Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail, Bangladesh.
Department of Emergency Management, Patuakhali Science and Technology University, Patuakhali, Bangladesh.
Environ Sci Pollut Res Int. 2021 Oct;28(40):57126-57148. doi: 10.1007/s11356-021-14581-3. Epub 2021 Jun 4.
Anthropogenic activities in and around the urban highways followed by aerodynamic processing generate street dusts, which can cause adverse health effects through different exposure pathways. Hence, considering the high degree of industrialization, concomitant unplanned urbanization, and rapid demographic augmentation, street dust samples from an urban city (Gazipur, Bangladesh) were investigated in terms of potentially toxic elements (using ICP-MS) to evaluate their ecological and health risks. Mean concentrations (± SD) of lead (Pb), copper (Cu), chromium (Cr), cadmium (Cd), zinc (Zn), nickel (Ni), and arsenic (As) in the analyzed air-dried samples were 40.9 ± 13.6, 44.9 ± 15.4, 83.3 ± 19.0, 9.1 ± 5.4, 239.1 ± 34.7, 33.5 ± 10.4, and 2.1 ± 0.8 mg/kg, respectively with heterogeneous distribution which were 0.2 (As) to 82.7 (Cd) times higher than the available internationally recommended limits. Element-specific environmental indices revealed that contamination levels followed the descending order as Cd > Zn > Cu > Pb > Cr > Ni > As, whereas individual ecological risks followed the descending order as Cd > Cu > Pb > Ni > Zn > Cr > As. Sampling site-specific composite indices indicated that sampling sites with high loadings of traffic, population, industrialization, and urbanization were mostly polluted. Multivariate statistical approaches also deduced the similar origins of the studied elements. In terms of the investigated elements, the study site possessed high potential ecological risks, although non-carcinogenic and carcinogenic risks through different pathway's exposures seem insignificant, where children are more vulnerable than adults.
人为活动在城市高速公路内外进行，并伴有空气动力学处理，产生了街道灰尘，这些灰尘可能通过不同的暴露途径对健康产生不利影响。因此，考虑到高度的工业化、伴生的无计划城市化和快速的人口增长，对来自城市（孟加拉国加济布尔）的街道灰尘样本进行了潜在有毒元素（使用 ICP-MS）的研究，以评估其生态和健康风险。分析风干样本中铅（Pb）、铜（Cu）、铬（Cr）、镉（Cd）、锌（Zn）、镍（Ni）和砷（As）的平均浓度（±SD）分别为 40.9±13.6、44.9±15.4、83.3±19.0、9.1±5.4、239.1±34.7、33.5±10.4 和 2.1±0.8mg/kg，分布不均匀，分别是现有国际推荐限值的 0.2（As）到 82.7（Cd）倍。元素特定的环境指数表明，污染水平依次为 Cd>Zn>Cu>Pb>Cr>Ni>As，而个别生态风险依次为 Cd>Cu>Pb>Ni>Zn>Cr>As。特定采样点的综合指数表明，交通、人口、工业化和城市化负荷较高的采样点污染最为严重。多元统计方法还推断出研究元素的相似来源。就所研究的元素而言，尽管通过不同途径的暴露，非致癌和致癌风险似乎并不显著，但研究地点具有很高的潜在生态风险，儿童比成人更容易受到影响。
