2026-06-08T01:18:45Zhttps://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

pH and Particle Structure Effects on Silica Removal by Coagulation Hermosilla Redondo, María Daphne Ordóñez, Ruth Blanco, Laura Fuente González, Elena de la Blanco Suárez, María Ángeles 676 Coagulation Focused beam reflectance Paper mill effluent Reverse osmosis Silica fouling Industria del papel Ingeniería química Medio ambiente 3312.13 Tecnología de la Madera 3303 Ingeniería y Tecnología Químicas 2391 Química Ambiental This is the pre-peer reviewed version of the following article: Hermosilla, D., Ordóñez, R., Blanco, L., de la Fuente, E. and Blanco, Á. (2012), pH and Particle Structure Effects on Silica Removal by Coagulation. Chem. Eng. Technol., 35: 1632–1640. doi: 10.1002/ceat.201100527], which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/ceat.201100527/abstract. 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). European Commission Comunidad de Madrid Ministerio de Ciencia e Innovación (España) Depto. de Ingeniería Química y de Materiales Fac. de Ciencias Químicas TRUE pub 2023-06-20T03:43:41Z 2023-06-20T03:43:41Z 2012 journal article https://hdl.handle.net/20.500.14352/44330 1521-4125 10.1002/ceat.201100527 eng AM AQUAFIT4USE (211534) PROLIPAPEL II-CM (S2009/AMB-1480) AGUA Y ENERGÍA (CTM2008-06886-C02-01) open access application/pdf