Oxides of nitrogen in the greater Manchester conurbation,UK

Summary This paper reviews the emission sources of oxides of nitrogen and provides an estimate of the contribution from the Greater Manchester conurbation. The uncertainty attached to the estimate is large. Atmospheric and rainwater concentrations of oxides of nitrogen are reported from the Greater Manchester Acid Deposition Survey network. The health and ecological implications of these concentrations are commented upon and the measured values compared to a number of environmental guidelines, including recently formulated critical load and critical level estimates. Control technologies applicable to both mobile and large combustion sources are briefly reviewed.Dr James Longhurst is Director of the Acid Rain Information Centre which is based at Manchester Polytechnic.     

rs双区异常与强震中短期预报

本文根据组合模式原理提出了一种用小震调制比（ｒｍ）异常区出现高频次的空间异常图，进行强地震中短期预报的方法，简称ｒｓ法。该方法在预报强震地点和时间上可望取得较好效果。本文在介绍该方法的基础上，应用该法对３次７级以上大震进行了回顾性检验。     

烟气脱硝工艺及其化学反应机理

概述了工业固定源NOx的控制措施，包括燃烧过程控制和燃烧后减少NOx排放。介绍两种主要的烟气脱硝工艺SNCR和SCR的特点、布置及所要求的温度范围，正在商业化应用的SCR工艺的催化荆组成、活性组分及其他组分的作用。提出了这一催化体系中还需要进一步澄清的某些化学机理。     

Characteristics of phosphorus fractionated from the sediment resuspension in abrupt expansion flow experiments

Phosphorous (P) fraction characteristics in sediment resuspension were investigated under adequately hydrodynamic conditions. Four forms of P in overlying water, including dissolved inorganic P, dissolved total P, total P, and particulate P, and six fractions of P in suspended particulate matter (SPM), including loosely sorbed P (NH4Cl-P), redox-sensitive P (BD-P), aluminum-bound P (Al- P), organic P (NaOH-nrP), calcium-bound P (Ca-P) and residual P (Res-P), were quantified, respectively. Di erent hydrodynamic conditions resulted in di erent P form changes. Four states could be ascribed: (1) P desorption by sediment and SPM, and P adsorption by overlying water; (2) P desorption by SPM, and P adsorption by overlying water; (3) P adsorption by SPM, and P desorption by overlying water; and (4) P equilibrium between SPM and overlying water. The contents of P in overlying water acquired peak values in the middle position of the vertical P distribution due to the combined actions of SPM and sediment. P fractions in SPM were in the following order: BD-P > NaOH-nrp > Ca-P > Al-P > Res-P > NH4Cl-P. BD-P in SPM frequently exchanged with P forms in overlying water. Resuspension was favorable to forming Ca-P in SPM.     

GE水煤浆烧嘴安全监控的HAZOP分析

采用危险与可操作性（HAZOP）分析方法,对某个GE水煤浆装置的气化炉烧嘴进行了分析,识别出了烧嘴监测和进料控制中存在的问题。烧嘴监测中存在的问题主要是CO浓度监测和烧嘴压差监测不准;烧嘴进料控制中存在的问题主要是煤浆的流量,浓度测量和氧气的流量测量存在缺陷。针对HAZOP识别出的烧嘴监控问题,提出了改进的措施。     

周界报警系统在大型库区中的应用

随着科学技术的不断发展和社会的进步,防盗报警监控系统正越来越多地被应用于各个领域。输油站库是一个重点防范单位,特别是大型油库,为了更好地管理,有效防止非法入侵及油库的安全,建立一套周界安全防范监控报警系统是非常必要的。     

浅谈中国城市污泥的处置

城市污水污泥的处置已成为目前环境科学研究领域中的重要问题。中国是一个经济基础较为薄弱、可耕地有限的农业大国,而污泥中富含植物生长必须的有机质、腐殖质和矿质元素,其土地利用能改善土壤的理化性质,提高农作物产量,减少污泥对环境的二次污染,从而实现污泥的资源化、无害化、稳定化和减量化处置目标。概述了当前城市污泥处置的几种方法及研究进展,并就中国污泥处理处置和综合利用提出了相关建议。     

灰色理论在预测鱼田堡煤矿矿井涌水量中的应用

煤矿地下水动态的预测预报始终存在着计算过程复杂、计算量大、且难以兼顾影响矿井充水的各种因素、精度较低的特点;灰色系统理论则具有高度的概括性、简单的计算过程和极佳的预测精度,因此在工程界得到了广泛的应用。本文采用灰色系统理论,以灰色理论GM（1,1）模型为基础对重庆鱼田堡煤矿矿井涌水量进行预测。结果表明,该方法在预测矿井涌水量中是一种简便而有效的好方法。根据涌水量预测结果,为矿井设计排水方案的最优化选择提供科学依据。     

温岭市制鞋业污染现状及环境整治对策

温岭市制鞋业由于数量众多,分布密集,生产总量较大,污染防治设施滞后,而被列入台州市8．11环境保护新三年行动计划重点整治行业,但在实施过程中,进度缓慢,步履艰难。为此笔者全面调查了温岭制鞋业空间分布特征、发展趋势、产品结构以及产排污状况,系统地分析了该行业的污染现状,进而剖析成因,提出了切实可行的行业污染环境整治对策。     

实施HAZOP分析控制重大工艺安全事故(Ⅰ)

介绍了危险与可操作性分析（Hazard and Operability,HAZOP）技术的国内外应用现状。结合我国重大工艺安全事故案例,阐述了在我国实施HAZOP的必要性。