Also, effective and inexpensive nanocomposite sorbents based on palygorskite and spondyl clay were obtained using impregnation.
Magnetic composite clay sorbents were synthesized by the method of impregnation of the corresponding clay minerals (saponite, palygorskite, and spondyl clay of Ukrainian deposits) with freshly prepared [Fe.sub.3][O.sub.4]-based magnetic fluid.
The synthesized magnetic nanocomposites based on saponite, palygorskite, and spondyl clays initially were investigated for the determination the structural sorption properties by nitrogen adsorption-desorption method and the adsorption properties with respect to dyes of various natures.
Sorbent samples based on spondyl clay are characterized by similar H2 type of hysteresis loop that is typical of slit-like pores, regardless of the magnetite content.
According to the diagram shown in Figure 5, saponite-based sorbents demonstrate the best sorption properties in both dyes, which are characterized by larger surface areas than spondyl clay-based samples and smaller surface areas than palygorskite-based sorbents.
Caption: Figure 4: Nitrogen adsorption-desorption isotherms for spondyl slay (a), Spo7 (b), and Spo10 (c).
Caption: Figure 6: Residual concentration (Cf) of spent sorbents particles and their moisture content (H) after magnetic separation for 30 min: (a) for saponite and its magnetic composites, (b) for palygorskite and its magnetic composites, (c) for spondyl clay and its magnetic composites: 1--initial clays, 2--modified clays with 7 wt.% of magnetite, and 3--modified clays with 10 wt.% of magnetite.
In this example, if the patient had a "doctor-patient dictionary" at hand, s/he would have discovered that "cervical" refers to the neck, "spondyl
" refers to the spine, and "-osis" means disease of, or, more loosely, something wrong with.