Emerging contaminants (ECs) in aquatic environments pose significant risks to biodiversity and ecosystem health, and have garnered widespread attention. The risk ranking and identifying priority control ECs are of crucial for effective water quality management. This study investigated the occurrence and distribution of 102 ECs in the surface water of the Yangtze River estuary and Hangzhou Bay, and conducted risk assessments and priority identification using toxicity-weighted concentration (TWC) and the toxicological priority index (ToxPi). 88 ECs were detected by target analysis, including 42 antibiotics (ANTs), 16 polycyclic aromatic hydrocarbons (PAHs), 14 organochlorine pesticides (OPs), 4 polychlorinated biphenyls (PCBs), tetrabromobisphenol A (TBBPA), 3 hexabromododecanes (HBCDs), 6 polybrominated diphenyl ethers (PBDEs) sample and 2 per- and polyfluoroalkyl substances (PFAS). Risk assessment based on the TWC scheme revealed that 5 ANTs and 4 PAHs posed high risks to aquatic organisms (TWC > 1.0). The ToxPi method effectively integrated detection frequency, concentration, toxicity data, and TWC, providing a ranked list and identifying 12 ECs (5 ANTs, 4 PAHs and 3 OPs) as high priority. This study conducted ecological risk assessment and priority screening of ECs in the Yangtze River estuary and Hangzhou Bay, providing important information for effective management and priority control of ECs.
Liu Fahui,Wang Chuanhua,Liu Xiaoyan,Liang Xia,Wang Qian
This research evaluated the effects of alkyl polyglucoside (APG), an environment-friendly surfactant, on the removal of anthracene (ANT), phenanthrene (PHE), and pyrene (PYR) from the soil cultivated with Scirpus triqueter , an aquatic native pioneer plant in the Yangtze estuarine wetland, China. Soils spiked with about 200 mg kg −1 of ANT, PHE, and PYR were individually irrigated with 0, 10, 20, 30, 40, 50, 100, and 150 mg L −1 of APG. Plant biomass yields, polycyclic aromatic hydrocarbons (PAHs) removal rates, soil microbial, and soil enzyme activities were quantified after 90 days’ cultivation of Scirpus triqueter . Experiments demonstrated that APG has an ability to facilitate PAHs degradation at appropriate concentrations. The highest removal rate of the PAHs was observed in 40 mg L −1 APG treatment, and the removal rates increased 23, 54, and 52 %, respectively, compared to the non-amended control pots. However, the PAHs removal rate decreased to a certain extent when high concentrations of APG were added. The effect on PAHs removal in the soil could be explained by the changed levels of plant biomass, soil microbial populations, and soil enzymatic activity affected by the APG. The results suggested that the use of Scirpus triqueter combined with APG was an effective means for the phytoremediation of the PAH-contaminated soil. At the same time, APG’s optimal concentration should be determined before the application in the PAH-contaminated wetlands.
危险品化学品经营许可证（带存储）