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Title: DEVELOPMENT OF HUMASORBtm--A COAL DERIVED HUMIC ACID FOR REMOVAL OF METALS AND ORGANIC CONTAMINANTS FROM GROUNDWATER

Abstract

No abstract prepared.

Authors:
; ; ;
Publication Date:
Research Org.:
Federal Energy Technology Center, Morgantown, WV (US); Federal Energy Technology Center, Pittsburgh, PA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
765429
Report Number(s):
DE-AR21-95MC32114-10
TRN: AH200102%%462
DOE Contract Number:
AR21-95MC32114
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 May 2000
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; HUMIC ACIDS; REMOVAL

Citation Formats

Sanjay, H.G., Fataftah, A.K., Walia, D.S., and Srivastava, K.C. DEVELOPMENT OF HUMASORBtm--A COAL DERIVED HUMIC ACID FOR REMOVAL OF METALS AND ORGANIC CONTAMINANTS FROM GROUNDWATER. United States: N. p., 2000. Web. doi:10.2172/765429.
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Sanjay, H.G., Fataftah, A.K., Walia, D.S., & Srivastava, K.C. DEVELOPMENT OF HUMASORBtm--A COAL DERIVED HUMIC ACID FOR REMOVAL OF METALS AND ORGANIC CONTAMINANTS FROM GROUNDWATER. United States. doi:10.2172/765429.
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Sanjay, H.G., Fataftah, A.K., Walia, D.S., and Srivastava, K.C. Mon . "DEVELOPMENT OF HUMASORBtm--A COAL DERIVED HUMIC ACID FOR REMOVAL OF METALS AND ORGANIC CONTAMINANTS FROM GROUNDWATER". United States. doi:10.2172/765429. https://www.osti.gov/servlets/purl/765429.
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@article{osti_765429,
title = {DEVELOPMENT OF HUMASORBtm--A COAL DERIVED HUMIC ACID FOR REMOVAL OF METALS AND ORGANIC CONTAMINANTS FROM GROUNDWATER},
author = {Sanjay, H.G. and Fataftah, A.K. and Walia, D.S. and Srivastava, K.C.},
abstractNote = {No abstract prepared.},
doi = {10.2172/765429},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2000},
month = {Mon May 01 00:00:00 EDT 2000}
}
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Technical Report:
View Technical Report (5.53 MB)
DOI:  10.2172/765429
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  • ; ;
    Heavy metal and organic contamination of surface and groundwater systems is a major environmental concern. The contamination is primarily due to improperly disposed industrial wastes. The presence of toxic heavy metal ions, volatile organic compounds (VOCs) and pesticides in water is of great concern and could affect the safety of drinking water. Decontamination of surface and groundwater can be achieved using a broad spectrum of treatment options such as precipitation, ion-exchange, microbial digestion, membrane separation, activated carbon adsorption, etc. The state of the art technologies for treatment of contaminated water however, can in one pass remediate only one class ofmore » contaminants, i.e., either VOCs (activated carbon) or heavy metals (ion exchange). This would require the use of at a minimum, two different stepwise processes to remediate a site. The groundwater contamination at different Department of Energy (DOE) sites (e.g., Hanford) is due to the presence of both VOCs and heavy metals. The two-step approach increases the cost of remediation. To overcome the sequential treatment of contaminated streams to remove both organics and metals, a novel material having properties to remove both classes of contaminants in one step is being developed as part of this project.« less

  • ; ; ; ...
    Heavy metal and organic contamination of surface and groundwater is a major environmental concern. The contamination is primarily due to improperly disposed industrial wastes. Decontamination of surface and groundwater can be achieved using a broad spectrum of treatment options such as precipitation, ion-exchange, microbial digestion, membrane separation, activated carbon adsorption, etc. The state-of-the-art technologies for treatment of contaminated water, however, can in one pass remediate only one class of contaminants, i.e., either VOCs (activated carbon) or heavy metals( ion-exchange). The groundwater contamination at different Department of Energy (DOE) sites (e.g. Hanford) is due to the presence of both VOCs andmore » heavy metals. Therefore, two different stepwise processes are needed to remediate a site. The two-step approach increases the cost of remediation. A novel material having properties to remove both classes of contaminants in one step is being developed as part of this project. The objective of this project is to develop a lignite derived adsorbent, HUMASORB{sup TM}, to remove heavy metal and organic contaminants from groundwater and surface water streams in one processing step. As part of this project, HUMASORB{sup TM} is being characterized and evaluated for its ion-exchange and adsorption capabilities.« less

