高炉煤气洗涤水脱氰研究

氯碱法处理高炉煤气洗涤水,运用正交实验设计方法设计实验,根据直观分析和方差分析方法整理实验数据,得出最佳反应条件,影响因素顺序,显著因素。     

历史让我们在这里沉思:2003年黄河大水灾回眸

2003年是中国历史上不平凡的一年。先是突如其来的“非典”,后是新疆巴楚-伽师、青海德令哈和云南大姚地震。到了7—8月的主汛期,大江大河安澜度过,人们迎着凉凉的秋风,把自然灾害的伤痛留给了历史。     

Bronchial Rn dose survey for residences

The bronchial dosimeter for Rn progeny proposed by Yu and Guan in 1998 was employed to survey the bronchial dose from Rn progeny in 30 residences in Hong Kong. An average bronchial deposition fraction of Rn progeny was obtained as 0.0334, which gave an average dose conversion factor (DCF) of 8.5 mSv WLM-1. The mean values of potential alpha energy concentration (PAEC) deposited in the tracheobronchial region (PAECT-B), total PAEC in air (PAECT), annual effective dose (E), concentration of Rn gas (RC) and annual dose conversion factor (ADCF) for all the residential sites combined were 0.11 +/- 0.05, 3.1 +/- 1.4 mWL, 1.2 +/- 0.5 mSv yr-1, 23 +/- 10 Bq m-3 and 0.055 +/- 0.020 (mSv yr-1 per Bqm-3), respectively, with air-conditioned sites (AC sites) and non-AC sites having significantly different mean ADCF values. The indoor relative humidity affected PAECT and RC with high confidence levels (> 95%).     

中国沿海开放地区工业污染控制的探讨

在环境保护工作由污染问题治现向清洁生产转变过程中，中国沿海开放地区、外资，合资、集体和个体企业在其工业结构中所占比重较大，且要求有良好投资环境，当前控制工业污染，须按社会主义市场经济规律征收资源费和排污费，同时要加强环境规划，建立环境管理系统，有效调工业污原杂源，为保证受损环境得以恢复，须加强环境建设和环境投资。     

建筑施工伤亡事故高发原因分析及对策探讨

随着经济的迅速发展,建筑队伍随之壮大,但伴随而来的建筑施工伤亡事故也迅速增加.建筑施工伤亡事故有三大特点:一是事故高峰出现在夏秋季节;二是高空坠落、触电、起重伤害事故占建筑施工伤亡事故的90%以上;三是违章指挥、违章作业、违反劳动纪律"三违"造成的事故占绝大多数.     

流域农村生活垃圾收运、处理模式探析研究——以巢湖流域为例

流域农村生活垃圾产量大,无害化处理水平低,已成为威胁流域水环境安全的重要因素.以巢湖流域为例,构建了农村生活垃圾收运、处理模式.从技术、经济、环境三方面分析,得出结论：农村“桶装车载直运模式”和“垃圾综合处理模式”可以充分利用现有垃圾处理设施,经村庄收集、乡镇转运,最终实现垃圾减量化、资源化、无害化.     

MES在原油长输管道上的应用

MES是面向执行层的工厂层信息系统,MES作为生产与计划之间的信息纽带,为ERP系统和控制系统提供关键接口,将两者的信息有效连接起来,使整个企业有了一个无缝链接的完整的信息平台。介绍了MES的结构及其在长输管道中的应用,MES是长输管道良好的信息平台。     

三峡库区消落带湿地生态过程及生态安全分析—以开县澎溪河湿地自然保护区为例

三峡库区的生态安全与长江中下游的生态环境问题有着直接关系,同时也涉及整个长江流域的可持续发展。本文从库区蓄水后形成的消落带湿地入手,对三峡库区的国土安全、水安全和生物安全等进行分析。基于以上研究,本文提出一些建议,促使消落带湿地的保护及三峡库区生态安全得以保障。     

高速发展下的丽江旅游产业与水资源环境影响分析

贯穿全城的清澈灵动的水系给丽江带来了别有的韵味,也是所有到过丽江的国内外游客对这个旅游城市至为深刻的印象之一。水资源环境是丽江世界文化遗产及生态地质环境的重要组成部分。本文对丽江的水资源环境与旅游发展进行了辨证分析。通过强化水资源保护与管理,加强综合治理和水环境教育等手段,以协调水资源供需矛盾,有效保护丽江的水资源环境,促进旅游事业与水资源环境之间的和谐发展,为丽江古城世界文化遗产地的可持续发展提供保证。     

Spatial and seasonal variations in bacterial communities of the Yellow Sea by T-RFLP analysis

Four typical coastal sites (rocky shore, sandy shore, mud flat shore, and artificial harbor) at the Yellow Sea were chosen to investigate the spatial and seasonal variations in bacterial communities. This was accomplished by using terminal restriction fragment length polymorphism (T-RFLP) analysis of PCR amplified 16S rDNA fragments. Two kinds of tetrameric restriction enzymes, HhaI and MspI, were used in the experiment to depict the bacterial community diversity in different marine environments. It was found that the community compositions digested by the two enzymes separately were different. However, the results of bacterial community diversity derived from them were similar. The MDA analysis results of T-RFLP profiles coming from HhaI and MspI both exhibited a significant seasonal community shift for bacteria and a relatively low spatial variation among the four locations. With HhaI as the sample, the pair wise T-tests also revealed that variations were minor between each pair of marine environments, with R ranging from 0.198 to 0.349. However, the bacterial community structure in the mud flat site depicted a larger difference than each of the other three sites (R ranging from 0.282 to 0.349).