2026-05-05T21:09:05Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/576882022-12-12T11:05:31Zcom_10324_1166com_10324_931com_10324_894col_10324_1338

UVaDOC author Hermosilla Redondo, María Daphne author Ordóñez Sanz, Ruth author Blanco, Laura author Fuente González, Elena de la author Blanco Suárez, Ángeles 2022-12-07T13:20:35Z 2022-12-07T13:20:35Z 2012 Chemical Engineering & Technology, 2012, Vol. 35, Nª. 9, pp. 1632-1640 0930-7516 https://uvadoc.uva.es/handle/10324/57688 10.1002/ceat.201100527 1632 9 1640 Chemical Engineering & Technology 35 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 Attribution-NonCommercial-NoDerivatives 4.0 Internacional Papel - Industria Aguas residuales - Depuración y tratamiento Reflectance spectroscopy Reverse osmosis Ingeniería química Química industrial pH and particle structure effects on silica removal by coagulation info:eu-repo/semantics/article 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URL https://uvadoc.uva.es/bitstream/10324/57688/1/pH-and-Particle-Structure-Effects-on-Silica-Removal-by-Coagulation.pdf File MD5 d7554c580083327c4bdd8ad1aac59954 495088 application/pdf pH-and-Particle-Structure-Effects-on-Silica-Removal-by-Coagulation.pdf