Research Characterization of Natural and Affected Environments 2655 Hydrogen Peroxide Cycling in Surface Geothermal Waters of Yellowstone National Park Cindy L Wilson, Nancy W. Hinman, William J. Cooper, and Christopher F. Brown
Photochemical cycling of hydrogen peroxide and other elements occurs in thermal springs of various chemistries in Yellowstone National Park.
2690 Changed Enantiomer Composition of Metolachlor in Surface Water Following the Introduction of the Enantiomerically Enriched Product to the Market Hans-Rudolf Buser, Thomas Poiger, and Markus D. Miiller
The "chiral switch" of racemic to S-metolachlor is verified by enantioselective determinations in surface water from two lakes in Switzerland.
2697 Speciation of Organotin Compounds, Total Tin, and Major Trace Metal Elements in Poisoned Human Organs by Gas Chromatography-Flame Photometric Detector and Inductively Coupled Plasma-Mass Spectrometry Jiang Gui-bin, Zhou Qun-fang, and He Bin
• 2663 Impact of Engine Technology on the Vehicular Emissions in Mexico City I. Schifter, L. Dfaz, M. Vera, M. Castillo, F. Ramos, S. Avalos, and E. Lopez-Salinas
Regulated motor vehicles emissions in Mexico City decrease considerably due to new emission control technologies incorporated in new vehicles; however, old vehicle fleets still abound.
2668 The Enantioselective Bioaccumulation of Chiral Chlordane and a-HCH Contaminants in the Polar Bear Food Chain Karin Wiberg, Robert J. Letcher, Courtney D. Sandau, Ross J. Norstrom, Mats Tysklind, and Terry F. Bidleman
Enantiomer ratios of chiral pollutants were investigated in the polar bear food chain; up to a 20-fold difference in biomagnification potential between enantiomers was found.
• 2675 Concentrations and Mass Fluxes of Chloroacetic Acids and Trifluoroacetic Acid in Rain and Natural Waters in Switzerland Michael Berg, Stephan R. Muller, Jiirg Miihlemann, Adrian Wiedmer, and Rene P. Schwarzenbach
With over 1000 measurements in precipitation, surface water, groundwater, and waste water, mass balances for haloacetic acids are established over the area of Switzerland.
2684 Assessment of Levels, Distribution, and Risks of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in the Vicinity of a Vinyl Chloride Monomer Production Plant Pirjo Isosaari, Tuula Kohonen, Hannu Kiviranta, Jouko Tuomisto, and Terttu Vartiainen
Waste sludge formed in vinyl chloride monomer production and marine sediments near the production plant are shown to contain extremely high levels of octachlorodibenzofuran.
Analysis of tissue from major organs of a victim of organic tin poisoning finds methyltin compounds in the range 0.10-1.93 ug/g wet weight.
2703 Effect of a Constructed Wetland on Disinfection Byproducts: Removal Processes and Production of Precursors Colleen E. Rostad, Barbara S. Martin, Larry B. Barber, Jerry A. Leenheer, and Stephen R. Daniel
Constructed wetlands decrease disinfection byproduct concentrations but increase their formation potential as wastewater moves through the wetlands.
2711 Estimation of Mercury Emission from Coal Combustion in China Qichao Wang, Wenguo Shen, and Zhuangwei Ma
Mercury emission in coal combustion in China is estimated with the product of emission factor, mercury concentration, and consumption of coal.
2714 Airborne Particle Emissions from 2- and 4-Stroke Outboard Marine Engines: Polycyclic Aromatic Hydrocarbon and Bioassay Analyses Norman Y. Kado, Robert A. Okamoto, John Karim, and Paul A. Kuzmicky
Carbureted or fuel-injected 2-stroke outboard marine engines produce higher total airborne emissions than similar operation of a 4-stroke carbureted outboard marine engine.
2721 Correlations between Organic and Inorganic Species in Atmospheric Aerosols M. Zheng and M. Fang
Inorganic and organic tracers in aerosols from the same source are inter-related and can be used to better characterize air pollution sources.
2727 Impacts of Airborne Contamination on Regional Soil and Water Quality: The Kola Peninsula, Russia Clemens Reimann, David Banks, and Patrice de Caritat
• Supporting Information is available free of charge via the Internet at http://pubs.acs.org.
Emissions of sulfur dioxide from industry on the Kola Peninsula do not lead to acidification of humus, mineral soil, or lake water on the regional scale. JULY 1, 2000 / ENVIRONMENTAL SCIENCE & TECHNOLOGY / NEWS • 2 8 5 A
2733
2773
Nestling Blood of the White-Tailed Sea Eagle (Haliseetus albicills) as an Indicator of Territorial Exposure to Organohalogen Compounds-An Evaluation
Biosorption of Metal Ions on Arthrobacter sp.: Biomass Characterization and Biosorption Modeling
Anders Olsson, Karin Ceder, Ake Bergman, and Bjorn Helander White-tailed sea eagle nestling blood is evaluated for monitoring environmental pollutants, to determine spatial differences and permit reproductive success assessments.
