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11 BIOLOGICAL ACTIVATED CARBON PROCESS FOR REMOVING SULFOLANE FROM GROUNDWATER Donald W. Mcleod, Project Manager Cynthia Y. Lin, Project Scientist TreaTek, Inc. Wei-chi Ying, Scientist Michael E. Tucker, Staff Technician Occidental Chemical Corporation Occidental Chemical Technology Center Grand Island, New York 14072 INTRODUCTION Since mid-1982, Occidental Chemical Corporation (OxyChem) has been operating a groundwater remedial program at a former pesticide manufacturing site in Lathrop, California (Figure 1). The program includes a continuous groundwater extraction system, an activated carbon treatment system (two parallel 40,000 lbs upflow adsorbers) for removing chemicals from the groundwater, and a two- well reinjection system for returning the treated groundwater into a deep (310 ft below the surface) saline aquifer. The target chemicals for this remedial program are the fumigant pesticides dibromo- chloropropane (DBCP) and ethylene dibromide (EDB). The treatment level of below 1 ppb for each fumigant has been consistently met since the start of the remedial program. Along with the fumigants, there is also a detectable level of a compound known as sulfolane (tetramethylene sulfone, see Figure 2) in the groundwater. Sulfolane is an important process chemical for the petroleum and chemical industries. It has outstanding solvent properties for most classes of organic compounds and many common polymers and is chemically and thermally stable. Since sulfolane is soluble in water, it is not effectively removed in the existing carbon adsorption system. Toxicity evaluation conducted during the original design of the remedial program concluded that specific treatment for sulfolane was unnecessary because of no toxicity was expected due to its presence at the low concentration (about 2000 ppb) was found in the groundwater.1 The level of San Francisco CH5 CH, CH Los Angeles Figure 1. Location map of the Lathrop site. CHi Figure 2. Structure of sulfolane. 46th Purdue Industrial Waste Conference Proceedings, 1992 Lewis Publishers, Inc., Chelsea, Michigan 48118. Primed in U.S.A. 99
Object Description
Purdue Identification Number | ETRIWC199111 |
Title | Biological activated carbon process for removing sulfolane from groundwater |
Author |
McLeod, Donald W. Lin, Cynthia Y. Ying, Wei-Chi Tucker, Michael E. |
Date of Original | 1991 |
Conference Title | Proceedings of the 46th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,42649 |
Extent of Original | p. 99-112 |
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 | 2009-11-24 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 99 |
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 | 11 BIOLOGICAL ACTIVATED CARBON PROCESS FOR REMOVING SULFOLANE FROM GROUNDWATER Donald W. Mcleod, Project Manager Cynthia Y. Lin, Project Scientist TreaTek, Inc. Wei-chi Ying, Scientist Michael E. Tucker, Staff Technician Occidental Chemical Corporation Occidental Chemical Technology Center Grand Island, New York 14072 INTRODUCTION Since mid-1982, Occidental Chemical Corporation (OxyChem) has been operating a groundwater remedial program at a former pesticide manufacturing site in Lathrop, California (Figure 1). The program includes a continuous groundwater extraction system, an activated carbon treatment system (two parallel 40,000 lbs upflow adsorbers) for removing chemicals from the groundwater, and a two- well reinjection system for returning the treated groundwater into a deep (310 ft below the surface) saline aquifer. The target chemicals for this remedial program are the fumigant pesticides dibromo- chloropropane (DBCP) and ethylene dibromide (EDB). The treatment level of below 1 ppb for each fumigant has been consistently met since the start of the remedial program. Along with the fumigants, there is also a detectable level of a compound known as sulfolane (tetramethylene sulfone, see Figure 2) in the groundwater. Sulfolane is an important process chemical for the petroleum and chemical industries. It has outstanding solvent properties for most classes of organic compounds and many common polymers and is chemically and thermally stable. Since sulfolane is soluble in water, it is not effectively removed in the existing carbon adsorption system. Toxicity evaluation conducted during the original design of the remedial program concluded that specific treatment for sulfolane was unnecessary because of no toxicity was expected due to its presence at the low concentration (about 2000 ppb) was found in the groundwater.1 The level of San Francisco CH5 CH, CH Los Angeles Figure 1. Location map of the Lathrop site. CHi Figure 2. Structure of sulfolane. 46th Purdue Industrial Waste Conference Proceedings, 1992 Lewis Publishers, Inc., Chelsea, Michigan 48118. Primed in U.S.A. 99 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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