Water Researches and Technologies Center Borj-Cedria Technopark, BP. 273, 8020, Soliman, Tunisia.
Faculty of Science of Bizerte, 7021, Zarzouna, Bizerte, Tunisia.
Environ Geochem Health. 2018 Aug;40(4):1609-1627. doi: 10.1007/s10653-018-0075-2. Epub 2018 Feb 13.
Polycyclic aromatic hydrocarbons are of great concern due to their persistence, bioaccumulation and toxic properties. The occurrence, source and ecological risk assessment of 26 polycyclic aromatic hydrocarbons in industrial and agricultural effluents affecting the Wadi El Bey watershed were investigated by means of gas chromatographic/mass spectrometric analysis (GC/MS). Total PAHs (∑ 26 PAH) ranged from 1.21 to 91.7 µg/L. The 4- and 5-ring compounds were the principal PAHs detected in most of 5 sites examined. Diagnostic concentration ratios and molecular indices were performed to identify the PAH sources. Results show that PAHs could originate from petrogenic, pyrolytic and mixed sources. According to the ecotoxicological assessment, the potential risk associated with PAHs affecting agricultural and industrial effluents ranged from moderate to high for both aquatic ecosystem and human health. The toxic equivalency factor (TEF) approach indicated that benzo[a]pyrene and benz[a]anthracene were the principal responsible for carcinogenic power of samples.
多环芳烃因其持久性、生物累积性和毒性而受到极大关注。本研究采用气相色谱/质谱分析(GC/MS)方法,调查了影响瓦迪拜流域的工业和农业废水中 26 种多环芳烃的发生、来源和生态风险评估。总多环芳烃(∑26 种多环芳烃)的浓度范围为 1.21 至 91.7μg/L。在所检测的 5 个地点中,大多数地点主要检测到 4 环和 5 环化合物。通过诊断浓度比和分子指数来确定多环芳烃的来源。结果表明,多环芳烃可能来自于石油源、热解源和混合源。根据生态毒理学评估,受多环芳烃影响的农业和工业废水对水生生态系统和人类健康的潜在风险从中等到高不等。毒性等效因子(TEF)方法表明,苯并[a]芘和苯并[a]蒽是导致样品致癌能力的主要因素。