低床层烟炱吸附法脱硫试验及机理探讨

研究了以锅炉烟气沉降物为吸附剂的烟炱吸附法脱除SO2的工艺条件，结果表明该法较适宜的工艺条件为SO2浓度小于2400mg/L,烟气流速小于36m/h，烟气温度低于100℃，此时脱硫效率可达30％以上。初步探讨了烟炱吸附法脱硫的作用机理。     

稻米和土壤中农美利残留量气相色谱分析方法的研究

建立了测定稻田土壤、稻米中农美利残留量的气相色谱分析方法。用配有NPD的气相色谱仪、DB-1301毛细管柱测定稻田土壤及稻米中农美利的残留量，最低检测浓度为0．01mg／kg、平均回收率为80．4％-99．8％，变异系数为6．3％-11．7％，均达到残留分析的要求。     

过滤捕集法处理含DEP雾废气的研究

为了探讨玻璃纤维过滤器处理含DEP雾废气的效率问题,在实验室进行了DEP雾去除实验。考查了不同气体入口浓度、过滤流速下玻璃纤维过滤捕集装置对含DEP雾废气的净化能力,结果表明:利用玻璃纤维过滤器去除DEP雾,在DEP雾粒径主要分布为0.48～3.4μm之间,DEP雾浓度小于220 mg/m3,过滤流速小于10 cm/s情况下,玻璃纤维过滤器对DEP雾的去除率大于99%,最大气体流量下的压力降小于1610Pa;同时对含油(酸)雾废气除雾效果好,特别是对于粒径特别细微的油(酸)雾,捕集效率也很高,还可回收利用,不会产生二次污染。     

小型炭素焙烧炉沥青烟气净化技术初探

阐述了颗粒层吸附技术在小型炭素焙烧沥青烟气净化中的应用。     

现代电化学技术与环境保护

介绍了电化学技术在清洁工艺的开发、清洁产品的制备、废水与废气的处理、被污染土壤的修复和环境污染物监测方面的应用情况。电化学技术具有能量利用率高、经济实用以及污染物产生量少或污染物去除率高等特点，在环境保护领域具有广阔的应用前景。     

黄磷尾气现场脱硫试验

黄磷尾气的主要成分是CO，其中含硫杂质主要以硫化氢的形式存在。测定了黄磷尾气中硫化氢、氧气的含量，分别采用吸收、吸附工艺及其组合工艺对黄磷尾气进行了现场脱硫试验，得出了最佳的黄磷尾气净化脱硫工艺，即吸收、活性炭变温吸附。出口气中H2s的质量浓度为1—5mg/m^3，净化效率达到99．7％。     

Effect of soil solids concentration in batch tests on the partition coefficients of organic pollutants in landfill liner-soil materials

 The effect of the soil solids concentration in batch tests on the measured values of the partition coefficient (K _p) of organic pollutants in landfill liner-soil material was investigated. Since this study was based on the results of batch and column tests conducted independently, there were limitations to the conclusions derived. The organic compounds tested were benzene, methylene chloride, toluene, trichloroethylene, and p-xylene. The results of this study showed that as soil solids concentrations increased, the measured K _p values of these organic compounds strongly decreased. The observed values of K _p stabilized when the soil solids concentration was above a certain value. Typical K _p values obtained from batch tests conducted under high soil solids concentrations were close to those obtained from column tests. It was concluded that the K _p values of organic compounds measured under low soil solids concentrations, i.e., less than 100 g/l, may not correctly simulate the field situation. Consequently, the values of K _p obtained with low soil solids concentrations can result in an overestimation of the retardation factor of the landfill liner material. Received: March 14, 2002 / Accepted: August 25, 2002     

Drying of granulated wood ash by flue gas from saw dust and natural gas combustion

At the district heating plant of Kalmar, Sweden an on-line unit for production of granulated wood ash for nutrient recycling on forest soils is being applied. Currently, the granules are dried by hot air from an oil-fired burner. The objective of this work was to investigate how drying by flue gas affects the hardening of granules, or impacts their chemical composition and properties. Ninety-six granule samples were treated by flue gas from natural gas combustion in a laboratory pilot scale flue gas generator. CO₂, CO, O₂, C₃H₈ and NO concentrations were varied during the experiment. Additionally, some samples were treated by flue gas from combustion of sawdust at the heating plant in Kalmar. Drying by flue gases did not affect the chemical composition of granules, but minor effects were seen in their mineralogy. The carbonate content was slightly higher in granules treated with flue gas from natural gas combustion compared to the granules dried by hot air only, when measured by wet chemical methods. Results from XRD analysis imply that the calcite content is higher and the portlandite and arcanite content slightly less in granules treated with flue gas from sawdust combustion compared to the granules dried by hot air only. The results from this investigation showed no negative effects on ash granule composition or physical structure by the use of a flue as a drying medium.     

ANALYZING CORRELATIONS BETWEEN STREAM AND WATERSHED ATTRIBUTES1

ABSTRACT: Bivariate correlation analysis has been widely used to explore relationships between stream and watershed attributes that have all been measured on the same set of watersheds or sampling locations. Researchers routinely test H₀: ρ= 0 for each correlation in a large table and then go on to discuss only those that are declared “significant.” Such test results are inaccurate because no allowance is made for multiple testing, and also because the tests are not mutually independent. This paper reviews the Bonferroni approach to controlling the overall error rate in multiple testing and shows how the approach becomes impractical for large correlation tables. The Hotelling/Williams test is introduced for comparing two dependent correlations that share a variable, and numerical constraints for two such correlations are illustrated. References are also given for testing other hypothesized patterns among dependent correlations, and links to dependent correlation software are provided. The methods are illustrated for watershed and stream variables sampled in 23 small agricultural watersheds of the Willamette Valley, Oregon.     

土与结构相互作用体系振动台模型试验数值模拟研究(英文)

运用土与结构动力相互作用 (SSI)有限元三维分析软件 SASSI2 0 0 0对一个土与结构动力相互作用体系振动台模型试验进行了模拟计算。对振动台模型试验作了简单的介绍 ,并详细叙述了试验的建模方法。对于试验中的刚性地基和柔性地基条件 ,El- centro波、Taft波和 5 0年超越概率为 10 %的南京人工波等三种地震波输入 ,三个加速度峰值水平 0 .1g、0 .2 g、0 .3g及两个水平向地震波输入的各种组合工况均进行了计算。在数值计算中 ,假设地基土为覆盖于基岩上的半无限粘弹性水平成层土 ,采用等效线性模型考虑土的动力非线性的影响 ;上部结构用三维杆系有限元单元模拟 ,楼板用四结点壳单元模拟 ,每个结点有三个平动自由度和三个转动自由度 ,模型试验中所施加的人工质量均匀分布于壳单元上 ;基础视为平板基础 ,用八结点块体单元模拟 ,每个结点有三个平动自由度。将试验结果与计算结果进行对比较 ,结果表明 :计算所建立的模型较好地模拟了相互作用体系在地震荷载下的反应性状 ,计算结果与试验结果吻合较好 ,SSI效应对结构地震反应有很大影响