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- W1972008476 abstract "This study describes the removal of arsenic species in groundwater by nano zero-valent iron process, including As(III) and As(V). Since the background species may inhibit or promote arsenic removal. The influence of several common ions such as phosphate (PO43−), bicarbonate (HCO3−), sulfate (SO42−), calcium (Ca2+), chloride (Cl−), and humic acid (HA) were selected to evaluate their effects on arsenic removal. In particular, a 26−2 fractional factorial design (FFD) was employed to identify major or interacting factors, which affect arsenic removal in a significant way. As a result of FFD evaluation, PO43− and HA play the role of inhibiting arsenic removal, while Ca2+ was observed to play the promoting one. As for HCO3− and Cl−, the former one inhibits As(III) removal, whereas the later one enhances its removal; on the other hand, As(V) removal was affected only slightly in the presence of HCO3− or Cl−. Hence, it was suggested that the arsenic removal by the nanoiron process can be improved through pretreatment of PO43− and HA. In addition, for the groundwater with high hardness, the nanoiron process can be an advantageous option because of enhancing characteristics of Ca2+." @default.
- W1972008476 created "2016-06-24" @default.
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- W1972008476 date "2012-02-01" @default.
- W1972008476 modified "2023-10-18" @default.
- W1972008476 title "Background species effect on aqueous arsenic removal by nano zero-valent iron using fractional factorial design" @default.
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- W1972008476 doi "https://doi.org/10.1016/j.jhazmat.2011.11.090" @default.
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