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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Cornelius Tsamo1, 2, Djibrine Sali Meali1 and Hippolyte Todou Assaouka1
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DOI:10.17265/2162-5263/2018.01.001
Affiliation(s)
1. Department of Chemistry, Maroua University, Maroua 55, Cameroon
2. Department of Agricultural and Environmental Engineering, Bamenda University, Bambili 39, Cameroon
ABSTRACT
The effects of Fe0 pre-corrosion by water,
bicarbonate, chloride, phosphate and sulfate on the efficiency of Fe0 systems for water treatment were investigated. Batch experiments were conducted
for a total duration of 72 days with MB
(Methylene Blue) and MO (Methyl Orange). The efficiency of used Fe0 was
assessed by characterizing the extent of MB and MO discoloration, pH variation
and amount of iron released as a function of anion type. Before dye addition, used Fe0 in Fe0/sand
and 100% Fe0 systems was allowed to equilibrate with H2O or the anionic solution for 0 to 44 days. Pre-corrosion has low
impact on MB discoloration but has negative impact on MO discoloration. Relative to the reference system (anion free system, H2O),
all the tested anions enhanced MB
discoloration but decreased that of MO. HPO42- and HCO3- severely affects MO discoloration. The pH of the medium governs the
discoloration with MB performing better at higher pH and MO doing same at lower
pH. For MB, Fe0/sand system shows higher efficiency than
100% Fe0 system. But the two systems show
similar efficiency for MO. Results will help in the design and functioning of
Fe0 based filtration systems and other water treatment designs using
Fe0.
KEYWORDS
Corrosion products, dye discoloration, major anions, pre-corrosion, zero-valent iron.
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