TY - Front. Environ. Sci. Eng. A1 - Peng Hu, Changsheng Guo, Yan Zhang, Jiapei Lv, Yuan Zhang, Jian Xu T1 - Occurrence, distribution and risk assessment of abused drugs and their metabolites in a typical urban river in north China Y1 - 2019-08-15 JF - Frontiers of Environmental Science & Engineering JO - Front. Environ. Sci. Eng. SP - 56 EP - VL - 13 IS - 4 UR - https://journal.hep.com.cn/fese N1 - 10.1007/s11783-019-1140-5 ER -