Effects of resuspension on the mobility and chemical speciation of zinc in contaminated sediments

Xie, Minwei; Alsina, Marco A.; Yuen, Jeffrey; Packman, Aaron I.; Gaillard, Jean François

doi:10.1016/j.jhazmat.2018.10.043

Cited by 43 publications

(21 citation statements)

References 68 publications

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“…Through sediment resuspension in the water column, remobilization of trace metals comes out either as a removal (adsorption or co-precipitation onto particles) or as a desorption from particles (Calmano et al, 1993;Dang et al, 2020Dang et al, , 2015bXie et al, 2019). In our study, after 2 weeks of contact time without addition of NaN 3 , most of the analyzed elements (Li, Mo, Sb, Cs, Pb, U, V, Mn, Co, Ni, Cu, Zn, Sr, Ba and As) had undergone a desorption from the particles (representative examples are shown in Figure 1.C and D).…”

Section: Resuspension Experiments Without Sodium Azidementioning

confidence: 99%

Have decades of abiotic studies in sediments been misinterpreted?

Layglon

Misson

Mounier

et al. 2020

Science of The Total Environment

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Sterilization techniques are largely employed to distinguish biotic and abiotic processes in biogeochemical studies as they inhibit microbial activity. Since one century, chemical sterilizers, supposed to preserve original environmental samples, have taken precedence over physical sterilization techniques considered too destructive. Sodium azide (NaN 3) is nowadays the most commonly used inorganic chemical sterilizer. It is sufficiently purified to study trace metals, as well. Nevertheless, its (in)activity in physico-chemical processes was never ascertained. Through the investigation of sediment resuspension in seawater, the present work unequivocally demonstrated that NaN 3 can impact carbon and balance and pH. Unlike decades of blind practice, NaN 3 should be used with great care to track abiotic processes from organic matter rich and reductive matrices.

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Section: Resuspension Experiments Without Sodium Azidementioning

confidence: 99%

Have decades of abiotic studies in sediments been misinterpreted?

Layglon

Misson

Mounier

et al. 2020

Science of The Total Environment

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“…The present paper aim to contextualize the problem of MPs in freshwater systems from a global point of view, focusing on the role of MPs in sediment, and, in turn, the interaction with benthic organisms: sediments can be a sink of MPs [22] and uptake of MPs from the surrounding environment occurs by benthic organisms [23]. Furthermore, sediments can act as a retention site for contaminants and toxic elements [24], which may interact with plastics and increase their potential bioaccumulation [25].…”

Section: Introductionmentioning

confidence: 99%

Microplastic Contamination in Freshwater Environments: A Review, Focusing on Interactions with Sediments and Benthic Organisms

et al. 2020

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Plastic is one of the most commonly produced and used materials in the world due to its outstanding features. However, the worldwide use of plastics and poor waste management have led to negative impacts on ecosystems. Plastic degradation in the environment leads to the generation of plastic particles with a size of <5 mm, which are defined as microplastics (MPs). These represent a global concern due to their wide dispersion in water environments and unclear potential ecotoxicological effects. Different studies have been performed with the aim of evaluating the presence and impacts of MPs in the marine environment. However, the presence of MPs in freshwater systems is still poorly investigated, making data retrieval a difficult task. The purpose of this review is to identify the main aspects concerning MPs pollution sources in lakes and rivers, with a focus on freshwater sediments as a site of accumulation and as the habitat of benthic organisms, which are key components of food webs and play a fundamental role in energy/contaminant transfer processes, but are still poorly considered. Through this review, the sources and fate of MPs in freshwater are analysed, ecotoxicological studies focused on sediments and benthic fauna are exposed, the most frequently used sampling and analysis strategies are reported, and future trends of MPs analysis in this field are proposed.

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“…30,31 During resuspension, metals initially stabilized in low-bioavailability forms in anoxic environments may readily undergo fast changes in metal speciation during resuspension owing to shifts from anoxic to oxic conditions. 30,32 Oxidation of reduced metal sulfide mineral phases produces metal species with greater solubility and mobility 33,34 and potentially alters the metal bioavailability.…”

Section: Introductionmentioning

confidence: 99%

Application of a Multi-Metal Stable-Isotope-Enriched Bioassay to Assess Changes to Metal Bioavailability in Suspended Sediments

Zheng

Simpson

et al. 2021

Environ. Sci. Technol.

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The direct measurement of particulate contaminant bioavailability is a challenging aspect for the environmental risk assessment of contaminated sites. Here, we demonstrated a multi-metal stable-isotope-enriched bioassay to simultaneously measure the bioavailability of Cd, Cu, and Zn in naturally contaminated sediments following differing periods of resuspension treatment. Freshwater filter-feeding clams were pre-labeled with the isotopes 114Cd, 65Cu, and 68Zn to elevate isotope abundances in their tissues and then exposed to metal-contaminated suspended sediments. The assimilation of sediment-associated metals by clams would decrease the isotope ratios (Cd114/111, Cu65/63, and Zn68/64) in tissues, providing a direct measurement of metal bioavailability. For the sediments tested here, the method revealed bioavailable cadmium and non-bioavailable copper in sediments but was inconclusive for zinc. With a longer resuspension time, the bioavailability of particulate cadmium increased, but that of copper was unaffected. Metal bioavailability predicted using traditional wet-chemical extraction methods was inconsistent with these findings. The study indicated that multi-metal stable-isotope-enriched bioassay provides a new tool for directly assessing metal bioavailability in sediments, and this method is amenable for use in in situ assessments.

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Effects of resuspension on the mobility and chemical speciation of zinc in contaminated sediments

Cited by 43 publications

References 68 publications

Have decades of abiotic studies in sediments been misinterpreted?

Have decades of abiotic studies in sediments been misinterpreted?

Microplastic Contamination in Freshwater Environments: A Review, Focusing on Interactions with Sediments and Benthic Organisms

Application of a Multi-Metal Stable-Isotope-Enriched Bioassay to Assess Changes to Metal Bioavailability in Suspended Sediments

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