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Subtask 1.5 - Activated Carbon from Lignite for Water Treatment.

DE2004824974

Publication Date	2000
Personal Author	Olson, E. S.; Stepan, D. J.
Page Count	24
Abstract	High concentrations of humate in surface water result in the formation of excess amounts of chlorinated byproducts during disinfection treatment. These precursors can be removed in water treatment prior to disinfection using powdered activated carbon. In the interest of developing a more cost-effective method for removal of humates in surface water, a comparison of the activities of carbons prepared from North Dakota lignites with those of commercial carbons was conducted. Previous studies indicated that a commercial carbon prepared from Texas lignite (Darco HDB) was superior to those prepared from bituminous coals for water treatment. That the high alkali content of North Dakota lignites would result in favorable adsorptive properties for the very large humate molecules was hypothesized, owing to the formation of larger pores during activation. Since no standard humate test has been previously developed, initial adsorption testing was performed using smaller dye molecules with various types of ionic character.
Keywords	Lignite Water treatment Activated carbon Adsorption Bituminous coal Dyes Humic acids Hydroxides Methyl red Methylene blue Sorption Sterilization Surface waters
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	North Dakota Univ., Grand Forks. Energy and Environmental Research Center.; National Energy Technology Lab., Pittsburgh, PA.
Supplemental Notes	Sponsored by National Energy Technology Lab., Pittsburgh, PA.
Document Type	Technical Report
NTIS Issue Number	200507

Subtask 1.5 - Activated Carbon from Lignite for Water Treatment.

Subtask 1.5 - Activated Carbon from Lignite for Water Treatment.
DE2004824974

Publication Date	2000
Personal Author	Olson, E. S.; Stepan, D. J.
Page Count	24
Abstract	High concentrations of humate in surface water result in the formation of excess amounts of chlorinated byproducts during disinfection treatment. These precursors can be removed in water treatment prior to disinfection using powdered activated carbon. In the interest of developing a more cost-effective method for removal of humates in surface water, a comparison of the activities of carbons prepared from North Dakota lignites with those of commercial carbons was conducted. Previous studies indicated that a commercial carbon prepared from Texas lignite (Darco HDB) was superior to those prepared from bituminous coals for water treatment. That the high alkali content of North Dakota lignites would result in favorable adsorptive properties for the very large humate molecules was hypothesized, owing to the formation of larger pores during activation. Since no standard humate test has been previously developed, initial adsorption testing was performed using smaller dye molecules with various types of ionic character.
Keywords	Lignite Water treatment Activated carbon Adsorption Bituminous coal Dyes Humic acids Hydroxides Methyl red Methylene blue Sorption Sterilization Surface waters
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	North Dakota Univ., Grand Forks. Energy and Environmental Research Center.; National Energy Technology Lab., Pittsburgh, PA.
Supplemental Notes	Sponsored by National Energy Technology Lab., Pittsburgh, PA.
Document Type	Technical Report
NTIS Issue Number	200507