A study was conducted in an underground mine with the objective to assess relative contributions of different types and categories of diesel-powered vehicles to submicron aerosol concentrations and to assess the effectiveness of selected diesel particulate matter control strategies and technologies. The net contributions of each of six heavy-duty (HD) vehicles, five light-duty (LD) vehicles, and the effects of disposable filter elements (DFEs), a sintered metal filter (SMF) system, and repowering were assessed using isolated zone methodology. On average, the HD vehicles powered by engines that were not retrofitted with filtration systems contributed approximately three times more to the number of aerosols and six times more to elemental carbon (EC) mass concentrations than LD vehicles powered by engines that were not retrofitted with filtration systems. Replacing an Environmental Protection Agency (EPA) pre-Tier engine in the non-permissible HD vehicle with an EPA Tier 3 engine resulted in 63% lower EC concentrations and 41% lower aerosol number concentrations. The evaluated filtration system with DFEs reduced the contribution of diesel-powered vehicles to number concentrations of aerosols by 77 to 92% and the average EC concentrations by 95%. The SMF reduced the contribution of diesel-powered vehicles to number concentrations of aerosols and EC concentrations by 93 and 95%, respectively. When compared with older units, one of the newer model personnel carriers contributed noticeably less to EC mass concentrations but almost equally to the number concentrations of diesel aerosols in the mine air. The second newer type of alternative personnel carrier vehicle contributed more to number and EC mass concentrations than the old-style personnel carrier. The LD vehicle powered by an EPA Tier 4f engine equipped with a DPF system contributed least of all tested vehicles to aerosol number and EC mass concentrations. This information is critical to the efforts of the underground mining industry to reduce exposures of workers to diesel aerosols.

中文翻译：

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各种类型和类别的柴油动力车辆对地下矿井中的气溶胶的贡献。

在地下矿井中进行了一项研究，其目的是评估不同类型和类别的柴油动力车辆对亚微米气溶胶浓度的相对贡献，并评估所选柴油机颗粒物控制策略和技术的有效性。使用隔离式评估了六辆重型（HD）车辆，五辆轻型（LD）车辆的净贡献以及一次性滤芯（DFE），烧结金属过滤器（SMF）系统和供电的效果区域方法。一般，与未安装过滤系统的发动机驱动的LD车辆相比，未安装过滤系统的发动机驱动的HD车辆对气溶胶数量的贡献大约高三倍，对元素碳（EC）质量浓度的贡献约为六倍。用EPA Tier 3发动机替换不允许的高清车辆中的环境保护署（EPA）排污发动机，导致EC浓度降低63％，气溶胶浓度降低41％。经过评估的DFE过滤系统使柴油动力车辆对气溶胶数量浓度的贡献降低了77％至92％，对EC的平均浓度降低了95％。SMF将柴油动力车辆对气溶胶浓度和EC浓度的贡献分别降低了93％和95％。与较旧的单位相比，一种新型的人员运输车对EC的质量浓度贡献显着降低，但对矿井空气中柴油气溶胶的数量浓度贡献几乎相等。第二种新型替代人员运输车比老式人员运输车对数量和EC浓度的贡献更大。由配备DPF系统的EPA Tier 4f发动机提供动力的LD车辆在所有测试车辆中对气溶胶数量和EC质量浓度的贡献最小。该信息对于地下采矿行业减少工人暴露于柴油气溶胶的工作至关重要。一种较新型的人员运输车对EC的质量浓度贡献显着减少，但对矿井空气中柴油气溶胶数量浓度的贡献几乎相等。第二种新型替代人员运输车比老式人员运输车对数量和EC浓度的贡献更大。由配备DPF系统的EPA Tier 4f发动机提供动力的LD车辆在所有测试车辆中对气溶胶数量和EC质量浓度的贡献最小。该信息对于地下采矿行业减少工人暴露于柴油气溶胶的工作至关重要。一种较新型的人员运输车对EC的质量浓度贡献显着减少，但对矿井空气中柴油气溶胶数量浓度的贡献几乎相等。第二种新型替代人员运输车比老式人员运输车对数量和EC浓度的贡献更大。由配备DPF系统的EPA Tier 4f发动机提供动力的LD车辆在所有测试车辆中对气溶胶数量和EC质量浓度的贡献最小。该信息对于地下采矿行业减少工人暴露于柴油气溶胶的工作至关重要。由配备DPF系统的EPA Tier 4f发动机提供动力的LD车辆在所有测试车辆中对气溶胶数量和EC质量浓度的贡献最小。该信息对于地下采矿行业减少工人暴露于柴油气溶胶的工作至关重要。由配备DPF系统的EPA Tier 4f发动机提供动力的LD车辆在所有测试车辆中对气溶胶数量和EC质量浓度的贡献最小。该信息对于地下采矿行业减少工人暴露于柴油气溶胶的工作至关重要。