Showing papers in "Science of The Total Environment in 1989"

TL;DR: Although these processes are complex and interrelated, each must be considered to predict the aqueous concentrations, mobility, and toxicity of chromium in the environment.

TL;DR: In this paper, a review paper is presented on input, transformation and loss of native and added organic matter in soil and on principal effects of fresh organic matter addition on soil properties.

TL;DR: In this article, eleven standard and reference fulvic acids (FA) and humic acids (HA) of aquatic and terrestrial origin from the collection of the International Humic Substances Society have been studied by chemical and spectroscopic methods.

TL;DR: Well controlled studies involving human subjects have demonstrated beneficial effects of supplemental chromium on fasting glucose, glucose tolerance, blood lipids, insulin binding, and hypoglycemic blood glucose values and symptoms.

TL;DR: The available information shows that used motor oil is a very dangerous polluting product and as a consequence of its chemical composition, world-wide dispersion and effects on the environment, used motorOil must be considered a serious environmental problem.

TL;DR: In this paper, the adsorption capacity of agricultural byproducts, namely peat and rice hulls, for acidic and basic dyes has been investigated and compared with that of activated carbon.

TL;DR: The results show that 70% of the total activity of radiocesium and 60% of radioruthenium deposited in the spruce stand were retained initially in the canopy, while the total deposition was higher by 20 and 24%, respectively, than that observed in nearby grassland.

TL;DR: Analysis of the metals in the plant tissues showed that the foliar route is potentially of similar importance to the soil-root pathway as a route of transport to the exposed parts of the plants.

TL;DR: The overall results indicate that the transport and transformation of chromium can be predicted using kinetics data derived from a simplified laboratory experiment, the Eh-pH data and the aquatic system characteristics.

TL;DR: In this article, the possibility of a direct contribution of various classes of aliphatic moieties, occurring in extant organisms, to humic substances is considered. But the authors do not consider the possibility that these moieties are the precursors of alphatic biopolymers in higher terrestrial plants.

TL;DR: In this article, the conditions for obtaining quantitative high resolution C-13 NMR spectra of humic substances in solution and in the solid state are evaluated by determining the relevant relaxation times of the various groups of carbon atoms.

TL;DR: Mercury concentrations were variable among rivers, with the highest values found in samples from tributary forest rivers, and edible parts of locally consumed fish reached up to 2700 micrograms kg-1 wet wt, surpassing by almost five times the Brazilian advisory level for human consumption.

TL;DR: It is concluded that various explanations for the differences in pollutant residues, e.g. trophic level, feeding habit, body weight, association with the substrate, physiological equipment and abiotic factors, are valid.

TL;DR: In this article, methylmercury species were determined by aqueous-phase ethylation to the volatile dialkyl analogs, followed by cryogenic gas chromatographic (GC) separation.

TL;DR: Chromium(VI)-induced DNA damage disrupts the normal functioning of DNA in critical cellular processes, including transcription and replication, and has been examined in chick embryo liver in vivo.

TL;DR: In this article, the results of an ongoing program to investigate mechanisms regulating the aquatic biogeochemistry of Hg, unfiltered surface waters of eight rural lakes in northcentral Wisconsin were collected and analyzed for reactive and total Hg. Results indicate that Hg concentrations are considerably lower than previously reported, and approach levels observed in remote ocean waters.

TL;DR: In this paper, three doses of a municipal refuse compost were applied to a soil (Typic Haploxeralf) from Toledo (Spain). Subsequent changes in soil physical and chemical properties, and in the solubility of toxic metals in water and DTPA were studied.

TL;DR: The significant features of acute and chronic chromium toxicity are presented and appropriate attention is given to the complications of multiple valence states and solubility.

TL;DR: Examination of the form of arsenic accumulated by fish fed arsenocholine showed that most of the arsenic was accumulated as arsenobetaine, and two groups of fish had greatly elevated arsenic concentrations in their muscle tissue resulting from an estimated approximately 40% retention of ingested arsenic.

TL;DR: Various lines of evidence indicate that the PAH concentrations in vegetation are an indication of atmospheric deposition directly onto the above-ground plant portions, and that uptake and translocation of soil-bound PAHs is of minor importance.

TL;DR: In this article, a profile of heavy metals and major metals was determined in sediment cores from 18 small, headwater drainage and seepage lakes in Finland, and the results showed an increase of Pb deposition starting in the early 1800s.

TL;DR: In this article, a simple, reliable and novel method for the analysis of butylin compounds after extraction from sediments has been developed, which is based on a simple and reliable method.

TL;DR: In the central part of the Venice lagoon during the season of the highest macroalgal production, at the beginning of June 1987, showed that 85 km2, corresponding to 65% of the examined area, were covered by remarkable amounts of nitrophile macroalgae.

TL;DR: In this article, it was shown that surface water, groundwater and soil contain measurable amounts of adsorbable organic halogens (AOX), even in areas far from industrial activities.

TL;DR: The treatment of lakes with selenium has been found to be one of the few known methods of lowering the mercury content of fish quickly and easily.

TL;DR: Viscosity determinations, both on native sputum and on reconstituted human alpha-acid glycoprotein, indicate that either raising or reducing the pH from neutral results in an increase in viscosity.

TL;DR: In this paper, the problem of soil rejuvenation or aging by bomb-C or fossil fuel-C in conjunction with nutrient pool transfer and enhancement of organic matter production is described.

TL;DR: Both Cd-R andCd-B were high in Japan, medium in Korea and low in China, whereas Pb-R was low inJapan, and high in China and Korea, and possible causes of variation are discussed.

TL;DR: In bone there are indications that, due to microscopic differences in the distribution of the alpha-particle radiation dose, the efficiency of bone cancer induction may increase in the order americium-241 less than plutonium-239 less than neptunium-237.

TL;DR: In this article, a method is described for isolating humin from diverse samples by partitioning the organic components between methyl isobutyl ketone (MIBK) and an aqueous phase as a function of pH.