Showing papers in "Chemical Engineering Journal in 2011"

TL;DR: Carbon nanotubes (CNTs) have aroused widespread attention as a new type of adsorbents due to their outstanding ability for the removal of various inorganic and organic pollutants, and radionuclides from large volumes of wastewater as discussed by the authors.

TL;DR: Fluoride contamination in drinking water due to natural and anthropogenic activities has been recognized as one of the major problems worldwide imposing a serious threat to human health as mentioned in this paper, and it has been identified as a major problem worldwide.

TL;DR: In this article, green tea leaves (GT-Fe NPs) were used as a Fenton-like catalyst for decolorization of aqueous solutions containing methylene blue (MB) and methyl orange (MO) dyes.

TL;DR: An extensive list of various sorbents from the literature has been compiled and their adsorption capacities for nitrate removal as available in the literature are presented along with highlighting and discussing the key advancement on the preparation of novel adsorbents tested for Nitrate removal as mentioned in this paper.

TL;DR: Polymer-based nanocomposites (PNCs) have received increasing attention in both academia and industry as discussed by the authors, and they present outstanding mechanical properties and compatibility owing to their polymer matrix, the unique physical and chemical properties caused by the unusually large surface area to volume ratios and high interfacial reactivity of the nanofillers.

TL;DR: In this paper, the authors measured the properties of activated carbons (ACs) of coconut shell produced by NaOH activation at impregnation ratios of NaOH:char (w/w) equal to 1:1, 2:1 and 3:1 (AC-3) and found that AC-3 has a high surface area and showed to be an efficient adsorbent for removal of methylene blue (MB) from aqueous solutions.

TL;DR: A review of the main contributions regarding the development of new adsorbents for post-combustion CO2 capture is presented in this paper, focusing on materials evaluated at representative flue gas conditions of CO2 partial pressure (i.e., 0.05-0.2 bar) and temperature (25-75°C).

TL;DR: In this article, a unified approach for the selection of different operating and geometric parameters for large scale sonochemical reactors with a special emphasis on heterogeneous systems is presented, where the authors make recommendations for optimum selection of frequency of irradiation and power dissipation rate/irradiation intensity as well as the liquid phase physicochemical properties.

TL;DR: In this article, the adsorption characteristics of phenol from water onto zeolite were studied, i.e., kinetics, mechanism, isotherms, and thermodynamics.

TL;DR: In this article, a detailed degradation pathway has been suggested, which was based on the electrospray ionization mass spectrometry (ESI-MS) analysis, and the degradation of Rhodamine B (RhB) dye occurred via N-de-ethylation process.

TL;DR: In this paper, the adsorption of methylene blue (MB) onto activated carbon produced from flamboyant pods (Delonix regia ) and obtained under optimized conditions (AC op ) was carried out.

TL;DR: The piperazine solvent is resistant to oxidative degradation, has less volatility than MEA, and is not corrosive to stainless steel as mentioned in this paper, and can be used up to 150°C without significant thermal degradation.

TL;DR: In this paper, the adsorption of methyl orange onto multiwalled carbon nanotubes (MWCNTs) from aqueous solutions was studied, in which the influence of contact time, dosage, temperature, pH, and methyl orange concentration in the solution were investigated.

TL;DR: In this article, the authors used the Langmuir equation to predict the adsorption capacity of the biochars, with maximum predicted adaption in the ranges 0.58-1.40 and 0.48-0.79-mol/kg at pH 5.0 and 4.5, respectively.

TL;DR: In this article, a colloidal blending method was used for the preparation of TiO2/graphene oxide composites, which achieved superior adsorption and photocatalysis performance under both UV and visible radiation.

TL;DR: In this article, the adsorption of congo red onto the novel m-Cell/Fe 3 O 4 /ACCs was studied as a function of contact time, initial concentration of congon red, adsorbent dosage, and pH of solution.

TL;DR: In this paper, a mesoporous silica with amine (NH 2 ) and melamine-based dendrimer amines (MDA)-SBA-15 was used as an adsorbent for the removal of metal ions from aqueous solution.

TL;DR: In this paper, multi-walled carbon nanotubes (MWCNTs) were used for the sorption of tetracycline (TC) from aqueous solution.

TL;DR: In this paper, the poisoning effect of nano V2O5-WO3/TiO2 catalysts was investigated and the degree of poisoning effect for all the alkali metal doped catalysts is shown as follows: K> Na> Ca> Mg.

TL;DR: In this paper, the magnetic chitosan nanoparticles were prepared by a simple one-step in situ co-precipitation method and characterized by means of X-ray diffraction (XRD), transmission electron microscope (TEM), Fourier Transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM) and energy dispersive X-Ray spectrometer (EDS).

TL;DR: In this article, the potential of G in removal of hazardous chemicals in waste water, chemically reduced graphene oxide was employed as the adsorbent and the adsorption characteristics of graphene toward acrylonitrile (AN), p-toluenesulfonic acid (p-TA), 1-naphthalenesulfonyl acid (1-NA), and methyl blue (MB) were evaluated under laboratory conditions.

TL;DR: In this article, the basic theory and mechanism of microwave irradiation, current application of MW in real-time wastewater treatment, MW reactors and economical aspects of the MW in WW treatment are discussed.

TL;DR: In this article, the effects of different reaction parameters such as the initial MG concentration, contact time, solution temperature and initial pH on MG adsorption were investigated, and the mechanism of the MG adaption process was determined from the intraparticle diffusion model.

TL;DR: In this paper, physical conditioners, such as polyelectrolyte, the physical conditioner and sludge colloids may lead to the formation of a homogeneous mixture of the solids with strong and porous structure.

TL;DR: In this article, P. oceanica (L.) activated carbons (POAC) were studied by SEM and Nitrogen porosimetry and the pore structural characteristics were determined.

TL;DR: In this article, a graphene-based magnetic nanocomposite was synthesized and used as an adsorbent for the removal of a dye from aqueous solutions, which was characterized by both scanning electron microscopy and X-ray diffraction.

TL;DR: In this article, the toxicity of four varieties of oxide nanoparticles (Al 2 O 3, SiO 2, ZnO, and TiO 2 ) to the green algae Chlorella sp.

TL;DR: Magnetic and non-magnetic low cost activated carbons from almond shells were prepared, characterized, and used to remove 2,4,6-trinitrophenol (TNP) from water as discussed by the authors.

TL;DR: In this paper, the authors compared the performance of three types of adsorbents for removing methylene blue (MB) from aqueous solutions: cotton stalk (CS), sulphuric acid treated cotton stalks (SCS) and phosphoric acid-treated cotton stinger (PCS).

TL;DR: In this paper, the adsorption behavior of nickel (II) from aqueous solution onto agricultural waste such as cashew nut shell (CNS) was investigated as a function of parameters such as solution pH, CNS dose, contact time, initial nickel(II) concentration and temperature.