National Centre for Environmental Technology (NCET), Life Science & Environment Research Institute (LSERI), King Abdulaziz City for Science & Technology (KACST), Riyadh 12354, Saudi Arabia.
Int J Environ Res Public Health. 2022 Apr 30;19(9):5474. doi: 10.3390/ijerph19095474.
Mangroves are known as a naturally based solution for climate mitigation and adaptation. Mangroves are at a potential risk of degradation by contaminants such as polycyclic aromatic hydrocarbons (PAHs). In this study, sixteen priority PAHs were analyzed and characterized in forty samples of mangrove seawater and mangrove sediments collected from two coastal areas (i.e., Sharm and Khor Rabigh) along the Red Sea Coast of Rabigh city in August 2013. We found that the average concentration of total PAH in mangrove sediments in the Sharam area (22.09 ng/kg) was higher than that in the Alkhor area (6.51 ng/kg). However, the average concentration of the total PAH in the mangrove seawater in the Alkhor area (9.19 ng/L) was double that in the Sharam area (4.33 ng/L). Phenanthrene and pyrene were the major components in both the mangrove seawater and sediment in all the investigated areas. We observed that the abundance of PAHs with 2-3 aromatic rings was dominant in sediment samples collected from both study areas. This abundance was also observed in seawater from the Sharam area. However, seawater samples from the Alkhor area had abundant PAHs with four aromatic rings. The majority of PAHs in sediment samples of both study areas originated from petrogenic sources, whereas the majority of PAHs in seawater samples originated from pyrogenic sources.
红树林被认为是一种应对气候减缓和适应的自然解决方案。红树林可能会受到多环芳烃（PAHs）等污染物的退化威胁。本研究于 2013 年 8 月在沙特阿拉伯 Rabigh 市红海沿岸的两个沿海地区（即 Sharm 和 Khor Rabigh）采集了 40 个红树林海水和红树林沉积物样本，分析并鉴定了其中的 16 种优先 PAHs。结果表明，Sharam 地区红树林沉积物中总多环芳烃的平均浓度（22.09ng/kg）高于 Alkhor 地区（6.51ng/kg）。然而，Alkhor 地区红树林海水中总多环芳烃的平均浓度（9.19ng/L）是 Sharam 地区的两倍（4.33ng/L）。在所有研究区域的红树林海水和沉积物中，菲和芘都是主要成分。我们观察到，在所研究的两个地区的沉积物样本中，具有 2-3 个芳香环的多环芳烃丰度占优势。在 Sharam 地区的海水中也观察到了这种丰度。然而，Alkhor 地区的海水中富含四环多环芳烃。两个研究区域沉积物样本中的大多数多环芳烃源自于石油源，而海水样本中的大多数多环芳烃源自于高温源。
