Brake wear particulate matter emisions

Article Abstract:

The airborne particulate matter (PM) emission rates for seven nonasbestos brakes (semi-metallic brakes and brakes using potassium titanate fibers or aramid fibers) accounts for, on average, 35% of the brake pad mass loss. The wear rates compare to vehicle emission rates of 5.1-14.1 mg/mi. Of the airborne PM, 86 and 63%, on average, was smaller than 10 mum or 2.5 mum in diameter (PM)(sub 2.5), respectively. Very little inhalable fibers was found in the airborne PM, and 18% of the airborne PM, on average, was carbonaceous materials. Most of the remainder of the mass was accounted for by metallic species along with silicon, phosphorus, sulfur, and chlorine.

Motor vehicle parts and accessories, All Other Miscellaneous Nonmetallic Mineral Product Manufacturing, Auto Brakes, Motor Vehicle Brake System Manufacturing, Asbestos products, Nonmetallic mineral products, not elsewhere classified, Disc Brake Pads, Friction Materials ex Asbestos, Automobile equipment and supplies industry, Automotive parts industry, Mining industry, Illustration, Brakes, Automotive brakes, Mineral industry, Friction materials, Brake pads

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In-use light-duty gasoline vehicle particulate matter emissions on three driving cycles

Article Abstract:

Emissions from light-duty gasoline vehicles using oxygenated and nonoxygenated fuels are examined in detail. Conducted by the Colorado Department of Public Health and Environment in 1998, testing indicated that driving cycle and oxygenated fuels have a significant impact on emissions of particulate matter. Accompanying graphs and charts provide additional statistical data.

Petroleum Refineries, Colorado, Ecological Sciences, Petroleum refining, Gasoline, Environmental sciences, Gasoline research, Colorado. Department of Public Health and Environment

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Particulate emission rates from in-use high-emitting vehicles recruited in Orange County, California

Article Abstract:

Studies reveal that particulate emission rates from light-duty vehicles in Orange County, CA, with a median age of 12.3 years, have substantially decreased over the years. The in-use vehicles that were identified as high hydrocarbon and/or carbon monoxide emitters, repaired and retested during the 1995 South Coast Air Quality Management District program in California yielded an average fleet PM-10 emission rate of 0.138 g/mi and 0.395 g/mi. average emission rate for vehicles that initially emitted visible smoke from the tailpipe.

Waste Management and Remediation Services, Air Pollution Control R&D, Hydrocarbon Pollutants NEC, Carbon Monoxide Pollutants, Automobiles, Air pollution research, Pollution control research, Gaseous pollutants, Hydrocarbon pollutants, Carbon monoxide, Hydrocarbon research, Orange County, California

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