6Kools S A E, Mohmann J F, Knacker T. Estimating the use of veterinary medicines in the European union [ J ]. Regulatory Toxicology and Pharmacology,2008 ,50( 1 ) :59-65.
7Halling-Scrensen B, Nielsen S N, Lanzky P F, et al. Occurrence, fate and effects of pharmaceutical substances in the environment-a review[J]. Chemosphere,1998,36(2) :357-393.
8Lishman L, Smyth S A, Sarafin K, et al. Occurrence and reductions of pharmaceuticals and personal care products and estrogens by municipal wastewater treatment plants in Ontario, Canada [ J ]. Science of the Total Environment, 2006,367 ( 2- 3 ) :544-558.
9Vieno N,Tuhkanen T, Kronberg L. Elimination of pharmaceuticals in sewage treatment plants in Finland[ J]. Water Research,2007, 41(5) :1001-1012.
10Zorita S,Martensson L,Mathiasson L. Occurrence and removal of pharmaceuticals in a municipal sewage treatment system in the south of Sweden [ J ]. Science of the Total Environment,2009,407 (8) :2760-2770.
