Sustainable use of longan seed waste as a natural coagulant aid for low-cost and eco-friendly water treatment - Anuwat Aunkham; Vivat Keawdounglek; Wei Chung Sim; Budsakorn Aiyee; Ploypairin Choochan; Phitchayapha Chumueang; Wichuda Intawong; Natcha Thambun; Anantaya Anantaburi; Panadda Klinchan (PLoS ONE, 2026)