Synthesis of Zeolite from Carbothermal Reduction Electrolytic Manganese Residue for the Removal of Macrolide Antibiotics from Aqueous Solution

Abstract

Zeolite analcime (EMANA) was synthesized through the hydrothermal method by using carbothermal reduction electrolytic manganese residue (CR-EMR). The structural properties of EMANA and CR-EMR were studied using various characterization techniques. After hydrothermal synthesis, the CR-EMR became super-microporous, and the surface area increased by 4.76 times than before. Among the various synthesized zeolites, 6 h-synthesized EMANA was selected as the best adsorbent for macrolide antibiotics in aqueous solution. The adsorption performance of EMANA on the adsorption capacity was examined by using various experimental parameters, such as contact time (0–24 h), initial concentration (50–300 mg/L), temperature (30–50 °C) and pH (3–13). The experimental results were also analyzed by the Langmuir and Freundlich adsorption models, with the latter obtaining better representation. The adsorption process could be described well by the pseudo-second-order model, even under a low concentration (50 mg/L). This result suggests that the adsorption process of macrolide antibiotics is due to chemisorption. According to the Fourier Transform infrared spectroscopy (FT-IR) results, the adsorption of zeolite was mainly due to its hydroxyl group, which played an important role during the adsorption process. Moreover, EMANA is more suitable for treatment of roxithromycin (ROX) than azithromycin (AZM), because ROX has more adsorption sites for the hydroxyl group.

Environmentally azithromycin pharmaceutical wastewater management and synergetic biocompatible approaches of loaded azithromycin@hematite nanoparticles

“…It can also be considered one of the safest and most effective strategies for removing antibiotics from aqueous environments 23 . In the removal of Azr from aqueous solutions, various adsorbents have been widely used at the nanoscale 20 , 24 – 28 .…”

Nanofibrous Membranes from Catalytic Arene–Norbornene Annulation (CANAL)-Based Polymers for Scavenging Organic Micropollutants

“…The reusability in the literature is often estimated by 5–10 cycles, and some materials get recovery below 80%, − while our material maintained recovery above 95%, indicating its excellent stability and reusability. Numerous adsorbents have been developed and some of them were used to remove antibiotics with approximate adsorbent capacities ranging from 35 to 500 mg g –1 . , However, electrospinning is a scalable technique to produce large quantities of adsorbent membranes.…”

“…Numerous adsorbents have been developed and some of them were used to remove antibiotics with approximate adsorbent capacities ranging from 35 to 500 mg g −1 . 60,61 However, electrospinning is a scalable technique to produce large quantities of adsorbent membranes.…”