf U Halden
    Center for Water and Health, Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
    Water Res 40:1918-20. 2006
  3. ncbi request reprint Analysis of triclocarban in aquatic samples by liquid chromatography electrospray ionization mass spectrometry
    Rolf U Halden
    Johns Hopkins University, Bloomberg School of Public Health, Department of Environmental Health Sciences, Johns Hopkins University Center for Water and Health, 615 North Wolfe Street, Room E6618, Baltimore, Maryland 21205 2103, USA
    Environ Sci Technol 38:4849-55. 2004
    ..S. water resources. Study results suggest that the bacteriostat and pesticide is a frequent but currently underreported contaminant whose environmental fate and behavior deserve further scrutiny...
  4. ncbi request reprint Co-occurrence of triclocarban and triclosan in U.S. water resources
    Rolf U Halden
    Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205 2103, USA
    Environ Sci Technol 39:1420-6. 2005
    ..S.) currently used by the U.S. Environmental Protection Agency for evaluating TCC's ecological and human health risks...
  5. pmc Identification and phenotypic characterization of Sphingomonas wittichii strain RW1 by peptide mass fingerprinting using matrix-assisted laser desorption ionization-time of flight mass spectrometry
    Rolf U Halden
    Center for Water and Health, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
    Appl Environ Microbiol 71:2442-51. 2005
    ....
  6. ncbi request reprint Ab initio and in situ comparison of caffeine, triclosan, and triclocarban as indicators of sewage-derived microbes in surface waters
    Thayer A Young
    Johns Hopkins University Center for Water and Health, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA
    Environ Sci Technol 42:3335-40. 2008
    ..It is concluded that chemical monitoring of microbial risks is more effective when using hydrophobic OWCs such as triclosan and triclocarban in place of, or in conjunction with, the traditional marker caffeine...
  7. ncbi request reprint Detection of triclocarban and two co-contaminating chlorocarbanilides in US aquatic environments using isotope dilution liquid chromatography tandem mass spectrometry
    Amir Sapkota
    Department of Environmental Health Sciences, Johns Hopkins University, Bloomberg School of Public Health, Johns Hopkins University Center for Water and Health, Baltimore, MD 21205 2103, USA
    Environ Res 103:21-9. 2007
    ....
  8. ncbi request reprint Reduction of infectivity of schistosome cercariae by application of cercaricidal oil to water
    Jean Marie Naples
    Department of Molecular Microbiology and Immunology, and Department of Environmental Health Sciences, Center for Water and Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205, USA
    Am J Trop Med Hyg 73:956-61. 2005
    ..We conclude that application of the biodegradable formulation to the surface of schistosome-infested waters may be an effective, economical, and safe means of reducing human infections...
  9. ncbi request reprint Polycyclic aromatic hydrocarbons in human milk of nonsmoking U.S. women
    Sung R Kim
    Department of Environmental Health Sciences Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, Maryland 21205, USA
    Environ Sci Technol 42:2663-7. 2008
    ..These first measurements of PAH levels in U.S. human milk are comparable to concentrations reported previously for European and Asian women...
  10. ncbi request reprint Mass balance assessment of triclosan removal during conventional sewage treatment
    Jochen Heidler
    Johns Hopkins University, Bloomberg School of Public Health, Department of Environmental Health Sciences, Johns Hopkins University Center for Water and Health, Baltimore, MD 21205 2103, USA
    Chemosphere 66:362-9. 2007
    ..Furthermore, study findings indicate that the common practice of sludge recycling in agriculture results in the transfer of substantial quantities of TCS to US soils used, in part, for animal husbandry and crop production...
  11. pmc Aerobic biodegradation of methyl tert-butyl ether by aquifer bacteria from leaking underground storage tank sites
    S R Kane
    Lawrence Livermore National Laboratory, Livermore, California 94550, USA
    Appl Environ Microbiol 67:5824-9. 2001
    ....
  12. pmc Partitioning, persistence, and accumulation in digested sludge of the topical antiseptic triclocarban during wastewater treatment
    Jochen Heidler
    Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University Center for Water and Health, Johns Hopkins University, 615 North Wolfe Street, Room E6618, Baltimore, Maryland 21205 2103, USA
    Environ Sci Technol 40:3634-9. 2006
    ....
  13. pmc Identification of wastewater bacteria involved in the degradation of triclocarban and its non-chlorinated congener
    Todd R Miller
    Johns Hopkins University, Department of Environmental Health Sciences, Baltimore, MD 21205, United States
    J Hazard Mater 183:766-72. 2010
    ..These organisms are promising agents for the bioremediation of hazardous phenylurea pollutants...
