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Dorn A, Hammel K, Dalkmann P, Faber D, Hellpointner E, Lamshoeft M, Telscher M, Bruns E, Seidel E, Hollert H. What is the actual exposure of organic compounds on Chironomus riparius? - A novel methodology enabling the depth-related analysis in sediment microcosms. CHEMOSPHERE 2021; 279:130424. [PMID: 33887594 DOI: 10.1016/j.chemosphere.2021.130424] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/22/2021] [Accepted: 03/26/2021] [Indexed: 06/12/2023]
Abstract
A novel active sampling method enabled determination of sediment depth profiles revealing the spatial distribution of model compounds N,N-dimethylsulfamide, fluopyram and bixafen (low, medium, high adsorption affinity) in sediment microcosms according to OECD Test 218/219 (Sediment-Water Chironomid Toxicity Test Using Spiked Sediment/Spiked Water). After the overlying water was removed, plastic tubes were inserted into the sediment and the microcosms were frozen. For depth-related analysis, each "sediment core" was mounted in a cutting device and sawed into three 5-mm-slices, respectively (top, middle, bottom). Each slice was centrifuged for sediment and pore water separation. By various sampling dates within 28 days, we could follow the behavior of model compounds depending on sorption affinities and display specific distribution patterns within the sediment. N,N-dimethylsulfamide showing no sediment adsorption, migrated unhindered in (OECD 219) and out (OECD 218) of the sediment via pore water, resulting in homogenous distributions in both test designs. Fluopyram with moderate adsorption affinity revealed a concentration gradient with declining amounts from top to bottom layer (OECD 219) and higher amounts in the middle and bottom layer as compared to the top layer (OECD 218). Bixafen providing a strong adsorption affinity accumulated in the top layer in OECD 219, while no concentration gradients became visible in OECD 218. For establishing a Toxic Substances in Surface Waters (TOXSWA) model, we compared our measurements with simulated results revealing good agreements. The presented methodology is a useful tool to determine more realistic sediment and pore water concentrations, which the Chironomid larvae are exposed to.
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Affiliation(s)
- Alexander Dorn
- Institute of Environmental Research, RWTH Aachen University, 52074, Aachen, Germany; Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany.
| | - Klaus Hammel
- Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany
| | - Philipp Dalkmann
- Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany
| | - Daniel Faber
- Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany
| | - Eduard Hellpointner
- Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany
| | - Marc Lamshoeft
- Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany
| | - Markus Telscher
- Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany
| | - Eric Bruns
- Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany
| | - Erika Seidel
- Environmental Safety, Crop Science Division, Bayer, AG, 40789, Monheim, Germany
| | - Henner Hollert
- Institute of Environmental Research, RWTH Aachen University, 52074, Aachen, Germany; Institute of Ecology, Evolution & Diversity, Goethe Universität, 60438, Frankfurt Am Main, Germany
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Schroeder H, Fabricius AL, Ecker D, Ternes TA, Duester L. Impact of mechanical disturbance and acidification on the metal(loid) and C, P, S mobility at the sediment water interface examined using a fractionation meso profiling ICP-QQQ-MS approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 651:2130-2138. [PMID: 30326445 DOI: 10.1016/j.scitotenv.2018.09.390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/25/2018] [Accepted: 09/28/2018] [Indexed: 06/08/2023]
Abstract
The impact of mechanical disturbance and oxygen induced acidification on the concentration and size fractionation of the 12 metal(loid)s As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Sb, Tl, V and the polyatomic nonmetals C, P and S in the pore water was studied. Using the meso profiling and sampling system (messy) 12 pore water depth profiles were sampled from two incubation experiments undertaken in parallel, which were both mechanically disturbed in the lab and subsequently exposed to a different air supply. In parallel to the low invasive, automated sampling process the redox potential, the pH value and the O2 concentration were detected. Simultaneous quantification of all analytes by inductively coupled plasma-triple quad-mass spectrometry in the two different size classes dissolved (<0.45 μm) and colloidal (0.45-16 μm) showed: i) the predominant influence of the pH on the mobility of metals; ii) the mobility of metalloids was strongly impacted by the mechanical disturbance; and iii) the colloidal release is less important except for Fe, P, and Ni.
