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

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Authors:
  • Madsen, Henrik Tækker ;
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    Orcid logo0000-0002-2498-8709
    Aalborg University Copenhagen, Department of Communication and Psychology, The Faculty of Humanities, Aalborg University
  • Søgaard, Erik Gydesen
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    Orcid logo0000-0001-9049-0629
    Aalborg University Esbjerg, Department of Civil Engineering, The Faculty of Engineering and Science, Aalborg University
DOI:
10.1016/j.seppur.2014.01.038
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.
Type:
Journal article
Language:
English
Published in:
Separation and Purification Technology, 2014, Vol 125, p. 111-119
Keywords:
Pesticide; Pesticide transformation products; Groundwater; Nanofiltration; Reverse osmosis; Steric modelling
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2014
Scientific Level:
Scientific
ID:
260571580

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