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REMOVAL OF SELECTED TRACE ELEMENTS FROM ACID MINE DRAINAGE USING EXISTING TECHNOLOGY Roger C. Wilmoth, Sanitary Engineer Thomas L. Baugh, Engineer Dean Wm. Decker, Biologist Extraction Technology Branch Industrial Environmental Research Laboratory U.S. Environmental Protection Agency Cincinnati, Ohio 45268 INTRODUCTION The presence of trace elements in acid mine drainage (AMD) has received little attention in the past; however, recent cognizance has prompted the research community to address the situation. AMD offers a favorable medium for existence of trace elements because many are acid-soluble and are leached from strata associated with the mining process. Some trace elements are on the U.S. Environmental Protection Agency list of Priority Pollutants. The purpose of this study was to determine the effectiveness of lime neutralization, reverse osmosis, and ion exchange treatment processes in removing several of the trace elements. The study was conducted at the EPA Crown Field Site, which is located near Morgantown, West Virginia. At Crown, appropriate concentrations of trace elements could be injected into a moderately acid AMD stream to simulate the field situation. The selection of the parameters to be studied and their respective concentrations was made on the basis of levels found in mine discharges. Table I illustrates the matrix of data used in the selection. These choices are summarized in Table II. Eight of the 10 are listed by EPA as toxic substances. For this study the 10 compounds were combined in one concentrated bulk solution and were continuously injected into the AMD feed streams to the neutralization, reverse osmosis, and ion exchange processes to form the desired concentrations. Some precipitation problems were encountered during lab-scale concentrate preparation, necessitating substituting different compound forms of two elements and eliminating lead from the original study list. Table II contains the final choice of compounds. TREATMENT STUDIES Background Information Lime neutralization, reverse osmosis, and ion exchange were studied to determine their effectiveness in removing the 10 trace elements of interest. EPA awarded a contract to Hydroscience, Inc., a subsidiary of Dow Chemical, to provide analytical services for the trace element analyses and to provide technical assistance. Most of the work summarized in this paper was excerpted from an upcoming final report by Wilmoth, Scott, Hall, and Stuewe, which will be published early in 1979. EPA Methods were 886
Object Description
Purdue Identification Number | ETRIWC1978093 |
Title | Removal of selected trace elements from acid mine drainage using existing technology |
Author |
Wilmoth, Roger C. Baugh, Thomas L. Decker, Dean Wm |
Date of Original | 1978 |
Conference Title | Proceedings of the 33rd Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,27312 |
Extent of Original | p. 886-894 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University LIbraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2009-06-22 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page0886 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | REMOVAL OF SELECTED TRACE ELEMENTS FROM ACID MINE DRAINAGE USING EXISTING TECHNOLOGY Roger C. Wilmoth, Sanitary Engineer Thomas L. Baugh, Engineer Dean Wm. Decker, Biologist Extraction Technology Branch Industrial Environmental Research Laboratory U.S. Environmental Protection Agency Cincinnati, Ohio 45268 INTRODUCTION The presence of trace elements in acid mine drainage (AMD) has received little attention in the past; however, recent cognizance has prompted the research community to address the situation. AMD offers a favorable medium for existence of trace elements because many are acid-soluble and are leached from strata associated with the mining process. Some trace elements are on the U.S. Environmental Protection Agency list of Priority Pollutants. The purpose of this study was to determine the effectiveness of lime neutralization, reverse osmosis, and ion exchange treatment processes in removing several of the trace elements. The study was conducted at the EPA Crown Field Site, which is located near Morgantown, West Virginia. At Crown, appropriate concentrations of trace elements could be injected into a moderately acid AMD stream to simulate the field situation. The selection of the parameters to be studied and their respective concentrations was made on the basis of levels found in mine discharges. Table I illustrates the matrix of data used in the selection. These choices are summarized in Table II. Eight of the 10 are listed by EPA as toxic substances. For this study the 10 compounds were combined in one concentrated bulk solution and were continuously injected into the AMD feed streams to the neutralization, reverse osmosis, and ion exchange processes to form the desired concentrations. Some precipitation problems were encountered during lab-scale concentrate preparation, necessitating substituting different compound forms of two elements and eliminating lead from the original study list. Table II contains the final choice of compounds. TREATMENT STUDIES Background Information Lime neutralization, reverse osmosis, and ion exchange were studied to determine their effectiveness in removing the 10 trace elements of interest. EPA awarded a contract to Hydroscience, Inc., a subsidiary of Dow Chemical, to provide analytical services for the trace element analyses and to provide technical assistance. Most of the work summarized in this paper was excerpted from an upcoming final report by Wilmoth, Scott, Hall, and Stuewe, which will be published early in 1979. EPA Methods were 886 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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