Nanocomposites of graphene and zirconia for adsorption of organic-arsenic drugs: Performances comparison and analysis of adsorption behavior

Nanocomposites of zirconia@activated carbon derived from a hazelnut shell for the adsorption of tetracyclines from water

“…The species of the three antibiotics and the surface charge of ZrO 2 @AC can be significantly affected by solution pH. 36 The value of the zero charge point of pH (pH ZCP ) of ZrO 2 @AC was found to be 7.8 ± 0.5 by the pH drift method as described in ESI † 37 . Tetracycline antibiotics own the multi-ionic species (such as a cation at pH < 3.3, a zwitterion at pH of 3.3–7.7, and an anion at pH > 7.7) due to the protonation–deprotonation of the amide, phenolic β-diketone, and dimethyl-ammonium groups.…”

“…36 The value of the zero charge point of pH (pH ZCP ) of ZrO 2 @AC was found to be 7.8 ± 0.5 by the pH drift method as described in ESI. † 37 Tetracycline antibiotics own the multi-ionic species (such as a cation at pH < 3.3, a zwitterion at pH of 3.3-7.7, and an anion at pH > 7.7) due to the protonation-deprotonation of the amide, phenolic β-diketone, and dimethyl-ammonium groups. 26 The removal rates of TC, OTC, and CTC are significantly influenced by the pH of the feed solution (Fig.…”

Dodonaea angustifolia Extract-Assisted Green Synthesis of the Cu2O/Al2O3 Nanocomposite for Adsorption of Cd(II) from Water

“…These features make them significant materials for rapid, sensitive, and effective adsorptive removal of various heavy metal ions such as Cd 2+ , Hg 2+ , and Pb 2+ . Besides this, researchers devoted their work to fabricate metal oxide-based hybrid nanocomposites by integrating two or more metal oxide nanomaterials to enhance the heavy metal removal absorption capacity . Interestingly, the metal oxide nanocomposites avoided aggregation of materials and showed improved heavy metal adsorption performances. , In this line, various kinds of composites such as Fe 2 O 3 /Al 2 O 3 , polythiophene/Al 2 O 3 , polyaniline/Al 2 O 3 , poly­(vinylidene fluoride) (PVDF)/poly­(vinyl alcohol) (PVA)/Al 2 O 3 , Cu 2 O/ZnO, Fe 2 O 3 /Cu 2 O, and TANI/Cu 2 O/Ag have been reported for the removal of a variety of metal ions such as As­(V), Pb­(II), Zn­(II), Cd­(II), Cu­(II), Pb­(II), Ni­(II), and Hg­(II) ions.…”

“…Besides this, researchers devoted their work to fabricate metal oxide-based hybrid nanocomposites by integrating two or more metal oxide nanomaterials to enhance the heavy metal removal absorption capacity. 14 Interestingly, the metal oxide nanocomposites avoided aggregation of materials and showed improved heavy metal adsorption performances. 7 , 15 In this line, various kinds of composites such as Fe 2 O 3 /Al 2 O 3 , 16 polythiophene/Al 2 O 3 , 17 polyaniline/Al 2 O 3 , 18 poly(vinylidene fluoride) (PVDF)/poly(vinyl alcohol) (PVA)/Al 2 O 3 , 19 Cu 2 O/ZnO, 20 Fe 2 O 3 /Cu 2 O, 21 and TANI/Cu 2 O/Ag 22 have been reported for the removal of a variety of metal ions such as As(V), Pb(II), Zn(II), Cd(II), Cu(II), Pb(II), Ni(II), and Hg(II) ions.…”

Enhanced remediation of As(iii) and As(v) by new zirconium-loaded attapulgite and its mechanisms in the aquatic environment

“…12,45,46 Based on its insolubility and nontoxicity, zirconium-containing materials have been extensively applied as modifying agents to improve the adsorption performance of raw materials to the targets. [46][47][48][49] Moreover, compared to our previous study on As adsorbents and immobilization materials, 50 ATP is superior to bentonite in terms of both modification cost and direct synthesis.…”