Effect of the acidic and alkaline activation of bentonite-like clays on sorption properties in relation to Fe³⁺ ions under static conditions

A study is performed of the effect the means of activation of bentonite-like clays (acidic, alkaline, combined) have on the adsorption characteristics of Fe³⁺ ions under static conditions. The mechanism of the acidic and alkaline activation of montmorillonite is identified and found to depend on the concentration of the activating agen

Research in the area of preparing activated alumina. Part 4. new technological approaches for synthesis of ultrafine α-Al₂O₃

Results of new integrated technological approaches to synthesis of ultrafine -alumina using commercially available metallurgical alumina as a raw material are presente

Modified layered alumosil icate nanosorbents for water treating

An author’s method of modification of natural layered alumosilicate nanostructured mineral montmorillonite is presented. The method is the treatment of montmorillonite with a 10% solution of sulfuric acid and subsequent activation with lithium hydroxide at a mass ratio solid alumosilicate : LiOH equaling 1 : 0.18. During pretreatment with sulfuric acid an increase in vacant positions occurs not only in the interlayer space but also in the octahedral layer of montmorillonite. In this case lithium content in the models during subsequent modify ing is higher as compared with the direct activation of natural clay with lithium hy droxi

Modified layered alumosil icate nanosorbents for water treating

An author’s method of modification of natural layered alumosilicate nanostructured mineral montmorillonite is presented. The method is the treatment of montmorillonite with a 10% solution of sulfuric acid and subsequent activation with lithium hydroxide at a mass ratio solid alumosilicate : LiOH equaling 1 : 0.18. During pretreatment with sulfuric acid an increase in vacant positions occurs not only in the interlayer space but also in the octahedral layer of montmorillonite. In this case lithium content in the models during subsequent modify ing is higher as compared with the direct activation of natural clay with lithium hy droxi