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Water purification from pesticides by spiral wound nanofiltration membrane

  • Bottino, A. (Dipartimento di Chimica e Chimica Industriale, Universita di Genova) ;
  • Capannelli, G. (Dipartimento di Chimica e Chimica Industriale, Universita di Genova) ;
  • Comite, A. (Dipartimento di Chimica e Chimica Industriale, Universita di Genova) ;
  • Ferrari, F. (Dipartimento di Chimica e Chimica Industriale, Universita di Genova) ;
  • Firpo, R. (Dipartimento di Chimica e Chimica Industriale, Universita di Genova)
  • Received : 2010.01.21
  • Accepted : 2010.09.24
  • Published : 2011.01.25

Abstract

A spiral wound nanofiltration (NF) membrane (GE Osmonics, DK 4040F) was used to remove pesticides from water. Several solutions of single pesticides and their mixtures were prepared. The pesticides initial concentration ranged from ca. 50 ng/L (single pesticide) to ca. 700 ng/L (as sum of 14 pesticides) and progressively increased with time since the NF experiments were carried out in a concentration mode up to a Volume Concentration Ratio, VCR = 10. Permeate flux and pesticides retention were evaluated as a function of the Volume Concentration Ratio. The permeate flux did not practically change by varying VCR. Pesticide retention was found to be around 97-98% both in the cases of single pesticide solutions and different mixtures of pollutants, and was not affected by the VCR. Pesticides concentration in permeate samples was found to be lower than the maximum concentration level fixed in European directive.

Keywords

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