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Main Title Facilitated transport of inorganic contaminants in ground water. Part II, Colloidal transport /
Author Puls, R. W. ; Powell, R. M. ; Clark, D. A. ; Paul, C. J.
Other Authors
Author Title of a Work
Puls, Robert W.
CORP Author Robert S. Kerr Environmental Research Lab., Ada, OK. ;ManTech Environmental Technology, Inc., Ada, OK.
Publisher U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory,
Year Published 1991
Report Number EPA/600-M-91-040
Stock Number PB92-114503
OCLC Number 24817085
Subjects Groundwater--Pollution--Arizona ; Groundwater--Pollution--Maine ; Groundwater--Pollution--North Carolina ; Water, Underground--Pollution--Arizona
Additional Subjects Water pollution sampling ; Inorganic compounds ; Environmental transport ; Colloids ; Ground water ; Field tests ; Geochemistry ; Tracer techniques ; Water flow ; Desorption ; Adsorption ; Path of pollutants ; Samples ; Particle size ; Experimental design ; Electrolytes ; pH ; Flow rate
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  TD403EPA 600 M-91-040 Region 1 Library/Boston,MA 04/29/2016
EJBD  EPA 600-M-91-040 c.1 Headquarters Library/Washington,DC 05/02/2014
ELBD ARCHIVE EPA 600-M-91-040 In Binder Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD RPS EPA 600-M-91-040 repository copy AWBERC Library/Cincinnati,OH 10/17/2014
EMBD  EPA/600/M-91/040 NRMRL/GWERD Library/Ada,OK 06/27/2003
NTIS  PB92-114503 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12 pages : illustrations ; 28 cm.
The project entailed both field and laboratory components. Field studies evaluated routine sampling procedures for determination of aqueous inorganic geochemistry and assessment of contaminant transport by colloidal mobility. Research at three different metal-contaminated sites has shown that 0.45 micrometer filtration has not removed potentially mobile colloids, when samples have been collected using low pumping flow rates (approximately 0.2-0.3 L/min). However, when pumping velocities greatly exceed formation groundwater flow velocities, large differences between filtered and unfiltered samples are observed, and neither are representative of values obtaine with the llow flow-rate pumped samples. In controlled laboratory experiments, the stability and transport of radio-labeled Fe2O3 model colloids were studied using batch and column techniques. Variables in the study included flow rate, pH, ionic strength, electrolyte composition (anion/cation), colloid concentration, and colloid size. Iron oxide colloids in the 100-900 nm particle diameter range were not only mobile to a significant extent, but under some hydrogeochemical conditions were transported faster than a conservative tracer, tritium. Particle size and anionic composition together with particle stability provided the highest statistical correlation governing extent of colloidal transport. The rate of colloid-arsenate transport was over 21 times that of the dissolved arsenate.
Caption title. Shipping list no.: 91-586-P. "July 1991." Includes bibliographical references (pages 11-12). "EPA/600-M-91-040."