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Affiliation(s)
- Henning Schroeder
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany.
| | - Anne-Lena Fabricius
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Dennis Ecker
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Thomas A Ternes
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Lars Duester
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany
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Brandt T, Vieweg M, Laube G, Schima R, Goblirsch T, Fleckenstein JH, Schmidt C. Automated in Situ Oxygen Profiling at Aquatic-Terrestrial Interfaces. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:9970-9978. [PMID: 28800225 DOI: 10.1021/acs.est.7b01482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Optical sensing technologies provide opportunities for in situ oxygen sensing capable of capturing the whole range of spatial and temporal variability. We developed a miniaturized Distributed Oxygen Sensor ("mDOS") specifically for long-term in situ application in soil and sediment. The mDOS sensor system enables the unattended, repeated acquisition of time series of in situ oxygen profiles at a subcentimeter resolution covering a depth of up to one meter. As compared to existing approaches, this provides the possibility to reveal highly variable and heterogeneous oxygen dynamics at a high, quasi-continuous resolution across both scales. The applicability of the mDOS to capture both intra- and interday fine-scale variability of spatiotemporal oxygen dynamics under varying hydrological conditions is exemplarily demonstrated. We specifically aim at estimating the dependency between oxygen dynamics and hydrologic conditions along the measured profiles. The mDOS system enables highly detailed insights into oxygen dynamics in various aquatic and terrestrial environments and in the inherent transition zones between them. It thus represents a valuable tool to capture oxygen dynamics to help disentangling the coupling between underlying hydrological and biogeochemical process dynamics.
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Affiliation(s)
| | | | | | - Robert Schima
- Chair of Ocean Engineering, University of Rostock , Rostock 18059, Germany
| | - Tobias Goblirsch
- Faculty of Economics and Management Science, Chair of Information Management, University of Leipzig , Leipzig 04109, Germany
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Schroeder H, Fabricius AL, Ecker D, Ternes TA, Duester L. Metal(loid) speciation and size fractionation in sediment pore water depth profiles examined with a new meso profiling system. CHEMOSPHERE 2017; 179:185-193. [PMID: 28365504 DOI: 10.1016/j.chemosphere.2017.03.080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/15/2017] [Accepted: 03/20/2017] [Indexed: 06/07/2023]
Abstract
In an exemplary incubation study with an anaerobic sediment sampled at an oxbow of the river Lahn in Germany (50°18'56.87″N; 7°37'41.25″E) and contaminated by former mining activity, a novel meso profiling and sampling system (messy) is presented. Messy enables a low invasive, automated sampling of pore water profiles across the sediment water interface (SWI), down to ∼20 cm depth with a spacial resolution of 1 cm. In parallel to the pore water sampling it measures physicochemical sediment parameters such as redox potential and pH value. In an incubation experiment of 151 days the ability of the setup was proven to address several different aspects relevant for fresh water and marine sediment studies: (i) The influence of mechanical disturbance and oxygen induced acidification on the mobility of 13 metals and metalloids (Cd, Co, Cu, Fe, Mn, Mo, Ni, Sb, U, V, Zn) was quantified based on 11 profiles. The analytes were quantified by inductively coupled plasma-mass spectrometry. Three groups of elements were identified with respect to the release into the pore water and the overlying water under different experimental conditions. (ii) The capability to investigate the impacts of changing physicochemical sediment properties on arsenic and antimony (III/V) speciation is shown. (iii) An approach to obtain information on size fractionation effects and to address the colloidal pore water fractions (0.45 μm-16 μm) was successfully conducted for the elements Ag, As, Cu, Fe and Mn.
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Affiliation(s)
- Henning Schroeder
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Anne-Lena Fabricius
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Dennis Ecker
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Thomas A Ternes
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Lars Duester
- Federal Institute of Hydrology, Division G - Qualitative Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany.
