Pollution Characteristics and Risk Assessment of Typical Antibiotics and Persistent Organic Pollutants in Reservoir Water Sources

The major task of Chinese water governance has gradually shifted away from environment protection to ecology remediation, and the trace organic pollutants, including persistent pollutants antibiotics, attracted growing concern. present study examined seasonal distribution sources typical antibiotics in six representative lower reaches Yangtze River, as well their ecological risk environment. Six surface sediment samples were collected at different time intervals, i.e., December 2018, March 2019, June concentrations nineteen organochlorine pesticides (OCPs), seventeen polychlorinated biphenyls (PCBs), eight polybrominated diphenyl ethers (PBDEs) analyzed by GC-MS. findings are listed below: ? Endosulfan sulfate, Beta-endosulfan, methoxychlor (POPs) detected sediments Gaoyou Lake, Gonghu Gehu with ranging 9.0 10.6 ng/g. ? target relatively low levels. Occurrences sulfonamide NF~37.4 ng·L?1 NF~47.3 ng·g?1. Concentrations quinolone two media NF~5.3 ng·L?1, 0.4~32.5 ? combined toxicity (risk quotient, RQ) Lake was 0.18, which a moderate level. There no obvious most affected POPs. However, there certain risks Sanjiangying, induced OCPs PCBs. This provides scientific basis for treatment reservoir sources.