title: Effect of surfactant-coated iron oxide nanoparticles on the effluent water quality from a simulated sequencing batch reactor treating domestic wastewater.
abstract: This study was conducted to evaluate the effect of commercially available engineered iron oxide nanoparticles coated with a surfactant (ENP(Fe-surf)) on effluent water quality from a lab-scale sequencing batch reactor as a model secondary biological wastewater treatment. Results showed that ~8.7% of ENP(Fe-surf) applied were present in the effluent stream. The stable presence of ENP(Fe-surf) was confirmed by analyzing the mean particle diameter and iron concentration in the effluent. Consequently, aqueous ENP(Fe-surf) deteriorated the effluent water quality at a statistically significant level (p < 0.05) with respect to soluble chemical oxygen demand, turbidity, and apparent color. This implied that ENP(Fe-surf) would be introduced into environmental receptors through the treated effluent and could potentially impact them.
authors.affiliation: Department of Civil Engineering, University of Puerto Rico, Mayaguez, PR 00681, Puerto Rico. sangchul.hwang@upr.edu
authors.forename: Sangchul
authors.initials: S
authors.lastname: Hwang
authors.forename: Diana
authors.initials: D
authors.lastname: Martinez
authors.forename: Priscilla
authors.initials: P
authors.lastname: Perez
authors.forename: Carlos
authors.initials: C
authors.lastname: Rinaldi
mesh_terms: D000327:Adsorption; D019149:Bioreactors; D005290:Ferric Compounds / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010316:Particle Size; D013501:Surface-Active Agents / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*; D060753:Water Quality
chemical_list: D005290:Ferric Compounds; D013501:Surface-Active Agents; C000499:ferric oxide