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Journal of Environmental Quality Abstract -

Adsorption, Degradation, and Plant Availability of 2,4-Dinitrophenol in Sludge-Amended Calcareous Soils


This article in JEQ

  1. Vol. 19 No. 3, p. 587-593
    Received: Aug 1, 1989

    * Corresponding author(s):
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  1. G. A. O'Connor *,
  2. J. R. Lujan and
  3. Yan Jin
  1. Dep. of Agronomy and Horticulture, New Mexico State Univ., Las Cruces, NM 88003.



2,4-Dinitrophenol (DNP) is a moderately weak acid that is expected to be highly labile (leachable and plant available) in high-pH soils. The adsorption and degradation behavior of DNP in two sludge-amended, calcareous soils was determined and used to explain DNP uptake by plants grown in the soils in the greenhouse. The DNP adsorption was minor in both soils and was only slightly affected by sludge. The DNP degradation was rapid in both soils and was unaffected by sludge. Thus, despite limited soil adsorption, plant uptake of DNP was minor in all crops and plant parts owing to rapid soil DNP degradation. Even if a municipal sludge highly contaminated with DNP was identified (an unlikely occurrence), concerns over possible plant contamination should not limit sludge applications to calcareous soils at agronomic rates. Rapid degradation will minimize opportunities for plant uptake of DNP from contaminated soils or leaching of DNP to groundwater, given careful water management.

Journal Article no. 1491, Agric. Exp. Stn., New Mexico State Univ. Although financial support for this study was provided in part by Cooperative Agreement CR-812687-02 with the USEPA, this report has not had USEPA's required peer and policy review and does not necessarily reflect the views of the agency.

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