Advanced Materials Research Vols. 712-715

Abstract: Bamboo paper sludge is a kind of industrial solid wastes and it is difficult to deal with it. In this study, the spectrum of bamboo paper sludge and the relationship between sludge with two different adhesives were investigated. Besides, the contents of C, H, O, N, S were measured by elemental analysis instrument of Vario Ⅲ. The results showed that: bamboo paper sludge FTIR spectrum was composed of five regions; kaolin and benzene derivatives were contained in sludge. UF was covered the surface of sludge forming a thick glue line and spectra was covered. But, the phenomenon did not appear in PF. The content of C, H, O, N, S in bamboo paper sludge was 35.68%, 6.4%, 18.48%, 3.27%, 1.21% respectively.

Abstract: Factors affecting reactive dyeing in the laboratory by 1:4 bath ratio was analyzed, such as dyes behaviors, dye bath circulation, dyeing conditions. Dyeing in the laboratory was carried out respectively with deep-color RW and light-color RW dyes by 1:4 bath ratio. By measuring levelness and K/S value of the dyes and color fastness.

Abstract: Groundwater quality assessment had important guiding significance on sustainable use of groundwater resources. In order to avoid the subjective judgment on the weight of each index, this article used the Vague set entropy theory to determine the weight of each index, combined with the TOPSIS method, it established the TOPSIS groundwater quality evaluation model based on Vague set entroy. Finally, this model was applied to groundwater quality evaluation in Tailan River Irrigation District, the evaluation results matched with the actual situation. The results showed that the evaluation process of this model was reasonable and scientific, it provided a new idea for groundwater quality assessment.

Abstract: In this paper, concentrations and spatial distribution of four heavy metals (Cu, Pb, Zn, As) in cropland soil from suburb area of Suzhou city were determined and analysed by X-Ray fluorescence spectrometer and interpolation analysis. Then based on integrated pollution index (IPI), pollution levels of the heavy metals were assessed. The results indicate that the mean concentrations of As was higher than the value of Anhui soil background, while the others were lower; Spatial distribution of Pb and Zn were affected by traffic pollution, Cu was related with the emissions of garbage and waste, As was came from the use of pesticides; The IPI of heavy metals belonged to light pollution levels, and As was higher than the others.

Abstract: In this paper, As pollution in the vegetable planting soil of Suzhou city was measured, analysed and evaluated by X-ray fluorescence spectrometry and enrichment factor method. The results show that: As content in the vegetable planting soil of Suzhou city ranged from 5 to 20mg/kg, with an average of 510.51mg/kg; Form spatial distribution, there were a lot of differences between the different vegetable planting areas; The enrichment factor indexes showed that As content in vegetable planting soil was non-polluting or weak pollution level. however, there are certain risks to the environment quality because of As cumulative trend.

Abstract: Heavy metal concentration in the roadside soil collected from the four directions was determined by X-Ray Fluorescence Spectroscope. The results indicated that the average copper concentration is higher than the soil background value of Anhui province and Cu was highly enriched and accumulated; the order of copper concentration from high to low is: Commercial areas > Areas around station > Industrial areas > Residential areas >Urban green space; the pollution assessment results of Geo-accumulation index showed that some samples((19, 23 ,26 and 29) is less moderate pollution or moderate pollution, , and the others are light pollution or unpolluted.

Abstract: River sediment is a basic composition part of water environment, the heavy metal content of which is usually taken as one of the important index for the water environment quality. Taking the water quality and sediment of the Tuo River in Suzhou in this article as the main research objects, the research on pollution of heavy metals was carried out. Along the river, it is divided into S, U, F, D, O five blocks from upstream to downstream, and each area was arranged 6 to 11 sampling points unequally. The content of heavy metals (P, Hg, Al, Fe, V, Cr, Co, Zn, and Cu) which existed in the water and sediment were tested and analyzed. Moreover, heavy metal pollution of Tuo river sediment was evaluated by the methods of Geoaccumulation index and Potential ecological risk assessment.

Abstract: Nitinol is metal alloy of nickel and titanium. It has wide range of applications. The most significant application is production of self-expanding stent-grafts, which are commonly used in vascular surgery. Stent-graft manufactures are confronted with two basic requirements: stents must have an infinite life; stents must be made of the thinnest wires us possible. Stent-graft failure or device fatigue remains major concern for stent-graft manufactures and researches. The stent-grafts are mechanically loaded, and also the device is placed in very aggressive environment. The corrosion stability of Nitinol is strongly dependent on the surface preparation: grinding, polishing, chemical etching. The paper deals with fatigue degradation of stent-grafts in corrosive environment.

Abstract: In this paper, the effect of residual chlorine of hypochlorite (H) on high yield pulping with H₂O₂/CoSO₄ of wet stored bagasse was studied. Compared with control sample, the pulp of the bagasse wetstored with H or Ho (without residual chlorine) bleaching waste water had better pulping yield and the pulp optical property was lost seriously, but the pulp return yellow performance was control. If it had no requirement on the brightness or the pulp must be kept at the condition easy to return yellow, the wet storage with H or Ho bleaching waste water was a good method to improve the pulping yield, control the change of brightness and save clean water.

Abstract: A middle grade siliceous phosphorite from Yunnan province was selected to treat Cd²⁺ bearing aqueous solutions. The siliceous phosphorite was tested by X-ray fluorescence spectrometer, X-ray diffraction, infrared spectrometer and scanning electron microscopy. The results present that the valuable mineral is nanostructured carbonated fluorapatite and the major gangue mineral is quartz. The amount of Cd²⁺ sorbed by the siliceous phosphorite tends to increase with the increase of initial pH or the initial Cd²⁺ concentration of the simulated waste water. The reaction process of Cd²⁺ removal from aqueous solutions is highly fitted with the pseudo-second order kinetic model. The results indicate that nanostructured carbonated fluorapatite bearing siliceous phosphorite can effectively immobilize aqueous Cd²⁺.