Pilot-scale removal of persistent and mobile organic substances in granular activated carbon filters and experimental predictability at lab-scale

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Pia Schumann - , Federal Environmental Agency, Germany, Technical University of Berlin (Author)
  • Dario Müller - , Dresden University of Technology, Leipzig Municipal Waterworks Ltd. (Author)
  • Paulina Eckardt - , Technical University of Berlin (Author)
  • Matthias Muschket - , Helmholtz Centre for Environmental Research (Author)
  • Daniel Dittmann - , Federal Environmental Agency, Germany (Author)
  • Luisa Rabe - , Federal Environmental Agency, Germany, Technical University of Berlin (Author)
  • Kristin Kerst - , Chair of Process Engineering in Hydro Systems (Author)
  • André Lerch - , Chair of Process Engineering in Hydro Systems (Author)
  • Thorsten Reemtsma - , Helmholtz Centre for Environmental Research (Author)
  • Martin Jekel - , Technical University of Berlin (Author)
  • Aki Sebastian Ruhl - , Federal Environmental Agency, Germany, Technical University of Berlin (Author)

Abstract

Present knowledge about the fate of persistent and mobile (PM) substances in drinking water treatment is limited. Hence, this study assesses the potential of fixed-bed granular activated carbon (GAC) filters to fill the treatment gap for PM substances and the elimination predictability from lab-scale experiments. Two parallel pilot filters (GAC bed height 2 m, diameter 15 cm) with different GAC were operated for 1.5 years (ca. 47,000 BV throughput) alongside rapid small-scale column tests (RSSCT) designed based on the proportional diffusivity (PD) and the constant diffusivity (CD) approaches. Background dissolved organic matter (DOM) and a set of 17 target substances were investigated, among them 2-acrylamido-2-methylpropane sulfonate (AAMPS), adamantan-1-amine (ATA), melamine (MEL) and trifluoromethanesulfonic acid (TFMSA). Nine substances were predominantly present in the drinking water used as pilot filter influent (frequencies of detection above 80 %, median concentrations 0.003–1.868 μg/L) and their breakthrough behaviors could be observed: TFMSA was not retained at all, four substances including AAMPS and ATA reached complete breakthrough below 20,000 BV, three compounds were partially retained until the end of operation and oxypurinol was retained completely. The comparable PM candidate and DOM removal performances of both GAC aligns with their very similar surface characteristics and elemental compositions. The agreement of results between RSSCT with the pilot-scale filters were substance specific and no superior RSSCT design could be identified. However, CD-RSSCT provide a conservative removal prediction for most studied compounds. MEL adsorption was significantly underestimated by both RSSCT designs. Using the criterion of a carbon usage rate (with respect to 50 % breakthrough) below 25 mgGAC/Lwater for an economic retention by fixed-bed GAC filters, five (out of nine) substances met the requirement.

Details

Original languageEnglish
Article number163738
Number of pages12
JournalScience of the total environment
Volume884
Early online date27 Apr 2023
Publication statusPublished - 1 Aug 2023
Peer-reviewedYes

External IDs

PubMed 37116805
WOS 001005383700001
ORCID /0000-0002-6355-9122/work/142237084

Keywords

Research priority areas of TU Dresden

Subject groups, research areas, subject areas according to Destatis

Sustainable Development Goals

Keywords

  • Emerging contaminants, Organic micropollutants (OMP), Polar contaminants, Rapid small-scale column tests (RSSCT), Trace organic chemicals (TOrC)