Anaerobic Biodegradation of Mixtures of Chlorinated Solvents PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Anaerobic Biodegradation of Mixtures of Chlorinated Solvents PDF full book. Access full book title Anaerobic Biodegradation of Mixtures of Chlorinated Solvents by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Vasilios Kaseros
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
The widespread contamination of groundwater with mixtures of chlorinated hydrocarbons poses a health threat and an obligation to the landowner to remediate this threat. Organic solvents such as tetrachloroethene (PCE) and carbon tetrachloride (CT) are frequently found on contaminated sites and as suspected carcinogens must be removed from the environment. The objective of this study was to determine the susceptibility of mixtures of PCE and CT to biological reductive dechlorination. Using microcosms and a continuous column the impact of CT degradation on the degradation of a PCE was examined. Using an ethanol/PCE enrichment culture the effect of CT and its degradation products, chloroform (CF) and dichloromethane (DCM), on the degradation of PCE was examined. In microcosms 5 mg/L CT totally inhibited the degradation of PCE. Full PCE degradation to cis-DCE did occur after the bottles were purged with nitrogen and PCE was applied in the absence of CT. In the column studies the addition of 0.5 mg/L CT totally suspended PCE degradation for 24 days. The biodegradation of organic solvents can be an effective way to eliminate possible human health threats, however extra care must be taken when dealing with mixtures of organic solvents. (Abstract shortened by UMI.).
Author: Robert E. Hinchee
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 360
Get Book Here
Book Description
Soil and groundwater contamination stemming from the release of various chlorinated compounds into the environment is a significant and difficult site remediation challenge. The articles in this collection discuss the use of aerobic and anaerobic biological degradation to dehalogenate sites contaminated with pesticides and chlorinated solvents such as trichloroethylene, tetrachloroethene, tetrachloromethene, perchloroethylene, carbon tetrachloride, pentachlorophenol, and chlorinated benzene. Bench- and field-scale studies of the biological processes associated with in situ dechlorination of soil and aquifers are described. Discussed are the uses of microcosm studies and numerical simulation of dechlorination to manage system operation. Site characteristics (e.g., hydraulic properties, temperature, nitrogen availability) and their effect on the stability of the methanotrophic community are examined. Methods discussed include the use of air venting, alternative electron donors, biofilm reactors, surfactants, municipal digester sludge, iron enhancement, and sulfate reduction to improve conditions for the microbial consortia that effect dechlorination.
Author:
Publisher: DIANE Publishing
ISBN:
Category : In situ bioremediation
Languages : en
Pages : 152
Get Book Here
Book Description
Author: Perry L. McCarty
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Get Book Here
Book Description
The anaerobic biodegradation of chlorinated solvents is of great interest both for natural attenuation and for engineered remediation of these hazardous contaminants in groundwater. Compounds to be studied are carbon tetrachloride (CT) and the chlorinated ethenes, tetrachloroethene (PCE), trichloroethene (TCE) cis-1,2-dichloroethene (cDCE), and vinyl chloride (VC). The chlorinated solvents often are present as dense non-aqueous-phase liquids (DNAPLs), which are difficult to remove. Biodegradation of DNAPLs was previously thought not possible because of toxicity, but recent evidence indicates that under the right conditions, biodegradation is possible. Anaerobic biodegradation of DNAPLs is the major subject of this research. The specific objectives of this multi-investigator effort are: (1) Evaluate the potential for chlorinated solvent biodegradation near DNAPLs, (2) Provide a molecular understanding of the biological mechanisms involved, (3) Determine cellular components involved in carbon tetrachloride transformation by Pseudomonas stutzeri strain KC without chloroform formation.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Get Book Here
Book Description
The anaerobic biodegradation of chlorinated solvents is of great interest both for natural attenuation and for engineered remediation of these hazardous contaminants in groundwater. Compounds to be studied are carbon tetrachloride (CT) and the chlorinated ethenes, tetrachloroethene (PCE), trichloroethene (TCE) cis-1,2-dichloroethene (cDCE), and vinyl chloride (VC). The chlorinated solvents often are present as dense non-aqueous-phase liquids (DNAPLs), which are difficult to remove. Biodegradation of DNAPLs was previously thought not possible because of toxicity, but recent evidence indicates that under the right conditions, biodegradation is possible. Anaerobic biodegradation of DNAPLs is the major subject of this research. The specific objectives of this multi-investigator effort are: (1) Evaluate the potential for chlorinated solvent biodegradation near DNAPLs, (2) Provide a molecular understanding of the biological mechanisms involved, (3) Determine cellular components involved in carbon tetrachloride transformation by Pseudomonas stutzeri strain KC without chloroform formation.
Author:
Publisher: DIANE Publishing
ISBN: 1428903151
Category :
Languages : en
Pages : 38
Get Book Here
Book Description
Author: Victor Magar
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 408
Get Book Here
Book Description
The symposium included 600 presentations in 50 sessions on bioremediation and supporting technologies used for a wide range of contaminants already in, or poised to invade, soil, groundwater, and sediment. Three hundred and fifty-two papers were selected and organized into ten volumes. Volume seven's articles examine the use of enhanced anaerobic biotransformation processes for treatment of chlorinated solvents in soil and groundwater. Electron donors used to stimulate reductive dechlorination processes in lab- and field-scale demonstrations are also presented. Articles average eight pages, and contain abstracts and references. Annotation copyrighted by Book News Inc., Portland, OR.
Author: Cecilia Vargas
Publisher:
ISBN:
Category : Biodegradation
Languages : en
Pages : 214
Get Book Here
Book Description
Author: Battelle Memorial In
Publisher: CRC Press
ISBN: 9780873719834
Category : Science
Languages : en
Pages : 548
Get Book Here
Book Description
This timely reference presents the state of the art of the emerging and rapidly changing field of bioremediation of chlorinated solvents, PCBs, and other chlorinated compounds, as well as PAHs, both in situ and on site. This landmark publication reports significant advances in bioremediation, with an emphasis on practical applications and state-of-the-art developments. Laboratory and field-oriented reviews are presented with the objective of tying treatability studies and recent laboratory developments to field applications. No other reference source gives you access to the most current techniques and methods for the bioremediation of chlorinated and polycyclic aromatic hydrocarbon compounds. This book represents the work of leading experts in the fields of in situ and on-site bioremediation from North America, Europe, and Asia. The chapters include current field applications and laboratory studies undertaken, in some cases, in countries with regulatory standards more stringent than those of the United States.
