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Biodiesel exhaust: The need for a systematic approach to health effects research

机译：生物柴油废气：对健康影响研究需要系统的方法

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Biodiesel is a generic term for fuel that can be made from virtually any plant or animal oil via transesterification of triglycerides with an alcohol (and usually a catalyst). Biodiesel has received considerable scientific attention in recent years, as it is a renewable resource that is directly able to replace mineral diesel in many engines. Additionally, some countries have mandated a minimum biodiesel content in all diesel fuel sold on environmental grounds. When combusted, biodiesel produces exhaust emissions containing particulate matter, adsorbed chemicals and a range of gases. In many cases, absolute amounts of these pollutants are lower in biodiesel exhaust compared with mineral diesel exhaust, leading to speculation that biodiesel exhaust may be less harmful to health. Additionally, engine performance studies show that the concentrations of these pollutants vary significantly depending on the renewable oil used to make the biodiesel and the ratio of biodiesel to mineral diesel in the fuel mix. Given the strategic and legislative push towards the use of biodiesel in many countries, a concerning possibility is that certain biodiesels may produce exhaust emissions that are more harmful to health than others. This variation suggests that a comprehensive, systematic and comparative approach to assessing the potential for a range of different biodiesel exhausts to affect health is urgently required. Such an assessment could inform biodiesel production priorities, drive research and development into new exhaust treatment technologies, and ultimately minimize the health impacts of biodiesel exhaust exposure.
机译：生物柴油是燃料的通用术语，实际上可以通过甘油三酸酯与醇（通常是催化剂）的酯交换反应，由任何植物油或动物油制成。近年来，生物柴油受到了相当大的科学关注，因为它是一种可再生资源，可以直接替代许多发动机中的矿物柴油。另外，一些国家已经强制要求以环境为由出售的所有柴油中的最低生物柴油含量。燃烧时，生物柴油会产生废气排放物，其中包含颗粒物，吸附的化学物质和多种气体。在许多情况下，与矿物柴油废气相比，生物柴油废气中这些污染物的绝对含量较低，这导致人们猜测生物柴油废气对健康的危害较小。此外，发动机性能研究表明，这些污染物的浓度差异很大，具体取决于用于制造生物柴油的可再生油以及燃料混合物中生物柴油与矿物柴油的比例。考虑到许多国家在战略和立法上推动生物柴油的使用，一个令人担忧的可能性是某些生物柴油可能产生的废气排放对健康的危害要大于其他。这种变化表明，迫切需要一种全面，系统和比较性的方法来评估一系列不同生物柴油废气影响健康的潜力。这样的评估可以为生物柴油生产的优先事项提供信息，推动对新的废气处理技术的研究和开发，并最终最小化生物柴油废气暴露对健康的影响。

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