  • ; ;
    Heavy metal and organic contamination of surface and groundwater systems is a major environmental concern. The contamination is primarily due to improperly disposed industrial wastes. The presence of toxic heavy metal ions, volatile organic compounds (VOCs) and pesticides in water is of great concern and could affect the safety of drinking water. Decontamination of surface and groundwater can be achieved using a broad spectrum of treatment options such as precipitation, ion-exchange, microbial digestion, membrane separation, activated carbon adsorption, etc. The state of the art technologies for treatment of contaminated water however, can in one pass remediate only one class ofmore » contaminants, i.e., either VOCs (activated carbon) or heavy metals (ion exchange). This would require the use of at a minimum, two different stepwise processes to remediate a site. The groundwater contamination at different Department of Energy (DOE) sites (e.g., Hanford) is due to the presence of both VOCs and heavy metals. The two-step approach increases the cost of remediation. To overcome the sequential treatment of contaminated streams to remove both organics and metals, a novel material having properties to remove both classes of contaminants in one step is being developed as part of this project.The objective of this project is to develop a lignite-derived adsorbent, Humasorb{sup TM} to remove heavy metals and organics from ground water and surface water streams.« less

  • Cation exchangers were prepared by surface oxidizing Missouri bituminous coal with 6 M nitric acid through which air was bubbled. This treatment introduces oxygen-containing functional groups on the coal surface producing an ion exchanger with acid-base properties and the capability of chelating metal ions. The sodium form of the ion exchanger removed sulfuric acid from water raising the pH from 1.5 to more than 8. Ferrous iron at 25 mg/l in pH 1.5 sulfuric acid (simulating acid mine water) was removed to less than 0.2 mg/l by the sodium form of the ion exchanger. A similar solution of ferric ironmore » was lowered from 100 mg/l to about 0.5 mg/l by the same treatment. The treated coal was found to chemically reduce some iron (III) to iron (II). When passed over the acid form of the coal ion exchanger, copper and cadmium levels in neutral solution were lowered from 10 mg/l to 0.01 and 0.00 mg/l, respectively, and from 50 mg/l to 0.02 and 0.01 mg/l respectively. The low ion exchange capacity of surface treated coal limits its usefulness in treating water. Base-soluble coal humic acid has a much higher ion exchange capacity, and work is continuing on its use for wastewater treatment. (GRA)« less

  • 'Graphite nanofibers are a new type of material consisting of nanosized graphite platelets where only edges are exposed. Taking advantage of this unique configuration the authors objective is: (1) To produce graphite nanofibers with structural properties suitable for the removal of contaminants from water. (2) To test the suitability of the material in the removal of organic from aqueous solutions. (3) To determine the ability of the nanofibers to function as an electrochemical separation medium the selective removal of metal contaminants from solutions. This report summarizes work after 1.5 of a 3-year project. During this period, efforts have been concentratedmore » on the production, characterization and optimization of graphite nanofibers (GNF). This novel material has been developed in the laboratory from the metal catalyzed decomposition of certain hydrocarbons (1). The structures possess a cross-sectional area that varies between 5 to 100 nm and have lengths ranging from 5 to 100 mm (2). High-resolution transmission electron microscopy studies have revealed that the nanofibers consist of extremely well-ordered graphite platelets, which are oriented in various directions with respect to the fiber axis (3). The arrangement of the graphene layers can be tailored to a desired geometry by choice of the correct catalyst system and reaction conditions, and it is therefore possible to generate structures where the layers are stacked in a ribbon, herring-bone, or stacked orientation. The research has been directed on two fronts: (a) the use of the material for the removal of organic contaminants, and (b) taking advantage of the high electrical conductivity as well as high surface area of the material to use it as electrode for the electrochemical removal of metal pollutants from aqueous streams.'« less