Author: William Chih-Wen Chang
Publisher:
ISBN:
Category : Solvent extraction
Languages : en
Pages : 136
Book Description
"The objective of this investigation was to evaluate the use of batch type solvent extraction and freeze concentration in recovering trace organic pollutants from water. The work was performed using a simplified water system containing known concentrations of phenol, and natural water systems collected from three sources (Meramec Spring, Gasconade River near Jerome, and Missouri River in Jefferson City) with different levels of pollution. The simplified water system was used to evaluate the effect of the number of extractions, solvent to sample ratio, extraction time, initial organic concentration, pH, and turbidity on solvent extraction; and the effect of volumetric concentration and flash freezing on freeze concentration. The natural water systems were employed to evaluate the practical application of the method, and emphasis was placed on the selection and sequence of solvents, pH adjustment, and effect of turbidity. Benzene and chloroform were the solvents used. The proper selection of solvents and the solvent to sample ratio were the most important factors in the solvent extraction method; the number of sequential extractions and pH adjustment were also important variables. Serial extraction with chloroform and benzene yielded a larger recovery at natural pH than extraction with benzene and chloroform; and extraction with chloroform sequentially at pH 4 and 10 produced a greater recovery than extraction with benzene. The concentration of trace organics in spring and river water was subject to significant seasonal variation. The efficiency of phenol recovery by freeze concentration depended on the volumetric concentration ratio and almost complete recovery was obtained at ratios ranging from 6 to 9"--Abstract, leaf ii.
Recovery of Trace Organic Pollutants by Solvent Extraction and Freeze Concentration
Author: William Chih-Wen Chang
Publisher:
ISBN:
Category : Solvent extraction
Languages : en
Pages : 136
Book Description
"The objective of this investigation was to evaluate the use of batch type solvent extraction and freeze concentration in recovering trace organic pollutants from water. The work was performed using a simplified water system containing known concentrations of phenol, and natural water systems collected from three sources (Meramec Spring, Gasconade River near Jerome, and Missouri River in Jefferson City) with different levels of pollution. The simplified water system was used to evaluate the effect of the number of extractions, solvent to sample ratio, extraction time, initial organic concentration, pH, and turbidity on solvent extraction; and the effect of volumetric concentration and flash freezing on freeze concentration. The natural water systems were employed to evaluate the practical application of the method, and emphasis was placed on the selection and sequence of solvents, pH adjustment, and effect of turbidity. Benzene and chloroform were the solvents used. The proper selection of solvents and the solvent to sample ratio were the most important factors in the solvent extraction method; the number of sequential extractions and pH adjustment were also important variables. Serial extraction with chloroform and benzene yielded a larger recovery at natural pH than extraction with benzene and chloroform; and extraction with chloroform sequentially at pH 4 and 10 produced a greater recovery than extraction with benzene. The concentration of trace organics in spring and river water was subject to significant seasonal variation. The efficiency of phenol recovery by freeze concentration depended on the volumetric concentration ratio and almost complete recovery was obtained at ratios ranging from 6 to 9"--Abstract, leaf ii.
Publisher:
ISBN:
Category : Solvent extraction
Languages : en
Pages : 136
Book Description
"The objective of this investigation was to evaluate the use of batch type solvent extraction and freeze concentration in recovering trace organic pollutants from water. The work was performed using a simplified water system containing known concentrations of phenol, and natural water systems collected from three sources (Meramec Spring, Gasconade River near Jerome, and Missouri River in Jefferson City) with different levels of pollution. The simplified water system was used to evaluate the effect of the number of extractions, solvent to sample ratio, extraction time, initial organic concentration, pH, and turbidity on solvent extraction; and the effect of volumetric concentration and flash freezing on freeze concentration. The natural water systems were employed to evaluate the practical application of the method, and emphasis was placed on the selection and sequence of solvents, pH adjustment, and effect of turbidity. Benzene and chloroform were the solvents used. The proper selection of solvents and the solvent to sample ratio were the most important factors in the solvent extraction method; the number of sequential extractions and pH adjustment were also important variables. Serial extraction with chloroform and benzene yielded a larger recovery at natural pH than extraction with benzene and chloroform; and extraction with chloroform sequentially at pH 4 and 10 produced a greater recovery than extraction with benzene. The concentration of trace organics in spring and river water was subject to significant seasonal variation. The efficiency of phenol recovery by freeze concentration depended on the volumetric concentration ratio and almost complete recovery was obtained at ratios ranging from 6 to 9"--Abstract, leaf ii.
Abstracts of Theses
Author: University of Missouri at Rolla
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 172
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 172
Book Description
Recovery of Organic Pollutants from Industrial Wastewaters by Solvent Extraction
Author: Gilbert Wayne Sanchez
Publisher:
ISBN:
Category :
Languages : en
Pages : 426
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 426
Book Description
Recovery of Organic Pollutants from Industrial Waste Water by Solvent Extraction
Author: Jonathan P. Earhart
Publisher:
ISBN:
Category : Organic wastes
Languages : en
Pages : 940
Book Description
Publisher:
ISBN:
Category : Organic wastes
Languages : en
Pages : 940
Book Description
Extraction Or Destruction of Chemical Pollutants from Aqueous Waste Streams
Author: R. R. Davison
Publisher:
ISBN:
Category : Chlorinated hydrocarbons
Languages : en
Pages : 74
Book Description
Publisher:
ISBN:
Category : Chlorinated hydrocarbons
Languages : en
Pages : 74
Book Description
Guide to Conducting Treatability Studies Under CERCLA
Author:
Publisher:
ISBN:
Category : Hazardous waste site remediation
Languages : en
Pages : 76
Book Description
Publisher:
ISBN:
Category : Hazardous waste site remediation
Languages : en
Pages : 76
Book Description
Analysis of Trace Organics in the Aquatic Environment
Author: B. K. Afghan
Publisher: CRC Press
ISBN: 1351369180
Category : Science
Languages : en
Pages : 352
Book Description
A supplement to previous books edited by Afgan and Chau, this publication covers the practical aspects of analytical methodology for trace organics. The book reviews the published work on the occurance, distribution, fate, effect, and environmental impact of specific classes of compounds. Essential background information emphasizing practical aspects of various methods with respect to advantages and disadvantages of the published methods is also discussed.
Publisher: CRC Press
ISBN: 1351369180
Category : Science
Languages : en
Pages : 352
Book Description
A supplement to previous books edited by Afgan and Chau, this publication covers the practical aspects of analytical methodology for trace organics. The book reviews the published work on the occurance, distribution, fate, effect, and environmental impact of specific classes of compounds. Essential background information emphasizing practical aspects of various methods with respect to advantages and disadvantages of the published methods is also discussed.
Recovery of Trace Organic Pollutants from Natural Waters Using Macroporus Resins
Author: Donald J. Hughes
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 286
Book Description
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 286
Book Description
Ecological Research Series
Author:
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 324
Book Description
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 324
Book Description
Proceedings of the ... Industrial Waste Conference
Author:
Publisher:
ISBN:
Category : Factory and trade waste
Languages : en
Pages : 568
Book Description
Publisher:
ISBN:
Category : Factory and trade waste
Languages : en
Pages : 568
Book Description