Technical Paper
Impact of a barium fuel additive on the mutagenicity and polycyclic aromatic hydrocarbon content of diesel exhaust particulate emissions
1988-10-01
881651
This study examines the effects of a barium-based fuel additive on the polycyclic aromatic hydrocarbon (PAH) content and Ames test mutagenic activity of exhaust particulate matter from a diesel engine commonly used in underground mining equipment. The additive, sold for smoke suppression as Lubrizol 565 and containing 20 - 25% barium, was tested at three concentrations in the fuel: 0.75, 1.5 and 3.0 g/liter. A Deutz F6L 912W 6-cylinder, air-cooled, naturally-aspirated, indirect-injection engine was operated on a programmed, light-duty cycle and particulate matter was collected by dilution tunnel sampling using Teflon-coated, glass-fiber filters. At the manufacturer's recommended level of the additive in the fuel, 3.0 g/liter, particulate emissions were elevated 30% for either intake condition (both with p < 0.01).
