RT info:eu-repo/semantics/article
T1 pH and particle structure effects on silica removal by coagulation
A1 Hermosilla Redondo, María Daphne
A1 Ordóñez Sanz, Ruth
A1 Blanco, Laura
A1 Fuente González, Elena de la
A1 Blanco Suárez, Ángeles
K1 Papel - Industria
K1 Aguas residuales - Depuración y tratamiento
K1 Reflectance spectroscopy
K1 Reverse osmosis
K1 Ingeniería química
K1 Química industrial
K1 Coagulation
K1 Silica fouling
AB 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).
PB John Wiley & Sons
SN 0930-7516
YR 2012
FD 2012
LK https://uvadoc.uva.es/handle/10324/57688
UL https://uvadoc.uva.es/handle/10324/57688
LA eng
NO Chemical Engineering & Technology, 2012,  Vol. 35, Nª. 9, pp. 1632-1640
NO Producción Científica
DS UVaDOC
RD 08-ene-2025