Catalysis and Automotive Pollution Control by A. Crucq

By A. Crucq

In June 1984 the EEC fee proposed new criteria of permissible exhaust fuel from motorcars to be brought in Europe; those criteria have been authorized by way of the Ministers of our environment 12 months later. because the keep an eye on of car toxins is at the moment quite often a catalytic challenge, it used to be determined to carry a global Symposium at the topic, and an organizing committee composed of individuals engaged in catalytic examine within the diverse Belgian Universities was once constituted. This was once the 1st Symposium of its variety to be hung on a global point, and the standard and clinical curiosity of the papers provided was once unparalleled. it truly is deliberate to carry a follow-up Symposium in 2 to three years' time. the 1st a part of the booklet is a normal advent to the matter of automobile toxins. the second one, effectively catalytic, half is dedicated to primary and utilized reviews on toxins keep watch over, with emphasis on exhaust catalytic converters.

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5. Particles A large number of extremely fine particles are emitted from automobile exhaust systems, with approximately 70 percent in the size range of 0,02 to 0,06 micron. These particles consist of the both inorganic and organic compounds of high molecular weight. The quantity of solid and droplet material produced in the exhaust amounts to a few milligrams per gram of gasoline burned (Rose 1962). 0 I Most gasoline contain lead additives, which provide the antiknock characteristics that are required by present-day high compression engines.

These oxidants, obtained by photochemical reactions in the atmosphere, may be involved in the widespread dieback and decline of forests in both Europe and North America. The 03 and photooxidants theory, and its influence on acid deposition, will be shortly presented and discussed. Heavy metals contamination of soil, water and plant materials, near highways is well known, and there's a trend to accelerate the reduction of lead addition in the fuels. The vicinity of heavy traffic roads, is a source for important troubles to terrestrial and aquatic ecosystems.

306:367 ,1982 A. Crucq and A. , Amsterdam - Printed in The Netherlands AUTOMOTIVE TRAFFIC Risks for the Environment by R. IMPENS Departernent de Biologie vegetale, Faculte des Sciences Agronomiques de l'Etat, Gemboux (Belgique) ABSTRACT Automotive traffic generates a lot of air pollutants, some metallic contaminants and causes troubles, not only for the roadside environment but also for the terrestrial and aquatic ecosystems. The exhaust gases of vehicle's engines contain mainly carbon monoxide and dioxide, nitrogen oxides, a few sulfur dioxide, a great number of hydrocarbons, or organic carbon derivates, and some heavy metals particulates.

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