WATER PURIFICATION WITH NATURAL SORBENTS

Industrial waste can be considered as technological and economical raw materials in related industries, and their disposal in compliance with environmental legislation can be environmentally efficient. Nowadays, researchers search for an effective but relatively cheap absorption material to extract various contaminants from water. Of great greatest interest are the industrial waste that can be used in wastewater treatment technology as a secondary raw material. As a rule, active coals are used in drinking water systems and deep wastewater treatment. In the Tyumen region, this type of sorbent is quite expensive, since there are no natural coal deposits. The sawdust sorbent is proposed to applied as fuel briquettes. The sorption properties of the modified pine sawdust in relation to oil products are studied herein. The correlation analysis is carried out for each type of sorbent exposure. The solution regression and correlation coefficients are calculated. The obtained equations of regression are used to construct absorption isotherms characterizing the dependence of sorption capacity on the concentration of petroleum products in the solution. The sorption activity of sawdust increases by 1.4–4 times depending on the type of modification and intensification. It is shown that the total exchange capacity of pine sawdust on the model solution is only 19.4% lower than the that of activated carbon, which is very expensive for the Tyumen region. In the case of sawdust used for water purification, two environmental problems are solved simultaneously: cheap and effective cleaning of oil-saturated surface runoff and recycling of wood waste.

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