Fate of di-2-(ethylhexyl)phthalate in three sludge-amended New Mexico soils

Journal Article · Tue Jan 01 04:00:00 EST 1985 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1985.00472425001400040005x· OSTI ID:6196918

Fairbanks, B C; O'Connor, G A; Smith, S E

Di-3-(ethylhexyl)phthalate (DEHP) is a toxic organic of concern limiting the reuse of sewage sludge on agricultural lands. The degradation, volatilization, and adsorption of DEHP-/sup 14/C were monitored in three calcareous soils from New Mexico amended or unamended with sewage sludge. Evolution of /sup 14/CO/sub 2/ was the only mechanism of loss of DEPH from these soils. No volatilization of parent compound or organic metabolites was detected. The effects of sewage sludge on DEHP degradation varied with soil, DEHP concentration, and sludge incubation time. As a result, 50% disappearance time varied from 8 to 72 d, depending on treatment interactions. After 146 d, 76 to 93% of the DEHP-/sup 14/C was evolved as CO/sub 2/. In general, DEHP persistence was reduced by previous exposure of the soil to sludge, but was increased or unaffected by fresh additions of sludge. Increasing DEHP concentration from 2 to 20 mg kg/sup -1/ soil increased DEHP persistence. Degradation of DEHP was greater in two sandy loams (Typic Haplargids and petrocalcic Paleustolls) than in a clay soil (Typic Torrifluvents). Preliminary data suggest extensive adsorption of DEHP by all soils with no effect of sewage sludge additions.

• Research Organization: New Mexico State Univ., Las Cruces
• OSTI ID: 6196918
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Journal Issue: 4 Vol. 14:4; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AGRICULTURE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON 14
CARBON ISOTOPES
CARBOXYLIC ACID SALTS
CHEMICAL REACTIONS
DECOMPOSITION
EVAPORATION
EVEN-EVEN NUCLEI
FEDERAL REGION VI
GROUND DISPOSAL
INDUSTRY
ISOTOPES
LIGHT NUCLEI
LOAM
MANAGEMENT
NEW MEXICO
NORTH AMERICA
NUCLEI
PHASE TRANSFORMATIONS
PHTHALATES
RADIOISOTOPES
SAND
SEWAGE
SEWAGE SLUDGE
SLUDGES
SOILS
SORPTION
TOXICITY
USA
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
YEARS LIVING RADIOISOTOPES