The Science of The Total Environment, Год журнала: 2020, Номер 741, С. 139514 - 139514
Опубликована: Май 25, 2020
Язык: Английский
Water, Год журнала: 2019, Номер 11(11), С. 2230 - 2230
Опубликована: Окт. 25, 2019
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 river network. We elaborate on physical, biological, biogeochemical drivers processes within that have been studied by multiple scientific disciplines for almost half century. These previous efforts shown modulator most metabolic stream serves as refuge habitat diverse range of aquatic organisms. It also exerts major control water quality increasing contact time with environments, which in turn results retention transformation nutrients, trace organic compounds, fine suspended particles, microplastics, among others. paper showcases critical importance zones, both from an applied perspective, their role ecosystem services to answer question manuscript title. identifies research gaps our understanding processes. In conclusion, we highlight potential restoration efficiently manage reactivate functions corridors.
Язык: Английский
Процитировано
156
Environmental Science & Technology, Год журнала: 2019, Номер 53(8), С. 4224 - 4234
Опубликована: Март 24, 2019
The fate of 28 trace organic compounds (TrOCs) was investigated in the hyporheic zone (HZ) an urban lowland river Berlin, Germany. Water samples were collected hourly over 17 h and three depths HZ using minipoint samplers. four relatively variable time series subsequently used to calculate first-order removal rates retardation coefficients via a one-dimensional reactive transport model. Reversible sorption processes led substantial many TrOCs along flow path. Some TrOCs, such as dihydroxy-carbamazepine, O-desmethylvenlafaxine, venlafaxine, found be stable HZ. Others readily removed with half-lives first 10 cm ranging from 0.1 ± 0.01 for iopromide 3.3 0.3 tramadol. Removal rate constants majority highest HZ, where biodegradable dissolved matter also highest. Because conditions oxic top 30 path, we attribute this finding high microbial activity typically associated shallow Frequent short vertical exchange flows could therefore more important reach-scale TrOC than long, lateral paths.
Язык: Английский
Процитировано
83
Water Research, Год журнала: 2021, Номер 193, С. 116846 - 116846
Опубликована: Янв. 18, 2021
Micropollutants are ubiquitously found in natural surface waters and pose a potential risk to aquatic organisms. Stream biofilms, consisting of bacteria, algae other microorganisms potentially contribute bioremediating environments by biotransforming xenobiotic substances. When investigating the stream biofilms remove micropollutants from water column, it is important distinguish between different fate processes, such as biotransformation, passive sorption active bioaccumulation. However, due complex nature biofilm community its extracellular matrix, this task often difficult. In study, we combined biotransformation experiments involving collected up- downstream wastewater treatment plant outfalls with QuEChERS extraction method processes. The proved be suitable for broad range (> 80% investigated compounds). We that 31 out 63 compounds were biotransformed majority being substitution-type biotransformations, have an increased towards specific wastewater-relevant micropollutants. Overall, using experimental analytical strategy developed, demonstrated inherent micropollutant potential, thus bioremediation improving ecosystem health.
Язык: Английский
Процитировано
71
Environmental Science & Technology, Год журнала: 2022, Номер 56(19), С. 13528 - 13545
Опубликована: Сен. 15, 2022
Metformin is the first-line antidiabetic drug and one of most prescribed medications worldwide. Because its ubiquitous occurrence in global waters demonstrated ecotoxicity, metformin, as with other pharmaceuticals, has become a concerning emerging contaminant. subject to transformation, producing numerous problematic transformation byproducts (TPs). The occurrence, removal, toxicity metformin have been continually reviewed; yet, comprehensive analysis pathways, byproduct generation, associated change adverse effects lacking. In this review, we provide critical overview fate during water treatments natural processes compile 32 organic TPs generated from biotic abiotic pathways. These occur aquatic systems worldwide along metformin. Enhanced several compared through organism tests necessitates development complete mineralization techniques for more attention on TP monitoring. We also assess potential indicate overall contamination pharmaceuticals environments, previously acknowledged ones, found be robust or comparable indicator such pharmaceutical contamination. addition, insightful avenues future research
Язык: Английский
Процитировано
44
Environmental Science & Technology, Год журнала: 2020, Номер 54(20), С. 12967 - 12978
Опубликована: Сен. 22, 2020
Effluent-dominated streams are becoming increasingly common in temperate regions and generate complex pharmaceutical mixture exposure conditions that may impact aquatic organisms via drug-drug interactions. Here, we quantified spatiotemporal concentrations composition dynamics during baseflow at four sites a temperate-region effluent-dominated stream (upstream, at, progressively downstream from effluent discharge). Samples were analyzed monthly for 1 year 109 pharmaceuticals/degradates using comprehensive U.S. Geological Survey analytical method biweekly 2 years focused on 14 most pharmaceuticals/degradates. We observed strong chemical gradient with pharmaceuticals only sporadically detected upstream the effluent. Seventy-four individual detected, spanning 5 orders of magnitude 0.28 to 13 500 ng/L, 38 compounds >50% samples. "Biweekly" represented 77 ± 8% overall concentration. The antidiabetic drug metformin consistently had highest concentration limited in-stream attenuation. antihistamine fexofenadine inputs greater warm- than cool-season but also attenuated faster. Differential attenuation (i.e., high = citalopram; low metformin) contributed evolution along reach. This research demonstrates variable over multiple differential evolving biota, implications interactive effects.
