Abstract
Insoluble dietary fiber from soybean residue (SIDF) was treated with dynamic high-pressure microfluidization (DHPM) and used as adsorbent for Pb(II) ion. The effects of pressure on the Pb(II) adsorption capacity, primary cilia structure and surface topography of SIDF were determined using a gastrointestinal simulated model in vitro. SIDF (at pH 7.0) showed maximum binding capacity (261.42 ± 2.77 μmol/g), which was about 1.13 times higher than that of untreated sample (233.47 ± 1.84 μmol/g), when pressure reached 80 MPa. However, the net adsorption value of SIDF in a simulated small intestine (~ 9 μmol/g) was significantly lower than that in the stomach (~ 48 μmol/g), because of the competitive adsorption of Pb2+ by pancreatin, cholate and several enzymes in the small intestine. In addition, the adsorption capacity of SIDF exhibited good linear relationship with the physicochemical properties of total negative charges, and the adsorption behavior presumably occurred on the surface area of granules fiber.
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Abbreviations
- DHPM:
-
dynamic high pressure microfluidization
- SIDF:
-
soybean insoluble dietary fiber
- BCmax :
-
maximum binding capacity
- BCmin :
-
the minimum binding concentration
- WHC:
-
water-holding capacity
- TNC:
-
total negative charge
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Acknowledgments
This study was supported by the Freedom Explore Program of State Key Laboratory of Food Science and Technology, Nanchang University (SKLF-ZZB-201310), The Key Project for Science and Technology Innovation of Jiangxi Province (20124ACB00600), and Earmarked fund for Jiangxi Agriculture Research System (JXARS-04).
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Wang, H., Huang, T., Tu, Z..c. et al. The adsorption of lead(II) ions by dynamic high pressure micro-fluidization treated insoluble soybean dietary fiber. J Food Sci Technol 53, 2532–2539 (2016). https://doi.org/10.1007/s13197-016-2203-2
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DOI: https://doi.org/10.1007/s13197-016-2203-2