Impact of Humic Acid on the Charge Behavior and Coagulation of TiO2 Nanoparticles Suspension

Feng Gong; Li Zhu Zhang; Li Wang

doi:10.4028/www.scientific.net/AMR.726-731.2384

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 726-731Impact of Humic Acid on the Charge Behavior and...

Impact of Humic Acid on the Charge Behavior and Coagulation of TiO₂ Nanoparticles Suspension

Abstract:

In order to understanding of the fate and transport of TiO₂ nanoparticles (Nps) in the water treatment process, this study focused on the impact of humic acid (HA) on the aggregation and charge behavior of TiO₂ Nps, and investigated the removability of TiO₂ Nps stabilized by HA during the coagulation process. Malvern Zetasizer nanoZS measured the changes of size and zeta potential of HA capped TiO₂ Nps (HA-TiO₂). Uv-vis spectrometer examined the aggregation behavior of TiO₂and HA-TiO₂ NPs at different pH value. Jar tests were conducted to evaluate the removal efficiency of TiO₂ NPs. HA adsorbed on the surface of TiO₂ Nps could decrease the zeta potential values and enhance the stability of TiO₂ Nps. TiO₂ Nps could be effectively removed by aluminum sulfate (AS) under favorable condition. HA could influence the removal of TiO₂ Nps during the coagulation processes. Low concentration of HA rejected the removal efficiency of TiO₂ Nps, however, high concentration of HA promoted removing effectiveness.

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Periodical:

Advanced Materials Research (Volumes 726-731)

Pages:

2384-2388

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.726-731.2384

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Online since:

August 2013

Authors:

Feng Gong, Li Zhu Zhang, Li Wang

Keywords:

Aggregation, Coagulation, Humic Acid (HA), TiO₂

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