电磁污染及其防护对策

电磁污染已成为当代首屈一指的物理污染。介绍了电磁辐射的分类、传播、电磁污染的来源，指出了电磁辐射对人体的危害及对电子设备的干扰，提出了电磁污染的防护对策和建议。     

电网建设项目竣工环保验收初探

电网建设项目竣工环保验收工作,在我国还处于起步阶段,江苏省电力公司根据电网建设项目数量多,工程类型相似,污染因子单一,环境影响较小的特点,在组织环保验收的工作中,摸索出建立环保验收档案,选择典型线路和监测点,“打包”进行运行期环境影响评价等方法,2年内成功地完成了300多项110～220 kV电网建设项目的环保验收,这种大批量电网建设项目环保监测和验收的模式,得到了地方环保部门的肯定.     

压力式喷嘴在湿法烟气脱硫中的应用

从压力式喷嘴的结构特点、雾化特性及影响因素出发。系统叙述了压力式喷嘴的研究历史与现状。结合湿法脱硫工艺的特点，阐述了压力式喷嘴在湿法脱硫中的应用。并分析了当前的研究状况。     

谏壁发电厂10号炉电除尘器改造

分析了谏壁发电厂10号炉原电除尘器除尘效率低的原因，介绍了该电除尘器的改造方案及依据。除尘器改造后烟尘排放质量浓度仅为41．5mg／m^3，大大削减了电厂烟尘排放量，增强了企业的发展后劲。     

低浓度臭氧在含钴盐硅胶上的吸附研究

常压下对含钴盐硅胶进行低浓度臭氧的吸附实验，吸附达到饱和后用氮气作为载气加热解吸。结果显示，含钴盐的硅胶对臭氧具有较强的吸附能力；臭氧解吸量随着解吸温度的上升而增加；吸附了臭氧的含钴硅胶粒子在常温(313．15K)下可在60min内不问断解吸出臭氧。     

聚合硅酸硫酸铝铁的制备与应用

在n(Fe A1)／n(Si)为0．5～1．0、n(Al)／n(Fe)为2．5～3．0、SiO2质量分数为2．3％、硅酸钠溶液的活化pH为5．5、硅酸钠溶液的活化时间为12min或SiO2的质量分数为2．0％、硅酸钠溶液的活化pH为6．0、硅酸钠溶液的活化时间为3min的条件下，制备出的聚合硅酸硫酸铝铁对废水的除浊效果最佳，除浊率大于98％。     

Stabilization and utilization of hospital waste as road and asphalt aggregate

This article reports the operational results of the effective utilization of hospital waste molten slag produced using a high-temperature melting system, and being operated at a hospital in Selangor, Malaysia. The hospital waste is incinerated and subsequently melted at 1200°C. Scanning election microscope (SEM)/EDX results showed that the slag produced after melting contained amounts of SiO₂, CaO, and Al₂O₃ in excess of 53%, 9%, and 16%, respectively. The results from a leaching analysis on the slag produced proved that the melting process had successfully stabilized the heavy metals. The use of this slag as an alternative material to replace conventional aggregates for road construction was studied. The results from aggregate and asphalt mix tests showed that the slag produced fulfills all the requirements of an alternative aggregate. The average asphalt content, or the optimum asphalt content to be mixed with hospital waste molten slag, was found to be about 5.53%.     

Rapid amino acid cycling in arctic and antarctic soils

Amino acids constitute one of the largest inputs of organic nitrogen (N) to most polar soils and have been hypothesized to be important in regulating vegetational succession and productivity in Arctic ecosystems. Our understanding of amino acid cycling in these soils, however, is poor. The aim of this study was to investigate the size and rate of turnover of the amino acid pool in a range of Arctic and Antarctic soils. Our results indicate that in polar soils with either high or low ornithogenic inputs the amino acid pool is small in comparison to the inorganic N pool (NO^? ₃ and NH⁺ ₄). The free amino acid pool constituted only a small proportion of the total dissolved organic nitrogen (DON) pool in these soils. Here we show that these low concentrations may be due to rapid use by the soil microbial community in both Arctic and Antarctic soils. The turnover of the amino acid pool in soil was extremely rapid, with a half-life ranging from 2 to 24 h, indicating that this N pool can be turned over many hundred times each summer when polar soils are frequently unfrozen. The implications of amino acids in N cycling and plant and microbial nutrition are discussed.     

An automated wet deposition system to compare the effects of reduced and oxidised N on ombrotrophic bog species: Practical considerations

Critical N loads for ombrotrophic bogs, which often contain rare and N-sensitive plants (especially those in lower plant groups: lichens, mosses and liverworts), are based on very few experimental data from measured, low background N deposition areas. Additionally the relative effects of reduced versus oxidised N are largely unknown. This paper describes an automated field exposure system (30 km S. of Edinburgh, Scotland) for treating ombrotrophic bog vegetation with fine droplets of oxidised N (NaNO₃) and reduced N (NH₄Cl). Whim Moss exists in an area of low ambient N deposition (ca. 8 kg N ha^?1 y^?1), the sources and quantification of which are described. The wet N treatment system is run continuously, and is controlled/activated by wind speed and rainfall to provide a unique simulation of “real worl” treatment patterns (no rain=no treatment). Simulated precipitation is supplied at ionic concentrations below 4 mM in rainwater collected on site. Treatments provide a replicated dose response to 16, 32 and 64 kg N ha^?1 y^?1 adjusted for ambient deposition (8 kg N ha^?1 y^?1). The 16 and 64 kg N ha^?1 y^?1 are duplicated with a P+K supplement. Baseline soil chemistry and foliar nutrient status was established for all 44 plots for Calluna vulgaris, Sphagnum capillifolium, Hypnum jutlandicum and Cladonia portentosa.     

Detecting the signal of atmospheric N deposition in recent national-scale vegetation change across Britain

Model estimates of NO_y and NH_x deposition across Britain for 1996 (5 km square resolution) were applied as explanatory variables to account for national-scale, fine-grained changes in plant species composition between 1990 and 1998. Plant species data were recorded from up to 27 fixed plots located within a stratified random sample of 596 1 km². The response variable was a cover-weighted Ellenberg fertility score for each plot. Analyses were carried out separately for woodlands, semi-natural grasslands and heaths/bogs. Most of the variation in the botanical response variable occurred between plots within squares and so could not be explained by the model deposition data. NH_x deposition estimates accounted for significant, but small components of between 1 km² variation in the change in Ellenberg score in grasslands (5.6%) and heath/bogs (9.8%) but not woodlands. NO_y deposition estimates were not significantly associated with vegetation change. Linear models provided the best fit and the slope of the relationship was lower for heath/bogs than grasslands. Further signal attribution at sub-kilometre square scales requires the development of fine-grained models of N deposition that can be generalised across regional sampling domains.