Showing papers in "Separation and Purification Technology in 2006"

TL;DR: In this paper, the authors investigate the permeability characteristics of ions present in the aerobic rotational membrane system (ARMS) effluent through a nanofiltration membrane and evaluate the effectiveness of nan-filtration process to remove dissolved solids.

TL;DR: In this paper, the effect of contact time, solution pH, ionic medium and initial metal concentration were studied in batch experiments at room temperature, and the results showed that olive stone waste, which has a very low economical value, may be used for the treatment of wastewaters contaminated with heavy metals.

TL;DR: The ability of the alum-impregnated activated alumina (AIAA) for removal of fluoride from water through adsorption has been investigated in this article, where all the experiments are carried out by batch mode.

TL;DR: In this article, the adsorption characteristics of P-adsorption on the dewatered alum sludge were identified as a function of pH and ion strengths in solution.

TL;DR: In this article, the adsorption of the toxic metal ions onto tannic acid immobilised activated carbon was investigated depending on pH, contact time, carbon dosage, adaption capacity and adsor-ption isotherms by employing batch adsorsorption technique.

TL;DR: In this paper, the removal of Cu(II) ions from an aqueous solution by kaolinite, montmorillonite, and their poly(oxo zirconium) and tetrabutylammonium derivatives was investigated.

TL;DR: In this article, a 10 l photobioreactor integrated with a hollow fiber membrane module was constructed to remove CO 2 from air by using the photosynthetic microalga, Chlorella vulgaris.

TL;DR: In this article, the effects of the surface charge and molecular weight of anionic and cationic polyacrylamide (PAM) on the surface chemistry, settling rates, floc sizes and sediment bed compactness of kaolinite suspensions has been investigated at pH 7.

TL;DR: In this paper, the total phenolic contents of five citrus peels (Yen Ben lemon, Meyer lemon, grapefruit, mandarin and orange) extracted by enzyme-assisted aqueous extraction were evaluated using the Folin-Ciocalteu assay.

TL;DR: In this paper, the effects of pH, contact time, biosorbent and lead(II) concentrations and temperature on biosorption were investigated and the nature of the possible cell and metal ion interactions was examined by the FTIR technique.

TL;DR: In this article, the influence of activated sludge properties such as the mixed liquid of suspended solids (MLSS) concentration, sludge particle size distribution (PSD), extracellular polymeric substances (EPS), soluble microbial products (SMP), dynamic viscosity (μ), relative hydrophobicity (RH), and zeta potential on membrane fouling was examined.

TL;DR: In this paper, a solvent extraction method utilizing 50% ethanol and 50% water as solvent was used for the extraction of polyphenols from grape seeds, and an additional ultrafiltlration step was also included to determine its beneficial effect.

TL;DR: In this article, the effects of pH, adsorbent dosage and contact time on the adsorption of activated red mud were investigated, and it was found that sufficient time for adorption equilibrium of nitrate ions is 60 min.

TL;DR: In this paper, an attempt has been made to remove chemical oxygen demand (COD) from olive mill wastewaters (OMW) as well as oil-grease and turbidity in the presence of H 2 O 2 and polialuminum chloride (PAC), as a coagulant-aid by an electrochemical method using either iron or aluminum as sacrificial electrodes.

TL;DR: In this article, the effects of initial phosphate concentrations and current densities on the phosphate removal by electrocoagulation using either aluminum or iron plate as electrodes were investigated, and it was found that removal rate and removal efficiency have increased by increasing current density.

TL;DR: In this article, the adsorption characteristics of hexavalent chromium were studied with an adsorbent developed from waste tamarind hull, which was found to follow a pseudo-first-order rate mechanism and the rate constant was evaluated at 30 ÂC.

TL;DR: In this article, the removal efficiency of carbon dioxide from gases containing 10% CO2 by the aqueous solutions containing piperazine (PZ) and its mixture with monoethanolamine (MEA), 2-amino-2-methyl-1-propanol (AMP), and methyldiethanolamine (MDEA) in a rotating packed bed was investigated.

TL;DR: In this paper, two coagulants (alum and an aluminium pre-polymerised coagULant of high basicity (WAC)) and the most relevant operating conditions (velocity gradients for coagulation and flocculation, retention time and DAF pressurised recycle ratio) were investigated for two scenarios of influent cell concentration, expressed as chlorophyll a.

TL;DR: In this article, the effect of surface properties on the adsorption behavior of palygorskites was investigated by means of X-ray diffraction and Fourier transform-infrared (FT-IR) for removing phosphate ions from aqueous solution.

TL;DR: Gemazol Turquise Blue-G, a vinyl sulfone mono-azo type reactive dye, containing copper-phtlalocyanine as cromofor group, was removed from its aqueous solution in batch and continuous packed bed sorption systems by using dried rhizopus arrhizus as a biosorbent Operating variables studied were temperature, initial pH, initial dye concentration and sorbent dosage in the batch stirred system and flow rate and inlet dye concentration in the continuous packed-bed as mentioned in this paper.

TL;DR: In this article, the potential of a cheap lignocellulosic fiber, coir was assessed for removal of heavy metal ions like Ni(II), Zn(II) and Fe(II).

TL;DR: In this article, the authors measured the amount of oil to be sorbed onto the adsorbents used in this study using both static and dynamic methods, and the results obtained were correlated with the first order, second order and intra-particle diffusion models.

TL;DR: The suitability of the Langmuir, Freundlich and Redlich-Peterson adsorption models to the equilibrium data was investigated for the mercury-biosorbent system in this article.

TL;DR: The coal-based microfiltration carbon membrane with low cost for the treatment of oily wastewater was prepared by carbonization of tubular carbonaceous precursor obtained by extrusion method as discussed by the authors.

TL;DR: In this article, the adsorption characteristics of dyes by anaerobic sludge were investigated and the effect of dye type, sorption time, initial dye concentration, sludge concentration and temperature on dye biosorption was evaluated.

TL;DR: In this paper, the authors investigated the viability of ULPRO and NF membranes as potential techniques to treat produced water by meeting water quality standards and concentrating iodide in the brine.

TL;DR: In this article, simultaneous biosorption of phenol and chromium (VI) ions to Mowital®B30H resin immobilized activated sludge from binary mixture was studied and compared with single phenol or chromium(VI) biosorptions in a continuous packed bed column.

TL;DR: In this paper, the effect of powder activated carbon (PAC) dosage on membrane fouling for domestic wastewater treatment at PAC dosage of 0, 0.75 and 1.5 g/L was investigated.