Cascaded floatation of mixed waste polyesters based on a hydrophilic gradient induced by methanol, ethanol, and ethanolamine modification - Bingke Tian; Chaofeng Huang; Yingshuang Zhang; Cong li; Hongru Jiang; Chongqing Wang; Hui Wang; Shangbo Zhang; Liuchuang Zhao (Journal of Environmental Chemical Engineering, 2025)