Residues of organochlorine pesticides in surface soils from college school yards in Beijing, China

Organochlorine pesticides (OCPs) have been a major environmental issue, attracting much scientific concern because of their nature of toxicity, persistence, and endocrine disrupting effects. Soil samples were collected from ten college school yards in Beijing in 2006 and analyzed to determine fifteen OCPs. Dichlorodiphenyltrichloroethanes (DDTs) were found to be the main pollutants, accounting for 93.70% of total OCPs, followed by hexachlorohexanes (HCHs) (2.25%) and hexachlorobenzene (HCB) (1.82%). Content...     

编组站安全管理考核评价方法探讨

在运用层次分析法和模糊数学的有关原理的基础上,建立基于AHP的模糊多目标综合评价模型,从编组站的安全生产、人身安全、事故防范、干部安全作风4个方面分类,建立共20个二级评价指标,对编组站的安全状况进行分析考核和评价,通过实例验证所提出的理论方法应用于编组站考核评价的可行性,该编组站评价指标体系和评价方法,对考核评价编组站的安全管理状况具有实用价值。     

修造船企业防污染管理浅谈

随着我国修造船企业数量的增加,修造船企业排放的废水污染物、废气污染物和固体废物日益增多,给海洋与江河环境造成了不同程度的影响,对海洋生态环境产生威胁,也危害到人类健康,因此降低修造船企业污染物排放的环境影响,做好企业防污染管理工作的重要性日益凸显出来。就国内修造船企业防污染管理现状,对修造船企业的污染物排放情况进行了阐述,对污染隐患进行了分析,并就修造船企业防污染管理问题提出了几点建议。     

铁道线路通行列车数量与铁路边界噪声关系研究

合理的列车编组数量一直是确保铁路边界噪声达标的重要条件。从噪声控制理论出发,对铁路边界噪声达标前提下,线路上所能允许通过的最大列车编组数量(主要是车厢数量)及鸣笛时间进行了有益的探讨,并提出了可用于直接判定铁路边界噪声达标状况的方法,以及计算铁路边界噪声值的简易公式。     

Risk and consequence analyses of hazardous chemicals in marshalling yards and warehouses at Ikonio/Piraeus harbour, Greece

The risk and the consequences of possible accidents at Ikonio (Piraeus harbour, Greece) are investigated and analyzed in this paper. At this harbour large cargoes of dangerous chemicals (toxic or flammable) are unloaded and stored in warehouses or in marshalling yards. Houses and a school are located near the plant and are directly exposed to danger in the case of an accident. The results were obtained by Breeze Hazard Professional software package, which contains several models for performing consequence modeling through quantitative risk assessment.     

城郊生态过渡带的特点及建设模式(九)——以济南市为例

城郊生态过渡带是一种特殊的过渡类型。以济南市为例,依据生态学原理,在分析了城郊生态过渡带的特点及其环境问题基础上提出了以可持续发展等思想为指导,因地制宜,建设城郊生态园的新型发展模式,促进城郊生态环境的保护和改善。     

An estimate of the contribution of outdoor concrete yards used by livestock to the UK inventories of ammonia, nitrous oxide and methane

Many farms have unroofed concrete yards used by livestock. These concrete yards have received little attention as sources of gaseous emissions. From 1997 to 1999 measurements were made of emissions of ammonia (NH₃), nitrous oxide (N₂O) and methane (CH₄) from 11 concrete yards used by livestock. A postal survey was carried out to assess the areas of yards on farms in England and Wales to enable the measurements to be scaled up to estimate national emissions. Using the results of this study NH₃-N emissions from farm concrete yards were calculated to be ca. 35×10³ t annually. This is 13% of the current estimated total NH₃-N emission from UK livestock. Concrete yards were an insignificant source of N₂O and CH₄ which were both <0.01% of current estimates of agricultural emissions.     

一般工业固体废物堆场污染防控技术研究——以某尾矿库污染截渗工程实践为例

以一座建成多年大型尾矿库为研究对象,对照《一般工业固体废物贮存场、处置场污染控制标准》(GB 18599—2001)及其修订征求意见稿进行环境污染风险分析,经过认真研究,放弃了防渗施工方式,而选择在尾矿库下游合适断面进行截渗处理,通过实施防渗墙工程,并进行跟踪监测,有效控制了尾矿库的渗漏影响,实现了尾矿库下游地表水及地下水的达标修复,为国内一般工业固体废物贮存场、处置场污染控制探索出了一条技术可行、经济合理的解决方案,具有很强的借鉴价值。