Black carbon (BC) along with PM_2.5 (fine particular matters) plays an important role in the assessment health effect of human beings. Winter season campaign measurements carried out for BC concentrations by using 7 different wavelengths such as 370, 470, 520, 590, 660, 880, and 950 nm, handy aethalometer (AE-33, Magee Scientific, USA), at two different locations i.e., National Institute of Technology, Jamshedpur (NIT J) and Sakchi, Jamshedpur (SAK J), in eastern India. During the study period, the mass concentration of BC varies from 4.19 µgm⁻³ to 15.36 µgm⁻³, with an average mean of 8.88 ± 2.40 µgm⁻³ in NIT J and SAK J, the mass concentration of BC varies from 6.3 µgm⁻³ to 13.48 µgm⁻³, with an average mean of 10.29 ± 1.58 µgm⁻³. However, the concentration of PM_2.5 varies from 102.98 µgm⁻³to 198.21 µgm⁻³, with an average mean of 155.82 ± 29.98 µgm⁻³ in NIT J and SAK J, the concentration of PM_2.5 varies from 110.83 µgm⁻³ to 207.65 µgm⁻³, with an average mean of 169.14 ± 22.40 µgm⁻³. It was reported that SAK J has a higher BC concentration compared to NIT J. This was due to heavy traffic load and dense population in SAK J. Backward Trajectories were seen that the airborne particulate matter came from differerajeshnt directions. According to the diagnostic ratio analysis of BC, it was observed that most of the BC mass concentrations come from fossil-fuel (69.70%) followed by wood-burning (30.30%) in a particular place. The overall health risk assessment of BC concentration observed during the study period was 26.70, 13.95, 24.95 and 51.32 at NIT J as well as 32.07, 16.72, 29.95 and 61.87 at SAK J, the passive cigarettes comparable concerning the risk of CVM, LC, LBW, and PLEDSC, respectively.

黑碳（BC）与PM _2.5（细颗粒物）一起在评估人类健康影响方面发挥着重要作用。冬季活动测量使用 7 种不同波长（例如 370、470、520、590、660、880 和 950 nm）、便携式气体浓度计（AE-33，Magee Scientific，美国）在两个不同地点（即，贾姆谢德布尔国立理工学院 (NIT J) 和贾姆谢德布尔萨基 (SAK J)，位于印度东部。研究期间，BC的质量浓度变化范围为4.19 µgm ⁻³至15.36 µgm ⁻³，NIT J和SAK J中BC的质量浓度平均值为8.88 ± 2.40 µgm ⁻³，BC的质量浓度变化范围为6.3 µgm ^{− 3}至13.48 µgm ^-3，平均平均值为10.29 ± 1.58 µgm ^-3。然而，PM _2.5的浓度变化范围为 102.98 µgm ^-3至 198.21 µgm ^-3，平均平均值为 155.82 ± 29.98 µgm ^{-3在 NIT J 和 SAK J 中，PM} _2.5的浓度变化范围为 110.83 µgm ^-3至 207.65 µgm ^-3，平均值为 169.14 ± 22.40 µgm ^-3。据报道，与 NIT J 相比，SAK J 的 BC 浓度较高。这是由于 SAK J 交通繁忙且人口稠密。从向后轨迹可以看出，空气中的颗粒物来自不同的方向。根据BC的诊断率分析，发现BC质量浓度大部分来自化石燃料（69.70%），其次是特定地点的木材燃烧（30.30%）。研究期间观察到的 BC 浓度总体健康风险评估在 NIT J 上为 26.70、13.95、24.95 和 51.32，在 SAK J 上为 32.07、16.72、29.95 和 61.87，被动卷烟的 CVM、LC、分别为 LBW 和 PLEDSC。