Regional eco-environmental analysis of Yuxi River-Chaohu Lake

Yuxi River-Chaohu Lake water suffers greatly from the ecological problems of eutrophication, high turbidity, organic pollution, disappearance of littoral macrophyte, bank erosion and reduction of economic fishery products. With Micro-cystis dominant, it is a degenerated and weak ecosystem. Its vicious cycling is caused by too much nutrient load, high spring water level and improper management of the water. The point sources of pollution from cities and industries contribute more than 50% of nutrient load. Soil erosion and fertilizer loss from late rice fields are important factors in non-point nutrient load. The disappearing littoral zone can neither give enough protection for the bank nor provide proper habitats for the biota. The feasibility of " ecological water level proposal" and means to reduce nutrient load are discussed to improve the habitat environment for both the nature and human being.     

纳滤膜深度处理自来水中有害物质的研究

采肜纳滤膜对某市自来水进行深度处理试验，结果表明：ＮＦ能有效地去除ＮＨ３－Ｎ、有机物，致突变物，无机离子等杂质。     

天然水中痕量磷酸根、亚砷酸根和砷酸根的浮膜分光光度法测定

本文研究了孔雀绿与磷（砷）酸钼的离子对膜的形成条件。并依此与共存元素分离，进行痕量磷酸根、亚砷酸根和砷酸根的浮膜分光光度法测定。选用硫酸为介质，考察了25种共存离子对测定的影响。拟定了天然水中痕量磷酸根、亚砷酸根和砷酸根的分析方法．操作简便，结果令人满意。     

Chemical forms of cobalt and nickel extracted by M1, M3 and CaCl2 DTPA

Mehlich 1(M1), mehlich 3(M3) and CaCl₂ DTPA have been used to predict the available micronutrient in soil. However, the forms of micronutrient extractable by these extractants are not known. In the present study, ten soils, collected from five provinces and the capital of China, representing a wide range of chemical and physical properties, were analyzed by sequential extraction to isolate five forms of cobalt and nickel, they are exchangeable, carbonate bound, Fe Mn oxide bound, organically bound and residual forms. The chemical forms extracted by M1, M3 and CaCl₂ DTPA were also investigated. The results show strong correlation between the carbonate bound or organically bound forms of Co or Ni and the amounts of extractable by any of the above three extractants. The main forms extracted by these extractants are carbonate and organically bound forms. The ranking of these three extractants for extraction of Co and Ni are M1>M3=CaCl₂ DTPA and M1=M3>CaCl₂ DTPA, respectively.     

Development of tourism resources and environment conservation in China: with special reference to Taishan Mountain

By analyzing the cases in Taishan Mountain, Shandong Province and other tourist sites in China, this paper pointed out the problems in tourism management, such as resources damage, environment pollution, which are the result of tourism development, and are obstacles to the development. The paper also gave suggestion and practical ways to preserve tourism resources and environment.     

A/O法处理医疗废水及快速挂膜方法

本文对A/O法处理医疗废水进行了探讨与实践,采用快速挂膜技术,可提高挂膜质量、缩短挂膜时间、提高处理效率,A/O法处理医疗废水工程实例说明该工艺可作为中、小型医院(生活)污水处理优选方案。     

Decomposition of gaseous CF2CIBr by cold plasma method

The paper presented the results regarding the decomposition of gaseous CF₂ClBr by cold plasma method.After two minutes discharge,the maximum decomposition rate of 2660 Pa CF₂ClBr pure and 2660 Pa CF₂ClBr plus 7980 Pa O₂ reached 60% and 80%,respectively.The paper also studied the cold plasma gas phase chemistry reaction mechanism of CF₂ClBr at low pressure,and the pressure effects of CF₂ClBr and added gas(He,N₂,O₂ and dry air)on the CF₂ClBr decomposition respectively by cold plasma method.These studies will be helpful to application of cold plasma method in the treatment of hazardous gaseous wastes.     

Characteristics of frail eco-environment in Hebei plateau

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Monitoring of Potential carcinogenic polycyclic aromatic compounds in the emission from coal combustion

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