Effects of combined polystyrene nanoplastics and ibuprofen on the activated sludge processes: Short-term exposure in pure cultures versus long-term stress in mixed communities - Daying Chen; Mengxiao Li; Yang Li; Sha Long; Ximing Sun; Hongzhi Geng; Meilin Yin; Yongkui Yang; Lin Zhao (Journal of Water Process Engineering, 2024)