geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Ecotoxicological assessment of a recipient lake sediment of bleached-kraft pulping discharges


, : Ecotoxicological assessment of a recipient lake sediment of bleached-kraft pulping discharges. Environmental toxicology and chemistry 18(10): 2262-2267

We assessed the biological status of age-dated sediments in Lake Saimaa, a recipient lake for wastewaters from pulp and paper industry for more than 100 years that has also received kraft pulp bleaching wastewater since 1954. Adenosine triphosphate content dropped in the recipient sediment from the top 1 cm (deposited in the 1990s) to 4 to 6 cm below the sediment surface (deposited in 1980s) by a factor of 1,000 but increased again in deeper, older layers (23 cm). The dominant species in the diatom community, Aulacoseira alpigena and Cyclotella kutzingiana, disappeared and were replaced by Asterionella formosa in the 4- to 6-cm layer. This layer was three- to fivefold more toxic to Vibrio fischeri (as measured by the median effective concentration) and slightly genotoxic (as measured by the SOS-chromotest induction ratio, I(C)/I(0) for Escherichia coli PQ37) compared with the layers above and below it. The 4- to 6-cm layer also contained up to 4,900 mg of solvent-soluble organic halogen (per kilogram of sediment dry weight). Enzyme activity (chitinase, phosphatase, alpha-glucosidase, and beta-glucosidase) was detected at depths of 0 to 1 cm and 4 to 6 cm, and more than 90% of the enzymes were bound to the particulate matter. Ninety-seven percent of the organic halogen in the sediment was particle bound. Apparently, full ecological recovery occurred in the layer from 0 to 1 cm, which had accumulated in 1990s, after the discharging pulp mill discontinued use of Cl(2) in the bleaching process and installed full-scale biological treatment for the wastewaters.

US$19.90

DOI: 10.1002/etc.5620181021


Other references

Jouany, J.P., 1996: Effect of rumen protozoa on nitrogen utilization by ruminants. Results obtained during the past decade indicate clearly that protozoa are actively involved in the degradation of dietary and microbial proteins in the rumen. Because of the great ability of protozoa to ingest the particulate matter suspended in...

Imai, Y.; Matsumura, H.; Shino, A.; Oka, K.; Suzuoki, Z., 1977: Induction of aortic lipid deposition in a high-response (ExHC) rat fed a diet containing cholesterol and cholic acid. Male ExHC and Sprague--Dawley rats were fed a diet containing 3% cholesterol, 0.6% sodium cholate and 15% olive oil for 16 weeks. The ExHC rat is highly susceptible to dietary hypercholesterolemia. Aortas of the ExHC rats showed Sudan-stained depo...

Fesani, F.; Peracchia, A.; Visconti, W., 1958: Metabolic aspects & physiopathological findings in patients subjected to bilateral castration & adrenalectomy for cancer of the breast & prostate in advanced stage. I. Behavior of several urinary steroids, of circulating eosinophils & blood phosphatases. Chirurgia Italiana 10(1): 16-29

Langston, A.C.; Prosnitz, D.M.; Sarriot, E.G., 2015: Neglected value of small population-based surveys: a comparison with demographic and health survey data. We believe that global health practice and evaluation operate with misleading assumptions about lack of reliability of small population-based health surveys (district level and below), leading managers and decision-makers to under-use this valuabl...

Poole, M.; Lawson, K.A.; Edwards, G.; Meyer, T.; Garcia, N., 2012: Duodenal transection in child abuse. Journal of Trauma Nursing 18(4): 246-248

Kelley, K.S.; Manning, T.M., 1997: An assessment of the health habits and counseling practices of physicians. Medicine & Science in Sports & Exercise 29(5 SUPPL ): S236

Bethune Pierre de, 1938: Le probleme tectonique de lArdenne. Outlines the investigations which have been made, chiefly by the Felix Kaisin, on the tectonics of the Ardennes region, France.

Pettigrew, R.I.; Peterson, K.P.; Heetderks, W.; Seto, B., 2008: The National Institute of Biomedical Imaging and Bioengineering marks its first five years. Academic Radiology 14(12): 1448-1454

Jaynes, D.B.; Hatfield, J.L.; Meek, D.W., 1999: Water quality in Walnut Creek watershed: herbicides and nitrate in surface waters. Part of a special section on the investigation of water quality in the Walnut Creek watershed. A study of the surface water quality in the watershed is presented. The flow and concentrations of NO3-N and the herbicides atrazine, alachlor, metribuz...

Kurono, S.; Kurono, T.; Komori, N.; Niwayama, S.; Matsumoto, H., 2006: Quantitative proteome analysis and C-13-labeled iodoacetanilide using D-labeled N-ethylmaleimide by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. A new methodology for quantitative analysis of proteins is described, applying stable-isotope labeling by small organic molecules combined with one- or two-dimensional electrophoresis and MALDI-TOF-MS, also allowing concurrent protein identificat...