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Showing papers in "Water Research in 1988"


Journal ArticleDOI
TL;DR: In this paper, the concentration of hydrogen peroxide (H2O2) in distilled water, drinking water and in different types of surface and rain waters can be easily determined by a photometric method in which N,N-diethyl-p-phenylenediamine (DPD) is oxidized by a peroxidase catalyzed reaction.

819 citations


Journal ArticleDOI
TL;DR: In this article, a voltammetric methodology was developed to measure (without prior separation of the solid phase) the metal ions in solution in the presence of algae and to assess the binding of metals to the surfaces of algae.

326 citations


Journal ArticleDOI
TL;DR: In this article, the fluxes of linear alkylbenzenesulphonates (LAS), nonylphenol (NP), NP1EO and NP2EO through sewage and sludge treatment of 29 Swiss sewage treatment plants were investigated.

258 citations


Journal ArticleDOI
TL;DR: In this article, the cation composition of a clinoptilolite from the Ash Meadows deposit was characterized after samples were exposed to varying amounts and concentrations of sodium chloride solution.

138 citations


Journal ArticleDOI
TL;DR: Investigation for alternate sources of NADH was undertaken in the anaerobic-aerobic activated sludge process for enhanced phosphorus removal and concluded that intracellular carbohydrates are consumed via the Embden-Meyerhoff-Paranas pathway and converted to acetyl-CoA, which provides NADH required for PHB synthesis.

135 citations


Journal ArticleDOI
TL;DR: In this paper, the competitive binding of protons and metal ions (Al3+, AlOH2+, Ca2+) by humic substances (HS) in the pH range 3-6 and at different ionic strengths, and the net humic charge was calculated.

132 citations


Journal ArticleDOI
TL;DR: In this paper, total concentrations of Cu and Pb and the speciation of these metals in sediments of the River Tenes are studied in order to establish the extent to which they are polluted and their capacity of remobilization.

129 citations


Journal ArticleDOI
TL;DR: In this article, the authors investigated the role of nitrilotriacetic acid (NTA) as a presursor for trichloronitromethane (TCNM) formation in Lake Zurich and Greifensee.

108 citations


Journal ArticleDOI
TL;DR: In this paper, the ozone-hydrogen peroxide (O3/H2O2) system was applied in a closed reactor with oxalic acid and 1,1,2 trichloroethane.

106 citations


Journal ArticleDOI
TL;DR: The kinetics of the adsorption of four dyestuffs onto bagasse pith has been studied in this article, where two basic dyes, Basic Blue 69 and Basic Red 22, and two acid dyes were used in an agitated batch adsorber.

104 citations


Journal ArticleDOI
TL;DR: In this article, a biofilm reactor, termed the permeable-support biofilm (PSB), was developed in which oxygen was supplied to the interior of the biofilm through a permeable membrane.

Journal ArticleDOI
TL;DR: The identification and elimination of resin artifacts are discussed as well as the possible mutagenic potential of these artifacts or of their disinfection by-products, principally resulting from their reaction with chlorine.

Journal ArticleDOI
TL;DR: In this article, the precipitation of calcite from natural lake water was studied in laboratory experiments under controlled conditions; water from Lake Constance filtered through 0.2 μm membranes was used, temperature was 15°C, saturation index was adjusted to about 50 and calcium carbonate seed crystals of defined particle size were added.

Journal ArticleDOI
TL;DR: Results of pure culture experiments indicate that Nitrobacter is capable of growing effectively in the absence of dissolved oxygen.

Journal ArticleDOI
TL;DR: Experimental evidence indicated that the flow through the flocs containing biomass carriers was seriously impeded as compared to the flowThrough flocS without carriers.

Journal ArticleDOI
TL;DR: The mobility of arsenic in the sediment of Lake Ohakuri, a hydroelectric lake on the Waikato River in New Zealand, was studied during the stratification period in 1985/1986 as mentioned in this paper.

Journal ArticleDOI
TL;DR: Ozone pretreatment studies of humic acids were conducted to evaluate the effects of ozonation on the biodegradability of the oxidation products as a function of COD-, DOC-elimination, decrease of u.v.-absorbance and ozone consumption as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this article, seasonal patterns in phosphorus release from sediments of the Loosdrecht Lakes were studied in the laboratory in a continuous flow system, and a conceptual model based upon mineralization and precipitation processes was employed to explain the results obtained.

Journal ArticleDOI
TL;DR: In this paper, the authors describe experimental studies and numerical modeling of the sorption of hydrophobic contaminants by aquifer materials using completely mixed batch reactors and demonstrate that sorption equilibria are nonlinear for the systems studied.

Journal ArticleDOI
TL;DR: Combined ion exchange/biological denitrification is a process for nitrate removal from ground water in which nitrate is removed by an ion exchanger and the resins are regenerated in a closed circuit through a biological denitification reactor.

Journal ArticleDOI
TL;DR: The potential of a natural wetland as a site for nitrogen removal from secondary treated effluent was examined by investigating the distribution of denitrification rates and activity in soils and decaying plant material.

Journal ArticleDOI
TL;DR: In this paper, a plant site survey was made of 30 municipal wastewater treatment plants concerning the operational characteristics of their anaerobic sludge digesters, and samples of each sludge were then assayed to determine the residual gas production rate, the maximum potential acetate and propionate utilization rates, the 5 and 30 day biochemical methane potential (BMP5) (bMP30), and the possible limitation in bioavailability of iron, cobalt or nickel.

Journal ArticleDOI
TL;DR: The reductive dechlorination of chlorinated aromatic compounds was studied in anaerobic upflow bioreactors with chlorinated phenols as the sole carbon and energy source and ability to degrade a mixture of all three monochlorophenols and 3,4,5-trichlorophenol was demonstrated.

Journal ArticleDOI
TL;DR: In this article, it is shown that accounting for the variability corresponds to an increase in pollutant transport for extreme events by a factor of 2-3, and this ought to be of significance to the design of combined sewer overflows.

Journal ArticleDOI
TL;DR: In this paper, the effect of secondary fixed-film biomass on the occurrence of filamentous microorganisms in the biocenosis of activated sludge and on nitrification has been studied in four laboratory systems.

Journal ArticleDOI
TL;DR: Concentrations of TBT exceeding the LC 50 values reported for both copepod species have been found in the water column from marinas in northern Chesapeake Bay.

Journal ArticleDOI
TL;DR: A full-scale, automated leachate treatment plant has been operated since mid 1983 at the Bryn Posteg Landfill Site, operated by Montgomery District Council in mid-Wales.

Journal ArticleDOI
TL;DR: In this article, the use of hydrogen peroxide in combination with ultraviolet radiation in the treatment of wastewaters from the chlorination and alkaline extraction stages of paper pulp bleaching was examined.

Journal ArticleDOI
TL;DR: In this article, a sedimentation field-flow fractionation (FFF) method was used to produce fractograms of suspended river colloidal matter, which are plots representing the content of particulate material at different elution volumes following the separation.

Journal ArticleDOI
TL;DR: In this paper, a mass transfer equation for the movement of biodegradable materials from the water column of shallow streams to the biofilm-colonized surfaces of sand-free gravel and cobble streambeds was developed.