Adsorption of the nitrification inhibitors nitrapyrin and dicyandiamide by soil humic substances

Cardinal Scholar

Show simple item record

dc.contributor.advisor Pichtel, John, 1957- en_US
dc.contributor.author Jacinthe, Pierre-Andre en_US
dc.date.accessioned 2011-06-03T19:35:31Z
dc.date.available 2011-06-03T19:35:31Z
dc.date.created 1990 en_US
dc.date.issued 1990
dc.identifier LD2489.Z78 1990 .J3 en_US
dc.identifier.uri http://cardinalscholar.bsu.edu/handle/handle/184058
dc.description.abstract Adsorption of the nitrification inhibitors dicyandiamide (DCD) and nitrapyrin (2-chloro-6(trichloromethyl)-pyridine) on humic acid (HA) and fulvic acid (FA) extracted from five Indiana soils was studied. Ten mg of HA or FA were suspended in aqueous solutions (10 ml) of either DCD (5,10, 20, 40 and 80 ug ml-1) or nitrapyrin (2,4,6,8,12 ug ml-1). The amount of nitrification inhibitor absorbed was evaluated after shaking the suspension of DCD for 48 h or nitrapyrin for 24 h. Infrared spectra of the nitrification inhibitor-humic material complexes were recorded. The results indicated that FA adsorbed more DCD than HA, and HA was a better adsorbent for nitrapyrin. Correlation between Freundlich K values and organic carbon content of HA and FA was not statistically significant, indicating a slight contribution of hydrophobic forces in the adsorption of DCD and nitrapyrin. The infrared spectra provided evidence that adsorption occurred predominantly through an ionic bonding mechanism involving the protonated amino group of DCD or the nitrogen of the pyridine ring of nitrapyrin and the negative functional groups of the humic materials.
dc.description.sponsorship Department of Natural Resources
dc.format.extent 83 leaves : ill. ; 28 cm. en_US
dc.source Virtual Press en_US
dc.subject.lcsh Soil absorption and adsorption. en_US
dc.subject.lcsh Nitrification inhibitors. en_US
dc.title Adsorption of the nitrification inhibitors nitrapyrin and dicyandiamide by soil humic substances en_US
dc.description.degree Thesis (M.S.)
dc.identifier.cardcat-url http://liblink.bsu.edu/catkey/722445 en_US


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

  • Master's Theses [5318]
    Master's theses submitted to the Graduate School by Ball State University master's degree candidates in partial fulfillment of degree requirements.

Show simple item record

Search Cardinal Scholar


Browse

My Account