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EFFECTS OF SEWAGE SLUDGE ON DI-(2-ETHYLHEXYL) PHTHALATE UPTAKE BY PLANTS
Citation:
Aranda, J., G. O'Connor, AND G. Eiceman. EFFECTS OF SEWAGE SLUDGE ON DI-(2-ETHYLHEXYL) PHTHALATE UPTAKE BY PLANTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-89/514 (NTIS PB91177121), 1989.
Description:
Di-(2-ethylhexyl) phthalate (DEHP) is a priority organic pollutant frequently found in municipal sludges. reenhouse study was conducted to determine the effects of sludge on plant uptake of 14 C-DEHP (carbonyl labeled). lants grown included three food chain crops, lettuce (Lactuca sativa L.), carrot (Daucus carota L.), and cable pepper (Capsicum annuum L.) and tall fescue (Festuca arundinacea Schreb.). et 14C concentration in plants grown in soil amended with 14C-DEHP-contaminated sludge was independent of sludge rate (at the same DEHP loading) for lettuce, chile fruit, and carrot roots. et 14C concentration, however, was inversely related to sludge rate in carrot tops, fescue, and chile plants. Intact DEHP was not detected in plants by gas chromatography/mass spectrometry analysis. alculated plant DEHP concentrations (based on measured net 14C concentrations and DEHP specific activities) were general correlated better with DEHP soil solution concentrations than with total DEHP soil concentrations. et 14C-DEHP bioconcentration factors were calculated from initial soil DEHP concentration and plant fresh weights. ioconcentration factors ranged from 0.01 to 0.03 for fescue, lettuce, carrots, and chile, suggesting little DEHP uptake. Additionally, because intact DEHP was not detected in any plants, DEHP uptake by plants was of minor importance and would not limit sludge additions to the soils used to grow these crops.
