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- W1985233483 abstract "Nanoscale zero-valent iron modified by citric acid (m-NZVI) was used to remove hexavalent chromium (Cr (VI)) from landfill leachates. Citric acid was useful to enhance the dispersion of NZVI. The results demonstrated that the m-NZVI particles were uniform with a mean diameter of 45.6 nm and the specific surface area was about 22.8 m 2 /g. The Cr (VI) removal rates increased as an increase of the dosage of m-NZVI and the temperature but decreased as an increase of pH and the initial concentration of HA. Cr (VI) adsorption kinetics followed a pseudo-first-order rate expression and the reaction rate constants ranged from 0.05 to 0.32 min -1 . X-ray photoelectron spectroscope (XPS) analysis confirmed that the Fe (III)-critic acid and/or Cr (III)-HA compounds were formed on the m-NZVI surface, which could hinder the formation of Fe (III)-Cr (III) compounds. It was also shown that removing Cr (VI) by m-NZVI was a chemical controlled and irreversible process." @default.
- W1985233483 created "2016-06-24" @default.
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- W1985233483 date "2014-04-01" @default.
- W1985233483 modified "2023-09-27" @default.
- W1985233483 title "Enhanced Cr(VI) Removal from Landfill Leachates Using Nanoscale Zero-Valent Iron" @default.
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- W1985233483 doi "https://doi.org/10.4028/www.scientific.net/amr.905.12" @default.
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