Язык: Английский
Процитировано
51
Environmental Science & Technology, Год журнала: 2020, Номер 54(9), С. 5467 - 5479
Опубликована: Апрель 6, 2020
Hyporheic zones are the water-saturated flow-through subsurfaces of rivers which characterized by simultaneous occurrence multiple physical, biological, and chemical processes. Two factors playing a role in hyporheic attenuation organic contaminants sediment bedforms (a major driver exchange) composition microbial community. How these act on diverse range encountered downstream from wastewater treatment plants is not well understood. To address this knowledge gap, we investigated dissipation half-lives (DT50s) 31 substances (mainly pharmaceuticals) under different combinations bacterial diversity bedform-induced flow using 20 recirculating flumes central composite face factorial design. By combining small-volume pore water sampling, targeted analysis, suspect screening, along with quantitative real-time PCR time-resolved amplicon Illumina MiSeq sequencing, determined comprehensive set DT50s, associated communities, transformation products. The resulting DT50s parent compounds ranged 0.5 (fluoxetine) to 306 days (carbamazepine), responding significantly four both flow. Bacterial taxa that were biodegradation included Acidobacteria (groups 6, 17, 22), Actinobacteria (Nocardioides Illumatobacter), Bacteroidetes (Terrimonas Flavobacterium) Proteobacteria (Pseudomonadaceae, Sphingomonadaceae, Xanthomonadaceae). Notable formation valsartan acid irbesartan valsartan, persistence N-desmethylvenlafaxine across all treatments, identification biuret as novel product metformin. Twelve additional target products identified, persistent either or surface at least one treatment, indicating their environmental relevance.
Язык: Английский
Процитировано
48
Chemosphere, Год журнала: 2021, Номер 284, С. 131546 - 131546
Опубликована: Июль 15, 2021
Язык: Английский
Процитировано
38
Physical review. E, Год журнала: 2022, Номер 105(1)
Опубликована: Янв. 4, 2022
We present a framework for systems in which diffusion-advection transport of tracer substance mobile zone is interrupted by trapping an immobile zone. Our model unifies different approaches based on distributed-order diffusion equations, exciton rate models, and random-walk models multirate mobile-immobile mass transport. study various forms the time dynamics their effects Moreover, we find associated breakthrough curves, density at fixed point space as function time, concentration profiles respective moments Specifically, derive explicit anomalous asymptotic power-law decay Mittag-Leffler distribution. In our analysis out that even exponential densities, transient observed. results have direct applications geophysical contexts, but also biological, soft matter, solid state systems.
Язык: Английский
Процитировано
25
Water Research, Год журнала: 2023, Номер 242, С. 120203 - 120203
Опубликована: Июнь 9, 2023
Язык: Английский
Процитировано
14
The Science of The Total Environment, Год журнала: 2018, Номер 656, С. 1250 - 1260
Опубликована: Ноя. 27, 2018
Interpreting the fate of wastewater contaminants in streams is difficult because their inputs vary time and several processes synchronously affect reactive transport. We present a method to disentangle various influences by performing conservative-tracer test while sampling stream section at locations for chemical analysis micropollutants. By comparing outflow concentrations with tracer signal convoluted inflow series, we estimated reaction rate coefficients calculated contaminant removal along river section. The was tested River Steinlach, Germany, where 38 were monitored. Comparing day-time night-time experiments allowed distinguishing photo-dependent degradation from other elimination processes. While showed be highly efficient metroprolol, bisoprolol, venlafaxine, its impact on similar scale photo-independent when averaged over 24 h. For selection compounds analyzed study, bio- photodegradation higher than previous field studies. In Steinlach observed extraordinarily effective that may due proportion treated wastewater, temperature, DOC nitrate concentrations, but also surface volume ratio low flow conditions favorizes through shallow water column larger transient storage comparable
Язык: Английский
Процитировано
45