Aggregation of TiO2 Nanoparticles in Aqueous Media: Effects of pH, Ferric Ion and Humic Acid

Penghua Wang
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Penghua Wang: Nanyang Environment & Water Research Institute (NEWRI), Nanyang Technological University, Singapore

International Journal of Environmental Sciences & Natural Resources, 2017, vol. 1, issue 5, 157-162

Abstract: The aggregation behavior of TiO2 nanoparticles was investigated through the measurement of aggregate size and zeta potential under the influence of pH, ferric ion and HA. It is of great significance for assessment of the aggregate removal of TiO2 nanoparticles. The point of zero charge (PZC) for TiO2 (P25) nanoparticles in suspension was found to be at about pH 6.2, which increased to around pH 9.0 with the presence of ferric ion (1.0 mM), decreased to less than pH 3.0 with the presence of HA (5.0 mgC/L), and decreased to around pH 4.6 with the presence of both ferric ion (1.0 mM) and HA (5.0 mg C/L).

Keywords: earth and environment journals; environment journals; open access environment journals; peer reviewed environmental journals; open access; juniper publishers; ournal of Environmental Sciences; juniper publishers journals; juniper publishers reivew (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:adp:ijesnr:v:1:y:2017:i:5:p:157-162

DOI: 10.19080/IJESNR.2017.01.555575

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