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Item Metadata only Co2+-adsorbed chitosan-grafted-poly(acrylic acid) hydrogel as peroxymonosulfate activator for effective dye degradation(2024-04-01) Phonlakan K.; Pornsuwan S.; Nijpanich S.; Budsombat S.; Phonlakan K.; Mahidol University. Moreover, high degradation efficiencies were observed between 95 % and 98 % when tested with other dyes....In this work, chitosan-grafted-poly(acrylic acid) (CS-g-PAA) was synthesized for use as a Co2+ adsorbent and circularly utilized as a peroxymonosulfate (PMS) activator in the degradation of rhodamine B (RhB) dye. CS-g-PAA demonstrated 3.7 timesItem Metadata only Effects of acetate and nitrate ions on radical and intercalation reactions initiated by CuZn hydroxy double salts(2023-06-01) Trakulmututa J.; Uraisin K.; Pornsuwan S.; Smith S.M.; Mahidol University) were produced and treated with aqueous methyl orange (MO), acid red 44 (AR44), or congo red (CR) under ambient conditions. Evidence from dye removal testing, materials analyses, and spin trapping measurements suggested possible three removal processes..., dye sorption, intercalation reactions, and ·OH radicals assisted oxidation for suitable matching between dye and HDS material. Such three processes are responsible for the complete color (from the aqueous 500 ppm MO and AR44) and TOC removal achievedItem Metadata only Zeolitic imidazolate framework-67 in chitosan-grafted hydrogel as an effective catalyst for peroxymonosulfate activation to degrade antibiotics and dyes(2024-11-08) Nachaichot A.; Phonlakan K.; Nijpanich S.; Pornsuwan S.; Budsombat S.; Nachaichot A.; Mahidol Universityin the degradation process. The antibacterial test against E. coli showed that the products of the TC degradation were nontoxic. Additionally, the composite hydrogel was evaluated in the presence of anions and in real water samples. The reusability study showed..., and methylene blue dyes within 30 min.Item Metadata only Rice husk-derived cobalt silica as effective peroxymonosulfate activator for degradation of organic pollutants(2024-08-01) Panawong C.; Chatsri A.; Nachaichot A.; Nanmong T.; Loiha S.; Pornsuwan S.; Nijpanich S.; Mukdasai S.; Budsombat S.; Panawong C.; Mahidol Universitythat SO4• −, HO•, 1O2, and O2• − were produced, with 1O2 being the predominant reactive species. Notably, the catalyst remained effective when tested in actual water environments and could degrade various other dyes and tetracycline. To facilitate catalyst