Function of Agricultural Land Use and Its Evolvement in Peri-urban Area: A Case Study of Beijing

Abstract

Rapid urbanization in Beijing stimulates the urban land expansion and diminishes available agricultural land. Monofunctional agricultural land use can not meet the demand of the development of the multifunctional agriculture and urbanization any more, so multifunctional agricultural land use is going to be promoted in the city. This article proposes the evolvement of the land use change from 1992 to 2004 and discusses some evolvement views.     

Prospering Revolution of Resource Efficiency in Northeast Industrial Area in China

Abstract

Despite its strong advantages in resource, technology and human resource, China's Northeast Industrial Area is also experiencing problems of unreasonable industrial structure, environmental pollution, and the degradation of ecological condition, etc., which prevent this area from achieving a sustainable development. Through analyzing the resource problem, the present paper proposed a strategy of circular economy for the prosperity of this are, discussed the theories of circular economy and resource recycling, and finally concluded that improving resource productivity is at the core of circular economy.     

Empirically Analysis of the CO2 Emissions Embodied in Exports of China

Abstract

In this paper, using the input-output model, the author first calculated the CO₂ emissions embodied in exports of China in 2002 and 2007. Then, the author empirically analyzed problems existing in the composition of exported products and analyzed its possible reasons. The research results of this paper are as follows: Since China’s entry into WTO, the CO₂ emissions embodied in exports of China have been increasing rapidly; the value of exported products of high-carbon emissions industries accounts for a relatively higher proportion to China’s total exports value because China’s carbon intensive products have a certain competitive advantage. Additionally, this paper has put forward relevant suggestions based on these results.     

河流型油污染应急监测案例分析研究

以在湘江中下游发生的跨多市的油污染事故为例,详细阐述了对该污染事故开展应急监测的全过程,包括基本情况介绍、应急响应、应急监测方案编制、应急监测结果综合分析等内容;并针对该类型污染事故应急监测进行了管理和技术经验总结,包括强调多部门联合处置的必要性,摆正应急监测在应急中的正确位置,应急监测时信息流转通畅的关键作用,妥善开展应急处置的重要性以及明确应急处置责任主体等内容.     

Removal of polycyclic aromatic hydrocarbons from aqueous solution on soybean stalk-based carbon

Soybean [ (L.) Merr.] stalk-based carbons were prepared by phosphoric acid activation at different carbonization temperatures. Characteristics of the prepared carbon, including specific surface area, iodine number, and amount of methylene blue sorption, were determined. Experiments on phenanthrene, naphthalene, and acenaphthene, as representatives of polycyclic aromatic hydrocarbons (PAHs), removal from aqueous solution by the prepared carbon were conducted at different levels of carbon addition. The results indicated that the specific surface area, iodine number, and amount of methylene blue sorption increased with an increase of carbonization temperature. The maximum values were observed at 700°C and were 287.63 m g, 508.99 mg g, and 90.14 mg g, respectively. The removal efficiencies of phenanthrene, naphthalene, and acenaphthene tended to increase with increasing carbon amounts and carbonization temperature. The optimal removal performance was obtained under the experimental conditions of carbon concentrations of 0.04 g 32 mL and carbonization temperature of 700°C, and the removal efficiencies of phenanthrene, naphthalene, and acenaphthene were 99.89, 100, and 95.64%, respectively. The performance of the prepared carbon was superior to that of commercial activated carbon. Additionally, for the same carbon concentrations, the removal efficiency of PAHs on prepared carbons followed the order: phenanthrene > naphthalene > acenaphthene. Results obtained from this work provide some insight into the reuse of an agricultural residue, and also provide a new application for the treatment of PAHs in contaminated water utilizing activated carbon prepared from agricultural residues.     

Recovery of biomass wastes by hydrolysis in sub-critical water

The recovery of waste substances is important not only for the prevention of environmental issues, but also for the rational utilization of natural resources. Hydrolysis reaction in sub-critical water is a promising method for the treatment of organic wastes and has been attracting worldwide attention. In this paper, sub-critical water hydrolysis was employed as a method for producing amino acids, reducing sugars, bio-oil and gas fuels from biomass wastes. The current statuses of these useful chemicals production from biomass wastes by hydrolysis in sub-critical water were reviewed. The review indicates that sub-critical water hydrolysis can be an efficient process for recovering useful chemicals from biomass wastes. This method is renewable, sustainable, efficient, and safe for the environment.     

玻璃钢管线在英买力潜山原油集输中的应用

埋地管道的腐蚀是影响油气田地面工程安全运行的重要因素之一,玻璃钢管道的非金属特性根除了腐蚀环境的形成,杜绝了管道腐蚀穿孔事件的发生,降低了污染土壤等环境问题发生的机率,塔里木油田管道服役现状、史密斯公司30a的研究结果对此做了充分的诠释。英—红外输油管道和哈森-威廉姆斯公式分别从实践和理论上展示了玻璃钢管卓越的水力特性,英买力潜山玻璃钢管线具有良好的经济和社会效益。     

辽宁省经济发展与环境污染水平计量模型研究

选取辽宁省1981-2009年经济与环境数据,通过计量模型探讨辽宁省经济增长与环境质量的演替轨迹.结果表明,1981-2009年辽宁省环境库兹涅茨曲线大体呈现“倒U形+U形+倒U形”特征,即“M形”,表明辽宁省的综合环境污染水平随经济增长呈现波动变化;工业废水排放量、工业废气排放量、工业固体废物产生量等单项指标的环境库兹涅茨曲线形态分别为“U形”曲线左侧部分、“U形+倒U形”和“U形”曲线右侧部分;进一步分析表明,辽宁省EKC特征与工业结构变化、环境保护投资等有显著相关性.     

环境类高等职业教育产学研用合作机制研究

环境类高等职业教育具有鲜明的非行业背景和人才需求领域广泛而应用岗位相对集中的特殊性。在对国内部分环境类高职院校和环境类高职专业就产学研用合作机制及运行模式实地调研的基础上,对现存的环境类高职院校产学研用合作模式进行了深入分析,提出了"依托政府,实施‘双轨并行’工学结合"的产学研用合作机制与运行模式。     

课证融合模式下实训教学改革研究

课证融合模式就是将课程与职业资格证书相结合的教学模式,是对职业教学改革的探索。但当前存在的实训教学标准模糊、校企合作实训教学条件不足、教师队伍转型滞后、教材开发混乱等现象严重阻碍了课证融合模式的推行,职业院校应当从明确考核评价标准、改进培养方案、加大双师教师的引进和培养、科学开发实训教材等途径进行尝试,推进课证融合。