Zn²⁺ removal from the aqueous environment using a polydopamine/hydroxyapatite/Fe₃O₄ magnetic composite under ultrasonic waves

Abstract

A magnetically recoverable polydopamine (PDA)-modified hydroxyapatite (HAp)/Fe3O4 magnetic composite (HAp/Fe3O4/PDA) was synthesized to exploit its adsorption capacity to remove Zn2+ from aqueous solution and the structural properties were examined.

Peculiarities of adsorption of Cr (VI) ions on the surface of Chlorella vulgaris ZBS1 algae cells

“…To study the adsorption of Cr (VI) ions on the surface of Chlorella vulgaris ZBS1 algae cells and obtain data on adsorption equilibrium, various models of adsorption isotherms were used: Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin one [24,25,26,27,28,29,30,31,32,33,48,49].…”

“…This inexpensive composite adsorbent withstands 9-fold use with a slight decrease in the degree of removal of Cr (VI) ions. Magnetic composites polydopamine/modified hydroxyapatite/Fe 3 O 4 were used to removal Zn (II) ions from aqueous solutions [33]. At the same time, along with parameters such as the pH of the medium, the initial concentration of metal ions and the dose of the adsorbent, ultrasonic power and ultrasonic time were changed.…”

Methylene Spacer Mediated Detection Switch Between Copper and Zinc Ions by Two Coumarin‐Pyrene Based Chemosensors

“…Apart from their essential nature, they are also known for their detrimental effect due to their contribution to various syndromes such as Parkinson's and Alzheimer's disease [19,21,22] . These metals are also a serious threat to the environment due to their widespread use by the anthropogenic activities [23–25] . Therefore, detection of these metals is crucial not only for humans but also for controlling the environmental pollution [26–30] …”

“…[19,21,22] These metals are also a serious threat to the environment due to their widespread use by the anthropogenic activities. [23][24][25] Therefore, detection of these metals is crucial not only for humans but also for controlling the environmental pollution. [26][27][28][29][30] Copper is one of the critical metals in human metabolism as it aids in the physiological activities of various organs.…”

Solar Light Photoactive Floating Polyaniline/TiO2 Composites for Water Remediation

“…Among these approaches, adsorption is one of the most used treatments for the removal of pollutants from the water matrix thanks to its simplicity, low cost, high efficiency, and sustainability [13][14][15][16][17]. In fact, adsorption processes based on the use of environmentally-friendly adsorption materials, such as adsorbents originating from agricultural sources and by-products (fruits, vegetables, foods), agricultural waste and derivatives, biochar, hydroxyapatite, and so forth, represent a new generation of sustainable treatments that pave the way for new scenarios in this sector.…”