Showing papers in "Journal of Hazardous Materials in 2005"

TL;DR: It is concluded that pharmaceutical substances with a high metabolic rate in humans (low excretion rate) do not necessarily induce a short lifetime in aquatic environments.

TL;DR: The results indicate the potential application of this method for effluent treatment in industries and also provide strong evidence to support the adsorption mechanism proposed.

TL;DR: A deeper understanding of adsorption behavior of Pb(II) from aqueous systems onto activated carbon and treated activated carbon has been attempted via static and column mode studies under various conditions and the Bohart-Adams model has provided an objective framework to the subjective interpretation of the adsorbent system.

TL;DR: The result shows that the rubber wood sawdust activated carbon can be efficiently used for the treatment of wastewaters containing chromium as a low cost alternative compared to commercial activated carbon and other adsorbents reported.

TL;DR: The adsorption process was found to be pH and concentration dependent and the sorption rate and sorption capacity of metal ions could be significantly improved by increasing pH value.

TL;DR: The adsorption of hexavalent chromium (Cr(VI) is maximal at the lowest values of pH (pH 3) and increases with temperature for both adsorbents and the activation energy and the pre-exponential factor as well as the thermodynamic functions related to advertisersorption reaction were determined.

TL;DR: This is the first report of removal of the highly toxic Pb, Cd, and other heavy metals in binary and ternary systems based on the biosorption by an agrowaste, and the potential of application for the treatment of solutions containing theseheavy metals in multimetal solutions is indicated.

TL;DR: The central composite design (CCD) technique was used to study the effect of the Fenton's peroxidation on the removal of organic pollutants from olive oil mill wastewater and H2O2-to-Fe(II) ratio had significant effect on all the four dependent variables.

TL;DR: The results of the thermodynamic investigations indicate that the adsorption reactions are spontaneous, slightly endothermic, slightlyendothermic and irreversible.

TL;DR: It is demonstrated that Fenton's reagent can effectively degrade leachate organics andSludge settling characteristics were much improved with the addition of the proper polymer and temperature gave a positive effect on organic removal.

TL;DR: A predictive approach seems useful to identify pharmaceuticals in the environment and give an idea of overall levels of contamination, so as to restrict monitoring to those molecules most likely to be contaminants.

TL;DR: The results of ozonation experiments on amoxicillin-containing aqueous solutions indicate that ozone attack is mainly directed towards the phenolic ring of the studied molecule leading to the formation of hydroxyderivative intermediates.

TL;DR: The results in this study indicated that peanut hull was an attractive candidate for removing cationic dyes from dye wastewater.

TL;DR: In this article, the adsorption of acid blue 193 (AB193) onto dodecylethyldimethylammonium (DEDMA)-sepiolite was investigated in aqueous solution in a batch system with respect to contact time, pH and temperature.

TL;DR: The test results using real wastewater indicated that fly ash could be used as a cheap adsorbent for the removal of heavy metals in aqueous solutions if not strongly acidic.

TL;DR: The results evidenced the relevant modifications of the risk indexes caused by domino effect and the importance of including the quantitative analysis ofDomino effect in QRA, in order to correctly assess and control the risk caused by escalation scenarios.

TL;DR: In this paper, the adsorption of acid red 57 (AR57) onto surfactant-modified sepiolite was investigated in aqueous solution in a batch system with respect to contact time, pH and temperature.

TL;DR: The biodegradability was significantly improved, which allowed an almost total removal of COD and color by a sequential activated sludge process, and gel permeation chromatography (GPC) has showed a substantial agreement on the cleavage of large organic compound into smaller ones.

TL;DR: The treated red mud showed a general high metal trapping capacity and the release at low pH was generally low, and the possibility to use this material for treating contaminated waters and soils was evaluated.

TL;DR: Bottom Ash, a power plan t waste material and De-Oiled Soya, an agriculture waste product were successfully utilized in removing trisodium 2-hydroxy-1-(4-sulphonato-1-naphthylazo)naphthalene-3,6-disulPHonate--a water-soluble hazardous azo dye (Amaranth).

TL;DR: The results suggest that magnetite particles and amorphous iron oxyhydroxides present in the EC products remove arsenic(III) and arsenic(V) with an efficiency of more than 99% from groundwater in a field pilot scale study.

TL;DR: It was indicated that the adsorption of copper(II) ions onto C. annuum seeds could be described by the pseudo-second-order kinetic model and also followed the intraparticle diffusion model up to 60 min, but diffusion is not only the rate controlling step.

TL;DR: The sorption of hexavalent chromium, Cr(VI), from aqueous solutions on macroporous resins containing tertiary amine groups (Lewatit MP 62 and Lewatit M 610) was studied at varying Cr( VI) concentrations, adsorbent dose, pH, contact time and temperatures.

TL;DR: The results indicated that synthetic zeolite A can be used as an efficient ion exchange material for the removal of zinc and cadmium ions from industrial and radioactive wastewaters.

TL;DR: It was observed that the adsorption data conforms to the second degree kinetics model and the experimental data conformed to Langmuir isotherm model.

TL;DR: The steps of an ecological risk assessment and management framework related to hospital effluents evacuating into wastewater treatment plant (WWTP) without preliminary treatment are presented and the results of its application on wastewater from an infectious and tropical diseases department of a hospital of a large city in southeastern France are presented.

TL;DR: The kinetic parameters obtained in a batch process were used to scale-up the process on a mini-column and to choose the breakthrough model, and experimental data concerning the volumes treated were correlated using the bed depth service time model.

TL;DR: The column results indicated that a filtration system consisting of an iron column and a sand filter could be used for treatment of arsenic in drinking water.

TL;DR: The biosorption of Acid red 88, Acid green 3 (AG3) and Acid orange 7 (AO7) by deactivated fresh water macro alga Azolla filiculoides was investigated in batch mode and the Bed Depth Service Time model and the Thomas model were used to analyze the experimental data and the model parameters were evaluated.

TL;DR: The coffee grounds based activated carbon may be promising for phenol and dye removal from aqueous streams as it is well suited to fit the adsorption isotherm data.