2026-06-07T23:45:18Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/443302024-07-04T07:41:32Zcom_20.500.14352_14col_20.500.14352_15

Hermosilla Redondo, María Daphne Ordóñez, Ruth Blanco, Laura Fuente González, Elena de la Blanco Suárez, María Ángeles 2023-06-20T03:43:41Z 2023-06-20T03:43:41Z 2012 1521-4125 10.1002/ceat.201100527 https://hdl.handle.net/20.500.14352/44330 http://doi.org/10.1002/ceat.201100527 Coagulation is presented as an efficient alternative to reduce the silica content in effluents from recovered-paper mills that are intended to be recycled by a final reverse-osmosis (RO) step. Coagulation pretreatment by several polyaluminum chlorides (PACls) or FeCl3 was optimized prior to the RO process. PACls with low alumina content and high basicity achieved almost a 100 % removal of silica at pH 10.5. A good reduction of the silica content was attained without regulating the pH by adding one of these PACls. Silica removal was related to the structure of the produced clots in which cylindrical particles produced higher silica removal. All coagulants removed more than 50 % of the chemical oxygen demand (COD). eng open access pH and Particle Structure Effects on Silica Removal by Coagulation journal article