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Chang H.,China Offshore Environmental Service Co. | Tong L.,Appraisal Center for Environmental and Engineering | Li G.-R.,China Offshore Environmental Service Co. | Zhu S.-F.,China National Offshore Oil Corporation
Xiandai Huagong/Modern Chemical Industry | Year: 2013

The history of butadiene production in China, the technology development and the application of butadiene in China are introduced. The butadiene production technologies include the technology of ACN (acetonitrile), DMF (dimethylformamide), NMP (N-Methyl pyrrolidone) and other latest production technologies. The problems existed in current butadiene industries are pointed out. The suggestions for the development of butadiene production technology are proposed as well. Source

Zhang Y.,North China Electrical Power University | Shen J.,North China Electrical Power University | Ding F.,Appraisal Center for Environmental and Engineering | Li Y.,North China Electrical Power University | He L.,North China Electrical Power University
Science of the Total Environment | Year: 2016

Atmospheric environment quality worsening is a substantial threat to public health worldwide, and in many places, air pollution due to the intensification of the human activity is increasing dramatically. However, no studies have been investigated the integration of vulnerability assessment and atmospheric environment driven by human impacts. The objective of this study was to identify and prioritize the undesirable environmental changes as an early warning system for environment managers and decision makers in term of human, atmospheric environment, and social economic elements. We conduct a vulnerability assessment method of atmospheric environment associated with human impact, this method integrates spatial context of Geographic Information System (GIS) tool, multi-criteria decision analysis (MCDA) method, ordered weighted averaging (OWA) operators under the Exposure-Sensitivity- Adaptive Capacity (ESA) framework. Decision makers can find out relevant vulnerability assessment results with different vulnerable attitudes. In the Beijing-Tianjin-Hebei (BTH) region, China, we further applied this developed method and proved it to be reliable and consistent with the China Environmental Status Bulletin. Results indicate that the vulnerability of atmospheric environment in the BTH region is not optimistic, and environment managers should do more about air pollution. Thus, the most appropriate strategic decision and development program of city or state can be picked out assisting by the vulnerable results. © 2016 Elsevier B.V. Source

Qi C.J.,Appraisal Center for Environmental and Engineering | Qi C.J.,Impact Lab | Lu B.H.,Hohai University
Advanced Materials Research | Year: 2014

When a reservoir is built, it will change the hydraulic features of the natural river, and cause thermal stratification which has significantly influence on the reservoir area and downstream ecological environment. Through analysis of the temporal and spatial variations of the observed temperature in terms of the prototype temperature observations in Ertan reservoir, the preliminary conclusions can be gained as follows: the water temperature distribution in Ertan reservoir is basically represented as isothermal in the same depth plane, and as stratifies along water depth. The great monthly variations of water-temperature in the reservoir are affected by the air temperature obviously. © (2014) Trans Tech Publications, Switzerland. Source

Wang J.,China University of Mining and Technology | Wang C.,China University of Mining and Technology | Huang Q.,Henan Institute of Engineering | Ding F.,Appraisal Center for Environmental and Engineering | He X.,China University of Mining and Technology
Soil and Sediment Contamination | Year: 2015

In a seawater environment, the particle size of sediment and salinity play an important role in the adsorption behaviors of polycyclic aromatic hydrocarbons (PAHs) on sediment. In this study, batch adsorption experiments were carried out with the sediments from the Yellow River Delta (YRD) to explore the effect of particle size and salinity on the adsorption behaviors of phenanthrene (Phe), fluoranthene (Fla), and pyrene (Pyr). Adsorption isotherms of PAHs on different-sized sediments can be described by a Freundlich model with the correlation coefficients ranging from 0.96 to 0.99. The adsorption capacity of PAHs was in reverse proportion to the particle size of the sediments and in direct proportion to salinity. The sediments with smaller particle size possessed higher content of aromatic and fat components, which had strong adsorption capacity toward PAHs. Salinity influenced the adsorption behaviors of PAHs by changing the solubility of PAHs and the physicochemical properties of the sediments. The salting-out constants of Phe, Fla, and Pyr were in the range of 0.292 to 0.296, 0.230 to 0.289, and 0.293 to 0.307 l/mol, respectively. These research findings are of importance to an assessment of the fate and transport of PAHs in seawater-sediment systems. © 2015, Taylor & Francis Group, LLC. Source

Qi C.J.,Appraisal Center for Environmental and Engineering | Qi C.J.,Institute of Hydropower and Environment Research | Zhai Y.,Beijing Institute of Water | Lu B.H.,Hohai University | And 2 more authors.
Advanced Materials Research | Year: 2014

The vertical distribution of the reservoir water temperature depends on the scale of the reservoir, regulation manners, as well as the hydrological and geological conditions near reservoir areas. Based on water temperature observation from three different regulation reservoirs, this paper analyses the vertical distribution of these reservoirs water temperature. The preliminary conclusions are: for multi-annual regulation reservoirs, the upper zones usually have stable temperature stratification structures, while the lower zones have constant low temperature; for annual regulation reservoirs, water temperature distribution changes with depth; for the daily regulation reservoirs with low water depths present mixed vertical distributions of water temperature. © (2014) Trans Tech Publications, Switzerland. Source

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