论经济欠发达地区如何建设生态工业园区——以千里山工业园区为例

资源和环境问题已成为各界关注的焦点,工业园区向现代生态工业园区建设转变是新形势生态文明下的必然要求。文章以内蒙古乌海市海勃湾区千里山工业园区为例,阐述了该工业园区建立生态型工业园区的可行性。     

Research on Mechanism of Diversified Investment and Financing in Building Ecological Cities

Ecological city is the advanced mode of harmonious development of city. Constant improvement is being made in the development of ecological city. However, building ecological city is an enormous project that calls for a huge amount of capital. The government fund is far from adequate. This paper probes into the fund issue and discusses in detail the mechanism of investment and financing in building ecological city from various aspects such as diversification of the investment subjects and the modes of financing.     

雁荡山自然景观的科学价值

雁荡山是一座白垩纪复活破火山，经断裂切割抬升而成为典型性的破火山立体模型。它向人们展示了破火山内部的各种地质要素和各类岩石的相互关系，提供了破火山喷发产物与中央侵入体有直接联系的证据。涵盖了流纹质岩浆火山爆发、喷溢、侵出、侵入等的完整过程，堪称流纹质火山岩类的天然博物馆。雁荡山不仅显现了白垩纪时期亚洲大陆边缘复活型破火山形成与演化的地质过程，而且是古太平洋伊泽奈奇（ｌｚａｎａｑｉ）板块向亚洲大陆俯冲、壳幔深部作用的一种地表标志性展示。雁荡山破火山的奇特景观代表着东亚亚热带滨海山岳地质生态模式、奇特优秀的自然景观、具普遍意义的杰出科学价值和浓厚的民族山水文化，三者交融在一起，构成了雁荡山所特有的世界上独一无二的、兼符自然与文化双重标准的自然遗产。     

Mercury in coal and its emission by coal combustion in the Northeast China

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｉｓｐａｐｅｒｒｅｐｏｒｔｓｓｔｕｄｉｅｓｏｆｔｈｅｍｅｒｃｕｒｙｃｏｎｔｅｎｔｓａｓｗｅｌｌａｓｔｈｅｉｒｄｉｓｔｒｉｂｕｔｉｏｎｉｎｃｏａｌｓｆｒｏｍ 12ｍａｉｎｃｏａｌｍｉｎｅｓｉｎｔｈｅＮｏｒｔｈｅａｓｔｏｆＣｈｉｎａａｎｄｔｈｅｅａｓｔｏｆＩｎｎｅｒＭｏｎｇｏｌｉａ .Ｔｈｅｃｏａｌ ｂｕｒｎｉｎｇｐｒｏｄｕｃｔｓａｒｅｄｉｖｉｄｅｄｉｎｔｏｔｈｒｅｅｐａｒｔｓ:ｂｏｔｔｏｍａｓｈ ,ｆｌｙａｓｈｉｎｄｕｓｔｃｏｌｌｅｃｔｏｒａｎｄｔｈｅｐａｒｔｅｓｃａｐｉｎｇ…     

臭氧氧化法深度处理印染废水生化处理出水

采用臭氧氧化法深度处理印染废水生化处理出水。实验结果表明,在进气流量为2.5 L/min、进气中臭氧质量浓度为12.5 mg/L、臭氧通气时间为30 min、后续反应时间为30 min的条件下,废水的COD去除率约为40%,色度去除率大于95%,处理后废水色度小于5倍,COD为45～70 mg/L,BOD5为10～13 mg/L,BOD5/COD=0.2,出水可生化性有所提高。三维荧光光谱分析和相对分子质量分布检测结果表明,臭氧氧化处理后废水中相对分子质量较大的物质被降解为相对分子质量较小的物质。     

The development of agro-residue densified fuel in China based on energetics analysis

Agro-residue is one of the important biomass resources in China and its efficient utilization is crucial for providing bio-energy, releasing risk of environmental pollution, and enhancing rural incomes. Densification is one of the important utilization routes of agro-residues. The objective of this paper is to explore the development of agro-residue densified fuel in China based on energetics analysis. The energetical property and energy potential of main agro-residues in China were firstly analyzed and then the development of agro-residue densified fuel in every region was evaluated based on energetics analysis. The results show that the main agro-residues in China are good feedstocks as densified fuel and they constitute enormous energy potential for developing densified fuel. However, the situation of every region should be considered for the development of agro-residue densified fuel. The primary energy embodied per unit of useful energy indicates that most of the regions in China are suitable for developing agro-residue densified fuel as it is energetically advantageous compared with coal, whereas only about 25% of regions near coal production locations are not suitable as they are less energetically advantageous.     

Rice yield development and the shrinking yield gaps in China, 1981–2008

Regional Environmental Change - Increasing population, limited land resources, and the demand for environmental protection highlight the urgency of improving crop yield on the limited cultivated...     

Spatial distribution of PAHs in a contaminated valley in Southeast China

A survey was conducted on the accumulation and spatial distribution of PAHs in surface soils under different land use patterns in a valley in the Yangtze Delta region with an area of 10 km² containing 15 small copper- and zinc-smelting furnaces. Sixty-five topsoil (0–20 cm) samples were collected and 16 PAHs were determined. The average amount of all the 16 PAHs ranged from 0 to 530 μg kg⁻¹ (oven dry basis), with a mean concentration of 33.2 μg kg⁻¹. Benzo[a]pyrene and indeno[1, 2, 3, -cd]pyrene were the two main PAHs present at high concentrations, while pyrene and fluorene had very low concentrations. PAH concentrations were higher in uncultivated than in cultivated soils, and areas of woods and shrubbery had the␣lowest soil PAH contents. The average PAH-homologue concentrations ranked as follows: 5-rings >> 3-rings, 4-rings > 6-rings >2-rings. Much higher concentrations of PAHs were found in the southern part of the sampling area, perhaps due to deposition of airborne particles by the southeasterly winds in winter and spring. We conclude that the small smelting furnaces were the dominant source of PAHs that accumulated in the soils and the southeasterly winds led to the spatial distribution of PAHs in the topsoils. Land vegetation cover and soil utilization patterns also affected the accumulation and distribution of soil PAHs.