To date, the largest Russian rivers discharging to Arctic Ocean remain a “blank spot” on world map of data distribution microplastics in freshwater systems. This study characterizes abundance and morphology surface water Ob River its large tributary, Tom River, western Siberia. The average number particles for two ranged from 44.2 51.2 items per m3 or 79.4 87.5 μg respectively. Of recovered microplastics, 93.5% were less than 1 mm their dimension, group (45.5% total counts) consisted with...

Microplastics (MPs) are emergent pollutants in freshwater environments and may impact aquatic organisms, including those of nutritional value. The specific activities digestive antioxidant enzymes can be used as good bioindicators the potential effects MPs on fish case waterborne MP contamination. In this study, we fluorescent polystyrene microplastics (PS-MPs) to analyze alterations enzyme larvae Coregonus peled Gmelin (peled or Northern whitefish), one most valuable commercial species...

Airborne microplastics are emerging pollutants originating from disposable tableware, packaging materials, textiles, and other consumer goods. Microplastics vary in shape size exposed to external factors break down into even smaller fractions. abundant both urban natural environments, including water bodies glaciers, as particles can travel long distances. The potential toxicity of airborne cannot be underestimated. Microparticles, especially those < 10 µm, entering the human body through...

This study is a pioneering attempt to count microplastics (MPs) in the Yenisei River system clarify role of Siberian Rivers transport MPs Arctic Ocean. The average content surface water large tributary, Nizhnyaya Tunguska River, varied from 1.20 ± 0.70 4.53 2.04 items/m3, tending increase along watercourse (p < 0.05). Concentrations bottom sediments two rivers were 235 83.0 543 94.1 with no tendency downstream increasing. Linear association (r = 0.952) between organic matter and counts...

The low production costs and useful properties of synthetic polymers have led to their ubiquitous use, from food packaging household products high-tech applications in medicine electronics. Incomplete recycling plastic materials results an accumulation waste, which slowly degrades produce tiny particles, commonly known as “microplastics” (MPs). MPs can enter water bodies, but only recently the problem MP pollution sea fresh waters has become clearly evident received considerable attention....

Microplastics (MPs) in aquatic environments can be associated with various substances, including persistent organic pollutants, which add to the problem of plastic ecotoxicity. The abundance 1-5 mm microplastics and concentrations particle-adsorbed organochlorine pesticides (OCPs) polychlorinated biphenyls (PCBs) sandy sediments from three beaches recreational areas along upper Ob River Western Siberia were assessed. MP pollution levels beach sands ranged 24 ± 20.7 104 46.2 items m

The paper contains a complete annotated list of freshwater ichthyofauna the Middle Ob River basin. is based on an analysis publications and results authors' research, it includes 43 species in two classes, 9 orders, 12 families, 30 genera. Ten all listed are introduced only seven naturalized. For each species, taxonomic comments provided where necessary conservation status, distribution within basin, abundance commercial value indicated. Latin English names given.

In the present paper, history of fish faunistic and taxonomic knowledge is analyzed, freshwater brackish water diversity in territory Russian Federation adjacent areas examined.An overview higher taxa species presented (3 classes, 26 orders, 100 families, 317 genera), including a total 719 native (plus 36 introduced species, also 16 not yet recoded for waters, but expected future, 20 that were previously removed from ichthyofauna Russia due to changes; number all categories 791 taxa).The...

The objective of the study was a pre-screening microplastic (MP) content in surface water and benthic sediments Kara Darya Chirchiq rivers, first-order tributaries Syr River (Uzbekistan). For first time, sediment samples were taken from this region, quantitative screening MPs 0.15–5.00 mm size performed. A combined visual μRaman-based methodology used to quantify characterize artificial polymer microparticles bottom two rivers. average abundance waters found be 4.28 ± 0.09 0.95 0.36 items...

Microplastic particles in the size range 0.15 to 5.00 mm were quantified and characterised gastrointestinal tracts of three wild freshwater fish (n = 141) from Ob Yenisei rivers, including common ruffe (Gymnocephalus cernua L.), Siberian dace (Leuciscus baicalensis Dybowski) European perch (Perca fluviatilis L.). Microplastics found tract 62% examined, ranging 18.5% sample 92.6% sample. The vast majority microplastics all species fibres (up 99.7% detected perch), followed by irregularly...

