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首页> 外文期刊>Environmental Science & Technology >Emission Factor for Antimony in Brake Abrasion Dusts as One of the Major Atmospheric Antimony Sources
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Emission Factor for Antimony in Brake Abrasion Dusts as One of the Major Atmospheric Antimony Sources

机译：刹车粉尘中锑的排放因子是大气中的主要锑源之一

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Abrasion tests were conducted using a brake dynamometer to determine the antimony (Sb) emission factor originating from automobiles. Abrasion dusts from commercially available brake pads (nonasbestos organic type) were emitted into an enclosed chamber under various braking conditions in terms of initial driving speed and deceleration. Suspended dusts inside the chamber were collected on a quartz fiber filter and weighed. From the experimental data, dust emission could be regressed as a function of the initial kinetic energy loading and the braking time. Using the regression function, the emission factors of brake abrasion dusts under the typical braking conditions (initial driving speed; 50 km/h, deceleration; 1.0 m/s~2) were calculated as 5.8 mg/braking/car for PM_(10) and 3.9 mg/braking/car for PM_(2.5). The elemental composition of the collected dusts indicated that the fraction originating from disk wear contributed to approximately 30% of the suspended dusts. From these analytical results, it was concluded that the Sb emission factors originating from automobiles were approximately 32 μg Sb/braking/car for PM_(10) and 22 μg Sb/ braking/car for PM_(2.5). These essential data will contribute to the modeling of atmospheric Sb concentration alongside roadways and also to the better understanding of Sb source apportionment.
机译：使用制动测功机进行了磨损测试，以确定源自汽车的锑（Sb）排放因子。在初始驱动速度和减速度方面，在各种制动条件下，市售制动片（非石棉有机类型）的磨屑被排放到密闭室内。室内的悬浮灰尘收集在石英纤维过滤器上并称重。从实验数据来看，粉尘排放可以作为初始动能负荷和制动时间的函数而回归。使用回归函数，对于PM_（10），在典型制动条件下（初始行驶速度; 50 km / h，减速度; 1.0 m / s〜2），制动磨损粉尘的排放因子计算为5.8 mg /制动/汽车。和PM_（2.5）的3.9毫克/制动/汽车。收集到的粉尘的元素组成表明，源自盘磨损的部分占悬浮粉尘的大约30％。从这些分析结果可以得出结论，对于PM_（10），源自汽车的Sb排放因子约为32μgSb /制动/汽车，对于PM_（2.5），其约为22μgSb /制动/汽车。这些基本数据将有助于对沿道路的大气中Sb浓度进行建模，并有助于更好地理解Sb来源分配。

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