Advanced Materials Research Vol. 803

Abstract: A hydroxamate collector AM28 is used in conjunction with Potassium Amyl Xanthate (PAX) to allow the flotation of the low-grade copper oxide ores from DongChuan Mine. A series of batch laboratory scale flotation tests are conducted for oxide copper minerals to establish the flotation response and the suitability of the collectors. From the rougher flotation tests performed, the highest copper recovery obtained is 78.9% at a concentrate grade of 2.5% using AM28 dosage of 740g/t and PAX dosage of 20g/t. With one stage of cleaning, the obtained copper grade increases to 9.6% with the copper recovery at 64.9%.

Abstract: A series of compounds were applied as plasticizer in the cellulose acetate filter of cigarette. The data showed that the tested filters with proper plasticizers could effectively remove phenolic compounds from mainstream cigarette smoke. In the test models, Triethyl citrate (TEC) exhibited significant absorption capacity to phenolic compounds in cigarette smoke, and the removal efficiency exceeded 49% in contrast to triacetin. Similar result was obtained in different type of cigarette with TEC tips. The removal efficiency of phenolic compounds was significantly affected by the loading of TEC when the loading of TEC was less than 9 wt%. However, when the loading of TEC was between 9-15 wt%, the removal efficiency showed only slight difference.

Abstract: In order to obtain the mixed isobutylamine /cyclopentylamine platinum complexes with chloride and oxalic acid ions as leaving groups. The title compounds were synthetised from potassiumtetrachloroplatinate(II) by the reaction with potassium iodide, cyclopentylamine, isobutylamine, silver nitrate, potassium chloride, potassium oxalate monohydrate. The complexes structure and component were characterized by elemental analysis, ESI-MS, 1H-NMR and IR and the anticancer activity were measured by MTT method. The results showed that its structure was consistent with the title compound and had inhibiting effect on the growth of tumor cell lines in vitro.

Abstract: As an important solvent, tetrahydrofuran has broad applications. Due to its process of production, water will be mixed into the product and should be removed. However, tetrahydrofuran will form a minimum boiling azeotrope with water, which has a boiling point of 63.4°C, so general distillation can not separate them. Common methods to solve this include extractive distillation, pressure swing distillation, azeotropic distillation, pervaporation and so on. In this experiment, we coupled extractive distillation and general distillation, selecting ethylene glycol as the extractant, and successfully dehydrated the azeotrope. The mass fraction of water is reduced from 18% to less than 500ppm,which matches the requirement.

Abstract: Using 1-methyl-3-alkylcarboxylic acid imidazolium chloride ([CMMICl) ionic liquid (IL) as synthetic environment, CMMIm-PANI and CMMIm-PANI@ATP composites were successfully prepared via in situ chemical oxidation polymerization. The chemical characterization of the material before and after ATP adding was performed by means of Fourier transform infrared spectroscopy (FTIR). The morphology of the coatings was observed employing scanning electron microscopy (SEM). The results are further indicated that PANI which coated on the surface of rodlike crystal ATP helped the formation of conductive path among ATP crystals which overlapped each other. The four probe conductivity apparatus was used to analyze the electronic properties of the composites. The conductivity of CMMIm-PANI@ATP and CMMIm-PANI are 10 S/cm and 1.8 S/cm respectively, which clearly showed that the introduction of ATP in composite makes the conductivity increased largely. In addition, thermogravimetric analysis shows that the thermal stability of CMMIm-PANI/ATP composites was enhanced and these can be attributed to the effect of coated ATP as barriers for the degradation of PANI.

Abstract: The composite weakly basic resin (D301Fe) was prepared and examined using scanning electron microscopy and Fourier transform infrared spectroscopy. The adsorption kinetics of glyphosate from aqueous solution onto composite weakly basic resin (D301Fe) were investigated under different conditions. The experimental data was analyzed using various adsorption kinetic models like pseudo-first order, the pseudo-second order, the Elovich and the parabolic diffusion models to determine the best-fit equation for the adsorption of glyphosate onto D301Fe. The results show that the pseudo-second order equation fitted the experimental data well and its adsorption was chemisorption-controlled.

Abstract: This study explores a bibliometric approach to quantitatively assessing current research trends on sludge, by using the related literature published between 2000 and 2011. The articles acquired from such literature were concentrated on the general analysis by publication type and language, characteristics of articles outputs, country, subject categories and the frequency of title-words used. Over the past 12 years, there had been a notable growth trend in publication outputs, along with more participation of countries/territories. An analysis of the title-words showed that wastewater treatment was still the most hot topic in sludge research and wastewater, heavy metal, waste water treatment and anaerobic digestion were recent major topics of sludge research. Besides, membrane bioreactor technology has been advancing rapidly around the world and became an ideal way to reduce sludge production in the wastewater treatment process.

Abstract: This paper presents a detailed chronological survey of paper published in the journal titled Advanced Materials Research from 2005 to 2012. An analysis of the research performance according to publication output, country, institute, classification code and controlled vocabulary used. Results showed that China published about 85% of total publications, and School Of Mechanical Engineering And Automation, Northeastern University was the most productive institute. In addition, results also showed that manufacture, building materials, design, civil engineering and construction equipment were the most frequently used controlled vocabularies

Abstract: An industrial waste containing large amounts of arsenic (76.90wt %) was studied, which originated from a tin refining process. The As leachability in the waste determined with solid waste-extraction procedure for leaching toxicity horizontal vibration method (GB 5085.3) and the concentration of As in the leachate was 13.10 g/L after 16h of the leaching. The waste was treated using precipitation technology with lime. Addition of lime appeared to effectively reduce the concentration of arsenic in the leachate through the formation of a slightly soluble calcium-arsenic compound. Moreover, it is shown that the optimal amount of added CaO is 5 g per 10 g of waste, and the right pH environment should be over 12.00.

Abstract: In this paper, the solubility of barium nitrate prepared from barium chromate and nitric acid was investigated. The effects of reaction time, reaction temperature, stirring rate, the concentration of nitric acid and the amount of the initial content of barium chromate have been studied. The results showed that the solubility of barium nitrate decreased with increasing reaction time, stirring rate and concentration of nitric acid, increased with reaction temperature but had nothing to do with the amount of the initial content of barium chromate. Finally, the reaction optimum conditions were determined that the reaction time was kept at 30 min, reaction temperature was 40-50 °C, stirring rate was 100-200 rpm, and the concentration of nitric acid was 15 mol/L.