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Adsorption and Magnetic Properties of Magneto Susceptible Adsorbents, Obtained on the Basis of Hydrolytic Lignin

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M.A. Arkhilin, N.I. Bogdanovich

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Adsorption processes are widely used in industry by recovery for removing various substances
and purification of solutions. Most common commercial adsorbents are active carbon materials. However modern carbon adsorbents have disadvantages that are absent at magneto susceptible organomineral adsorbents. The development of adsorbents possessing
magnetic susceptibility is actively pursued in the world. The use of such adsorbents in technology
makes it easy to separate them from the treated liquid phase by applying a magnetic
field and to intensify the technological process. Magneto susceptible adsorbents were prepared
by chemical activation of hydrolytic lignin with iron hydroxide (III). Fe(OH)3 was
reduced to magnetic forms of Fe and promoted to burn-off carbon from hydrolytic lignin that led to activation of a carbon matrix. Synthesis of adsorbents was performed by the planned experiment. The central rotatable second-order uniform plan for the three factors
was used. The effect of pyrolysis temperature, iron hydroxide dosage and pH of the end point of Fe(OH)3 precipitation were investigated. The resulting adsorbents were characterized
by the adsorption and magnetic properties, the nature of properties dependence on the
synthesis conditions of adsorbents was established. On the basis of experimental data the regression equations with significant coefficients are calculated. They are the mathematic models of properties dependence on the varied factors. The models allow us to predict the properties of adsorbents in the investigated range of variation of parameters. The obtained
adsorbents have high adsorption properties towards either iodine or methylene blue. Some samples have magnetic susceptibility value closed to magnetite, but the best conditions for high adsorption and magnetic properties are situated in different areas. We found the areas of conditional optimum in the investigated interval of varied parameters.


M.A. Arkhilin, Postgraduate Student N.I. Bogdanovich, Doctor of Engibeering Sciences, Professor

Authors job

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya
Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; е-mail:,


hydrolytic lignin, adsorbent organo-mineral, carbon-mineral, magneto susceptible, ferromagnetic.


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Received on March 20, 2015

Adsorption and Magnetic Properties of Magneto Susceptible Adsorbents, Obtained on the Basis of Hydrolytic Lignin