从清洁区看广州市空气污染变化及污染控制对策

通过广州市空气自动监测系统清洁区子站1985～1997年间的二氧化硫、氨氧化物的监测结果与其他五个功能区的对比分析，揭示了广州市近年来二氧化硫受内外污染综合影响，污染范围在扩展，污染程度在加重。氨氧化物污染也在加重，而且污染程度已超过二氧化硫；从而提出了有关的建议和污染控制对策。     

浅析乡镇生态经济系统的良性发展

乡镇生态经济是以生态农业为基础，以生态型工业为主导的生态经济。只有发展生态农业和生态型工业，才能使乡镇生态经济系统的结构不断优化、功能不断增强，才能使资源合理利用。     

《千年生态系统评估》

揭示生态系统变化对人类福祉的影响警醒决策者与公众做出积极反应。[编者按]     

Adsorption of Pb, Cd to Fe, Mn oxides in natural freshwater surface coatings developed in different seasons

Metal oxides( Fe, Mn oxides) in natural surface coatings(biofilms and associated minerals) are believed to play a significant role n the fate and transport of trace metal in aquatic environments. Seasonal variation of Fe, Mn oxides and organic materials in surface oatings, which were developed periodically on glass slides in Nanhu Lake, Jilin Province, China over the time frame of three seasons,was investigated in order to understand the influence of metal oxides on Pb and Cd adsorption to heterogeneous surface coating materials(biofilm). Pb and Cd adsorption was measured under controlled laboratory conditions( mineral salts solution with defined speciation, ionic trength 0.05 mol/L, 25~C and pH 6.0). The classical Langmuir adsorption isotherm was applied to estimate equilibrium coefficients of Pb nd Cd adsorption to the surface coatings. In general, components in the surface coatings varied greatly with seasons altering and btained higher concentrations in summer while the content of iron oxides always exceeded that of manganese oxides. Correlation nalyses between the maximum adsorption of Pb and Cd and components in the surface coatings developed periodically indicated that Pb hase association with Mn oxides and Cd phase association with Fe oxides as well as Mn oxides were statistically significant. Effect of Mn xides on Cd adsorption was confirmed in view of its higher content in the surface coatings. The importance of ferromanganese oxides for b and Cd adsorption to the natural surface coatings developed in different seasons was evidenced.     

沈阳市大气扩散模式系统应用

以新一代空气质量模式系统作为基础模式，应用2002年沈阳市SO2环境监测、污染源排放清单及气象资料，模拟沈阳市SO2环境空气质量，并与沈阳市6个环境监测站的监测资料进行对比验证，验证结果表明相关系数为0．76；6个监测点平均值的相对误差为-11．6％；证明该模式性能较好。     

中国节水技术政策大纲（中）

发展外排废水回用和“零排放”技术。鼓励和支持企业外排废（污）水处理后回用，大力推广外排废（污）水处理后回用于循环冷却水系统的技术。在缺水以及生态环境要求高的地区，鼓励企业应用废水“零排放”技术。     

思维循环链

思维的节点，组成思维系统的连线，在探索事物规律的轨道上向前；思维的循环，结成思维提升的罗旋，在俯视事物层面的山峦间登攀；思维的闪光，集成思维凸现的灵感，在采掘事物的矿产中开钻。[编者按]     

HCR／气浮／SBR工艺处理制浆造纸废水

制浆废水先经HCR工艺处理，造纸废水先经气浮处理，然后，2种废水混合一起进入SBR反应器进一步进行生化处理，最终出水实现达标排放。采取有效措施控制了生化处理系统中的污泥膨胀现象。     

农业非点源污染环境影响及防治

非点源污染也称面源污染,因其污染的时空范围广,不确定性大,污染严重,对其治理及管理的难度也较大.由于化肥和农药的大量使用,农业非点源已成为中国水环境的主要污染源.文章中对农业非点源污染的特点、来源和危害进行了系统论述,并提出防治农业非点源污染的具体措施建议.     

环境监测系统在实验室检测能力验证中存在的问题及对策

根据2004年黑龙江省环境监测系统能力验证情况,简述了检测实验室能力验证范围及测试项目,通过检测能力验证的测试结果,分析了实验室检测中存在的问题和原因,并提出了对策建议等.