In this work biosorption performances of a test microbial culture are studied by using both an original experimental precedure and a chemical modeling.
F. Pagnanelli, M. Petrangell Papini, L Toro, M. Trifonii and F. Vegliô
2779
2741
Investigating the Effect of Carbon Shape on Virus Adsorption
Occurrence and Behavior of X-ray Contrast Media in Sewage Facilities and the Aquatic Environment
Traci Powell, Gail M. Brion, Marit Jagtoyen, and Frank Derbyshire
Thomas A. Ternes and Roman Hirsch
The occurrence of iodinated X-ray contrast media in sewage facilities and the aquatic environment is detected in the ug/L-range using LC-electrospray tandem MS.
Environmental Processes 2749 Heavy Metal Sorption on Clay Minerals Affected by the Siderophore Desferrioxamine B
Bacteriophage MS2 shows excellent adsorption to new fibrous forms of activated carbon in comparison to conventional granular materials. 2784 Formation of lodo-Trihalomethanes during Disinfection and Oxidation of Iodide-Containing Waters Yves Bichsel and Urs von Gunten
Taste and odor problems related to iodoform formation in disinfection processes of iodide-containing waters are strongly influenced by the disinfectant that is utilized.
Uta Neubauer, Bernd Nowack, Gerhard Furrer, and Rainer Schulin
Depending on pH and other parameters, desferrioxamine B can increase or decrease sorption of Cu, Zn, and Cd cations on montmorillonite and kaolinite. 2756 Intermittent Exposure of Fish to Estradiol
Environmental Technology 2792 Relative Resistance of Positional Isomers of Polychlorinated Biphenyls toward Reductive Dechlorination by Zerovalent Iron in Subcritical Water
Grace H. Panter, Roy S. Thompson, and John P. Sumpter
Hwa K. Yak, Qingyong Lang, and Chien M. Wai
Intermittent exposure of male fathead minnows to estradiol causes as great an estrogenic response as continuous exposure.
The order of resistance increases from para to meta to ortho substituents in homologous positional isomers of PCBs toward reductive dechlorination by zerovalent iron in subcritical water.
2761 Acetogenic Microbial Degradation of Vinyl Chloride
2799
Paul M. Bradley and Francis H. Chapelle
Initial Step of Flue Gas Desulfurization—An IR Study of the Reaction of S 0 2 with N 0 X on CaO
Anaerobic oxidation of vinyl chloride by microorganisms, indigenous to organic-rich, stream-bed sediments, involved oxidative acetogenesis followed by acetotrophic methanogenesis and anaerobic respiration.
Tomohiro Ishizuka, Hajime Kabashima, Tsutomu Yamaguchi, Kozo Tanabe, and Hideshi Hattori
2764
IR study of the reaction of NOx with S02 on CaO, a model for flue gas desulfurization, elucidates promotive effect of NO on SOz fixatton.
Toxicity of Chloroform Biotransformation to Methanogenic Bacteria
2804
Lenly J. Weathers and Gene F. Parkin
Substrate Specificity and Ionization Potential in Chloroperoxidase-Catalyzed Oxidation of Diesel Fuel
The toxicity of chloroform biotransformation to unacclimated, aceticlastic methanogenic bacteria is nonlinear with respect to the mass of chloroform transformed. 2768 Carbon Isotope Fractionation during Microbial Dechlorination of Trichloroethene, C/s-1,2-Dichloroethene, and Vinyl Chloride: Implications for Assessment of Natural Attenuation Y. Bloom, R. Aravena, D. Hunkeler, E. Edwards, and S. K. Frape
This study evaluates carbon isotope fractionation during dechlorination of TCE, cis-DCE, ,nd VC ussng a methanogenic microbial enrichment culture.
