南京地区农业资源的综合评价研究

客观、准确地评价地区农业资源,对于农业资源的开发和利用具有重要意义。本文从系统论观点出发,将地区农业资源分成自然资源和社会资源,在能够较好地反映系统结构特征、不同样点差异及满足易于收集、便于数量表示和定量处理等基本要求的基础上,选择了若干评价指标。利用综合指数法、区位商法等评价方法,对南京地区的主要农业资源（土地资源、气候资源与社会资源）进行了定量分析,并在此基础上,利用资源优势度分析法进行了综合评价。结果表明,南部小区的农业资源具有整体优势,南部和中部的资源利用较为合理,北部小区则具有较为丰富的后备资源。最后,根据各地资源要素的不同组合,简要给出了较适宜的开发途径,为该地农业资源的进一步开发与利用提供了依据。     

Degradation of Starch–Calcium Carbonate Disposable Packaging in a Solid Waste Composting Facility

The compostability of starch–CaCO₃ disposable packaging was examined in a source-separated municipal solid waste (MSW) composting facility located in East Hampton, NY. Source-separated MSW:starch–CaCO₃ container mixtures of 0 (control), 5, and 20% (by volume) were prepared as feedstock for composting. Compost samples were collected weekly or biweekly during the composting process and examined for fragments of the starch–CaCO₃ containers. Changes in compost quality due to the presence of starch–CaCO₃ containers were assessed by measuring the nutrient and metal content of the three resultant MSW:starch–CaCO₃ composts. Finally, plant growth studies were conducted to examine the composts for possible plant growth inhibition due to the deterioration of the starch–CaCO₃ containers. Results showed that portions of the starch–CaCO₃ containers were not identified in any of the 5 and 20% sieved and characterized compost fractions > 1.3 cm following 1–3 weeks of composting. Mechanical agitation of the waste along with optimum composting conditions were sufficient to initiate the rapid degradation of the starch–CaCO₃ composites. Degradation of starch–CaCO₃ containers did not affect compost nutrient and trace element content. Grass biomass measurements were performed once weekly over 28 days for grass grown in control (0%), 5%, and 20% starch–CaCO₃-containing compost:soil mixtures. Significant differences in grass biomass for these compost:soil mixtures were measured only for the 0 and 20% starch–CaCO₃-containing compost:soil mixtures at 28 days (9.07 vs 11.05 g, respectively; P = 0.046).     

RIPARIAN FOREST EFFECT ON LATERAL STREAM CHANNEL MIGRATION IN THE GLACIAL TILL PLAINS1

ABSTRACT: Dendrochronology analyses of point bar complexes were used to quantify the effects of riparian forests on local lateral migration of bends in seven streams in the glacial till plains of north central Missouri. Stream bends were paired with similar bank height, midchannel radius of curvature, soil composition, and watershed size. In each pair, one concave bank was forested and one was unforested. Stream bends with unforested concave banks had an average local migration rate three times greater than stream bends that had forested concave banks.     

复合型人工湿地对抚仙湖入湖河道污水中氮的去除

在抚仙湖北岸构建复合型人工湿地污水处理系统,对窑泥沟入湖河道污水中氮的去除效果进行了试验研究,结果表明,系统水力负荷年平均为37mm/d,氮负荷年平均为3.315g/m2·d,对污水中NOx、NH+4、TON和TN去除率年平均分别为62.7%、53.8%、62.4%和57.5%.     

炼铁上料系统除尘设计体会点滴

就炼铁高炉矿槽除尘系统的方式，提出了一些革新的措施，涉及到阀门、吸气罩、风幕及控制方法等     

Integrated environmental assessment: an urban perspective

１　ＩｎｔｒｏｄｕｃｔｉｏｎＵｒｂａｎａｒｅａｓｔｈｒｏｕｇｈｏｕｔｔｈｅｗｏｒｌｄａｒｅｉｎｃｒｅａｓｉｎｇｌｙａｆｏｃｕｓｏｆｅｎｖｉｒｏｎｍｅｎｔａｌｃｏｎｃｅｒｎ．Ｔｈｅｙａｒｅｐｌａｃｅｓｏｆｉｎｔｅｎｓｅａｎｄｇｒｏｗｉｎｇｅｃｏｎｏｍｉｃａｃｔｉｖｉｔｙ．Ｉｎｒｅｓｐｏｎｓｅ，ｕｒｂａｎｐｏｐｕｌａｔｉｏｎｓａｒｅｇｒｏｗｉｎｇｒａｐｉｄｌｙ．Ｉｔｉｓｅｓｔｉｍａｔｅｄｔｈａｔ，ｂｙ２０００，ｍｏｒｅｔｈａｎｈａｌｆｔｈｅｗｏｒｌｄ○ｓｐｏｐｕｌａｔｉｏｎｗｉｌｌｌｉｖｅｉｎｔｏｗ…     

Integrated assessment of urban environment in China

１　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｅｇｒａｔｅｄｅｎｖｉｒｏｎｍｅｎｔａｌａｓｓｅｓｓｍｅｎｔ（ＩＥＡ）ｉｓａｆｕｎｄａｍｅｎｔａｌｍｅａｎｓｆｏｒｃｏｍｐｒｅｈｅｎｓｉｖｅｅｎｖｉｒｏｎｍｅｎｔａｌｍａｎａｇｅｍｅｎｔａｎｄｆｏｒｃｏｏｒｄｉｎａｔｉｎｇｔｈｅｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｅｃｏｎｏｍｉｃｄｅｖｅｌｏｐｍｅｎｔａｎｄｅｎｖｉｒｏｎｍｅｎｔａｌｐｒｏｔｅｃｔｉｏｎ．ＩＥＡａｉｍｓｔｏｉｄｅｎｔｉｆｙｔｈｅｍａｉｎｅｎｖｉｒｏｎｍｅｎｔａｌｐｒｏｂｌｅｍｓｉｎａｒｅｇｉｏｎ…     

物化-生化组合工艺处理化纤纺织品染色废水

采用物化 生化组合工艺处理化纤纺织品染色废水 ,结果表明 ,当进水COD为 2 50 0～ 550 0mg/L、色度为 6 0 0倍 ,BOD5 为 6 0 0～ 1 40 0mg/L时 ,COD去除率和BOD5 去除率均在 95%以上 ,脱色率可达 93% ,出水达到了排放标准。该工艺适合各种规模化纤纺织品染色厂的废水处理。     

机械工业废水中重金属离子的处理工艺研究

研究了过氧化钙处理剂对机械工业废水中重金属离子锰、铜、锌、铬的处理工艺，以及过滤方法对重金属离子去除率的影响。处理的最佳条件为：过氧化钙用量0．1％～0．2％，处理时间30min，处理温度为室温，处理过程中不需调整pH。     

络合吸收结合生物转化去除氮氧化物技术

介绍了络合吸收结合生物转化处理NOx 技术的基本原理和目前的研究进展情况 ,并分析了该技术处理氮氧化物存在的问题和未来发展方向