废旧塑料回收利用技术

从我国废塑料回收利用的现状出发 ,分析了今后我国废塑料回收利用技术的发展趋势和应采取的措施 ,指出了废塑料回收利用的重要性。     

农业生态环境中的锰元素

论述了锰元素的地球化学特征和分布，农作物与锰元素的关系以及锰元素有效态含量的制约因素：土壤的含量、土壤的酸碱度、土壤的氧化还原环境、土壤的有机质含量。     

应用水质模型方法研究河流污染控制

应用水质模型对河流污染控制进行研究，经济、方便、有效。讨论了水质模型方法的原理、必然性、种类、建立步骤和应用范围，并以黄浦江为例，对水质模型的建立与应用进行了说明。     

非线性灰色模型在污染物总量预测中的应用

在前人工作的基础之上介绍了几种修正的ＧＭ（１，１）非线性模型，并以衡阳市１９９０～１９９６年城区污染物总量（ＣＯＤ）的预测为例，探讨了各种模型的应用效果。结果表明：非线性模型的拟合精度更高，具有更加广阔的发展前景。     

煤矿含悬浮物矿井水净化处理技术探讨

论述了含悬浮物矿井水净化处理利用的必要性，矿井水水质，水量和处理要求，现有的处理工艺，混凝剂及混合方式，主要处理构筑物和消毒方式等。指出了在确定处理规模，处理工艺，设计参数，药剂选择和投加过程中存在的问题，并给出了解决上述问题的方法。     

实施可持续发展战略，创建环保模范城区

总结了闵行区在创建环保模范城区工作中的主要做法，并以具体数据比较了创模前后该区的环境效益、经济效益及社会效益。结果表明，通过创模，全区的污染物排放总量得到了很大削减，环境质量有明显提高，投资环境有进一步改善。     

区域环评中废水排放量的预测方法研究

阐述了区域环评污染物排放源强的预测原则,对区域开发活动中废水量和COD排放量的预测方法作了详细论述,并以温州滨海新区环评为例作了实证研究.     

被动采样分析法用于空气监测优化布点的质量保证

用被动采样分析方法测定空气中SO2和NO2,在工作制度、人员、仪器等方面有严格的质量保证措施.膜片空白质控图表明,其方法和膜片是受控的,与自动监测系统对比,表明相关性良好.     

Characterizing wetland change at landscape scale in Jiangsu Province, China

Human activities produced great impacts on wetlands worldwide. Taking Jiangsu Province, China, as a representative wetland region subject to extensive human activities, the aim of this study is to understand the conversion trajectory and spatial differentiation in wetland change from a multi-scale perspective. Based on multi-temporal Landsat images, it was found that the natural wetlands decreased by 11.2% from 1990 to 2006 in Jiangsu Province. Transition matrices showed that the conversion of natural wetlands to human-made wetlands (mostly aquaculture ponds) was the major form of natural wetland reduction, accounting for over 60% of the reduction. Percentage reduction and area reduc tion of natural wetlands were respectively quantified within different wetland cover zones using a moving window analysis. Average percentage reduction showed a decreasing tendency with increasing wetland cover. The high-cover and mid-cover zone presented the largest area reduction at the scales of 1-2 km and 4-8 km, respectively. Local hotspots of natural wetland reduction were mapped using the equal-interval and quantile classification schemes. The hotspots were mostly concentrated in the Lixiahe marshes and the coastal wetland areas. For the area reduction hotspots, the quantile classification presented larger area and more patches than the equal-interval classification; while an opposite result was shown for the percentage reduction hotspots. With respect to the discontinuous distribution of the natural wetlands, area reduction could be more appropriate to represent reduction hotspots than percentage reduction in the study area. These findings could have useful implications to wetland conservation.     

Effectiveness of amendments on re-acidification and heavy metal immobilization in an extremely acidic mine soil

Previous studies have shown that the application of soil amendments is efficient in reducing acidity and heavy metal bioavailability in mine soils. However, it remains a challenge for environmentalists to predict accurately and control economically the re-acidification in re-vegetated mine soils. In this study, net acid generation (NAG) test and bioassay technique were employed to assess the effectiveness of the amendments [including lime, N-P-K (nitrogen, phosphorous and potassium) fertilizer, phosphate and river sediment] on re-acidification and heavy metal immobilization in an extremely acid (pH < 3) mine soil. Our results suggested that NAG test was a rapid and accurate approach to assess the effectiveness of the amendments on re-acidification potential of the mine soil. Interestingly, it was found that phosphate and river sediment played quite specific roles in preventing the re-acidification in the mine soil. In addition, the results also indicated that the addition of 25 t ha(-1) lime combined with river sediment (30%) might be an economical method to successfully control the acidification and re-acidification in the extremely acid mine soil, allowing the re-establishment of the plants. Collectively, our results implied that the combined use of NAG test and bioassay assessment was effective in evaluating a reclamation strategy for extremely acidic mine soils.