Advanced Materials Research Vols. 113-116

Abstract: Experiments were done on poisoning pine moth of Pinus tabulaeformis plantation with mixed liquid of wooden vinegar and the extract liquid of Chelidonium majus, Polygounum aviculare, Urtica angustofolia, Euphobia fischeriana, and Angelia dahurica in Suizhong County of Liaoning Province. The results showed that it could prevent and kill larva of pine moth of Pinus tabulaeformis quite well by using 20 times liquid of Urtica angustofolia, and the highest rate of mortality was 100%.

Abstract: To achieve better activity, TiO2 was modified through surface fluorination using hydrofluoric acid (denoted as HF-TiO2). The photocatalytic activities of the as-prepared HF-TiO2 and pure TiO2 photocatalysts were evaluated for selective aerobic oxidation of benzyl alcohol. Experimental results indicated that without any loss of selectivity (>98%), distinct rate enhancement can be observed on HF-TiO2 comparing to pure TiO2. To optimize the condition of pretreatment, different concentrations of hydrofluoric acid were also used and the optimal concentration was determined to be 2%. Moreover, the dynamics of benzyl alcohol oxidation followed pseudo-first-order kinetic. By ESR technique and experiments adding different captures, the active specie is determined to be O2 while O2.- and H2O2 were byproducts of the reaction. In a word, this study opens a new path to obtain both high selectivity and conversion yield by TiO2 photocatalysis.

Abstract: Untreated disposal of coal mine wastewaters from Shanbei loess have environmental and public health concerns in the developing Shanbei Loess Plateau, Northwest China. An in-situ experiment was conducted in the easily accessible loess to study their efficiency in removal of pollutants. Approximately 565L of wastewater was used in the test, which lasted 333min. Loess samples were collected at 5 discrete depths, 0.2m, 0.4m, 0.6m, 1m, and 1.5m from the surface before, at the end of, and 20 days after the infiltration test. Pollutants commonly found in wastewaters were analyzed for all the loess samples. The test indicates the loess is more effective for Cd and Pb.

Abstract: : Controlled traffic with conservation tillage is an useful way to solve the problem of wheel track induced soil compaction. Based on field infiltration experiment, the effect of controlled traffic with conservation tillage on the performance of water infiltration was analyzed, so as to promoting its application in northern China. Results showed that, random wheel track caused significant soil compaction in the surface layer in annual two-crop region. Controlled traffic with conservation tillage reduced soil bulk density in 0-0.2m soil layer, and cone index averagely 29.3% in 0-0.4m soil layer, therefore improved water infiltration. Compared with non-controlled traffic treatments, controlled traffic with conservation tillage increased accumulative infiltration by 25.8%.

Abstract: The effect of different parameters on SO2 absorption was investigated in a semi-batchwise bubbling stirring reactor. From the experimental results, an increase of the gas flow, which substantially decreased the residence time of the gas in liquid, led to a quick reduce of the time of 100% removal efficiency of SO2. The addition of CaCO3 increased the removal efficiency of SO2 significantly. With increasing the concentration of CaCO3, the time of SO2=100% was almost increased linearly. The increase of the stirring speed prolonged the time of SO2=100% at first, but when beyond a certain value, no further effect of the stirring speed was observed, which showed that the mass transfer of SO2 in slurry was controlled by both gas and liquid mass transfer. Citric acid displays a good buffer action on SO2 absorption. The addition of citrate prolonged the time in which the SO2 removal efficiency remained high valves.

Abstract: Evaluation for urban sustainable development is very significant to improve the future development of urban. The analytic hierarchy process (AHP) is very suitable for evaluation of urban sustainable development. In the study, AHP is applied to evaluate urban sustainable development. On the basis of analyzing the evaluation indexes, evaluation model for urban sustainable development is constructed based on AHP. And we take Wuwei city in Gansu province as an example to study the evaluation performance of AHP. The result of the urban sustainable development is getting better and better towards 2020. The experimental results indicate the effectiveness and correctness of the proposed method.

Abstract: In the mountains area, we have to solve the problem that how to select appropriate method, accurately and effectively explore the burial condition and location of the deep mineral ore with complex terrain. Advanced and Convenient high-frequency magnetotelluric (HF-MT) sounding system Stratagem EH- 4 was applied to electromagnetic array profile survey in target mining area of northern Guangxi. Bostick and Rapid Relaxation Iterative inversion method were used to interpret the observational data, and it has been verified by the mine works that location of faults and orebodies marked by resulting images are tally with the real geological conditions, which provide resource base for the continued production of the mine. This measurement technique and interpretation method should be popularized and applied in mineral resources exploration, especially in mountains area.

Abstract: In this study, sediment samples were collected in Huoshaohei (HSH), Xihulu (XHL), Amuta (AMT), and Talahong (TLH) of Lianhuan Lake. Eleven chemical compounds of OCPs measured using GC-ECD method in the study area, including four HCH isomers (α-HCH, β-HCH, γ-HCH, δ-HCH), three DDT homologues (p,p’-DDT, p,p’-DDD, p,p’-DDE), Aldrin, Dieldrin, Endrin and Heptachlor. The ratio of (DDE + DDD)/∑DDT, the content of ∑HCH and ∑DDT, the correlations among TOC, ∑HCH, ∑DDT and OCPs were analyzed. The results show that HCHs and DDTs are major elements in this region and δ-HCH is the most dominant isomer in HCH, which was evidence of recent input of lindane. And higher amounts of OCPs occur in sediments with higher TOC content, DDTs and HCHs have similar sources which may come from usage of lindane and DDT in recent years.

Abstract: The Contingent Valuation Method can be used to assess the value of products with intangible benefits such as ecological products and so on. Forest eco-tourism product is the symbiosis product of forest ecological environment and tourism industry, which owns the function of increasing foreign exchange as well as carbon solidification and complies with the requirements of developing low-carbon economy. Forest eco-tourism product is a new growth point of forestry industry; however its value is underestimated by market price. This paper designed the survey objects, questionnaire, survey processes of Contingent Valuation Method that is suitable for Heilongjiang Province and the points should be attended during the implementation process, further, the willing expenditure utility function of Forest eco-tourism product is analyzed as well to provide a theoretical basis for the pricing of forest ecological product.

Abstract: The method of Set Pair Analysis is to study the certain and uncertain relationship between the different things and the key of this method is to calculate the connection degree of these things. In order to assess the urbanization levels, this paper proposed a new method to establish the assessment standards according to the value of assess indexes. The urbanization level of Yangtze River delta cities was assessed by Set Pair Analysis, and the results calculated are generally consistent with Nonlinear Mapping Analysis and Factor Analysis. Set Pair Analysis can provide an effective solution to urbanization assessment. The proposed method of standards establishment and Set Pair Analysis can also be used in other areas without unified assessment standards.