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Biological process for the treatment...

Bradley, Stephen Naegeli.

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Biological process for the treatment of water contaminated with 2,4-dichlorophenoxyacetic acid.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Biological process for the treatment of water contaminated with 2,4-dichlorophenoxyacetic acid./
作者:	Bradley, Stephen Naegeli.
面頁冊數:	97 p.
附註:	Source: Dissertation Abstracts International, Volume: 57-08, Section: B, page: 4867.
Contained By:	Dissertation Abstracts International57-08B.
標題:	Biology, Microbiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9700065
ISBN:	0591061619

Biological process for the treatment of water contaminated with 2,4-dichlorophenoxyacetic acid.
Bradley, Stephen Naegeli.

Biological process for the treatment of water contaminated with 2,4-dichlorophenoxyacetic acid. - 97 p.

Source: Dissertation Abstracts International, Volume: 57-08, Section: B, page: 4867.

Thesis (Ph.D.)--University of Idaho, 1996.

Pesticides and herbicides used in agriculture are the classic example of anthropogenic chemicals that enter the Earth's environment in large amounts via non-point sources. These compounds can adversely affect non-target organisms and may be detrimental to human health if people are exposed to residues of the molecules in food, water, or agricultural products. The longer such chemicals persist in the environment, the greater the chance of their causing harm. Thus, scientists have long recognized the need to study degradative processes, particularly biodegradation, that transform these molecules in the environment. This work was undertaken in order to develop a means of decontaminating and detecting herbicide-contaminated water. This following dissertation focuses on the development of a biological treatment system for 2,4-dichlorophenoxyacetic acid (2,4-D)-contaminated wastewater.

ISBN: 0591061619Subjects--Topical Terms:

1017734
Biology, Microbiology.

Biological process for the treatment of water contaminated with 2,4-dichlorophenoxyacetic acid.
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245 1 0 $a Biological process for the treatment of water contaminated with 2,4-dichlorophenoxyacetic acid.
300 $a 97 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-08, Section: B, page: 4867.
500 $a Major Professor: Ronald L. Crawford.
502 $a Thesis (Ph.D.)--University of Idaho, 1996.
520 $a Pesticides and herbicides used in agriculture are the classic example of anthropogenic chemicals that enter the Earth's environment in large amounts via non-point sources. These compounds can adversely affect non-target organisms and may be detrimental to human health if people are exposed to residues of the molecules in food, water, or agricultural products. The longer such chemicals persist in the environment, the greater the chance of their causing harm. Thus, scientists have long recognized the need to study degradative processes, particularly biodegradation, that transform these molecules in the environment. This work was undertaken in order to develop a means of decontaminating and detecting herbicide-contaminated water. This following dissertation focuses on the development of a biological treatment system for 2,4-dichlorophenoxyacetic acid (2,4-D)-contaminated wastewater.
520 $a An aerobic biological process to degrade 2,4-dichlorophenoxyacetic acid (2,4-D) found in used containers and/or agricultural wastewaters was developed. The process was designed to be used in the field, where 2,4-D is sprayed, formulated, and applied. The treatment system employs a stabilized preparation of 2,4-D-degrading bacteria that can utilize the herbicide as a carbon source, mineralizing it to CO $\ sb2 $, H $\ sb2
520 $a An enzymatic system that can be used to detect 2,4-D in water samples was also developed. The system is based on the stoichiometric conversion of 2,4-D to 2,4-dichlorophenol by 2,4-D $\ alpha $- ketoglutarate-dependent dioxygenase. The dichlorophenol is then detected colorimetrically through the Emerson reaction with 4-aminoantipyrine. The dioxygenase was immobilized on plastic for packaging in a kit along with other required reagents. The kit, designed to be used in the field without specialized equipment, was conveniently packaged in an inexpensive dried form having a long shelf life. A prototype system was tested and shown to work effectively for its designed purpose.
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792 $a 1996
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