臭气强度在恶臭污染物环境空气影响中的应用研究

以兰州某石化公司化工污水处理厂恶臭治理项目为例,在确定恶臭气体的污染源源强的基础上,采用AERMOD模式预测污染物扩散情况。结果表明,添置除臭装置后,NH3的臭气浓度减少了90%,VOCs的臭气浓度减少了88%。同时,当恶臭污染物浓度达到环境质量浓度标准时,NH3的臭气强度为1．40级,VOCs的臭气强度为0．82级,人们仍能感觉到气味。因此石化企业在进行恶臭治理过程中需综合考虑污染物的环境空气质量浓度标准和臭气强度,以期改善环境空气质量。     

Association between population density and infection rate suggests the importance of social distancing and travel restriction in reducing the COVID-19 pandemic

Environmental Science and Pollution Research - Currently, 2019-nCoV has spread to most countries of the world. Understanding the environmental factors that affect the spread of the disease COVID-19...     

The effect of organic solvent washing on the structure of hydrochar-based dissolved organic matters and its potential environmental toxicity

Environmental Science and Pollution Research - With the increased interest in the practical use of hydrochar, concerns about the possible environmental biotoxicity of hydrochar and its released...     

Evaluation of passive sampling of gaseous mercury using different sorbing materials

Environmental Science and Pollution Research - Atmospheric mercury monitoring is essential because of its potential human health and ecological impacts. Current automated monitoring systems include...     

环保竣工验收在环境监测工作中的作用分析

本文论述了环保竣工验收监测工作的法律依据、作用和意义,探讨了建设项目环保竣工验收工作开展的现状。通过加强验收标准建设、严格执行相关法律法规、重视建设项目的环保竣工验收工作的重要意义,积极探索其进一步发展的策略,以促进环保竣工验收工作的顺利开展。     

Economy-wide material input/output and dematerialization analysis of Jilin Province (China)

In this paper, both direct material input (DMI) and domestic processed output (DPO) of Jilin Province in 1990–2006 were calculated and then based on these two indexes, a dematerialization model was established. The main results are summarized as follows: (1) both direct material input and domestic processed output increase at a steady rate during 1990–2006, with average annual growth rates of 4.19% and 2.77%, respectively. (2) The average contribution rate of material input to economic growth is 44%, indicating that the economic growth is visibly extensive. (3) During the studied period, accumulative quantity of material input dematerialization is 11,543 × 10⁴ t and quantity of waste dematerialization is 5,987 ×10⁴ t. Moreover, dematerialization gaps are positive, suggesting that the potential of dematerialization has been well fulfilled. (4) In most years of the analyzed period, especially 2003–2006, the economic system of Jilin Province represents an unsustainable state. The accelerated economic growth relies mostly on excessive resources consumption after the Revitalization Strategy of Northeast China was launched.     

北京地区PM10和PM2.5质量浓度的变化特征

北京市区2003-01-16—04-30PM₁₀和PM2 5的监测结果表明,虽然ρ(PM₁₀),ρ(PM2 5)的变化幅度较大,但是其变化趋势非常相似。PM₁₀,PM2 5质量浓度的日变化呈双峰特征分布。ρ(PM2 5) ρ(PM₁₀)的平均值为56 6%,说明可吸入颗粒物(PM₁₀)中细粒子(PM2 5)的含量大于粗粒子(PM2 5～10)。      

改性膨润土对废水中六价铬的吸附过程研究

以广西宁明膨润土为原料,利用微波干法制备钠化膨润土和有机膨润土,并用制备的改性膨润土对含Cr（Ⅵ）模拟废水进行吸附实验。结果表明,在pH=5．6（为废水初始pH）,加土量为2g／L,吸附时间为30min的条件下,有机膨润土对含50mg／L的Cr（Ⅵ）废水的去除率达95％。有机膨润土吸附Cr（Ⅵ）的机理主要为离子交换吸附及络合物沉淀吸附,钠化膨润土对Cr（Ⅵ）主要为表面吸附。