title: Remediation and toxicity removal from Kraft E1 paper mill effluent by ozonization.
abstract: The degradation of Kraft E1 pulp mill effluent was studied by four different ozonization oxidation systems (O3/pH3, O3/pH11, O3/pH11/H2O2, O3/pH11/UV). The investigation was focused on the reduction of total organic carbon (TOC), total phenols, color and acute toxicity (monitoring by inhibition of Escherichia coli respiration). For a reaction time of 90 minutes, the O3/pH11/UV was the most effective process for decoloration (45%). The O3/pH11/H2O2, O3/pH11/UV and O3/pH11 processes showed the best results for total phenols reduction (approximately/= 90%). None of the studied processes showed a significant TOC reduction. The O3/pH11/UV and O3/pH11 processes were effective for the acute toxicity reduction. Different kinetic parameters were also determined in order to quantify the reactivity of the effluent towards the applied oxidation systems.
authors.affiliation: Biological Chemistry Laboratory - Instituto de Química, Universidade Estadual de Campinas UNICAMP, Campinas/SP, Brazil.
authors.forename: R S
authors.initials: RS
authors.lastname: Freire
authors.forename: L T
authors.initials: LT
authors.lastname: Kubota
authors.forename: N
authors.initials: N
authors.lastname: Durán
mesh_terms: D001681:Biological Assay; D002244:Carbon / Q000737:chemistry; D004926:Escherichia coli / Q000502:physiology; D007220:Industrial Waste; D007700:Kinetics; D010083:Oxidants, Photochemical / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D014876:Water Pollution / Q000517:prevention & control*; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D010083:Oxidants, Photochemical; D010636:Phenols; D010126:Ozone; D002244:Carbon