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MA Li-sha, HAN Zhan-tao, WANG Yan-yan. 2021. Dispersion performance of nanoparticles in water. Journal of Groundwater Science and Engineering, 9(1): 37-44. doi: 10.19637/j.cnki.2305-7068.2021.01.004
Citation: MA Li-sha, HAN Zhan-tao, WANG Yan-yan. 2021. Dispersion performance of nanoparticles in water. Journal of Groundwater Science and Engineering, 9(1): 37-44. doi: 10.19637/j.cnki.2305-7068.2021.01.004
shu

Dispersion performance of nanoparticles in water

  • 1.

    Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China

  • 2.

    Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang 050061, China

  • 3.

    Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China

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    摘要

  • Engineering Nanoparticles (ENPs)' superior characteristics of adsorption depends on their dispersion in the medium. In this study, multi-walled carbon nanotubes (nonmetal), iron nanoparticles and silver nanoparticles (metallic simple substance), and Nano-TiO2, Nano-Fe2O3 and Nano-ZnO (metal oxide) were selected and respectively added into pure water and aqueous solution with 1% Sodium dodecyl benzene sulfonate (SDBS) surfactant. The dispersion effects were compared by leaving the solutions standing at room temperature under ultrasound. The results show that the dispersion of iron nanoparticles is the lowestamong the six ENPs, and that of multi-walled carbon nanotubes (MWCTS) is the highest. Adding anionic surfactants (SDBS) can obviously improve the dispersion performance of ENPs. The concentration of solution decreases by only 5% in 10 daysafter adding 1% SDBS for ultrasonic dispersion.

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    Table 1.  Fitting equations and their correlation coefficients (R2) of adsorption rate curve

    Correlation coefficient (R2) Nano-Fe Nano-Ag Nano-Fe2O3 Nano-TiO2
    Linear equation 0.528 6 0.899 4 0.522 2 0.847 3
    Exponential equation 0.815 3 0.981 7 0.729 5 0.923 7
    Logarithmic equation 0.913 9 0.902 6 0.902 1 0.867 4
    Power exponent equation 0.926 9 0.801 7 0.913 3 0.807 5
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出版历程
收稿日期:  2020-06-26
录用日期:  2020-08-16
刊出日期:  2021-03-15

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