Showing papers in "Journal of Hazardous Materials in 2009"

TL;DR: The biodegradation of PAHs has been observed under both aerobic and anaerobic conditions and the rate can be enhanced by physical/chemical pretreatment of contaminated soil.

TL;DR: Major research efforts in the future could focus on the optimization of current technologies and use of combined physico-chemical and/or biological treatment of produced water in order to comply with reuse and discharge limits.

TL;DR: The findings revealed that various parameters, such as the initial pH of the solution to be degraded, oxidizing agents, temperature at which the catalysts must be calcined, dopant(s) content and catalyst loading exert their individual influence on the photocatalytic degradation of any dye in wastewaters.

TL;DR: Distinctive adsorption equilibria and kinetic models are of extensive use in explaining the biosorption of heavy metals, denoting the need to highlight and summarize their essential issues, which is the main purpose of this paper.

TL;DR: The prepared MMWCNT adsorbent displayed the main advantage of separation convenience compared to the present adsorption treatment and was well fitted by a pseudo second-order model.

TL;DR: The progress and developments made so far through these techniques in the visible light photocatalysis with TiO2 and ZnO are encompassed.

TL;DR: This paper provides a review on the geochemical forms, affecting factors and remediation technologies of heavy metal in sediment, especially being fit for slight pollution sediment, and suggests ex situ remediation should be the hot point in future research.

TL;DR: This paper aims to provide a review of the remediation technologies specifically for PAH-contaminated soils, and discusses solvent extraction, bioremediation, phytoremediations, chemical oxidation, photocatalytic degradation, electrokinetic remediation, thermal treatment and integrated remediated technologies.

TL;DR: The technology of application of pesticides in India is reviewed and future strategies for the rational use of pesticides and minimizing the problems related to health and environment are recommended.

TL;DR: The results indicated that the garlic peel could be an alternative for more costly adsorbents used for dye removal, and was fitted well with the Freundlich isotherm.

TL;DR: This review evaluates a number of different agricultural waste adsorbents and types of dyes to determine whether low cost adsorbent derived from agricultural wastes can be viable alternatives to activated carbon for the treatment of contaminated wastewater.

TL;DR: The adsorption characteristics of 2,4,6-trichlorophenol on activated carbon prepared from oil palm empty fruit bunch (EFB) were evaluated and Boyd plot revealed that the advertisersorption of TCP on the activated carbon was mainly governed by particle diffusion.

TL;DR: Thermodynamics analysis suggested that lead adsorption onto the biochars was physical endothermic process, implying that lead removal from aqueous solution was an endotheractic process.

TL;DR: Nano-sized zero-valent iron was supported onto activated carbon (NZVI/AC) by impregnating carbon with ferrous sulfate followed by chemical reduction with NaBH(4) and ferrous iron (Fe(2+)) was found to suppress arsenite adsorption.

TL;DR: Addition of calcium compounds as a fly ash substitute improved mechanical properties for the ambient temperature cured samples while decreasing Properties for the 70 degrees C cured samples.

TL;DR: All materials preserve the mesoscopic order and exhibit suitable textural properties and nitrogen contents to act as potential adsorbents and copper adsorption rates show that the overall process is fast and the time evolution can be successfully reproduced with a pseudo-second-order kinetic model.

TL;DR: This paper briefly reviews the literature work reported on the environmentally compatible green energetic materials (GEMs) for defence and space applications and briefs the principles of green chemistry pertaining to HEMs.

TL;DR: EDX analysis of MPW before and after metal sorption and release of cations from MPW with the corresponding uptake of Cd(2+) and Pb(2+) revealed that the main mechanism of sorption was ion exchange.

TL;DR: The amino-functionalized magnetic nano-adsorbent shows a quite good capability for the rapid and efficient adsorption of metal cations and anions from aqueous solutions via the chelation or ion exchange mechanisms.

TL;DR: It was observed that the rate of dye adsorption follows pseudo-second-order model for the dye concentration range studied in the present case and the estimated values of DeltaH0 and DeltaS0 both show the negative sign, which indicate that the Adsorption process is exothermic and the dye molecules are organized on the kaolin surface in less randomly fashion than in solution.

TL;DR: In this paper, the capability of poly-aluminum chloride (PAC) in the treatment of stabilized leachate from Pulau Burung Landfill Site (PBLS), Penang, Malaysia was studied.

TL;DR: The mechanism and advances in the use of biological treatment for the removal of cyanide compounds and its advantages over other treatment processes are described, which also includes various microbial pathways for their removal.

TL;DR: Batch experiments suggest that the decolorization efficiency was enhanced with the increase of NZVI dosage and reaction temperature, but decreased with increasing initial dye concentration and initial solution pH, and studies indicated that existence of inorganic salt could inhibit thedecolorization of MO.

TL;DR: Kinetic studies showed that the kinetic data were well described by the pseudo-second-order kinetic model and significant increases in initial adsorption rate were observed with the increase in temperature followed by pH and initial MB concentration.

TL;DR: The biomass used in this work proved to be effective materials for the treatment of chromium bearing aqueous solutions and the pseudo-first-order kinetic model adequately describe the kinetic data in comparison to second-order model.

TL;DR: A state of art review of leachate treatment technologies, its fundamental background studies, and environmental implications confirms that the expanding of activated carbons adsorption represents a potentially viable and powerful tool, leading to the superior improvement of environmental conservation.

TL;DR: Performance of Dowex HCR S/S cation exchange resin was evaluated for removal of nickel and zinc from aqueous solutions and it was determined that removal of Ni (2+) and Zn(2+) was well-fitted by second-order reaction kinetic.

TL;DR: Based on circular economy concept in China and complete recycling and resource utilization for all materials, a new environmental-friendly integrated recycling process with no pollution and high efficiency for waste PCBs was provided and discussed in detail.

TL;DR: A three factor, three-level Box-Behnken experimental design combining with response surface modeling (RSM) and quadratic programming (QP) was employed for maximizing Pb(II) removal from aqueous solution by Antep pistachio (Pistacia vera L.) shells based on 17 different experimental data obtained in a lab-scale batch study.

TL;DR: The results showed that the adsorption of direct blue dye was maximal at pH 2, as the amount of adsorbent increased, the percentage of dye removal increased accordingly but it decreased with the increase in initial dye concentration and solution temperature.