Marcela Ayala, Norma R. Robledo, Agustin Lopez-Munguia, and Rafael Vazquez-Duhalt
The effect of ionization potential of polyaromatic and organosulfur compounds on the activity of chloroperoxidase from Caldaryomycesfitmaggis studied. 2810 Slurry-Phase Biological Treatment of 2,4-Dinitrotoluene and 2,6-Dinitrotoluene: Role of Bioaugmentation and Effects of High Dinitrotoluene Concentrations Chunlong Zhang, Joseph B. Hughes, Shirley F. Nishino, and Jim C. Spain
Pilot-scale studies demonstrate the ability to degrade 2,4dinitrotoluene and 2,6-dinitrotoluene through a sequential slurry reactor approach. 2 8 6 A • JULY 1, 2000 / ENVIRONMENTAL SCIENCE & TECHNOLOGY / NEWS
Environmental Modeling
2859
•
Tempera-Painted Dosimeters for Environmental Indoor Monitoring: A Spectroscopic and Chemometric Approach
2817
Field Testing a Metal Bioaccumulation Model for Zebra Mussels Hudson A. Roditi, Nicholas S. Fisher, and Sergio A. Safiudo-Wilhelmy
Predictions of metal concentrations in zebra mussel tissues generated by a kinetic model matched independent field measurements in the Great Lakes and three river sites.
Mauro Bacci, Marcello Picollo, Simone Porcinai, and Bruno Radicati
Environmental risk in museums and galleries is comparatively evaluated by means of spectroscopic and chemometric techniques.
Communications Environmental Measurement Methods 2826 Detection of Statistically Significant Trends in Atmospheric Concentrations of Semivolatile Compounds Donald R. Cortes and Ronald A. Hites
It is shown how a detectable half-life, and the length of a study that will find it, can be calculated from the measurement error for a given data set. 2830 Elucidation of Aluminum-Fulvic Acid Interactions by Gas-Phase Hydrogen/Deuterium (H/D) Exchange and Electrospray Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (ESI FT-ICR) A. Alomary, T. Solouki, H. H. Patterson, and C. S. Cronan
H/D exchange reactions and ion isolation/ion storage capabilities of a (FT-ICR) mass spectrometer are utilized to study metal complexation in fulvic acid samples at a molecular level. 2839 Determination of Compound-Specific Carbon Isotope Ratios of Chlorinated Methanes, Ethanes, and Ethenes in Aqueous Samples Daniel Hunkeler and Ramon Aravena
The accuracy, precision, and sensitivity of compound-specific carbon isotope analysis is evaluated for chlorinated solvents using direct SPME, headspace SPME, and headspace equilibration. 2845 Automated Fiber Optic Biosensor for Multiplexed Immunoassays Keeley D. King, Jessica M. Vanniere, Jennifer L. LeBlanc, Karen E. Bullock, and George P. Anderson
Multianalyte capability of RAPTOR, an automated fiber optic biosensor, is demonstrated during a trial assaying 144 blind samples, 10 min each with no false positives.
2866 Stable Chlorine Isotopic Compositions of Aroclors and Aroclor-Contaminated Sediments Christopher M. Reddy, Linnea J. Heraty, Ben D. Holt, Neil C. Sturchio, Timothy I. Eglinton, Nicholas J. Drenzek, Li Xu, James L. Lake, and Keith A. Maruya
Stable chlorine isotopic compositions of Aroclors and Aroclor-contaminated sediments were investigated to explore their usage in studying processes that act on polychlorinated biphenyls.
Correspondence 2871 Comment on "Delayed Deposition of Organochlorine Pesticides at a Temperate Glacier" Dennis J. Gregor and Andrew J. Peters
2873 Response to Comment on "Delayed Deposition of Organochlorine Pesticides in a Temperate Glacier" David B. Donald, Jim Syrgiannis, Robert W. Crosley, Gerald Holdsworth, Derek C. G. Muir, Bruno Rosenberg, Albi Sole, and David W. Schindler
2875 Comment on "Nighttime Tropospheric Chemistry: Kinetics and Product Studies in the Reaction of 4-Alkyland 4-Alkoxytoluenes with N0 3 in Gas Phase" T. J. Wallington, L. Frosig, and 0. J. Nielsen
2876 Response to Comment on "Nighttime Tropospheric Chemistry: Kinetics and Product Studies in the Reaction of 4-Alkyl- and 4-Alkoxytoluenes with N0 3 in Gas Phase" Ezio Bolzacchini, Simone Meinardi, Marco Orlandi, Bruno Rindone, Jens Hjorth, and Giambattista Restelli
• 2851 Multicomponent Remote Sensing of Vehicle Exhaust by Dispersive Absorption Spectroscopy. 1. Effect of Fuel Type and Catalyst Performance Marc M. Baum, Eileen S. Kiyomiya, Sasi Kumar, Anastasios M. Lappas, and Harry C. Lord, III
A novel remote sensor is used to noninvasively measure over 20 pollutants in the exhaust of 19 in-use vehicles powered by a range of fuels.
Additions and Corrections 2878 Comment on "In Situ Measurements of Chlorinated Hydrocarbons in the Water Column off the Palos Verdes Peninsula, California" S. C. Paulsen, E. J. List, and P. H. Santschi
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