Passive sampling of organic contaminants across the water-sediment interface of an urban stream

Mechelke, Jonas; Vermeirssen, Etiënne L.M.; Hollender, Juliane

doi:10.1016/j.watres.2019.114966

Cited by 28 publications

(14 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, from the total set of targeted compounds selected as model EOCs, the artificial low-calorie sweetener acesulfame was the most widespread chemical and was detected almost constantly in all polluted streams in our study. This pattern is consistent with previous studies in which acesulfame has been reported as the most ubiquitous EOC in streambed sediments and groundwater across Europe [12,[30][31][32][49][50][51]. Thus, our findings strongly support the use of acesulfame as a marker of EOC pollution for application in management and regulation of surface and subsurface waters [49].…”

Section: Discussionsupporting

confidence: 93%

“…EOCs were analyzed using a previously developed direct-injection ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method (Posselt et al 2018). A total of 37 polar organic substances (mostly pharmaceuticals and their transformation products) were selected based on their concentration ranges, detection frequency, degradation behavior, and potential persistence, as well as their occurrence on priority lists [12,[30][31][32]. Water samples were defrosted and vortexed and a sample volume of 800 µL was combined with 195 µL methanol and 5 µL of an internal standard mix.…”

Section: Sampling and Processing Of Eocsmentioning

confidence: 99%

See 1 more Smart Citation

Mapping Micro-Pollutants and Their Impacts on the Size Structure of Streambed Communities

Peralta‐Maraver

Posselt

Perkins

et al. 2019

Water

View full text Add to dashboard Cite

Recently there has been increasing concern over the vast array of emerging organic contaminants (EOCs) detected in streams and rivers worldwide. Understanding of the ecological implications of these compounds is limited to local scale case studies, partly as a result of technical limitations and a lack of integrative analyses. Here, we apply state-of-the-art instrumentation to analyze a complex suite of EOCs in the streambed of 30 UK streams and their effect on streambed communities. We apply the abundance-body mass (N-M) relationship approach as an integrative metric of the deviation of natural communities from reference status as a result of EOC pollution. Our analysis includes information regarding the N and M for individual prokaryotes, unicellular flagellates and ciliates, meiofauna, and macroinvertebrates. We detect a strong significant dependence of the N-M relationship coefficients with the presence of EOCs in the system, to the point of shielding the effect of other important environmental factors such as temperature, pH, and productivity. However, contrary to other stressors, EOC pollution showed a positive effect on the N-M coefficient in our work. This phenomenon can be largely explained by the increase in large-size tolerant taxa under polluted conditions. We discuss the potential implications of these results in relation to bioaccumulation and biomagnification processes. Our findings shed light on the impact of EOCs on the organization and ecology of the whole streambed community for the first time.2 of 12 affect all levels of biological organization [9]. However, characterization and quantification of EOCs in riverine systems is still limited, as is our understanding of their relationship with environmental gradients, especially at large spatial scales [4]. This is largely because determining low concentrations of these substances can be a challenge using existing analytical methodologies [12]. Consequently, most EOCs have been determined to be low risk due to low environmental concentrations [13], and their effect on natural systems is largely unknown.Most anthropogenic effluents are discharged to surface streams and rivers where water is exchanged between the open channel and the saturated permeable streambed sediments [14]. Consequently, dissolved EOCs penetrate the sediments, and organisms located here may be exposed to the effects of EOCs for longer periods of time because of the extended residence times of water in the pore-spaces [15,16]. Streambed sediments harbor diverse and productive biological consortia, whose components range from prokaryotes and microscopic single cell eukaryotes (e.g., flagellates and ciliates) through to meio-and macrofauna (rotifers, copepods, and insect larvae). This translates into a great diversity of life strategies and adaptation capabilities, and, consequently, understanding the effect of EOCs on the whole streambed assemblage is challenging. For example, it might be expected that the rapid population growth and adaptation capacity of prokaryotes might result...

show abstract

Section: Discussionsupporting

confidence: 93%

Section: Sampling and Processing Of Eocsmentioning

confidence: 99%

Mapping Micro-Pollutants and Their Impacts on the Size Structure of Streambed Communities

Peralta‐Maraver

Posselt

Perkins

et al. 2019

Water

View full text Add to dashboard Cite

show abstract

“…Novel methods such as highly dynamic sampling of pore water [223], time-integrated passive sampling techniques [177], and isotopic techniques are under development and will allow better insights into hyporheic processes. Peter et al [33] injected visible dye into shallow HZ sediments in a known downwelling location and pinpointed the area where the labeled flowpath re-emerged to the stream.…”

Section: Methods Development and Methods Standardizationmentioning

confidence: 99%

“…For example, in a bench-scaled flume experiment designed to study hyporheic processes [175], TPs were detected, which were only formed in the sediment but released to the water, hinting at secondary contamination with TPs [176]. In particular, valsartan acid, a rather stable TP of the common blood pressure medication valsartan, forms in situ in the HZ [160,177] and significantly increases its concentrations in the surface water of wastewater receiving streams [178].…”

Section: Retention and (Bio)transformation Of Trace Organic Compoundsmentioning

confidence: 99%

Is the Hyporheic Zone Relevant beyond the Scientific Community?

