Adsorption of hydantoins on activated carbon

Technical Report · Wed May 01 04:00:00 EDT 1985

OSTI ID:6293181

Brandt, J C

A carbon absorption study was performed using hydantoin, 5-5-dimethylhydantoin, and 5-ethyl-5-methylhydantoin as solutes. The study included single-solute batch kinetic tests to determine the required elapsed time for each solute to reach solution equilibrium with Filtrasorb 400 activated carbon. Single solute isotherm tests were performed to establish X/m values (amount of solute adsorbed/unit weight of carbon) for various solution equilibrium concentrations. Multisolute isotherm points were utilized to determine the relative order of absorption strength on the activated carbon. It was determined that absorption of three solutes followed the order: 5-ethyl-5-methylhydantoin> 5,5-dimenthyldantoin > hydantoin. Absorption column tests were performed for single solute, bisolute, and trisolute solutions as well as an undiluted coal-gasification wastewater containing predominantly hydantoin compounds. The column absorption studies in concert with the isotherm studies demonstrated that activated carbon has low absorption capacity for hydantoin, 5,5-dimethylhydantoin, and 5-ethyl-5-methylhydantoin. Absorption using activated carbon did not appear to be an effective treatment process for the removal of hydantoins from the coal-gasification wastewater.

• Research Organization: Georgia Inst. of Tech., Atlanta (USA). School of Civil Engineering
• OSTI ID: 6293181
• Report Number(s): AD-A-159047/0/XAB
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION
ACTIVATED CARBON
ADSORBENTS
AZOLES
CARBON
COAL GASIFICATION
CONTROL
ELEMENTS
GASIFICATION
HETEROCYCLIC COMPOUNDS
HYDANTOINS
HYDROGEN COMPOUNDS
IMIDAZOLES
ISOTHERMS
LIQUID WASTES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
SOLUTES
SORPTIVE PROPERTIES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
WASTE WATER
WASTES
WATER
WATER POLLUTION CONTROL
WATER TREATMENT