腐植酸中不同分子量组分与As(Ⅲ)的络合性能

采用超滤方法将腐植酸（HA）分成5个不同分子量组分,利用平衡透析法研究HA中不同分子量组分与As（III）的络合特征和作用机理,计算络合过程的条件分配系数、表观稳定常数.结果表明,腐植酸组分的分子量对HA与As（III）的络合过程有显著的影响,当分子量小于10kDa时,HA与As（III）络合能力明显强于其他条件.其中羧基和酚羟基在HA与砷络合中起重要作用,为主要络合位点.采用Scatchard分析和双位点配体模型对络合结果进行拟合,发现HA中不同分子量组分和As（III）的络合过程中均存在强和弱2种络合位点.     

Incorporating natural capital into economy-wide impact analysis: a case study from Alberta

Traditionally, decision-makers have relied on economic impactestimates derived from conventional economy-wide models. Conventional models lack the environmental linkages necessary for examining environmental stewardship and economic sustainability, and in particular the ability to assess the impact of policies on natural capital. This study investigatesenvironmentally extended economic impact estimation on a regionalscale using a case study region in the province of Alberta knownas the Foothills Model Forest (FMF). Conventional economic impactmodels are environmentally extended in pursuit of enhancingpolicy analysis and local decision-making. It is found that theflexibility of the computable general equilibrium (CGE) modelingapproach offers potential for environmental extension, with a solid grounding in economic theory. The CGE approach may be the tool of the future for more complete integrated environment andeconomic impact assessment.     

Optimal charges on river effluent from lumped and distributed sources

We propose a modelling framework for the design of a Pigouvian effluent tax, in an environmental management problem implicating several economic agents located in a river basin. The proposed charging system allows for the agents' geographical position relative to the river's sections, at which environmental standards are to be enforced, and takes into account the possible different market structures within which the agents are operating. In particular, we consider industrial agents competing on an oligopolistic market, and a set of farmers acting as price takers on a large market. A regional authority's goal is to induce agents to some sort of cooperation which would result in the satisfaction of the common environmental constraints. The economic process on one side, and the pollution transport and accumulation on the other, constitute two dynamic processes in two different time scales. As the economic process is much slower than the other process we can neglect the latter's transients and concentrate on the time invariant steady state solutions to the transportation equation. The model thus constructed has some noncooperative game and optimal control problem's features with space being the ‘running’ variable. This revised version was published online in July 2006 with corrections to the Cover Date.     

沙湾荒漠区生态环境的植物监测

利用植物生态学常规方法进行了荒漠植被种群生物量和数量特证调查,以植物为监测对象,并就群落地上部分生物量,Shannon-Wiener多样性指数,群落均匀度,生态优势度等指标探讨了在荒漠生态环境监测和评价中的具体应用。     

若干生态农业的模式及其应用

本文根据浙江省生态农业的实践,总结出数种生态农业模式,叙述了各种模式的结构、功能、效益、特点及应用现状,提出了模式的适用对象和应用时需重点注意的问题。     

Developing sediment quality criteria for heavy metal pollution in the Le An River with equilibrium partitioning approach

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溧阳市国家级生态示范区建设工作初探

综述了溧阳市创建国家级生态示范区的背景、依据、基础条件、创建的目标和技术路线，介绍了示范区建设的内容和具有特点的生态经济发展模式。     

再生资源与原生资源的比较

分别阐述了我国目前原生资源与再生资源回收利用的现状，通过原生资源与再生资源在性能、经济发展、生态环境和节能方面的比较，使我们进一步认识再生资源，大力发展再生资源产业。     

生态农业是可持续发展的必然选择

通过对三明市发展生态农业的实践回顾、现状调查及其影响因素的分析，提出相应的对策。     

可持续发展与草原生态环境保护——以内蒙古草原区为例

草原具有自然和社会两方面的功能，在实现这些功能的过程中，应该遵循可持续性发展原则来维持健康的草原。草原的自然功能是社会功能的基础和保障，草原的社会功能是自然功能的延伸和发展，社会功能的发挥是建立在自然功能实现基础之上的。内蒙古地区在发展过程中要以科学发展观为指导，把建设社会主义新牧区的任务与草原发展的丰富内涵结合起来，加强草原生态环境保护，建设环境友好型和资源节约型社会。