This preliminary study investigated the abundance of microplastic particles in gastrointestinal tracts dace (Leuciscus leuciscus L.) from Tom River, a large tributary Ob River West Siberia. A total 13 specimens 2+ to 4+ years age were studied. Microplastic extracted fish guts counted and classified by shapes sizes. In average 204 ± 28.7 items microplastics detected for one specimen. categorized as fragments irregular shape (70%), spheres (16%), films (7%) fibers (7%), with size ranging...

This study analyzed microplastics in the gastrointestinal tract of Siberian dace (Leuciscus leuciscus subsp. baicalensis (Dybowski, 1874)) remote Yenisei tributary Nizhnyaya (Lower) Tunguska River (Siberia, Russia). µRaman analysis showed that 60% fish from two different sites had ingested plastic microparticles (on average, 1.55 ± 1.95 items per individual). The most common type microplastic were fibers, and abundant size category was 300 to 1000 µm. In studied population, no significant...

Small lakes in areas of intensive crude oil production may be susceptible to pollution arising from accidental spills and leaks, eventually leading the bottom sediments. Effective cleaning aquatic sediments remains a challenge. Flotation is potentially simple reliable approach for cleanup without their excavation water body. Full-scale testing flotation-based technology using specially designed airlift plant allowed an unnamed boreal lake ('the lake') within Samotlor field, North Russia,...

Based on a critical analysis of scientific publications for the last 200 years and collected specimens, complete annotated list both typical freshwater ichthyofauna Sakhalin Island, with inclusion marine species that can be found in brackish coastal waters, is reported first time. The includes 226 classified three classes, 26 orders, 68 families, 29 subfamilies, 148 genera. For 160 species, information provided collection samples deposited various museums around world, 36 which are type...

Current methodologies for microplastic detection in the environment, including surface freshwaters, are imperfect; no standardized methods sampling and sample preparation available. The paper discusses issues of comparability surveys conducted by different methods. An intercalibration experiment carried out on Yenisei River two research labs – Research Center ‘Microplastic Siberia’, Tomsk State University, PlasticLab, Russian Hydrometeorological University is described detail, laboratory...

Oil contamination of bodies water in the Russian Federation is one most widespread impacts on ecosystems. The Khanty-Mansiysk autonomous district-Yugra, main oil extraction area Russia, oil-contaminated regions. article summarises data from hydrochemical research level petroleum hydrocarbons and bottom sediments located basin river Ob.

The paper describes a complex novel airlift plant for the simultaneous cleaning of water reservoir bottom sediments and water. plant's design was tested in model. Chemical analysis after experimental revealed total oil content 0.40–0.45 g kg−1, while estimated initial around 16 kg−1. This indicates 35.5–40.0 times decrease content.

Quantitative screening results of microplastics content in waters some Russian rivers different watersheds (Tobol, Tom, Tura, Irtysh, Ishim, Vyatka, Kama, Chusovaya and Pechora) are presented. The identified secondary forms prove the contribution plastic waste to river pollution. To better assess intensity pollution, nature sources carried by rivers, spatiotemporal studies recommended.

Experimental trial and manufacturing application of technologies devices for purification water bodies from oil petroleum products are developed at the premises Biological Institute National Research Tomsk State University. More attention is paid to treatment bottom sediments products. As a result contamination, some covered with continuous layer oil, have lost their commercial fishing importance. In 2004-2006 first time scientists University scientific technical association "Priborservice"...

This article presents the species composition of aquatic oligochaetes (Oligochaeta) in various regions Western Siberia. The history study Siberia is briefly reviewed. importance water bodies also evaluated.

Norm setting for oil and petroleum products concentration in bottom sediments of water bodies the Russian Federation is very important protection fishery bodies. The lack specified content standards different types extraction regions impedes projects to rehabilitate bodies, polluted by oil. paper discusses regional regulations on norm