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@ARTICLE{Dutta:255949,
      author       = {Dutta, Anirban and Mandal, Abhishek and Manna, Suman and
                      Singh, S. B. and Berns, Anne E. and Singh, Neera},
      title        = {{E}ffect of organic carbon chemistry on sorption of
                      atrazine and metsulfuron-methyl as determined by
                      $^{13}${C}-{NMR} and {IR} spectroscopy},
      journal      = {Environmental monitoring and assessment},
      volume       = {187},
      number       = {10},
      issn         = {1573-2959},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2015-06028},
      pages        = {620},
      year         = {2015},
      abstract     = {Soil organic matter (SOM) content is themajor soil
                      component affecting pesticide sorption. However,recent
                      studies have highlighted the fact that it is notthe total
                      carbon content of the organic matter, but itschemical
                      structure which have a profound effect on thepesticide’s
                      sorption. In the present study, sorption ofatrazine and
                      metsulfuron-methyl herbicides was studiedin four SOM
                      fractions viz. commercial humic acid,commercial lignin, as
                      well as humic acid and huminextracted from a compost.
                      Sorption data was fitted to theFreundlich adsorption
                      equation. In general, theFreundlich slope (1/n) values for
                      both the herbicideswere <1. Except for atrazine sorption on
                      commercialhumic acid, metsulfuron-methyl was more sorbed.
                      Desorptionresults suggested that atrazine was moredesorbed
                      than metsulfuron-methyl. Lignin, whichshowed least sorption
                      of both the herbicides, showedminimum desorption. Sorption
                      of atrazine was bestpositively correlated with the alkyl
                      carbon (adjustedR2 = 0.748) and carbonyl carbon (adjusted R2
                      = 0.498)but, their effect was statistically nonsignificant(P
                      = 0.05). Metsulfuron-methyl sorption showed bestpositive
                      correlation with carbonyl carbon (adjustedR2 = 0.960; P =
                      0.05) content. Sorption of both theherbicides showed
                      negative correlation with O/N-alkylcarbon. Correlation of
                      herbicide’s sorption with alkyland carbonyl carbon content
                      of SOM fractions suggestedtheir contribution towards
                      herbicide sorption.But, sorption of metsulfuron-methyl,
                      relatively morepolar than atrazine, was mainly governed by
                      the polargroups in SOM. IR spectra showed that H-bonds
                      andcharge-transfer bonds between SOM fraction and
                      herbicidesprobably operated as mechanisms of adsorption.},
      cin          = {IBG-3},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000362284700015},
      doi          = {10.1007/s10661-015-4837-3},
      url          = {https://juser.fz-juelich.de/record/255949},
}