Abstract
In this study, a modified sodium alginate (MSA) composited with TiCl4 was used to treat the synthetic Ag nanoparticles (AgNPs) water in coagulation-ultrafiltration process. The floc properties and membrane fouling of TiCl4 and MSA composite coagulants (TiCl4 + MSA) were investigated by a laser diffraction instrument and ultrafiltration fouling model. The recycle of the AgNP-containing flocs was evaluated by XRD and photocatalytic experiments. The results showed that TiCl4 + MSA could achieve better coagulation performance than TiCl4 alone with AgNP and DOC removal up to 97 and 59% at the optimum condition (pH = 5 and dosage = 12mg TiCl4/L). TiCl4 + MSA produced larger and looser flocs than TiCl4 and TiCl4 + SA composite coagulant (TiCl4 + SA), which was benefit for the inhibition of subsequence membrane fouling. The strongly attached external fouling resistance (Ref-s) and the reversible internal fouling resistance (Rif-r) of TiCl4 + MSA were only 43 and 39.2% of those achieved by TiCl4 at the optimal coagulation condition. Besides, the adopted AgCl-TiO2 could be recycled from AgNP-containing flocs. And MSA could promote the form of TiO2 anatase. It gives us a possible way for silver nanoparticle recycle.
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.
