Microplastics in Lake Onego sediments: occurrence and accumulation patterns.

2021 ◽  
Author(s):  
Mikhail Zobkov ◽  
Natalia Belkina ◽  
Vladimir Kovalevski ◽  
Maria Zobkova ◽  
Tatiana Efremova ◽  
...  
Keyword(s):  
National Park ◽  
Extraction Efficiency ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Pulp And Paper Mill ◽  
Russian Science ◽  
Open Part ◽  
Sediment Samples ◽  
Kondopoga Bay ◽  
Medium Silt

<p>Lake Onego is the second largest lake in Europe. Sediment samples (23) were collected in different regions of the lake. Microplastics (MPs) were extracted from sediments with heavy liquid, oxidized and its abundance was determined using a microscope with a magnification of 40x. The extraction efficiency and the level of external contamination were evaluated, the results were blank-corrected. The anthropogenic origin of randomly selected MPs items was confirmed by Raman spectroscopy. MPs were detected in all samples. Maximum MPs abundances in sediments were observed in areas associated with the mouth of the second largest tributary of the lake – river Shuya and Petrozavodsk Bay (2244 ± 1901 pcs/kg DW; n= 6, p = 0.95), the open part of the lake (2356 ± 1689; n = 5, p = 0.95) and in Kizhi National Park (3413 ± 2005; n = 4, p = 0.95). In mean MPs abundance in Lake Onego was 2141±1144; n=22; p = 0.95).   Fibers dominated in most of the samples (64±14%; n=22; p = 0.95). It was established, that fibers accumulate in sediments together with medium silt fraction (0.01-0.05 mm). MPs abundance was extremely high in Kondopoga bay (217 000 pcs/kg DW) and was mainly represented by microcapsules, possibly due to impact of the wastewaters of the Pulp and Paper mill plant at this site. In mean, MPs abundance in Lake Onego sediments was at least two times higher, than was previously established in Baltic Sea with similar methodology. Further comprehensive assessment of MPs contamination rates and forecasting consequences of this contamination to ecosystem is an urgent need in current research.</p><p>The study was supported by the Russian Science Foundation grant number 19-17-00035.</p>

Distribution of Some Organic Compounds in the Receiving Waters of a Kraft Pulp and Paper Mill

1977 ◽  
Vol 34 (6) ◽  
pp. 830-837 ◽  
Author(s):  
B. Brownlee ◽  
W. M. J. Strachan
Keyword(s):  
Kraft Pulp ◽  
Paper Mill ◽  
Dehydroabietic Acid ◽  
Dioctyl Phthalate ◽  
Pulp And Paper ◽  
Pulp And Paper Mill ◽  
Sediment Samples ◽  
Water And Sediment ◽  
Receiving Waters ◽  
Water And Sediment Samples

Water, seston, sediment, and macrophyte samples were collected from Nipigon Bay, Lake Superior at distances up to 6.8 km from the effluent discharge of a kraft pulp and paper mill at Red Rock, Ontario. Fifteen compounds have been identified in mill effluent and six of these were found in samples from the Bay. Mill-related compounds were found most often in water and sediment samples, less often in seston samples, and in none of the macrophytes samples. Dehydroabietic acid, present in mill effluent in excess of 1 mg/ℓ, was found in most water and sediment samples and a few seston samples. This compound is a good indicator of the areal influence of the effluent. Palmitic acid and dioctyl phthalate were also widely distributed. Acetovanillone and sandaracopimaric acid were found in one water sample 1.0 km from the discharge. 7-oxodehydroabietic acid was found in five water samples at distances of up to 4.7 km from the discharge. This is apparently the first time that this compound has been reported in a mill effluent or in environmental samples.

Changes in biocenoses of Kondopoga Bay, Lake Onego, under the effect of effluents from a pulp and paper mill

2014 ◽  
Vol 41 (1) ◽  
pp. 78-86
Author(s):  
T. M. Timakova ◽  
T. P. Kulikova ◽  
I. A. Litvinova ◽  
T. N. Polyakova ◽  
M. T. Syarki ◽  
...  
Keyword(s):  
Paper Mill ◽  
Pulp And Paper ◽  
Pulp And Paper Mill ◽  
Kondopoga Bay

The Benefits of Biotreatment for Reducing the Effects of Pulp and Paper Mill Effluents on Fish Reproduction in Laboratory Tests

2008 ◽  
Vol 43 (2-3) ◽  
pp. 161-171 ◽  
Author(s):  
Pierre Martel ◽  
Tibor Kovacs ◽  
Virginie Bérubé
Keyword(s):  
Laboratory Tests ◽  
Egg Production ◽  
Pimephales Promelas ◽  
Paper Mill ◽  
Pulp And Paper ◽  
Reproductive Capacity ◽  
Fish Reproduction ◽  
Pulp And Paper Mill ◽  
Paper Mill Effluents ◽  
Gonad Size

Abstract Pulp and paper mill effluents have been reported to cause changes in reproductive indicators of fish in laboratory and field studies. These changes include reduced egg production and gonad size, and altered hormone levels and expression of secondary sex characteristics. We examined the performance of biotreatment plants for their potential in abating effects of pulp and paper mill effluents on fish reproduction under laboratory conditions. A bleached kraft mill effluent (BKME) treated in an aerated lagoon and a thermomechanical pulp mill effluent (TMPE) treated by aerobic sludge in a sequential batch reactor were selected for study. Mature fathead minnows (Pimephales promelas) were exposed to effluents before and after biotreatment under continuous renewal conditions for 21 days. Egg production was monitored daily, while morphometric parameters (length, weight, gonad size), secondary sexual characteristics, and steroid hormone and vitellogenin levels were measured at the end of the effluent exposure. The effluent from both mills before biotreatment impaired the reproductive capacity of minnows (egg production) at concentrations of 10 and 20% vol/vol, but not at 2% vol/vol. Exposure to biotreated effluents from both mills at concentrations of 2, 10, 20, and 40% vol/vol caused no significant differences in overall reproductive capacity of minnows as compared with controls. These results indicate that biotreatment can significantly improve the quality of a BKME and an effluent from a TMP mill with respect to the reproductive capacity of fish as determined in laboratory tests.

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