title: Evaluation of modified clay coagulant for sewage treatment.
abstract: The use of modified clays as coagulants for sewage treatment was investigated in this study. The raw clays were montmorillonites K10 and KSF, and were modified by polymeric Al or Fe and/or Al/Fe mixing polymeric species. The comparative performance of modified clays and aluminium sulphate and ferric sulphate were evaluated in terms of the removal of turbidity, suspended solids, UV(254)-abs, colour, and total and soluble CODs. The results demonstrated that after being modified with mixing polymeric Al/Fe species, two montmorillonite clays possess greater properties to remove the particles (as suspended solids) and organic pollutants (as COD and UV(254)-abs) from the sewage and to enhance the particle settling rate significantly.
authors.affiliation: School of Engineering (C5), University of Surrey, Guildford, Surrey GU2 7XH, UK. J.Jiang@surrey.ac.uk
authors.forename: Jia-Qian
authors.initials: JQ
authors.lastname: Jiang
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Zeng
authors.forename: Pete
authors.initials: P
authors.lastname: Pearce
mesh_terms: D000327:Adsorption; D000534:Alum Compounds / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D005069:Evaluation Studies as Topic; D005290:Ferric Compounds / Q000737:chemistry; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage; D013997:Time Factors
chemical_list: D000534:Alum Compounds; D000538:Aluminum Silicates; D005290:Ferric Compounds; D012722:Sewage; C041524:aluminum sulfate; C024823:ferric sulfate; D000077215:Clay