大气中铅、汞原子荧光光谱技术自动监测设备连续监测应用示范研究

文章通过对大气中铅、汞手工监测与自动监测设备连续监测比对及对自动监测结果有效性评估,对大气中铅、汞原子荧光光谱测量技术自动监测设备的改进提出合理化的意见和建议,以期国产大气中铅、汞原子荧光光谱技术自动监测设备尽快投入环境监测市场应用。     

科技创新 环保卫士——记烟气/大气汞在线监测系统研制与产业化研发团队

<正>近年来,随着我国经济的快速发展,重金属行业进入高速发展期。由于在开采、冶炼、加工过程中,造成不少重金属如铅、汞,镉、钴、砷等进入大气、水体和土壤中,并在环境中长期积累,污染事件时有发生,导致部分地区生态环境呈现恶化趋势。为促进我国重金属污染物检测能力全面提升,推动环境监测技术和环境科学研究等前沿领域     

燃煤电厂大气汞排放在线监测技术运用

目前,我国大气汞污染情况较为严峻,根源以燃煤电厂排放为主,为了维护生态环境与人民群众的身体健康,必须做好燃煤电厂大气汞排放的控制和监测工作。本文以在线监测技术为核心,分析燃煤电厂大气汞排放在线监测技术,构建完善的大气汞排放在线监测系统,实现对大气汞排放的控制,进而为相关研究人员提供一定的借鉴。     

如皋市环境空气变化趋势分析

文章运用最近10年的大气监测数据分析如皋市大气污染特征,指出了影响如皋市环境空气质量的主要污染物及变化趋势。     

廊坊市大气污染变化的特征分析

本文利用廊坊市大气污染物质量浓度的时间序列数据，研究其在时间序列上的周期特性。结果表明，2015—2018年廊坊市空气中主要污染物含量逐渐降低，空气质量指数逐步上升，重污染天数逐渐减少。与2017年相比，2018年可吸入颗粒物(PM₁₀)、细颗粒物(PM_2.5)、SO₂浓度分别下降4.90%、13.33%、21.43%。PM₁₀日均质量浓度以短期震荡为主，季节性变化显著。夏季浓度最低，冬季是一年中污染最严重的季节，存在显著峰值。     

扭转治理水土重金属严重污染的首要举措——记著名环境工程学家、清华大学环境学院傅国伟教授

<正>目前,我国水土重金属严重污染的形势:许多水域中镉、砷、铬、铅、汞的浓度(或含量)超过环境背景值,约有10%以上的土壤巳遭污染,约有10%的市场大米镉超标,一些地方蔬菜、食品中也出现砷、镉、铅超标,人群中出现砷和铅中毒等等。防治重金属污染是十分艰巨的,它涉及许多行业、部门和学科专业,确定防治的基本原则和技术     

大气环境在线监测技术及其应用研究

大气在线监测技术能够准确、全面地反映出大气环境目标污染物的浓度及其变化趋势,从而实现全时段、全方位、动态监测大气要素的目的。因此,本文简要介绍了大气环境在线监测技术,说明了大气环境在线监测系统的整体构架,并结合实际应用提出了大气环境监测质量控制的关键点。     

徐州市空气质量标况数据转实况数据比较研究

2018年8月,我国发布《环境空气质量标准》(GB 3095—2012)修改单,根据修改单,人们需要把污染物的浓度表示方法由标况浓度转换为实况浓度。结合徐州市2018年空气质量自动监测数据,本文介绍了其转换方法,同时比较分析了转换后颗粒物PM2.5和气态污染物O_3-8h的变化。标况转为实况数据后,PM2.5和O_3-8h浓度基本下降,优良天数上升。     

工业遗留地块重金属污染状况评价研究

为了解重庆市某工业遗留地块重金属污染特征及其潜在生态风险，本文在研究区内采集48组土壤样品和18组地下水样品，分析砷、镉、铜、铅、汞、镍、钴、锰8种重金属元素含量特征，并运用内梅罗指数法和潜在生态风险指数法，评价研究区的土壤与地下水污染状况。结果表明，研究区内土壤处于清洁状态，地下水中锰元素严重超标，地下水呈重度污染，存在很强的生态风险。     

城市VOCs变化特征及其对二次有机气溶胶和臭氧的贡献探讨

本文主要在线观测了某城市大气中挥发性有机物(VOCs)的种类和浓度,相关结果表明,芳香烃及烯烃与VOCs的季节变化特征一致,虽然烷烃是VOCs组成中的优势组分,但芳香烃对二次有机气溶胶生成潜势的贡献率最大,烯烃对臭氧生成潜势的贡献率最大。     

The situation in currency markets in the CIS countries in 2009

The situation with currency markets in the CIS countries in 2009 was characterized by considerable fluctuations in national currencies against the background of the major problems in the financial sector, economic recession in most countries, slowing inflation in the consumer market, and deflation in prices of manufactured goods.     

Gender Inequality in Employment in Mozambique

We investigate the gender employment gap in the expanding non‐subsistence sector of the economy in Mozambique, a country still characterized by a large subsistence agricultural sector. We show evidence that the gender gap has widened over time and we identify two structural factors strongly associated with it. One factor is the still relatively lower level of female human capital, with less attained education, as well as literacy and Portuguese proficiency rates. The lower conditional employment probabilities of married women, as compared with men, is the other factor. These findings point at expanding women´s education and facilitating the access of married women to the emerging labour market as the most effective ways of achieving a more inclusive growth path that does not leave women behind.     

Spoorwegen in Europa en in Amerika

Ohne Zusammenfassung     

Women in rural development in Venda

Women frequently constitute the largest section of the adult population in rural communities of developing areas. For this reason, rural development can only take place if women at grassroots level are drawn to the centre of the arena, and their traditional concerns recognised and used as the starting point. In Venda, this approach is showing some positive results.     

Hysteresis in unemployment in the Netherlands

Summary The Dutch labour market situation in the eighties can be characterized by the hysteresis phenomenon, i. e. a rising natural rate of unemployment as a result of the rise of actual unemployment in the past. It appears that the hysteresis phenomenon is more important in The Netherlands than in France and the United States and as relevant as in Germany and the United Kingdom. Because of the steep rise of unemployment in The Netherlands the natural rate of unemployment may have risen more than in Other European countries. As a consequence, the wage depressing effect of the current high unemployment rate has diminished rapidly.I thank J.C. Siebrand, D.P. Broer and C.B. Mulder for helpful comments on an earlier version of this paper.     

五月,黄水林海春正浓千野火棘花似雪

5月,主城气温持续走高,春天的脚步渐远,夏天悄然而至.而此时的石柱黄水春意正浓,在那里,依然可以清晰地聆听到春天的花语,即使在一米阳光之内,也能感受到春天的美丽. 踏青赏花揽春色,风景这边独好 以“万亩森林、万亩石芽、万亩草场、万亩火棘”四大景观著称的千野草场,这时候总是澄澈的蓝天陪衬着悠悠白云,碧绿的草地映衬着逍遥牛羊.这里不但有北国草原的粗犷,亦有南方草地的妩媚.