IMEP-23: The eight EU-WFD priority PAHs in water in the presence of humic acid

Kreeke, J. van de; Calle, Beatriz de la; Held, Andrea; Bercaru, Ofelia; Ricci, Marina; Shegunova, Penka; Taylor, Philip

doi:10.1016/j.trac.2010.04.009

Cited by 18 publications

(3 citation statements)

References 12 publications

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“…However, DEHP exhibited a decrease in qe from 820 to 650 µg/g when SBAC was preloaded with DOM. Contrary to what was suggested by Kreeke et al (2010), 24 h of pre-contact between eluate DOM and HOCs before adding SBAC had no effect on HOC adsorption, including DEHP adsorption (Figure 1a, (Figure 1b, no pre-loading) compared to 820 µg/g in eluate solution (Figure 1a, no pre-loading). In addition, pre-contact between HA and SBAC and HA and HOC reduced qe,DEHP further to 180 and 170 µg/g, respectively (Figure 1b, pre-loading HA+SBAC and HA+HOC).…”

Section: Preloading Effects On Adsorption Capacitycontrasting

confidence: 65%

“…In addition, DOM may directly compete with HOCs for adsorption sites on the SBAC surface (Li et al 2003;Pelekani and Snoeyink 1999), leading to lower HOC adsorption; (ii) preloading activated carbon with large organic molecules, such as NOM, leads to pore blocking and results in reduced adsorption of smaller organic pollutants (Li et al 2003;Quinlivan et al 2005). In addition, HOCs need time to equilibrate with DOM to form HOC-DOM complexes (Kreeke et al 2010), which are not adsorbed to the same degree as truly dissolved HOCs (Kalmykova et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Sorption of DOM and hydrophobic organic compounds onto sewage-based activated carbon

Björklund

2016

Water Science and Technology

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Treatment of stormwater via sorption has the potential to remove both colloidal and dissolved pollutants. Previous research shows that activated carbon produced from sewage sludge is very efficient in sorbing hydrophobic organic compounds (HOCs), frequently detected in stormwater. The aim of this research was to determine whether the presence of dissolved organic matter (DOM) has a negative effect on the adsorption of HOCs onto sludge-based activated carbon (SBAC) in batch adsorption tests. Batch adsorption tests were used to investigate the influence of two types of DOM - soil organic matter and humic acid (HA) technical standard - on the sorption of HOCs onto SBAC, and whether preloading adsorbent and adsorbates with DOM affects HOC sorption. The results indicate that soil DOM and HAs do not have a significant negative effect on the adsorption of HOCs under tested experimental conditions, except for a highly hydrophobic compound. In addition, preloading SBAC or HOCs with DOM did not lead to lower adsorption of HOCs. Batch adsorption tests appear to be inefficient for investigating DOM effects on HOC adsorption, as saturating the carbon is difficult because of high SBAC adsorption capacity and low HOC solubility, so that limited competition occurs on the sorbent.

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Section: Preloading Effects On Adsorption Capacitycontrasting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Sorption of DOM and hydrophobic organic compounds onto sewage-based activated carbon

Björklund

2016

Water Science and Technology

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“…Other attempts have been made to prepare proficiency testing (PT) samples for organics in water employing the widely used “reconstitution” approach. In this approach, a solution of analytes of interest in an organic solvent (miscible with water) is spiked into a water sample in the laboratory immediately prior to analysis [ 8 , 10 , 11 ] or at the producer’s premises just before shipping [ 12 , 13 ]. The rest of the approach is the ‘‘immobilization’’ of analytes (in this case, pesticides) on a solid-phase extraction (SPE) cartridge [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Development of a Water Matrix Certified Reference Material for Volatile Organic Compounds Analysis in Water

et al. 2021

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Water matrix certified reference material (MCRM) of volatile organic compounds (VOCs) is used to provide quality assurance and quality control (QA/QC) during the analysis of VOCs in water. In this research, a water MCRM of 28 VOCs was developed using a “reconstitution” approach by adding VOCs spiking, methanol solution into pure water immediately prior to analysis. The VOCs spiking solution was prepared gravimetrically by dividing 28 VOCs into seven groups, then based on ISO Guide 35, using gas chromatography-mass spectrometry (GC-MS) to investigate the homogeneity and long-term stability. The studies of homogeneity and long-term stability indicated that the batch of VOCs spiking solution was homogeneous and stable at room temperature for at least 15 months. Moreover, the water MCRM of 28 VOCs was certified by a network of nine competent laboratories, and the certified values and expanded uncertainties of 28 VOCs ranged from 6.2 to 17 μg/L and 0.5 to 5.3 μg/L, respectively.

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Novel concepts for preparation of reference materials as whole water samples for priority substances at nanogram-per-liter level using model suspended particulate matter and humic acids

et al. 2014

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One of the unresolved issues of the European Water Framework Directive is the unavailability of realistic water reference materials for the organic priority pollutants at low nanogram-per-liter concentrations. In the present study, three different types of ready-to-use water test materials were developed for polycyclic aromatic hydrocarbons (PAHs), polybrominated diphenyl ethers (PBDEs) and tributyltin (TBT) at nanogram-per-liter levels. The first type simulated the dissolved phase in the water and comprised of a solution of humic acids (HA) at 5 mg L−1 dissolved organic carbon (DOC) and a spike of the target compounds. The second type of water sample incorporated the particulate phase in water. To this end, model suspended particulate matter (SPM) with a realistic particle size was produced by jet milling soil and sediments containing known amounts of PAHs, PBDEs and TBT and added as slurry to mineral water. The most complex test materials mimicked “whole water” consequently containing both phases, the model SPM and the HA solution with the target analytes strongly bound to the SPM. In this paper, the development of concepts, processing of the starting materials, characterisation of the HA and model SPMs as well as results for homogeneity and stability testing of the ready-to-use test materials are described in detail.Graphical AbstractVials containing 0.5 g of model SPM, black caps for TBT, silver caps for PAH and red caps for PBDEs, respectively.Graphical AbstractPetri dishes with dried model SPMs; to the left 95.7 ± 0.9 mg of SPM containing PBDEs; in the middle 95.8 ± 0.7 mg of SPM containing TBT and to the right 93.7 mg ± 0.7 mg of SPM containing PAHs

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IMEP-23: The eight EU-WFD priority PAHs in water in the presence of humic acid

Cited by 18 publications

References 12 publications

Sorption of DOM and hydrophobic organic compounds onto sewage-based activated carbon

Sorption of DOM and hydrophobic organic compounds onto sewage-based activated carbon

Development of a Water Matrix Certified Reference Material for Volatile Organic Compounds Analysis in Water

Novel concepts for preparation of reference materials as whole water samples for priority substances at nanogram-per-liter level using model suspended particulate matter and humic acids

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