Skip to main content

Table 1 Scenario-independent and scenario-specific input parameters for the release of Imidacloprid from topically applied VMPs

From: Development of an aquatic exposure assessment model for Imidacloprid in sewage treatment plant discharges arising from use of veterinary medicinal products

Parameter Nomenclature Spot-on Collars Unit References
Dogs Cats Dogs Cats
Parameter not related to specific scenario
 Fraction of houses treating a dog/cat Fhouses,treating 0.14 0.10 7.63 E−03 2.31E−03 (–) Equation 2
 Number of treated animals per STP Ndog/cat,treated/STP 558 400 31 9 (–) Equation 1
 Active substance used for all cats and dogs considering multiple applications per year and weight differentiation Qai,dog/cat_year 389 81 93 12 (g/year/STP) Additional file 1: Eq. S1a
 Frequency of use per day Fuse,spot-on/Fuse,collar 3.5E−03 4.5E−03 4.2E−03 4.2E−03 (day−1) Additional file 1: Eq. S2a (spot-on)
 Amount of a.s. used maximal per day Qai,dog/cat_day_spot-on/Qai,dog/cat_day_collar 1.38 0.36 0.39 0.048 (g/day/STP) Equation 4
Scenario 1: Washing of pet bedding
 Fraction for abrasion Fabr 0.20 0.20 0.01 0.01 (–) a
 Fraction being released due to washing Fwashing 0.50 0.50 0.50 0.50 (–) a
 Fraction released to wastewater Fwater 0.10 0.10 0.005 0.005 (–) Equation 5
 Simultaneity factor Fsim 0.10 0.09 0.10 0.09 (–) a
Scenario 2: Washing/bathing of dogs
 Fraction being released due to washing/bathing Fwashing 0.50 n.r 0.20 n.r (–) a
 Fraction remaining in collar Fcollar n.r n.r a n.r (–) b
 Fraction released to wastewater Fwater_spot-on/Fwater_collar 0.50 n.r 0.08 n.r (–) Equations 11, 12
 Simultaneity factor Fsim 0.13 n.r 0.13 n.r (–) a
Scenario 3: Walking dogs in rain
 Fraction being released due to rain Frain 0.20 n.r 0.02 n.r (–) a
 Fraction entering the same STP FSTP 0.50 n.r 0.50 n.r (–) a
 Fraction released to wastewater Fwater 0.10 n.r 0.01 n.r (–) Equation 15
 Fraction of owners walking dogs in the rain Fwalking 0.31 n.r 0.31 n.r (–) a
  1. n.r. not relevant
  2. aAdditional file 1
  3. bData unpublished, confidential