A designed magnetic CoFe2O4–hydroxyapatite core–shell nanocomposite for Zn(II) removal with high efficiency

Hydroxyapatite for removal of heavy metals from wastewater

“…However, these additions do tend to increase the manufacturing cost, thus making it difficult to translate from a laboratory level to an industrial one. Other studies have tried to combine the reactivity of hydroxyapatite as an adsorbent with a magnetic separation process for an increased adsorption of heavy metal ions, synthesizing magnetic HAP particles [22] or magnetic core-shell nanocomposites [5]. Ca deficient HAP has also been reported to exhibit different ion substitution ability to stoichiometric HAP [18], due to its large number of Ca-deficient sites.…”

“…The presence of heavy metals in wastewater [1][2][3][4][5][6], resulting from mining operations, various manufacturing industries, leather tanning, paper production, fertilizers, photographic materials, explosives, is a major environmental concern. These elements can enter the human body both in a direct manner and following the food chain [7,8].…”

Preparation of nano‐structured pig bone hydroxyapatite for high‐efficiency adsorption of Pb2+ from aqueous solution

“…It is clear to see that, based on the calculation of the data from our results, the correlation coefficients R L 2 of Langmuir isotherm model for both n‐bone and bone samples are much higher than that of Freundlich isotherm model. Since the Langmuir model is based on the assumption that the surface properties of the adsorbent are uniform, our results suggest that all adsorption sites of the bone have relatively uniform affinity for Pb 2+ ions. In addition, our results also show that the R 2 of the n‐bone is almost close to 1, which indicates that n‐bone has more uniform affinity and provides more uniform adsorption sites than that of the bone samples.…”

Facile and Room Temperature Synthesis of Superparamagnetic Fe3O4/C Core/Shell Nanoparticles for Efficient Removal of Pb(II) From Aqueous Solution

“…For instance, Firoozeh et al. were used CoFe 2 O 4 –hydroxyapatite composite as a nanoadsorbent for the elimination of Zn(II) from aquatic environmental within 60 min . Liu et al.…”