Colloid Removal from Aqua Media via Magnetite-Based Reagent
Affiliation:
1Institute of Hydromechanics, National Science Academy of Ukraine, ul. Zheliabova 8/4, 03680 Kyiv, Ukraine, stepovanataly@yahoo.com
2Department of urban water management, Kyiv National University of Construction and Architecture, 31 Povitroflotski Pr., 03680 Kyiv, Ukraine,
alexkushka@ukr.net
DOI:
https://doi.org/10.23939/chcht05.02.155
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Abstract:
A new method has been developed to prepare an inexpensive magnetite-based reagent with balanced magnetic and sorption properties for colloidal removal from water solutions. The reagent has been obtained from the salts of ferrous iron at the room temperature. The kaolinite solution with the concentration range of 10 to 30 mg/l was chosen to carry out laboratory tests. The relationship between pH of the solution under treatment and the zeta potential of the reagent was investigated. It was found that the most effective heterocoagulation takes place at pH = 6.0–6.5. At pH > 7.5, the efficiency of water treatment decreases steeply because of the same sign of the charge and the minimal difference of potentials between the particles of the reagent and kaolinite.
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