Waste Valorization of a Recycled ZnCoFe Mixed Metal Oxide/Ceftriaxone Waste Layered Nanoadsorbent for Further Dye Removal

Abstract

Waste valorization of spent wastewater nanoadsorbents is a promising technique to support the circular economy strategies. The terrible rise of heavy metal pollution in the environment is considered a serious threat to the terrestrial and aquatic environment. This led to the necessity of developing cost-effective, operation-convenient, and recyclable adsorbents. ZnCoFe mixed metal oxide (MMO) was synthesized using co-precipitation. The sample was characterized using X-ray powder diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. Factors affecting the adsorption process such as pH, the dose of adsorbent, and time were investigated. ZnCoFe MMO showed the maximum adsorption capacity of 118.45 mg/g for ceftriaxone sodium. The spent MMO was recycled as an adsorbent for malachite green (MG) removal. Interestingly, the spent adsorbent showed 94% removal percent for MG as compared to the fresh MMO (90%). The kinetic investigation of the adsorption process was performed and discussed. In addition, ZnCoFe MMO was tested as an antimicrobial agent. The proposed approach opens up a new avenue for recycling wastes after adsorption into value-added materials for utilization in adsorbent production with excellent performance as antimicrobial agents.

Actinobacterium-Mediated Green Synthesis of CuO/Zn–Al LDH Nanocomposite Using Micromonospora sp. ISP-2 27: A Synergistic Study that Enhances Antimicrobial Activity

“…The peak that appeared at 1370 cm –1 could be attributed to the symmetric and asymmetric stretching of the C–O in the carbonate group (CO 3 ) 2– that was produced during the preparation process . The peaks at 1034, 658, and 430 cm –1 could be attributed to the M–O and M–O–M stretching vibrations in the LDH . The CuO NPs/Zn–Al LDH nanocomposite showed FTIR peaks that originated from both phases, as shown in Figure .…”

“…103 The peaks at 1034, 658, and 430 cm −1 could be attributed to the M−O and M−O−M stretching vibrations in the LDH. 114 The CuO NPs/Zn−Al LDH nanocomposite showed FTIR peaks that originated from both phases, as shown in Figure 10. Additionally, several peaks shifted to various wavenumbers, such as the peak attributed to the −OH group at 3450 cm −1 at 3447 cm −1 and the peak attributed to the stretching vibration of OH at 1625 cm −1 at 1620 cm −1 , demonstrating that LDH and CuO NPs possibly interact via hydrogen bonds.…”

A Novel Hydroxyapatite/Vitamin B12 Nanoformula for Treatment of Bone Damage: Preparation, Characterization, and Anti-Arthritic, Anti-Inflammatory, and Antioxidant Activities in Chemically Induced Arthritic Rats

“…FTIR analysis (Figure 1B) featured absorption bands for the stretching and bending vibration of hydroxyl groups at 3450 cm −1 and 1648 cm −1 [22,23]. Bands at 1430 cm −1 and 869 cm −1 indicated the existence of carbonate ions due to carbon dioxide adsorption during the synthesis of nano-HAP from alkaline media [24].…”

Investigation of ternary Zn–Co–Fe layered double hydroxide as a multifunctional 2D layered adsorbent for moxifloxacin and antifungal disinfection

“…The antimicrobial activity of ZnCoFe LDH was increased significantly at a concentration of 0.005 mg/L followed by MgZnFe LDH. ZnCoFe was also used as an adsorbent of Ceftriaxone and the spent adsorbent was recycled as an adsorbent for malachite green removal 13 . ZnCoFe was also used for oxytetracycline adsorption showing a maximum adsorption capacity of 240.29 mg/g while the spend adsorbent was recycled for methanol electro-oxidation 14 .…”