关于地震应急救援《防震减灾法》解读

地震应急救援是防震减灾的一个重要环节,对于减轻地震灾害损失具有十分重要的作用。修订后的《防震减灾法》建立和完善了相关法律制度,进一步提升了我国地震应急救援能力。     

安全、美观、环保的PPE——代尔塔不懈的追求

1 立足欧洲,放眼全球 法国代尔塔集团创立于1977年,并于1999年在巴黎股票市场上市.经过30多年的快速发展,代尔塔已经成为一家面向全球的个体防护装备国际级设计制造企业.成为全球领先的个体防护装备的设计者和生产者是代尔塔集团一贯坚持的明确发展目标.这一目标不仅仅是一个简单的口号,而且是代尔塔集团致力于高质量产品生产和服务的一种保证.作为个体防护装备的全球供应商,代尔塔集团是欧洲乃至世界PPE市场上的一股领军力量.     

国内外冷却服的发展现状及关键技术

本文论述了国内外冷却服的发展现状,介绍了3种制冷技术路线,指出了其各自的关键技术,有利于人们对冷却服的发展趋势进一步的了解和认识.     

聚硅氯化铝（PASC）的形态分布及转化规律：Ⅰ.Al—Ferron逐时络合比色？…

采用Ａｌ－Ｆｅｒｒｏｎ逐时络合比色法比较研究了ＰＡＳＣ与ＰＡＣ中铝的形态分布及转化规律。实际结果表明,在ＰＡＳＣ中,由于聚硅酸与铝水解聚合产物的相互作用,使得铝的水解聚合形态分布及转化情况发生了变化。     

A New All Season Passive Sampling System for Monitoring Ozone in Air

A new all season passive sampling system for monitoring O₃ in the atmosphere has been developed in the laboratory and validated in the field. The unique features for this system include a newly designed passive sampler and a rain shelter, which allow the passive sampler to be installed in the field facing downwards. An equation associated with meteorological parameters is used to calculate the passive sampling rates. This system has been extensively tested in the lab (temperature from –18 to 20°C, relative humidity from 13 to 81%, and wind speed from 0.5 to 150 cm/s) and validated in the field in climates of all seasons. The accuracy of the ozone concentrations in the atmosphere obtained with the use of the new passive sampling system was higher than 85% compared to those obtained with continuous ozone analyzers. The new ozone passive sampling system can be used to measure ambient O₃ concentrations ranging from 3 ppb to 1000 ppb based on one-day exposure and 0.1 ppb to 140 ppb for a monthly exposure period. It is also reasonable to conclude that the new passive sampling system can be used for eight-hour exposure study because of the low field blanks and high sampling rates.     

Size and resin fractionations of dissolved organic matter and trihalomethane precursors from four typical source waters in China

Dissolved organic matter (DOM) and its potential to form disinfection by-products (DBPs) during drinking water treatment raise challenges to water quality control. Understanding both chemical and physical characteristics of DOM in source waters is key to better water treatment. In this study, the DOM from four typical source waters in China was fractionated by XAD resin adsorption (RA) and ultrafiltration (UF) techniques. The trihalomethane formation potential (THMFP) of all fractions in the DOM were investigated to reveal the major THM precursors. The fraction distributions of DOM could be related to their geographical origins in a certain extent. The dominant chemical fraction as THM precursors in the DOM from south waters (East-Lake reservoir in Shenzhen and Peal rivers in Guangzhou) was hydrophobic acid (HoA). The size fraction with molecular weight (MW) <1 kDa in both south waters had the highest THMFP. The results of cluster analysis showed that the parameters of fractions including DOC percentage (DOC%), UV₂₅₄%, SUVA₂₅₄ (specific UV₂₅₄ absorbance) and THMFP were better for representing the differences of DOM from the studied waters than specific THMFP (STHMFP). The weak correlation between SUVA₂₅₄ and STHMFP for either size or XAD fractions suggests that whether SUVA₂₅₄ can be used as an indicator for the reactivity of THM formation is highly dependent on the nature of organic matter.     

云阳县生态危机的现状及其对策

为了改善生态环境，发展贫困地区经济，树立人与延期共同，协调发展观念，建立合理的农业结构和作物布局，详述了四川云阳县生态危机的现状和存在问题，提出了保护环境，发展立体农业的合理布局的建议。     

贵州喀斯特地区典型土壤碳酸盐垂直分布特征及其同位素组成研究

以贵州为中心的西南喀斯特地区的石漠化是我国实施西部大开发战略中所面临的根本性地域环境问题之一,喀斯特地区石漠化是一种与脆弱生态背景和人类活动相关联的土地退化过程,而土壤退化是土地退化的核心部分.本研究采集了贵州喀斯特地区的砂岩黄壤剖面和石灰土剖面的土壤样品,测定了剖面样品的土壤有机碳含量、土壤碳酸盐含量和土壤碳酸盐δ1...     

油田钻井废水深度处理技术

采用化学混凝-铁炭微电解-电渗析技术对钻井废水进行了深度处理实验。实验结果表明：废水pH和反应时间是影响铁炭微电解处理效果的重要因素,当废水pH为1．5,反应时间为120min时,COD去除率为50％;在电渗析除Clˉ过程中,采取直流方式出水时,在进水流量为20L／h、操作电压为30V、运行时间为15min的条件下,Clˉ去除率可达75％;而采取循环方式出水时,运行时间是影响电渗析除Clˉ效果的主要因素,当运行时间大于等于60min时,出水中Clˉ的质量浓度低于350mg/L,达到DB51／190-1993（四川省污水排放标准》中的三级排放标准。