Appraisal of polycyclic aromatic hydrocarbons (PAHs) in indoor dust of Eastern Nigeria and its implications in the COVID-19 years

IF 5.4 Q2 ENGINEERING, ENVIRONMENTAL
Chideraa Courage Offor, John Kanayochukwu Nduka
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Abstract

The risk assessment of PAHs in settled indoor dusts from different localities of Awka, Ekwulobia, and Rumuodomaya–Ogale, Eastern Nigeria, were investigated. Settled dust samples (n = 144) were collected from the windows and floor using brush and analyzed for PAHs with GC- FID. Dust from the windows showed higher total PAHs concentrations than the floor in the order; Rumuodomaya–Ogale > Ekwulobia > Awka. The 3- and 4-ring PAHs were dominant in the window and floor dust of Awka in all the months, while the 3-ring PAHs were the dominant compound in Ekwulobia. The concentrations of total PAH in the window and floor dusts of Ekwulobia, showed a significant difference across the months (p < 0.05). In Rumuodomaya–Ogale, the 3, 4, and 5-ring PAHs supersede in the window and floor dust. This showed that dust is a major sink for 3–5-ring PAHs. The compounds; BaA, DahA, Ant, BaP, and DBA were the major contributors to benzo(a)pyrene as toxicity equivalence (BaPTEQ) values of the window and floor dust. The total incremental life cancer risk was < 1.0 × 10−04 in all the study area; hence, the increased indoor activities during COVID-19 lockdown had no significant cancer effect on human health of the populace.

Abstract Image

评估尼日利亚东部室内灰尘中的多环芳烃(PAHs)及其对 COVID-19 年的影响
研究人员对尼日利亚东部阿卡、埃克乌罗比亚和鲁穆多马亚-奥加勒不同地区的室内沉降尘埃中的多环芳烃进行了风险评估。研究人员用刷子从窗户和地板上收集了沉降尘埃样本(n = 144),并用气相色谱-荧光检测仪分析了其中的多环芳烃。按照 Rumuodomaya-Ogale > Ekwulobia > Awka 的顺序,窗户灰尘中的多环芳烃总浓度高于地板。在所有月份中,阿卡的窗户和地面灰尘中都以 3 环和 4 环多环芳烃为主,而在埃克乌罗比亚,则以 3 环多环芳烃为主。Ekwulobia 窗户和地面灰尘中的总 PAH 浓度在各月之间存在显著差异(p < 0.05)。在 Rumuodomaya-Ogale,窗户和地板灰尘中的 3、4 和 5 环多环芳烃含量最高。这表明,灰尘是 3-5 环 PAHs 的主要来源。BaA、DahA、Ant、BaP 和 DBA 是窗户和地板灰尘中苯并(a)芘毒性当量(BaPTEQ)值的主要来源。在所有研究区域内,总的生命癌症风险增量为 1.0 × 10-04;因此,在 COVID-19 封锁期间增加的室内活动对居民的人体健康没有明显的癌症影响。
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来源期刊
Journal of hazardous materials advances
Journal of hazardous materials advances Environmental Engineering
CiteScore
4.80
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