Applicability and modelling of nanofiltration and reverse osmosis for remediation of groundwater polluted with pesticides and pesticide transformation products

Henrik Tækker Madsen, Erik Gydesen Søgaard

Research output: Contribution to journalJournal articleResearchpeer-review

27 Citations (Scopus)

Abstract

The main body of research on pesticide removal with membranes has looked at pesticides used for pest control, but during transport from surface to groundwater aquifers, pesticides are transformed. Therefore the real polluting compounds are often transformation products, and this vastly increases the total number of pollutants in need of treatment, which also creates a need for a simple way of predicting expected rejections to avoid the daunting task of investigating all these experimentally. In this study, the applicability of NF/LPRO/RO membranes for treatment of groundwater polluted with some of these key transformation products is assessed experimentally and compared to that of regular pesticides. Also, it was investigated whether the rejection could be modelled with a simple steric model. It was found that NF membranes capable of rejecting the regular pesticides did not give satisfactory rejections of the transformation products, mainly because of the reduced size of these. Further, the rejection could be described with a pore flow model, but different definitions of the molecular width were needed to describe rejection for NF and LPRO/RO membranes. With the model it was predicted that rejections over 90 % can be obtained with an LPRO membrane for most pesticides and transformation products found in Danish groundwater.
Translated title of the contributionAnvendelighed og modellering af nanofiltrering og omvendt osmose til behandling af grundvand forurenet med pesticider og pesticidrester
Original languageEnglish
JournalSeparation and Purification Technology
Volume125
Pages (from-to)111-119
ISSN1383-5866
DOIs
Publication statusPublished - 7 Apr 2014

Keywords

  • Pesticide
  • Pesticide transformation products
  • Groundwater
  • Nanofiltration
  • Reverse osmosis
  • Steric modelling

Fingerprint Dive into the research topics of 'Applicability and modelling of nanofiltration and reverse osmosis for remediation of groundwater polluted with pesticides and pesticide transformation products'. Together they form a unique fingerprint.

  • Cite this