Lewandowski

Arnon

Banks

et al. 2019

Water

Self Cite

137

102

View full text Add to dashboard Cite

Rivers are important ecosystems under continuous anthropogenic stresses. The hyporheic zone is a ubiquitous, reactive interface between the main channel and its surrounding sediments along the river network. We elaborate on the main physical, biological, and biogeochemical drivers and processes within the hyporheic zone that have been studied by multiple scientific disciplines for almost half a century. These previous efforts have shown that the hyporheic zone is a modulator for most metabolic stream processes and serves as a refuge and habitat for a diverse range of aquatic organisms. It also exerts a major control on river water quality by increasing the contact time with reactive environments, which in turn results in retention and transformation of nutrients, trace organic compounds, fine suspended particles, and microplastics, among others. The paper showcases the critical importance of hyporheic zones, both from a scientific and an applied perspective, and their role in ecosystem services to answer the question of the manuscript title. It identifies major research gaps in our understanding of hyporheic processes. In conclusion, we highlight the potential of hyporheic restoration to efficiently manage and reactivate ecosystem functions and services in river corridors.

show abstract

“…In particular, the significance of a conductive streambed for water quality and aquatic habitats in urban stream management plans is more and more acknowledged 10 , 11 . Micropollutant removal in sediment–water interfaces has been investigated in a number of recent studies, in particular with regards to bank-filtration scenarios 12 – 14 and along vertical flowpaths in losing streams 15 , 16 . Transformation processes of many micropollutants in sediments have been found to be promoted in such transition regions due to their specific redox-sensitivity and their dependency on the diversity of the microbial activities and communities involved 15 , 17 .…”

Section: Introductionmentioning

confidence: 99%

Transformation of organic micropollutants along hyporheic flow in bedforms of river-simulating flumes

Jaeger

Posselt

Schaper

et al. 2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

Urban streams receive increasing loads of organic micropollutants from treated wastewaters. A comprehensive understanding of the in-stream fate of micropollutants is thus of high interest for water quality management. Bedforms induce pumping effects considerably contributing to whole stream hyporheic exchange and are hotspots of biogeochemical turnover processes. However, little is known about the transformation of micropollutants in such structures. In the present study, we set up recirculating flumes to examine the transformation of a set of micropollutants along single flowpaths in two triangular bedforms. We sampled porewater from four locations in the bedforms over 78 days and analysed the resulting concentration curves using the results of a hydrodynamic model in combination with a reactive transport model accounting for advection, dispersion, first-order removal and retardation. The four porewater sampling locations were positioned on individual flowpaths with median solute travel times ranging from 11.5 to 43.3 h as shown in a hydrodynamic model previously. Highest stability was estimated for hydrochlorothiazide on all flowpaths. Lowest detectable half-lives were estimated for sotalol (0.7 h) and sitagliptin (0.2 h) along the shortest flowpath. Also, venlafaxine, acesulfame, bezafibrate, irbesartan, valsartan, ibuprofen and naproxen displayed lower half-lives at shorter flowpaths in the first bedform. However, the behavior of many compounds in the second bedform deviated from expectations, where particularly transformation products, e.g. valsartan acid, showed high concentrations. Flowpath-specific behavior as observed for metformin or flume-specific behavior as observed for metoprolol acid, for instance, was attributed to potential small-scale or flume-scale heterogeneity of microbial community compositions, respectively. The results of the study indicate that the shallow hyporheic flow field and the small-scale heterogeneity of the microbial community are major controlling factors for the transformation of relevant micropollutants in river sediments.

show abstract

Passive sampling of organic contaminants across the water-sediment interface of an urban stream

Abstract: Passive sampling of organic contaminants across the water-sediment interface of an urban stream. Water Research.

Cited by 28 publications

References 54 publications

Mapping Micro-Pollutants and Their Impacts on the Size Structure of Streambed Communities

Mapping Micro-Pollutants and Their Impacts on the Size Structure of Streambed Communities

Is the Hyporheic Zone Relevant beyond the Scientific Community?

Transformation of organic micropollutants along hyporheic flow in bedforms of river-simulating flumes

Contact Info

Product

Resources

About