  14. ncbi request reprint Volatile organic compounds in human milk: methods and measurements
    Sung R Kim
    Department of Environmental Health Sciences Room W7014, Johns Hopkins School of Public Health, 615 North Wolfe Street, Baltimore, Maryland 21205, USA
    Environ Sci Technol 41:1662-7. 2007
    ..Thus, VOC exposure from breast milk is vastly exceeded by that from indoor air in nonsmoking households. Accordingly, strategies to mitigate infant VOC exposure should focus on the indoor air inhalation pathway of exposure...
  15. ncbi request reprint Urinary biomarkers of 1,3-butadiene in environmental settings using liquid chromatography isotope dilution tandem mass spectrometry
    Amir Sapkota
    Department of Environmental Health Sciences, Johns Hopkins University Bloomberg School of Public Health, 615 N Wolfe St, Baltimore, MD 21205, USA
    Chem Biol Interact 160:70-9. 2006
    ....
  16. pmc Bioaccumulation of triclocarban in Lumbriculus variegatus
    Christopher P Higgins
    Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
    Environ Toxicol Chem 28:2580-6. 2009
    ..Overall, study observations indicate that TCC bioaccumulates from sediments in a manner that is consistent with the traditional hydrophobic organic contaminant paradigm...
  17. pmc Global screening of human cord blood proteomes for biomarkers of toxic exposure and effect
    David R Colquhoun
    Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
    Environ Health Perspect 117:832-8. 2009
    ..Therefore, an understanding of fetal responses to environmental exposures is essential. To that end, cord blood is a readily accessible biofluid whose proteomic makeup remains mostly unexplored when compared with that of adults...
  18. doi request reprint Feather meal: a previously unrecognized route for reentry into the food supply of multiple pharmaceuticals and personal care products (PPCPs)
    D C Love
    Johns Hopkins Center for a Livable Future, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States
    Environ Sci Technol 46:3795-802. 2012
    ..This is the first study to detect antimicrobial residues in feather meal. Initial results suggest that more studies are needed to better understand potential risks posed to consumers by drug residues in feather meal...
  19. pmc Fate of organohalogens in US wastewater treatment plants and estimated chemical releases to soils nationwide from biosolids recycling
    Jochen Heidler
    Johns Hopkins University, Bloomberg School of Public Health, Department of Environmental Health Sciences, Johns Hopkins University Center for Water and Health, USA
    J Environ Monit 11:2207-15. 2009
    ..This study addresses some of the data gaps identified by the National Research Council in its 2002 study on standards and practices of biosolids application on land...
  20. pmc Meta-analysis of mass balances examining chemical fate during wastewater treatment
    Jochen Heidler
    Johns Hopkins University Center for Water and Health, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA
    Environ Sci Technol 42:6324-32. 2008
    ..2 (log10 K(OC) > 4.4). In contrast, hydrophobicity had no or only limited value for estimating, respectively, phi and the overall persistence of a chemical during conventional wastewater treatment...
  21. pmc Fate of triclosan and evidence for reductive dechlorination of triclocarban in estuarine sediments
    Todd R Miller
    Center for Water and Health, Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205, USA
    Environ Sci Technol 42:4570-6. 2008
    ..Environmental persistence over the past 40 years was observed for triclosan and triclocarban in JB, and for triclocarban's diphenylurea backbone in CB sediments...
  22. ncbi request reprint Sorption and bioreduction of hexavalent uranium at a military facility by the Chesapeake Bay
    Wenming Dong
    Center for Water and Health, Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
    Environ Pollut 142:132-42. 2006
    ....
  23. ncbi request reprint Bacterial community analysis of shallow groundwater undergoing sequential anaerobic and aerobic chloroethene biotransformation
    Todd R Miller
    Department of Environmental Health Sciences, Center for Water and Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA
    FEMS Microbiol Ecol 60:299-311. 2007
    ..The study shows that bacterial community structure is related to groundwater geochemistry and that Alphaproteobacteria are enriched in locales where cis-DCE removal occurs...
  24. ncbi request reprint Comment on "Accumulation of contaminants in fish from wastewater treatment wetlands"
    Rolf U Halden
    Environ Sci Technol 40:3437; author reply 3438-9. 2006

Research Grants2

  1. Novel Approaches to Studying the Situ Bioremediation of Complex Mixtures
    ROLF HALDEN; Fiscal Year: 2007
    ..abstract_text> ..