Adsorption is a promising technology for phosphate removal to alleviate eutrophication. In this study, thermally modified calcium aluminate decahydrate (TCAH) was prepared via low-temperature thermal treatment of calcium aluminate decahydrate (CAH10) to develop a cost-effective and high-performance phosphate adsorbent. The optimal modification temperature was determined to be 120 \u00b0C, which reduced the crystallinity of CAH10, enhanced its porosity, and induced the formation of amorphous calcium aluminate phases. Batch adsorption experiments showed that TCAH exhibited a maximum adsorption capacity of 199.80 mg P\/g at 25 \u00b0C. The adsorption kinetics followed the pseudo-second-order model, while the adsorption isotherms were well fitted by the Redlich-Peterson model. TCAH maintained high removal efficiency over a wide pH range of 3.0-11.0 and showed high selectivity against common coexisting anions. Characterizations using SEM-EDS, XRD, FTIR and XPS suggested that phosphate removal by TCAH was dominated by synergistic amorphous precipitation and inner-sphere complexation. In tests with real phosphorus-releasing liquor derived from excess sludge, TCAH achieved nearly complete phosphate removal at a dosage of 5 g\/L within 6 h. Owing to its readily available raw materials, low preparation temperature, and outstanding phosphate capture performance, TCAH is a promising candidate for efficient phosphate capture and recovery from wastewater.<\/p>\n","protected":false},"excerpt":{"rendered":"
Adsorption is a promising technology for phosphate removal to alleviate eutrophication. In this study, thermally modified calcium aluminate decahydrate (TCAH) was prepared via low-temperature thermal treatment of calcium aluminate decahydrate (CAH10) to develop a cost-effective and high-performance phosphate adsorbent. The optimal modification temperature was determined to be 120 \u00b0C, which reduced the crystallinity of CAH10, […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":[{"type":"user_nicename","value":"Peng Cheng","user_id":"33225"},{"type":"text","value":"Ruixiang Wang","user_id":0},{"type":"user_nicename","value":"Yu Liu","user_id":"35030"},{"type":"text","value":"Yu Shang","user_id":0},{"type":"text","value":"Lei Yang","user_id":0},{"type":"text","value":"Yongxiang 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