Metal–Organic Framework-Functionalized Copper–Amine Complex: A Robust Nanocomposite for Doxycycline Antibiotic Removal

Abstract

Decontamination of water from antibiotic drugs or their metabolites using an adsorption technique represents a great challenge with respect to high adsorption capacity and cost effectiveness. Antibiotic drugs are generally released in water resources after human use, and these may be classified under the category of hazardous materials or persistent organic pollutants. Therefore, the present study is aimed to explore the removal of doxycycline (DCN) antibiotic drug by novel assembled chemically modified metal–organic frameworks in the form of NTiO2/NiSA-(Si-TETA)-Cu(II) nanocomposite. Effects of some parameters such as pH (2–10 range), contact time (1–60 min), nanocomposite doses (5–100 mg), drug concentrations (5–100 mg L–1), ionic strength (0.1–1.0 mol L–1 of NaCl), and reaction temperatures (25–55 °C) on the removal efficiency of DCN drug have been investigated, optimized, and evaluated. A complex formation between DCN drug and NTiO2/NiSA-(Si-TETA)-Cu(II) nanocomposite has been proposed as the contributing master mechanism, as carefully confirmed from the kinetics, isotherm, and thermodynamic studies. The kinetics and isotherm data were described by the pseudo-second-order and Langmuir models. The maximum identified adsorption capacity values were as high as 473.05, 562.08, and 682.15 mg g–1 at 25, 40, and 50 °C, respectively. The removal efficiency values of DCN drug from water matrices by the action of NTiO2/NiSA-(Si-TETA)-Cu(II) nanocomposite were in the range 97.05 to 99.71% to elucidate that the NTiO2/NiSA-(Si-TETA)-Cu(II) nanocomposite can be applied for the removal of DCN drug from real wastewater samples.

Development of Z-scheme bimetallic tungstate-supported nitrogen deficient g-C3N4heterojunction for the treatment of refractory pharmaceutical pollutants

“…Antibiotics are responsible for the development of antibiotic-resistant bacteria and genes that can harm marine ecosystems and endanger human safety. [4][5][6] Accordingly, it is crucial to find a strategy that is both economical and effective for degrading antibiotic contamination, which remains a major challenge in the current situation.…”

Ultra-High-Capacity Adsorption of Rhodamine B in a Carboxyl-Functionalized Metal–Organic Framework via Surface Adsorption

“…Metal–organic frameworks (MOFs), consisting of organic ligands and inorganic clusters, have been widely used in various applications. In particular, due to high specific surface area, good water stability, and abundant adsorption sites, MOFs show promising potentials in the removal of organic or inorganic pollutants from aqueous solution. − Some water-stable MOFs have been used for the adsorptive removal of RhB from aqueous solution, for example, UiO-66, hierarchical porous UiO-66 (H-UiO-66), MIL-125, and MIL-68 . However, the adsorption capacities of these reported materials are still lower than those of carbon-based materials and thereby, a large improvement for MOF materials is needed.…”