School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet Road, Hanoi, Vietnam.
Research Center for Environmental Quality Management, Graduate School of Engineering, Kyoto University, 1-2 Yumihama, Otsu, Shiga, 520-0811, Japan.
Environ Sci Pollut Res Int. 2021 Mar;28(10):12082-12091. doi: 10.1007/s11356-020-09195-0. Epub 2020 May 26.
This study evaluated the occurrence of PPCPs in Cau River (Vietnam). Surface water and sediment samples were collected to determine PPCP concentrations. The analysis results showed the presence of 36 out of 56 investigated PPCPs in samples. The total concentration of PPCPs in water samples ranged from 8.21 to 529 ng/L and the value observed in sediment was from 17.4 to 172.8 μg/kg. Along the Cau River, there was a trend of accumulation of PPCPs at the downstream. The highest level of PPCP was observed after the river flows through Thai Nguyen and Bac Ninh provinces. Among detected PPCPs, the ones detected with high frequency (over 70%) and high concentration were caffeine, sulfamethoxazole, and lincomycin in water and triclocarban, levofloxacin, and griseofulvin in sediment. The water-sediment partition coefficient (K) was estimated to explore the fate of PPCP in the river, and the observed K mean values for lincomycin, sulfamethoxazole, and griseofulvin were 223.0, 7.6, and 997.0 kg/L, respectively. Risk assessment was initially conducted by applying a semi-quantitative assessment risk quotient (RQ); the potential ecological risk to the aquatic organism of PPCPs posed a moderate risk.
本研究评估了越南考河（Cau River）中 PPCPs 的存在情况。采集了地表水和沉积物样本，以确定 PPCP 的浓度。分析结果表明，在所调查的 56 种 PPCPs 中有 36 种存在于样本中。水样中 PPCPs 的总浓度范围为 8.21 至 529ng/L，沉积物中的浓度范围为 17.4 至 172.8μg/kg。沿着考河，PPCPs 在下游有积累的趋势。在河流流经太原省和北宁省后，观察到 PPCP 的最高水平。在所检测到的 PPCPs 中，在水中检测到的高频率（超过 70%）和高浓度的有咖啡因、磺胺甲恶唑和林可霉素，在沉积物中检测到的有三氯生、左氧氟沙星和灰黄霉素。通过估计水-沉积物分配系数（K）来探索 PPCP 在河流中的归宿，林可霉素、磺胺甲恶唑和灰黄霉素的观察到的 K 平均值分别为 223.0、7.6 和 997.0kg/L。最初通过应用半定量评估风险商数（RQ）进行风险评估；PPCPs 对水生生物的潜在生态风险构成中等风险。
