Sedimentary records of microplastic pollution from coastal Louisiana and their environmental implications

Culligan, Nicholas; Liu, Kam‐biu; Ribble, Kathryn; Ryu, Junghyung; Dietz, Marianne

doi:10.1007/s11852-021-00847-y

Cited by 16 publications

(7 citation statements)

References 48 publications

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“…Nine studies collected sediment cores to depths of 95 cm to investigate the temporal variation of MPs. Most cores taken from marine (Matsuguma et al 2017;Chen et al 2020;Zheng et al 2020;Simon-Sánchez et al 2022), estuarine (Matsuguma et al 2017;Culligan et al 2022), and lake (Turner et al 2019;Welsh et al 2022b;Li et al 2023) sites demonstrated a decrease in MP concentration from surface to bottom, punctuated by sporadic peaks (Fig. 1).…”

Section: Resultsmentioning

confidence: 99%

Microplastic in Dredged Sediments: From Databases to Strategic Responses

Wilkens,

Calomeni-Eck,

Boyda

et al. 2024

Bull Environ Contam Toxicol

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Microplastics (MPs) accumulate in sediments, yet guidelines for evaluating MP risks in dredged sediments are lacking. The objective of this study was to review existing literature on MPs in sediments to improve fundamental knowledge of MP exposures and develop a publicly available database of MPs in sediments. Twelve percent of the reviewed papers (nine studies) included sediment core samples with MP concentrations generally decreasing with depth, peaking in the top 15 cm. The remaining papers evaluated surficial grab samples (0 to 15 cm depth) from various water bodies with MPs detected in almost every sample. Median MP concentrations (items/kg dry sediment) increased in this order: lakes and reservoirs (184), estuarine (263), Great Lakes nearshore areas and tributaries (290), riverine (410), nearshore marine areas (487), dredge activities (817), and harbors (948). Dredging of recurrent shoaling sediments could be expected to contain MPs at various depths with concentrations influenced by the time elapsed since the last dredging event. These results offer key insights into the presence and variability of MPs in dredged sediments, informing environmental monitoring and risk assessment strategies.

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Section: Resultsmentioning

confidence: 99%

Microplastic in Dredged Sediments: From Databases to Strategic Responses

Wilkens,

Calomeni-Eck,

Boyda

et al. 2024

Bull Environ Contam Toxicol

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show abstract

“…A variety of factors, such as water source (lake, river, ocean), sediment provenance, vegetation type, and microbial activities, affect the chemical composition of coastal sediments. These factors leave detectable physical and chemical signatures that enable the identification of the temporally varying coastal stressors [ 5 , 14 , 37 ]. Ba and Br concentrations and six elemental index ratios (Ca/Rb, Zr/Rb, Ti/Rb, K/Ti, Mn/Rb, S/Rb) were used to infer the source of materials and the associated sedimentary processes.…”

Section: Discussionmentioning

confidence: 99%

“…K/Ti: Potassium (K) is an alkali metal, found in minerals derived from igneous rocks. Since K is associated with such fine-grained terrestrial clays as illite, potassium mica, and potassium feldspar [ 37 ], in estuarine environments high K/Ti values indicate fluvially-delivered small-grained minerals.…”

Section: Discussionmentioning

confidence: 99%

An integrated methodology for assessing ecosystem response to environmental stressors under changing climatic conditions in coastal wetlands

Ryu,

Liu,

McCloskey

et al. 2023

Heliyon

Self Cite

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“…Recent research about removing the MPs were mainly focused on various aquatic environments, drinking water treatment, and wastewater treatment scenarios. Some studies have found that there are also different shapes of MPs in marine sediments [ 114 ], but there were few studies on MPs removal from river and marine sediments. For MPs in marine sediments, they can be efficiently separated and removed by adsorption.…”

Section: Enrichment and Removal Technologies Of Microplastics In Aqua...mentioning

confidence: 99%