Record Display for the EPA National Library Catalog


Main Title MEXAMS--the metals exposure analysis modeling system /
Author Felmy, A. R. ; Brown, S. M. ; Onishi, Y. ; Yabusaki, S. B. ; Argo, R. S. ;
Other Authors
Author Title of a Work
Felmy, A. R.
CORP Author Battelle Pacific Northwest Labs., Richland, WA.;Environmental Research Lab., Athens, GA. Technology Development and Applications Branch.
Publisher U.S. Environmental Protection Agency,
Year Published 1984
Report Number EPA/600/3-84/031; EPA-68-03-3089
Stock Number PB84-157155
OCLC Number 11937639
Subjects Metals--Environmental aspects--Computer programs ; Water--Pollution--Computer programs ; Water quality--Computer programs
Additional Subjects Metals ; Water pollution ; Mathematical models ; Environmental surveys ; Thermodynamics ; Concentration(Composition) ; Transport properties ; Adsorption ; Environmental impacts ; Activity coefficients ; Surfaces ; Revisions ; Guidelines ; Computer programming ; Computer programs ; Solid phases ; Metals exposure analysis models ; Water quality ; Path of pollutants ; MINTEQ computer program
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-3-84-031 Headquarters Library/Washington,DC 03/26/2014
ELBD RPS EPA 600-3-84-031 repository copy AWBERC Library/Cincinnati,OH 09/30/2019
ESAD  EPA 600-3-84-031 Region 10 Library/Seattle,WA 05/23/2011
NTIS  PB84-157155 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xi, 173 pages ; 28 cm
MEXAMS, the Metals Exposure Analysis Modeling System, provides an enhanced capability for assessing the impact of priority pollutant metals on aquatic systems. It allows the user to consider the complex chemistry affecting the behavior of metals in conjunction with the transport processes that affect their migration and fate. This is accomplished by linking MINTEQ, a geochemical model, with EXAMS, an aquatic exposure assessment model. MINTEQ is a thermodynamic equilibrium model that computes aqueous speciation, adsorption and precipitation/dissolution of solid phases. It has a well-documented thermodynamic data base that contains equilibrium constants and other accessory data for seven priority pollutant metals: arsenic, cadmium, copper, lead, nickel, silver and zinc. The model was developed by combining the best features of two other existing geochemical models MINEQL and WATEQ3. EXAMS is designed for the rapid evaluation of synthetic organic pollutants. Given the characteristics of a pollutant and an aquatic system, EXAMS computes steady-state pollutant concentrations (exposure), the distribution of the pollutant in the system (fate), and the time required for effective purification of the system (persistence). Its linkage to MINTEQ required several modifications. To facilitate the use of MEXAMS, a user interactive program was developed. This program queries the user to obtain water quality data for MINTEQ, then controls the operation of MINTEQ and EXAMS, passing simulation results back and forth between the models.
Funded wholly or in part by the United States Environmental Protection Agency to Battelle, Pacific Northwest Laboratories. Contract Number: 68-03-3089. Includes bibliographical references (pages 146-149).