Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Changes of partitioning and increased root lengths of spruce and beech exposed to ambient pollution concentrations in southern England...
Human activities have a large and important impact on the environment.
Naturally occurring elements or compounds are often concentrated and
redistributed in the environment through industrial processes, power production,
and consumer activity. For example, lead, which is found in
naturally occurring mineral deposits, has become a major pollutant through
its use in batteries, paints, and gasoline additives.
When I first entered the field of environmental monitoring 33 years ago as a new
employee of a then very new U.S. federal agency called the Environmental Protection
Agency, our efforts were concentrated on primarily chasing pollutant residues in the
environment. Eight years later when I founded the international journal
Monitoring and Assessment
that was still certainly the case.
Air pollution has always been a trans-boundary environmental problem and a matter of global concern for past many years. High concentrations of air pollutants due to numerous anthropogenic activities influence the air quality. There are many books on this subject, but the one in front of you will probably help in filling the gaps existing in the area of air quality monitoring, modelling, exposure, health and control, and can be of great help to graduate students professionals and researchers.
Modern urban Air Pollution
"summer" (photochemical) smog:
NO, NO2, CxHy, UV-rad: == O3
(reactions worked out on blackboard)
Winter (cold weather) smog:
fine or ultra-fine particles == health effects
Mixture is different in different cities
Traffic important source
Toxicological mechanism still unknown
Health effects even at low concentrations
(from 40 mg/m3?)
The presentation "Biomass pollution basics" addresses
the basics of biomass burning and introduces participants
to the concept of incomplete combustion, the wide range of
pollutants emitted from wood fires and stoves and typical
pollutant concentrations. Two pollutants are of primary
interest for both health effects and IAP monitoring:
particulate matter (PM) and carbon monoxide (CO).
Smaller particles (PM2.5 and PM1) are likely to be most
harmful, as they penetrate deep into the human lung. Larger
particles are more likely to get 'filtered' by the upper
To obtain the basic information on human exposure to mercury (Hg) due to gold mining activities in North of Viet Nam, total mercury was determined for human hair and blood samples collected from population living in gold mining area. The results indicate that the mercury concentrations measured in 98 blood samples with ranging from 1.128 to 22.751 ppb and 65 hair samples with ranging from 0.379 to 2.440 ppm, the good correlation between concentration of mercury in hair and blood samples was found in people and the ratios of hair Hg to blood hair were 195 for males and 142 for females
Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS
ENVIRONMENTAL CONTROL AND ENERGY CONSERVATION
ENVIRONMENTAL CONTAMINATION ANALYSIS AND PREVENTION 18.2 Recycle Proﬁt Potentials in Municipal Wastes 18.2 Choice of Cleanup Technology for Contaminated Waste Sites 18.4 Cleaning Up a Contaminated Waste Site Via Bioremediation 18.10 Process and Efﬂuent Treatment Plant Cost Estimates by Scale-Up Methods
Work Required to Clean Oil-Polluted Beaches 18.73 Sizing Explosion Vents for Industrial Structures 18.75 Industrial Building Ventilation for Environmental Safety 18.
Since the Second World War, and especially since the publication of Rachel Carson’s
in 1962, there has been growing concern about contamination of the
environment by “man-made” chemicals. These chemicals may be present in industrial
and municipal effluents, in consumer or commercial products, in mine tailings,
in petroleum products, and in gaseous emissions. Some chemicals such as pesticides
may be specifically designed to kill biota present in natural or agricultural ecosystems.
They may be organic, inorganic, metallic, or radioactive in nature.
Air pollution has been a major transboundary problem and a matter of global concern for decades. High concentrations of different air pollutants are particularly harmful to large cities residents, where numerous anthropogenic activities strongly influence the quality of air. Although there are many books on the subject, the one in front of you will hopefully fulfill some of the gaps in the area of air quality monitoring and modeling, and be of help to graduate students, professionals and researchers....
Membrane separation has developed into an important technology for separating VOCs and other gaseous air pollutants from gas streams during the past 15 years. The ﬁrst commercial application was installed in 1990, and more than 50 systems have been installed in the chemical process industry worldwide.1 The technology utilizes a polymeric membrane that is more permeable to condensable organic vapors, such as C3+ hydrocarbons and aromatics, than it is to noncondensable gases such as methane, ethane, nitrogen, and hydrogen.
This book on Environmental Technology takes a look at issues such as air, soil and noise pollution problems, environmental quality assessment, monitoring, modelling and risk as- sessment, environmental health impact assessment, environmental management and envi- ronmental technology development. It represents institutional arrangements, financial mechanisms and some sustainable technologies. The user can always count on finding both introductory material and more specific material based on national interests and problems.
Human beings need to breathe oxygen diluted in certain quantity of inert gas for living. In the atmosphere, there is a gas mixture of, mainly, oxygen and nitrogen, in appropriate proportions. However, the air also contains other gases, vapours and aerosols that humans incorporate when breathing and whose composition and concentration vary spatially. Some of these are physiologically inert. Air pollution has become a problem of major concern in the last few decades as it has caused negative effects on human health, nature and properties....
When planning how to reduce the threat of global warming and how to adapt to it, a
very important piece of information is how intense the change will be. That implies
estimating the trends of future concentrations of greenhouse gasses, and the potential
future changes in temperature, precipitation, storm events and other climatic
variables. These predictions are important not only to estimate the magnitude of the
changes, but also to determine the uncertainty surrounding them.
Lichens have been used to study air pollution chemistry in national parks and forests since the 1980s
(Figures 1 and 2). There have also been a few lichen studies on national wildlife refuges. Most of the
studies have been floristic studies, reports of baseline concentrations of elements in lichen tissues and,
occasionally, trends in these concentrations. Figure 1 shows park and refuge locations with tissue
chemistry data. USGS Biological Resources Division maintains a web site listing lichens known from each
of the national parks shown on the map (http://www.ies.wisc.
The current study was undertaken in a new manufactured house set up as a research
facility. The plan was to conduct longitudinal measurements of VOC concentrations in the
house along with measurements of key physical parameters including house air change rate,
indoor and outdoor temperature and relative humidity, and wind conditions over a period of
approximately one year. The primary objective was to evaluate changes in the emissions of
formaldehyde and other VOCs in response to time, house air change rate, and the other
Edwards et al (2006) report indoor air quality monitoring in nearly 400 households in the
three provinces of Hubei, Shaanxi, and Zhejiang in 2002-2003. Great care was taken to
select homes that reflect the diversity of fuels and stove technology and stove
performance in China. PM4 concentrations in 75 percent of kitchens and 73 percent of
living rooms during the winter - and 48 percent of kitchens and 46 percent of living
rooms during the summer - exceeded the national indoor air quality PM10 standard of 150
for a 24 hour average. If PM10...
Patterns of particle emission are different from those of the other pollutants included in the first phase of
the EU Framework Directive because of their extreme diversity of origin and source, both primary and
secondary, natural and anthropogenic, and there are significant differences in levels between Member
States and regions within states.
The limited amount of reliable PM10 data makes it difficult to establish a comprehensive overview of
PM10 concentrations and trends in Member States.
The available data does, however, suggest that present PM10 values exceed the recommended limit values
in the majority of Member States. In future projections, planned actions should be taken into
consideration. These include the SOx and NOx Protocols within UNECE and the Auto-Oil programme.
Abatement policies for other pollutants will also have an impact.