该研究评估了Chanomi Creek中多环芳烃（PAHs）、苯、甲苯、乙苯和二甲苯（BTEX）以及新兴污染物的水平。在2019年3月至2020年7月之间，采集了沉积物样品，用GC-MS和GC-FID和顶空提取方法评估PAH、BTEX和新兴污染物的浓度。结果显示，平均PAH浓度为22.691 ± 15.09微克/千克。个体PAH的最高浓度为芴（7.085微克/千克）、萘（4.517微克/千克）和菲（3.081微克/千克）。在沉积物中发现了一种称为吡咯（0.828微克/千克）的新环境毒素，具有类二恶英毒性和广泛的分布。最常见的PAH（占25%）是乙苯，其次是甲苯、邻、间二甲苯（占21%）和苯（占13%）。诊断比的分析显示，造成研究区域中PAH存在的主要因素是生活用火木、工业活动排放、灌木燃烧和石油浮油。风险评估表明，大多数PAH超过了允许的风险商数值，表明存在中到高生态风险。然而，PAH和BTEX的皮肤暴露对人体健康的影响较小，成年人和儿童中未发现明显的危害。然而，该研究发现两个年龄组中PAH和BTEX化合物与低癌症风险相关。持续排放PAH和BTEX化合物到Chanomi Creek可能对人类和水生生物健康产生重要的长期负面影响。因此，污染风险意识计划和建立针对已识别污染物的严格背景阈值可能会增强环境和公共卫生保护。© 2023年作者，独家许可给Springer Nature Switzerland AG。

This study assessed the levels of polycyclic aromatic hydrocarbons (PAHs), benzene, toluene, ethylbenzene, and xylene (BTEX), and emerging contaminants in Chanomi Creek. Sediment samples were collected between March 2019 and July 2020 to evaluate the concentrations of PAH, BTEX, and emerging contaminants using GC-MS and GC-FID with Headspace extraction. Results indicated mean PAH concentrations were 22.691 ± 15.09 µg/kg. The highest individual PAH concentrations were fluorene (7.085 µg/kg), naphthalene (4.517 µg/kg), and phenanthrene (3.081 µg/kg). Carbazole (0.828 µg/kg) was discovered as a novel environmental toxin with dioxin-like toxicity and widespread prevalence in sediments. The most common congener (25%) was ethylbenzene, followed by toluene and ortho- and meta-xylene (21%) and benzene (13%). The analysis of diagnostic ratios revealed that the main factors responsible for the presence of PAHs in the study area are the residential use of firewood, emissions from industrial activities, bush burning, and petroleum slicks. The risk assessment indicated that most PAHs exceeded the permissible risk quotient values, suggesting a moderate to high ecological risk. However, cutaneous exposure to PAHs and BTEX was found to have minimal impact on human health, with no significant hazards identified in adults and children. Nevertheless, the study revealed low cancer risks associated with PAH and BTEX compounds for both age groups. The continued discharge of PAHs and BTEX compounds into Chanomi Creek could have significant long-term negative effects on human and aquatic health. Thus, contamination risk awareness programs and the development of stringent contextual thresholds for identified contaminants could enhance environmental and public health protection.© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.