natural sources of water contain some halogenated organic compounds after disinfection by chlorine. trihalomethanes are one group of the chlorination by products that suspected of being carcinogenic inhuman unfortunately, these compounds are in finished water of all treatment plants that use chlorine as a disinfectant. in this study, the concentration of total thms of water treated in the water...

Genetic Engineering of a Radiation-Resistant Bacterium for Biodegradation of Mixed Wastes July 25, 2000 Lead Principal Investigator: Prof. Mary E. Lidstrom University of Washington Departments of Chemical Engineering and Microbiology Box 351750 Seattle WA 98195-1750 (206)616-5282 [email protected] Graduate students/post-docs: 3 DOE Problems: above-ground bioremediation treatment systems...

The presence and transformation of volatile halogenated organics in wastewaters after treatment with monochloramine have been examined using an Agilent 7890A GC coupled to an Agilent 7700x ICP-MS. The element-specific bromine and iodine content in this diverse set of organic species have been determined using compound-independent calibrations (CICs) that are based on the elemental responses obt...

Atmospheric studies of halogenated organics have centered on long lived halocarbons due to their effect on stratospheric ozone. Now that controls have been put in place to curb emissions of longer lived halocarbons through the Montreal Protocol, and speculation about the safety of many short-lived chlorinated organic molecules has been raised, there has been more consideration given to the effo...

This study investigated the relationship between physicochemical properties (namely halogen content and hydrophobicity) of halogenated trace organics and their removal efficiencies by a laboratory scale membrane bioreactor (MBR) under stable operating conditions. The reported results demonstrated a combined effect of halogen content and hydrophobicity on the removal. Compounds with high halogen...

Zero valent iron (ZVI; Fe(0)) has been successfully employed for the transformation and subsequent detoxification of a wide range of environmental contaminants, including chlorinated organics, heavy metals, nitroaromatics and, to some degree, perchlorate. The combined use of ZVI plus controlled release carbon has been shown to generate environmental conditions defined herein as in situ chemical...

The co-contamination of soils with heavy metals and organic contaminants is a problem that requires different innovative approach to remediate these kinds sites. nature two contaminant groups makes the complicated. Recently, zero-valent iron nanoparticles (nZVI) application has been integrated bioremediation be used for remediation halogenated organics. However, use this process co-contaminated...