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RECORD NUMBER: 7 OF 10

OLS Field Name OLS Field Data
Main Title Supercritical fluid regeneration of activated carbon for adsorption of pesticides /
Author DeFilippi, R. P. ; Kyukonis, V. J. ; Robey, R. J. ; Modell, M.
Other Authors
Author Title of a Work
DeFilippi, R. P.
CORP Author Little (Arthur D.), Inc., Cambridge, MA.;Industrial Environmental Research Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Industrial Environmental Research Laboratory ; National Technical Information Service [distributor],
Year Published 1980
Report Number EPA-600/2-80-054; EPA-R-804554
Stock Number PB80-197569
OCLC Number 08286672
Subjects Carbon, Activated. ; Particle regeneration (Nuclear physics)
Additional Subjects Activated carbon ; Desorption ; Pesticides ; Water pollution control ; Carbon dioxide ; Regeneration ; Supercritical flow ; Recirculation ; Industrial waste treatment ; Manufacturing ; Materials recovery ; Graphs(Charts) ; Concentration(Composition) ; Design ; Performance evaluation ; Isotherms ; Economic analysis ; Atrazine ; Alachlors
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9101955C.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EHAM  EPA-600/2-80-054 Region 1 Library/Boston,MA 05/25/2016
EJBD ARCHIVE EPA 600-2-80-054 Headquarters Library/Washington,DC 01/22/2014
EJBD  EPA 600-2-80-054 Headquarters Library/Washington,DC 11/14/2014
EKAM  EPA 600/2-80-054 Region 4 Library/Atlanta,GA 02/12/1999
EKBD  EPA-600/2-80-054 Research Triangle Park Library/RTP, NC 07/04/2003
NTIS  PB80-197569 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation x, 187 pages : illustrations ; 28 cm.
Abstract
The report describes the development of a new process for regenerating activated carbon, using supercritical CO2 as a desorbent. Supercritical CO2 in the range of 30-250 C and at pressures > 80 atm. is a good solvent for organics. A series of pesticides was tested for treatment by carbon adsorption and supercritical CO2 regeneration. Alachlor and atrazine, selected for further study, both permitted regeneration over multiple cycles with a low average loss per cycle. All pesticides tested showed a substantial capacity decline (30-plus%) after one generation, but after several cycles both alachlor and atrazine exhibited a stable working capacity. Regeneration is rapid. Water in the carbon pores is not detrimental, at least not at 120 C. Shorter exposure time of carbon to adsorbent resulted in less first-cycle decline. Desorption rates increased increased with temperature, and higher regeneration pressures (150-275 atm.) gave improved regenerability. Treatability studies on a plant sample of atrazine manufacturing wastewater indicated a stable but low working capacity of carbon. Working capacities of 0.05 to 0.08 g TOC per g carbon were obtained at regeneration pressures of 150-275 atm. at 120 C.
Notes
"Arthur D. Little, Inc." "March 1980." Includes bibliographical references (pages 152-155). "Grant no. R804554, program element no. 1BB610."