Advanced Materials Research Vols. 955-959

Abstract: Based on investigation data in Jiaozhou bay waters from 1979 to 1985(absent of 1984), this paper tried to anylysis the horizontal distributions and pollution sources and characteristics of Hg in Jiaozhou Bay. The results showed that, the horizonal distributions of Hg in surface water of Jiaozhou Bay showed decreasing trends from river flow direct, and the major pollution source of Hg was point source, whose pollutants were transferred by stream discharge. Under the influences of point source pollution, the Hg concentrations in surface waters could range from 0.46-13.04 μg.L^-1; while under the influences of ocean current itself, the concentration of Hg in bay mouth area could range from 0.46-13.04 μg.L^-1. The pollution sources of Hg in Jiaozhou Bay could be catagoried as two levels as high-pollution sources and non-pollution sources, due to Hg in this bay was mainly impacted by point source. It is necessary to enhance the recovery ratio of Hg, and to reduce the discharge of Hg.

Abstract: The heavy metal content in fish (Chaeturichthys stigmatias Richardson) tissue in the oil spill area of Bohai Bay had been evaluated though the determination results, the distribution and variation difference of the heavy metal content in fish tissue had been discussed The fish of each sample stations were not polluted by heavy metals.

Abstract: The daily pollutant variations of PM_2.5, PM₁₀, SO₂ and NO₂ are useful for environment protection and advices for human health. Two years data from three different time period before Spring Festival (SF), after SF and after Lantern Festival (LF) in Shenyang city of year 2013 and 2014 was analyzed. Results showed that concentrations of PM_2.5, PM₁₀, SO₂ and NO₂ were higher in 2014 than those in 2013, especially for SO₂ and NO₂; Among the three periods, concentrations of four air pollutants followed the sequence of after LF > before SF > after SF and road traffic emissions are more contributive than firework combustion during the festival celebration. We conclude that air pollution in Shenyang City is worsening and more influenced by vehicular pollution.

Abstract: We study the absorption spectra of water vapor by the 899-29 Ti:sapphire laser in the region between 12 252-12 312 cm^-1. Due to the weak absorption of H₂O, a folded multi-pass optical path cell of Herriott-type is used to increase the sensitivity of detection. Totally, forty-three lines with intensity ranging around 10^-24cm^-1/molecule are recorded and the centre frequency of transitions is derived by fitting observed lines using Voigt profile.

Abstract: The quantitative analysis to the real and the complex system in high precision has very important significance. The premise of quantitative analysis is to quantificat the system. But Due to the limitation of subjective and objective conditions, It is difficult for the quantification of the symtem to meet the requirements of the sampling theorem and then the quantification of large sampling period data inevitably lost a lot of system information, so that it become impossible to precision analyse the system. This paper puts forward the view that: there is the meaning of the general law of causation in the space-time whirl structure and on the basis of this theory the quantitative analysis can have higher accuracy and reliability.

Abstract: Response surface methodology based on single factors was used to optimize the process condition for extraction of nitrite nitrogen in sediment . The results indicated that the extraction amount of nitrite nitrogen was 9.5μg /g under the optimum condition of extraction time of 44min, ultrasonic power of 280W, solid-liquid ratio of 1:19,which was closed to the predicated yield of 9.3μg/g. The process can be used for the extraction of nitrite nitrogen in sediments.

Abstract: The heavy metal content of water in the oil spill area of Bohai Bay had been evaluated though the determination results, the distribution and variation difference of the heavy metal content in water had been discussed, In 2013 spring, 32 water samples had been collected in the oil spill area of Bohai Bay to measure chromium(Cr), zinc(Zn), copper(Cu), arsenic(As), cadmium(Cd), mercury(Hg) and lead(Pb) content. In surface water the heavy metal content from high to low was Cu, Zn, Cr, As, Pb, Cd, Hg, and the same as it in bottom water. Cr, As, Cd, Hg and Pb were not beyond first class value of the seawater quality standard except Zn and Cu.

Abstract: The article introduces the ecological environment in China, analyses the situation of the atmosphere pollution and water pollution, and then introduces the cross-boundary governance theory, which can solve the environmental problem, at last analyses the countermeasures of ecological environment in China: reinforce the environmental protection functions of governments; draft the plan of national and regional environmental protection and cooperation; enhance the organization mechanism of national and regional environmental protection.

Abstract: This thesis selects six factors, including DO, COD, BOD5, ammonia nitrogen, total phosphorus and potassium permanganate as monitoring indexes to evaluate the wetland water quality of Huangjia Lake in Wuhan City with the method of fuzzy comprehensive evaluation referring to Environmental Quality Standards for Surface Water. The result is basically identical with that of single factor index method. Evaluation results show that the wetland water quality in Hubei College of Traditional Chinese Medicine and Wuhan University of Science and Technology is of good quality with slight pollution.

Abstract: An indirect competitive immunoassay using quantum dots (QDs) as the fluorescent label has been developed for detection of melamine in milk products. The method exhibited a response for melamine with IC₅₀ value of 11.3 ng mL^-1 and a detection limit of 0.27 ng mL^-1. Milk and milk powder samples spiked with melamine have been analyzed, and the method provided recoveries ranging from 84.2% to 108.0%, and a CV of 12.8%. The implementation of QDs provides for at least 30 fold improvement of detection limit when compared with optically-based ELISA screening methods that have been reported. The analytical performance in combination with simplicity of sample and antibody preparation provides the basis for a practical method for melamine detection.