Showing papers in "Water Research in 1982"

TL;DR: In this paper, the authors measured the adsorption isotherms in solutions with ionic strengths of 0.01 at 25°C and measured over the arsenite and arsenate concentration range 10−7−10−3 M and the pH range 4−10.

TL;DR: In this article, the acidogenic dissimilation at 30°C of a 1% glucose containing medium (C-limited), the maximum specific growth rate and product distribution, was studied over the pH range from 4.5 to 7.9.

TL;DR: In this paper, a gel filtration technique afforded a good separation between metal complexed with bacterial extracellular polymers and free metal ions, and the complexation of polymers extracted from cultures of Klehsiella aerogenes and activated sludge with cadmium, nickel, manganese and cobalt was demonstrated.

TL;DR: In this article, the anaerobic acidification of a 1% glucose monohydrate containing medium, allowing carbon limited growth of microorganisms, was studied with respect to maximum dilution rate and product distribution, over the temperature range from 20 to 60°C.

TL;DR: In this article, the rate reduction of hexavalent chromium (Cr(VI) by metallic iron under a range of conditions was studied in batch systems and the rate constant was evaluated and found to have a value of 5.45 × 10−5 1 cm−2 min−1.

TL;DR: A space saving portable mini-diluter exposure system for testing early life stages of fish and invertebrates has been developed and successfully used both in the laboratory and on-site with single chemicals and with complex effluents.

TL;DR: In this article, a review of the literature relevant to the dynamics of microbial growth on soluble substrates and integrating the knowledge obtained into a unifying theory describing that growth is presented.

TL;DR: In this article, the adsorption behavior of Cu, Mn and Zn onto freshly precipitated iron oxyhydroxide as a function of pH and salinity was examined.

TL;DR: In this article, the effect of oxidized nitrogen (mainly nitrate) in preventing phosphate release from the sediment demonstrates the ability of oxidised nitrogen to buffer the redox potential of the surface sediment at a level high enough to prevent a release of phosphate.

TL;DR: The influence of filtration on the colloid content of a natural sample as a function of filter load has been studied in this article, where two membrane filters and one glass fibre filter are tested.

TL;DR: In this article, a mineral medium containing 1% (w/v) glucose as the main carbon source was subjected to one-phase and two-phase anaerobic digestion processes under comparable conditions.

TL;DR: Methods available for measuring biofilm accumulation are presented and their use in both laboratory studies and in the field for continuous monitoring of biofilm processes is discussed.

TL;DR: In this paper, a range of approaches to biomonitoring has been discussed, and a holistic evaluation of the integrity of biological systems is proposed, which includes the measurements of both biotic and abiotic structural and functional parameters.

TL;DR: The lake also supports a dense submersed macrophyte crop (areal weighted mean dry weight of about 220 g m −2 ) composed primarily of Elodea densa.

TL;DR: In this paper, the flux of groundwater through shallow-water sediments into Lake Mendota was calculated from hydrologic studies and was measured directly with seepage meters at 106 sites around the lake.

TL;DR: In this paper, the use of natural zeolites deposited at Tokaj mountain, Hungary, for ammonia removal from synthetic and municipal wastewaters was studied, and the optimal ion exchange conditions were as follows: Na-form clinoptilolite, 0.5-1.0 mm in particle size and about 5-7 BV h−1 loading rate.

TL;DR: In this article, the performance of cholesterol and 2,2,5,5-tetrachlorohiphenyl by particles from river water and treated sewage was studied in distilled water, sewage and river water.

TL;DR: A persulfate digestion method for particulate nitrogen and phosphorus in aufwuchs suspensions was tested on two types of dried materials and samples from a freshwater microcosm in this article.

TL;DR: Anaerobic fixed film reactors could be hydraulically loaded to 94 kg COD m −3 day −1 for a 24-hour period and regain normal performance 12-48 h after overloading as mentioned in this paper.

TL;DR: In this paper, coagulation-flocculation studies were carried out to identify and quantify the organic matter (TOC) fraction removed by Mg (OH)2 precipitation and the fraction removed due to CaCO3 precipitation in lime treatment of wastewater.

TL;DR: A semi logarithmic relationship was found between the maximum dilution rate and the acids produced and this relationship is briefly discussed.

TL;DR: In this article, the authors investigated the group composition and MW distribution of soluble organics in effluents from successive biological and chemical treatment stages, and found that most of the organics fell within the high MW range.

TL;DR: Extracellular polymer concentrations in activated sludge increased considerably with sludge age, showing a direct relationship with mixed liquor suspended solids, and metal uptake at this dilution rate showed a slight increase, suggesting that increased polymer concentrations enhanced metal adsorption.

TL;DR: Water quality data from a field study in which reclaimed water is injected directly at a rate of 61 s−1 into an aquifer in the Palo Alto Baylands on the margin of San Francisco Bay is presented in this article.

TL;DR: Chromium(VI) [Cr(VI)] is adsorbed as HCrO − 4 on iron(III) hydroxide at pH below 8.5 as mentioned in this paper.

TL;DR: Metal concentrations were measured in Chironomidae larvae, Crustacea plankton, as well as in various organs of mussels and fishes collected from the open water area of Lake Balaton, with significant differences in the metal concentrations of species and tissue.

TL;DR: In this paper, the authors distinguish between those processes that remove organic matter from the water phase of a river with an immediate oxygen consumption, as opposed to those that remove the organic matter by fixation at the bottom where it will be degraded with delayed consumption.