Showing papers in "Journal of Hazardous Materials in 2004"

TL;DR: This paper presents an in-depth discussion and consideration of the factors that need to be addressed for optimum performance of this technology.

TL;DR: The potential of a common semiconductor, ZnO, has been explored as an effective catalyst for the photodegradation of two model dyes: Methylene Blue and Eosin Y and substantial reduction of COD was achieved.

TL;DR: The effects of the accelerated carbonation reaction on the solid phase are discussed and future potential applications of this technology are also considered.

TL;DR: The results indicate that the Mahogany sawdust carbon could be employed as a low cost alternative to commercial activated carbon in the removal of dyes from wastewater.

TL;DR: From the experiments, it is concluded that AST methods enhance cake dewaterability in two ways: they degrade EPS proteins and polysaccharides reducing the EPS water retention properties; and they promote flocculation which reduces the amount of fine flocs.

TL;DR: This review concentrates on recent advances in syntheses, potential formulations and space applications of potential compounds with respect to safety, performance and stability.

TL;DR: The excellent comparison of predicted and measured destruction efficiencies for a group of chlorinated aromatics stresses the validity of the design approach.

TL;DR: The kinetics and mechanism of methylene blue adsorption on perlite have been studied and it was shown that the second-order kinetic equation could best describe the sorption kinetics.

TL;DR: The process was successfully applied to the treatment of an electroplating wastewater where an effective reduction of (Cu2+, Zn2+ and Cr(VI)) concentrations under legal limits was obtained, just after 20 min.

TL;DR: Experimental data show that sepiolite activated by HCl was effective for nitrate removal, and three simplified kinetic models, i.e., first-, second-order and intraparticle diffusion were tested.

TL;DR: Reactive dye solutions have higher applicability of Fenton oxidation than disperse dye solutions due to their higher solubility, lower suspended solids concentrations and higher SCOD/TCOD ratios.

TL;DR: Investigation of the possibility of adding red mud, an alkaline leaching waste, which is obtained from bauxite during the Bayer process for alumina production, in the raw meal for the production of Portland cement clinker showed that the addition of the red mud did not negatively affect the quality of the produced cement.

TL;DR: The present study proves the effectiveness of electrochemical treatment for highly concentrated bio-refractory organic pollutants present in the industrial wastewater.

TL;DR: Investigation of the variables that influence the efficiency of decolorization of a solution containing an azo dye by electrocoagulation (EC) showed that an EC cell with several electrodes was more effective than a simple electrochemical cell in color removal.

TL;DR: The dimensionless separation factor (RL) have shown that sepiolite can be used for removal of acid red 57 from aqueous solutions and is comparable to the other available adsorbents, and it is quite cheaper.

TL;DR: CP was evaluated as a new product for removal of heavy metals from aqueous solution and results obtained show that CP is a good adsorbent for these toxic heavy metals.

TL;DR: Continuous removal of nickel(II) from electroplating effluent by LIBCS packed in fixed bed column bioreactor confirm the possibility of developing a biological treatment process for the removal of toxic metals from authentic wastewater.

TL;DR: A selection of some important, recognised, and commonly used methods for investigation of accidents is given and the selected methods are compared according to important characteristics.

TL;DR: The use of mass flux measurements (monitoring the concentration of contaminants in aqueous phase due to source zone NAPL-groundwater mass transfer) is introduced as a potential tool to assess the efficiency of technologies used in source zone remediation.

TL;DR: It was confirmed that the total concentration of heavy metals did not exceed the limits set out by European legislation and that the stabilisation treatment undergone by the sludges strongly influenced the heavy metal distribution and the phases to which they were associated.

TL;DR: An adsorbent was developed from the mature leaves of the Neem tree for removing Pb(II) from water and the computation of the parameters, DeltaH, DeltaS and DeltaG, indicated the interactions to be thermodynamically favourable.

TL;DR: The metal concentration, anions, pH value and conductivity in water eluates was determined in order to define the influence of EAF dust on the environment.

TL;DR: The adsorption of dyes in the solutions using activated sludge might be a promising approach in wastewater treatment units and the R(L) values showed that,activated sludge was favorable for the adsorptive of basic dyes.

TL;DR: A performance loss was observed as the breakthrough curves become more flattened also indicated by the broadened mass transfer zone as the ability of crab shell to remove nickel(II) ions from aqueous solution in a packed bed up-flow column.

TL;DR: For all AOPs applied to degrade Reactive Red 120 (RR120) dye in aqueous solution, it was found that degradation products in reaction mixture can be disposed safely to environment after 90 min treatment.

TL;DR: The adsorption of both heavy metal ions reached a maximum at a 5.0 value of pH, indicating endothermic nature of the Adsorption process.

TL;DR: The experimental biosorption capacity with time is found to be best fit the second-order equations and the Langmuir and the Freundlich type models were found to exhibit good fit to the experimental data.

TL;DR: Accidents caused by domino effect are among the more severe that took place in the chemical and process industry and specific probit models were derived for several categories of process equipment and were compared to other literature approaches for the prediction of probability of damage of equipment loaded by overpressure.

TL;DR: Overall water quality was found unsatisfactory for drinking purposes without any prior treatment except at eight locations out of 60, with considerable variations among the analyzed samples with respect to their chemical composition.

TL;DR: In this study, phosphate removal in excess of 99% was obtained, and it was concluded that blast furnace slag is an efficient adsorbent for the removal of phosphate from solution.