@article{fdi:010055750,
  title = {{I}mpact of long-term wastewater irrigation on sorption and transport of atrazine in {M}exican agricultural soils},
  author = {{M}uller, {K}. and {D}uwig, {C}{\'e}line and {P}rado, {B}. and {S}iebe, {C}. and {H}idalgo, {C}. and {E}tchevers, {J}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the {M}ezquital {V}alley, {M}exico, crops have been irrigated with untreated municipal wastewater for more than a century. {A}trazine has been applied to maize and alfalfa grown in the area for weed control for 15 years. {O}ur objectives were to analyse (i) how wastewater irrigation affects the filtering of atrazine, and (ii) if the length of irrigation has a significant impact. {W}e compared atrazine sorption to {P}haeozems that have been irrigated with raw wastewater for 35 ({P}35) and 85 ({P}85) years with sorption to a non-irrigated ({P}0) {P}haeozem soil under rainfed agriculture. {T}he use of bromide as an inert water tracer in column experiments and the subsequent analysis of the tracers' breakthrough curves allowed the calibration of the hydrodynamic parameters of a two-site non equilibrium convection-dispersion model. {T}he quality of the irrigation water significantly altered the soils' hydrodynamic properties (hydraulic conductivity, dispersivity and the size of pores that are hydraulically active). {T}he impacts on soil chemical properties (total organic carbon content and p{H}) were not significant, while the sodium adsorption ratio was significantly increased. {S}orption and desorption isotherms, determined in batch and column experiments, showed enhanced atrazine sorption and reduced and slower desorption in wastewater-irrigated soils. {T}hese effects increased with the length of irrigation. {T}he intensified sorption-desorption hysteresis in wastewater-irrigated soils indicated that the soil organic matter developed in these soils had fewer high-energy, easily accessible sorption sites available, leading to lower and slower atrazine desorption rates. {T}his study leads to the conclusion that wastewater irrigation decreases atrazine mobility in the {M}ezquital valley {P}haeozems by decreasing the hydraulic conductivity and increasing the soil's sorption capacity.},
  keywords = {{P}esticide ; pesticide mobility ; filtering ; soil organic matter ; normalized sorption coefficient ; non-equilibrium sorption ; dissolved ; organic matter},
  booktitle = {},
  journal = {{J}ournal of {E}nvironmental {S}cience and {H}ealth, {P}art {B} : {P}esticides {F}ood {C}ontaminants and {A}gricultural {W}astes},
  volume = {47},
  numero = {1},
  pages = {30--41},
  ISSN = {0360-1234},
  year = {2012},
  DOI = {10.1080/03601234.2012.606416},
  URL = {https://www.documentation.ird.fr/hor/fdi:010055750},
}