Abstract
Clay minerals and iron oxide usually coexist in soil. This work revealed the effect of the interaction between halloysite (HNTs) and hematite on the environmental fate of organic pollutants. Methylene blue (MB) was used as a probe molecule to investigate the effect of this interaction on the adsorption and degradation of MB in the presence of H2O2. The experimental results showed that the presence of hematite changed the Zeta potential of HNTs and weakened the adsorption capacity of HNTs to MB, but the existence of HNTs improved the dispersion of hematite and hence enhanced the performance for activating H2O2 to degrade MB. The adsorption and degradation of other organic pollutants (e.g. 2,4-dichlorophenol, phenol, sulfadiazine, sodium) were similar to MB. The hydroxyl radicals (·OH) were the dominant reactive species confirmed by quantitative experiments, radical scavenging studies and ESR spectra. In addition, with the participation of hematite, the adsorbed methylene blue on the halloysite surface was also removed via activating H2O2. Consequently, these findings are of significance to understand the migration, enrichment, degradation of organic pollutions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