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Fabricius AL, Duester L, Ecker D, Ternes TA. Metal and Metalloid Size-Fractionation Strategies in Spatial High-Resolution Sediment Pore Water Profiles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:9506-9514. [PMID: 27504804 DOI: 10.1021/acs.est.6b02843] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Sediment water interfaces (SWIs) are often characterized by steep biogeochemical gradients determining the fate of inorganic and organic substances. Important transport processes at the SWI are sedimentation and resuspension of particulate matter and fluxes of dissolved materials. A microprofiling and micro sampling system (missy), enabling high resolution measurements of sediment parameters in parallel to a direct sampling of sediment pore waters (SPWs), was combined with two fractionation approaches (ultrafiltration (UF) and cloud point extraction (CPE)) to differentiate between colloidal and dissolved fractions at a millimeter scale. An inductively coupled plasma-quadrupole mass spectrometry method established for volumes of 300 μL enabled the combination of the high resolution fractionation with multi-element analyzes. UF and CPE comparably indicated that manganese is predominantly present in dissolved fractions of SPW profiles. Differences found for cobalt and iron showed that the results obtained by size-dependent UF and micelle-mediated CPE do not necessarily coincide, probably due to different fractionation mechanisms. Both methods were identified as suitable for investigating fraction-related element concentrations in SPW along sediment depth profiles at a millimeter scale. The two approaches are discussed with regard to their advantages, limitations, potential sources of errors, further improvements, and potential future applications.
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Affiliation(s)
- Anne-Lena Fabricius
- Department G2, Aquatic Chemistry, Federal Institute of Hydrology , Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Lars Duester
- Department G2, Aquatic Chemistry, Federal Institute of Hydrology , Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Dennis Ecker
- Department G2, Aquatic Chemistry, Federal Institute of Hydrology , Am Mainzer Tor 1, 56068 Koblenz, Germany
| | - Thomas A Ternes
- Department G2, Aquatic Chemistry, Federal Institute of Hydrology , Am Mainzer Tor 1, 56068 Koblenz, Germany
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Guan DX, Williams PN, Luo J, Zheng JL, Xu HC, Cai C, Ma LQ. Novel precipitated zirconia-based DGT technique for high-resolution imaging of oxyanions in waters and sediments. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:3653-61. [PMID: 25655234 DOI: 10.1021/es505424m] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Water-sediment exchange is a fundamental component of oxyanion cycling in the environment. Yet, many of the (im)mobilization processes overlay complex spatial and temporal redox regimes that occur within millimeters of the interface. Only a few methods exist that can reliably capture these porewater fluxes, with the most popular being high-resolution diffusive gradients in thin films (HR-DGT). However, functionality of HR-DGT is restricted by the availability of suitable analyte binding agents within the sampler, which must be simple to cast and homogeneously distributed in the binding layer, exhibit adequate sorption capacities, be resistive to chemical change, and possess a very fine particle size (≤10 μm). A novel binding layer was synthesized to meet these requirements by in situ precipitation of zirconia into a precast hydrogel. The particle diameter≤0.2 μm of zirconia in this precipitated gel was uniform and at least 50-times smaller than the conventional molding approach. Further, this gel had superior binding and stability characteristics compared with the commonly used ferrihydrite HR-DGT technique and could be easily fabricated as an ultrathin gel (60 μm) for simultaneous oxygen imaging in conjunction with planar-optodes. Chemical imaging of anion and oxygen fluxes using the new sampler were evaluated on Lake Taihu sediments.
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Affiliation(s)
- Dong-Xing Guan
- †State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Paul N Williams
- ‡Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast BT9 7BL, United Kingdom
| | - Jun Luo
- †State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Jian-Lun Zheng
- †State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Hua-Cheng Xu
- §State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Chao Cai
- ∥Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Lena Q Ma
- †State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, China
- ⊥Soil and Water Science Department, University of Florida, Gainesville, Florida 32611, United States
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