Advanced Materials Research Vols. 750-752

Abstract: Lead ions were coupled to protein carrier bovine serum albumin (BSA) and keyhole limpet hemocyanin (KLH) respectively. Diethylene Triamine Pentacetate Acid (DTPA) was used as bifunctional chelator. Pb-DTPA-Carrier protein, DTPA-Carrier protein and carrier protein were detected qualitatively with ICP-MS, UV spectrophotometer and electrophoresis. It turns out that the Pb-DTPA-Carrier protein contains certain concentration of heavy metal ion, the maximum ultraviolet absorption peak value of Pb-DTPA-Carrier protein significantly higher than that of DTPA-Carrier protein and carrier protein, and the electrophoresis reveals more vague bands of Pb-DTPA-Carrier protein with slower migrations speed comparing to the bands of the DTPA-Carrier protein and carrier protein. The result indicated that the artificial antigen for lead was successfully synthesized.

Abstract: Aquasorb was prepared with naked oats straw and acrylic acid by graft copolymerization. Adopting orthogonal optimization design to determine the optimal levels of each factor of synthesis conditions, and carried on the various performance was detected. When prepared under the conditions that reaction temperature 70 °C, monomer concentration 12%, the dosage of initiator 1.50%, the amount of cross linking agent 0.15%, neutralization degree 80%, reaction time 3 h, monomer and straw mass ratio 10:1, rotate speed 600 r/min, the water absorbency of the aquasorb was 1012 g/g in deionized water, and 120 g/g in 0.9% NaCl solution. The aquasorb prepared under this condition expressed excellent salt resistance, water holding capacity, acid and alkali resistance.

Abstract: A novel superabsorbent resin (SAR) which was called wheat straw cellulose-g-poly (potassium acrylate)/poly-diallyl dimethyl ammonium-chloride (WSC-g-PKA/PDMDAAC) semi-interpenetrating polymer networks (semi-IPNs) amphoteric SAR was synthetized by graft polymerization and semi-interpenetrating technology with the present of initiator and crosslinker. The effects of AA, PDMDAAC and crosslinker content on water absorbency of semi-IPNs SAR were studied. The semi-IPNs SAR prepared under optimized synthesis condition gave the best water absorption of 210.57 g/g in distilled water and 22.13 g/g in 0.9 wt% NaCl solution. In addition, the results showed that high water absorbency appeared from pH 4 to 9, and the effect of the salt ions in the swelling capacity was Al³⁺ > Ca²⁺ > Mg²⁺ > K⁺ > Na⁺.

Abstract: The research treated the cotton fabric with nano-TiO2 and activated carbon.The four factors of the dispersion concentration, the activated carbon content, baking temperature and time were selected to be the variables .Then it used the self-made equipment to test the performance of absorption formaldehyde. The single factor affection experiment and orthogonal test were carried out to explore the four factors .The result showed that as these factors increase, to different degrees, the rate of fabric's adsorption and degradation formaldehyde also increase . It provides a theoretical guidance for the development of adsorption photocatalysis cotton decorative fabric in the textile sector.

Abstract: In this study, removal of Methyl Red from aqueous solutions by synthetic Mg-Al-HTlc was investigated as a function of contact time, pH and temperature. It is found that HTlc could reduced Methyl Red concentration effectively. The kinetic process which reached equilibrium at about 2h can be fitted by pseudo-second order kinetics. The percent removal of MR by the HTlc was dependent on the initial pH of bulk solution. There was no much changes in amount of adsorption in the initial pH range of 6-8, while it reached maxium at about of 9. The adsorption process was endothermic.

Abstract: The biomass of rice straw was chosen to prepare the biomass semi-cokes which are characterized by nitrogen adsorption/desorption and Fourier transformation infrared spectroscopy (FT-IR). The influence of biomass semi-cokes activity on pore structure and surface properties of the semi-cokes was investigated. Denitration and mercury removal experiments were carried out in a fixed-bed reactor. The results show that the active biomass semi-cokes have more specific surface area and micro-pore volume than the biomass semi-cokes. It has direct relationship between the NO and mercury adsorption capacity. It is supposed that oxygen-containing functional and basic groups may have dominant effect on the mercury removal from the glue gas.

Abstract: The feasibility of coking waste water treatment by three-dimensional electrode was studied in the experiment. The reactor is comprised of a conventional two-dimensional electrode filled with high carbon-bearing metallized pellets which is also called the third electrode. The results show that there is a dramatic decrease in the content of COD, phenol and cyanide by this treatment. Also the color of coking wastewater after being treated is compared with original sample.

Abstract: Nickel (Ni) is an essential element for plants but it is toxic at large concentrations. In the present study, bioassays of bok choy were taken in 17 Chinese soils with different properties and climate characteristics to evaluate the toxicity of soil soluble nickel (Ni) toxicity in soil pore water to bok choy. The tested soils were spiked with 8 levels of soluble Ni chloride with or without leaching treatments. The effective soluble Ni concentrations that caused 10% root growth inhibition (EC10) and 50% inhibition (EC50) varied widely from 0.05 to 2.1 mg/L and from 0.13 to 7.6 mg/L in 17 unleached soils, represented 41.8 to 58.5 folds differences, and from 0.08 to 2.2 mg/L and from 0.47 to 4.5 mg/L in leached soils, represented 27 to 9.6 folds differences. It indicated that the soil soluble properties greatly influenced Ni toxicity to bok choy. However, soluble Ni toxicity thresholds were not significantly decreased in 15 soils. Regression models between soil solution properties and phytotoxicity threshold values were developed. The model showed that soil solution Mg²⁺K⁺ and electrical conductivity (EC) were the important factors affecting Ni toxicity on bok choy, and meanwhile they were positively related to the toxicity thresholds. These quantitative relationships could be used for the risk assessment of Ni in terrestrial environment in China.

Abstract: A new polymer of epichlorohydrin-ethylenediamine was obtained by suspension polycondensation of ethylenediamine with epichlorohydrin. The color removal performance and mechanism of the polymer in the treatment of synthetic reactive dyes wastewater was investigated, and in comparison with polymeric aluminum ferric chloride (PAFC) and polydimethyldiallylammonium chloride (PDMDAAC). The results showed that epichlorohydrin-ethylenediamine achieved higher color removal efficiency, and its adsorption-bridging and electric neutralization ability playedimportant roles in the flocculation process.

Abstract: An effective adsorbent for the removal of arsenate from aqueous system was synthesized by loading ferrihydrite on attapulgite (ATP). The effects of various parameters such as heat modified temperature and particle size of ATP, Fe (III) concentrations, adsorbent dosage, solution pH on the removal rate of arsenate were assessed. The results showed that 600 °C modified ATP loaded with Fe (III) sorbent had better arsenate removal efficiency than 200 °C and 400 °C modified ATP. The removal efficiency of As (V) increased significantly with decreasing the particle size of ATP. Arsenate was effectively adsorbed by ATP loaded with Fe (III) sorbent in the pH range of 57. Equilibrium data of arsenic adsorption fitted perfect with Langmuir isotherm model. The removal rate of As (V) by ATP loaded with Fe (III) sorbent was 95.8% at the optimal conditions from drinking water. The results showed that ATP loaded with Fe (III) sorbent can be used for the arsenate removal from aqueous system.