Showing papers in "Waste Management in 2001"

TL;DR: Not only products of steel slags but also products of blast furnace slags have been eliminated from the European Waste Catalogue and the European Shipment of Waste Regulation of the European Community, as well as from the lists of OECD for transfrontier movements by the decision of the OECD-Council from 21 September, 1995.

TL;DR: The effectiveness of orange peel in adsorbing Acid violet 17 from aqueous solutions has been studied as a function of agitation time, adsorbent dosage, initial dye concentration and pH.

TL;DR: Attention was focused on the adsorption of rhodamine-B and acid violet by coir pith carbon using a variety of parameters such as agitation time, dye concentration, adsorbent dose and pH.

TL;DR: The results showed that the equilibrium data for all the mono-chlorinated phenol-sorbent systems fitted the Redlich-Peterson model best within the concentration range studied.

TL;DR: The study showed that the photo-Fenton process, (a mixture of hydrogen peroxide and ferrous or ferric ion), was the most effective treatment process under acidic conditions and produced a higher rate of degradation of p-chlorophenol at a very short radiation time.

TL;DR: Anaerobic treatability and methane generation potential of cheese whey were determined in batch reactors and nutrient and trace metal supplementation is vital for the anaerobic treatment of Cheese whey.

TL;DR: Values of deltaG degrees and deltaH degrees found show the spontaneous and endothermic nature of the process of Cu2+ uptake by natural zeolite, which suggests that the process can be easily carried out with a satisfactory rate.

TL;DR: R residue characteristics that control constituent leaching and testing approaches for evaluating leaching are discussed and quality control and potential improvement in case of beneficial application are addressed.

TL;DR: A two-stage study "Life cycle analysis of road construction and earthworks" was part of a more extensive Finnish research project "Assessment of the applicability of secondary products in earthworks".

TL;DR: The vitrification of zinc-hydrometallurgy wastes, electric arc furnace dust (EAFD), drainage mud, and granite mud was shown to immobilize the hazardous components in these wastes to highlight that the chemical stability is influenced by the glass structure formed, which, in turn, depends on the Si/O ratio in the glass.

TL;DR: The pyrolysis kinetics of waste PVC pipe was investigated with a thermal gravimetric analysis system at heating rates of 5, 10, and 30 degrees C/min in a nitrogen atmosphere, implying that the effects of additives may be less significant in comparison with that at the first-stage reaction.

TL;DR: The composition and leaching tests of the ferrochrome slag show that the chromium content is high, 1-3%, although leaching under normal conditions is very low, and there seemed to be a significant uptake of Cr by plants growing with their roots in the slag.

TL;DR: Magnetite, the main component of converter slag in the steel industry, can be used for the adsorption of Ni(II) from aqueous solutions, over a range of conditions: initial metal concentration, stirring times, adsorbent dosage and temperatures.

TL;DR: A sequential extraction procedure, whereby the material is sequentially leached with different leaching solutions, can be used as an aid to characterize the material and to determine which chemical conditions are needed to obtain a sufficient extraction efficiency.

TL;DR: It is found that the by-product--Bayer sodalite--has the high exchange capacity for Na+ that might contribute to the long-term environmental problems.

TL;DR: In order to receive high sulfate-reduction rates immobilization on porous materials proved to be advantageous and a process for the treatment of acidic waters containing high amounts of heavy metals and sulfate was designed.

TL;DR: It is concluded that for this type of treatment, the system composed of "strong" cationic resin and "weak" anionic resin is more appropriate.

TL;DR: The performance of aluminum sulfate in comparison to polyelectrolytes (chitosan and polyacrylamide) as conditioning chemicals for an emulsion waste was tested, and the predominant mechanisms acting in each case were analyzed.

TL;DR: This study examined different tests that show the importance of oxidation of aluminium in the swelling reaction and the efficiency of different treatments of MSWI bottom ash, and presented a special cell to measure the swelling pressure of these materials.

TL;DR: Results up to 28 days showed that these synthetic aggregates were capable of producing concretes with compressive strengths ranging from 33 to 51 MPa, equivalent to between 73 and 112% of that of the control concrete made with natural aggregates.

TL;DR: The field measurements show a more considerable growth in stiffness than the laboratory tests, with a doubled value two years after construction, neither in the laboratory nor in the field.

TL;DR: In this paper, the stabilisation/solidification process with Portland cement applied to municipal solid waste incineration residues was discussed, and two types of residues were considered: fly ash (FA) produced in an electrostatic precipitator, and air pollution control (APC) residues from a semi-dry scrubber process.

TL;DR: It is shown that ash derived from coal and sewage sludge co-firing contains generally less unburned carbon, alkali, magnesium oxide, chlorine, and sulfate than coal ash, and only the concentration of free lime in mixed ash is higher than in coal, even though, at least up to 25% of the thermal input, still below the requirements of the standards.

TL;DR: The Taiwan EPA has listed 14 industrial waste items for recycling and reuse, including waste paper, waste iron, coal ash, tempered high furnace bricks, furnace transfer bricks, sweetening dregs, wood (whole/part), glass (Whole/ part), bleaching earth, ceramics (pottery, brick, tile and cast sand), individual metal scraps.

TL;DR: Waste from olive oil production was co-fired with coal in a fluidised bed combustor to study the feasibility of using this waste as an energy source and the combustion efficiency and CO emission were investigated.

TL;DR: Application of a sequential biological (anaerobic/aerobic) system to treat the Dalaman SEKA Pulp and Paper Industry wastewater resulted in approximately 91% COD and 58% AOX removals at a HRT of 5 and 6.54 h for anaerobic and aerobic, respectively.

TL;DR: The Dutch building materials decree is one of the steps on the road towards a sustainable society and has proved to be an important element in judging the environmental quality of construction materials in a direct or indirect way, and a contribution to the management of waste materials.

TL;DR: Readingily integrated into the existing landfill infrastructure, this approach can safely and cost-effectively convert a MSW landfill from anaerobic to aerobic degradation processes, thereby effectively composting much of the organic portions of the waste.

TL;DR: Leaching values of hazardous heavy metals of produced stones sufficiently met the environmental standard on soil pollution of the Environment Agency with superior leaching behavior for the vitreous slag, thus confirming their safe applications.

TL;DR: Investigation of the enhanced leachability of fly ash containing Cr, by heating the chromium (III) oxide (Cr2O3)-spiked fly ash to 800 degrees C in atmospheres containing air, nitrogen gas, and 5% H2 + 95% N2, respectively, indicated that trivalent chromium was converted to its soluble hexavalent form during sintering in the air atmosphere.