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Polymer free calix[4]arene nanofibers were prepared via new electrospinning method with metal ion adsorption capacity. Two different calix[4]arene derivatives (compound 2 and 3) containing amide functionalities were used in this study, which were fully characterized by HNMR, FTIR and elemental analysis. Calix[4]arene nanofibers were analyzed with different surface characterization techniques such...
Innovative semiconductor materials, solid substitution solutions CdSxTe1−x with different composition were produced with the help of improved isothermal diffusion. Bulk and surface physicochemical properties — X-ray, electron-microscopic, UV-spectroscopical, acid-base, and adsorptive ones — were studied. Interrelated regularities “property — composition” were devised. Predictions about the surface...
Batch adsorption equilibrium of the sulfur compounds from diesel oil using two types of commercial activated carbon was studied in a two-level factorial experimental design method. This technique has been used to investigate the impacts of several factors controlling the adsorption process, such as source of sorbent material, amount of sorbent material used, and temperature. High percentages of adsorption...
Quinoline and their derivatives extracted from biodiesel are often used for designing of many synthetic compounds with diverse pharmacological and medicinal proprieties. These kinds of compounds have a wide variety of applications in many fields. They serve as intermediates in certain enzymatic reactions and their use as environmentally safe corrosion inhibitors reveal their importance. The aim of...
Hydrotalcite (HT) or hydrotalcite-like compounds (HTlc) are layered double hydroxides belonging to the class of anionic clays. The structure of these compounds are very similar to that of brucite, Mg(OH)2, where some of Mg2+ represented as [M(II)] are isomorphously replaced by Al3+ represented as [M(III)] and the net positive charge is compensated by the inter-layered exchangeable anion (An−).
An innovative approach of sensitive and selective detection of trace amounts of chemical threat agents is presented in this work. The technology deals with semiconductor metal oxide gas sensors as a means of express gas detection, coupled with pre-sampling system, which is to improve sensitivity and selectivity of analysis. Examples for H2S, DMMP (phosphor-organic weapons simulant) and UDMH (highly...
Chitosan resin grafted by quercetin (QCR), the adsorbent, was used as for the separation of flavonoids. The optimum conditions were determined by automatic liquid chromatography system. Moreover, the hydrophobic interaction between the flavonoids and QCR could be useful for the effective adsorption and separation.
A scoping investigation was carried out to evaluate the occurrence, persistence and fate of a range of pharmaceuticals and personal care products (PPCPs) at different processing points at three full-scale sewage treatment plants (STPs) at Guangdong, South China. The concentrations of 7 pharmaceuticals from non-steroidal anti-inflammatory analgesics and antihyperlipidemics were examined in each treatment...
Adsorption of molasses effluent by activated carbon (AC) was investigated in this study. The effect of AC type on decolorization rates was compared and influential factors such absorbent doses, initial pH, adsorption time and temperature were evaluated. The results shows that the decolorization capacity is in the order of powered activated carbon (PAC) > granular activated carbon (GAC) > cylindrical...
This paper is study on the adsorption performance of chitosan for copper ions in conditions of different amounts of chitosan, different times, different temperatures and different pH. The results show that the best adsorption conditions is chitosan concentration of 6.4 ∼ 8.0g/L; adsorption time of 10min; adsorption temperature of 38°C; pH=6. The kinetic equation of chitosan adsorption for copper ion...
To explore treatment of phenol wastewater, carbonate pillared Mg/Al hydrotalcites and four kinds of modified Mg/Al hydrotalcites with different concentration of SDBS were synthesized by coprecipitation method and characterized by XRD and FTIR respectively. Then the five kinds of Mg/Al hydrotalcites were used as adsorbent to adsorb phenol in solution, in the meantime the adsorption mechanism and influencing...
Abundant of estrogens is excreted via human urine, bringing the risk of micro-pollution during nutrients recovery from urine. This study investigated the characteristics of estrogens during the ammonification of urine, and then experiments were conducted to study the adsorption of estrogens on struvite, a potential product to recover nutrients from urine. The results showed that no 17a ethinylestradiol...
2-methylisoborneol (MIB) and geosmin cannot readily be removed by conventional water treatments. Ozonation biological activated carbon (O3-BAC) process is an attractive option for MIB and geosmin removal. For MIB and geosmin with an initial concentration of 500 ng/L, the removal efficiencies of MIB (geosmin) by ozonation, biodegradation and activated carbon adsorption were 51% (73%), 19% (17%) and...
The adsorption of thiophene from thiophene-octane mixture has been investigated using organic-montmorillonite under proper conditions. The adsorbents were prepared by a xerogel process, followed by thermo - treatment. The adsorptive experiments show that C-P-MMT adsorbent has the higher capacity, 3.8mg/g (mg of sulfur per g of adsorbent). BET, XRD, NMR were used to characterize the adsorbents. It...
The ability of Mg-Fe layered double hydroxide to remove C. I. Reactive Red 2 from aqueous solution was investigated. The influence of molar ratio of Mg-Fe, solution pH, contact time and initial dye concentration on adsorption capacity of C. I. Reactive Red 2 was studied. Batch isotherm studies were carried out on a laboratory scale to evaluate the adsorption capacity of Mg-Fe layered double hydroxide...
Based on the strong affinities of Fe(III) and Al(III) to fluoride, four iron- aluminum hydroxide complexes were synthesized as adsorbents for the fluoride removal. Moreover, the adsorption experiments showed that all iron-aluminum complexes could adsorb aqueous fluoride effectively and with a high capacity. When an fluoride solution of 10 mg/L−1 was added with anyone of these complexes at pH 5.0–9...
Unsupported Ni-Mo composite oxide catalysts were successfully prepared by the sol-gel method with citric acid as a complex agent. The catalysts were characterized using N2 adsorption-desorption, X-ray diffraction (XRD) and temperature programmed desorption (NH3-TPD). The effects of Mo/Ni molar ratio and reaction temperature on the hydrodeoxygenation activity of the catalysts were investigated emphatically...
Soil samples in different depths we recollected from Tiebutie pool in Daqing, which was used to take up waste water from a petrochemical plant for about 30 years. The distribution and concentration of polycyclic aromatic hydrocarbons(PAHs) in organo-mineral aggregates were analyzed. Results show that the concentration of low molecular PAHs is the highest in all fractions, and the concentration of...
Glyphosate is the herbicide widely used in China. However, little is known on the processes governing the environmental fate of glyphosate in soils and its environmental risk for groundwater. Laboratory experiments were performed to evaluate the degradation, adsorption, and leaching behavior of glyphosate in three agricultural soils with high sand content and different soil organic carbon content...
We have developed a method using a scanning tunneling microscope (STM) probe tip to control the chain polymerization of diacetylene compounds in a self-ordered layer, thereby creating conjugated polydiacetylene nanowires. When a small amount of phthalocyanine was deposited on a molecular layer of diacetylene compound, we found adsorbed and stabilized phthalocyanine single molecules. The initiation...
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