A Review on the Adsorption Studies of Tetracycline onto Various Types of Adsorbents

Abstract

Over the past few decades, the usage of antibiotics is growing on a rapid phase. The continuous use in the treatment against several bacterial infections paves a way to increased resistant strains. Environmental pollution created by antibiotics is considered as a serious problem though no toxic reports were known until now. The pharmaceutical compounds present in the environment are known as "Emerging Pollutants." Among antibiotics tetracycline (TET) class of drugs were known to exist for several years.Within 3-4 years of the discovery of the first class of TET, the resistant strains were also identified. TET usage is not only limited for human therapy but also greatly used in veterinary and agricultural purposes. These compounds have been detected in the environment, especially in aquatic farms, groundwater, surface water, etc., thus, it becomes vital to take some measures in removing these compounds from the ecosystem to some extent. Many degradation methodologies, mechanisms were applied to remove TET but were highly limited to synthetic effluents. Adsorption is a common practice at the industrial level, especially in effluent treatment processes. In this study, removal of TET through adsorption using various adsorbent was reviewed extensively.

Addition of MnO2 in synthesis of nano-rod erdite promoted tetracycline adsorption

“…reported that graphene loaded with 40% nanorod MnO 2 exhibits a maximum TC adsorption capacity ( q m ) of 1789 mg/g and that the observed adsorption capacity remains constant with increasing MnO 2 loadig from 40% to 60% 31 . In our study, P0.2 showed a desirable TC q m of 2613.3 mg/g, which is higher than those of P0, 40% MnO 2 -loaded graphene 31 , carbon materials (maximum of 1340.8 mg/g) 30 and zeolite materials (800 mg/g) 19 . P0.2 also showed a TC removal rate higher than those of other flocculants (Fig.…”

“…The adsorption capacity of the erdite nanorods for TC was investigated because the latter is a common pollutant in pharmaceutical wastewater 19,29 . Four of the most widely established isotherm models, namely, the Langmuir (Eq.…”

“…TC forms residues and is frequently detected in soil and surface waters near the discharge outlet of pharmaceutical wastewater treatment plants 16,17 . Many approaches, including wet oxidation, electrochemical treatment, photocatalysis 18 , adsorption 19,20 , coagulation and chlorination, have been developed to effectively remove TC from wastewater. Advanced oxidation employs free radicals to nonselectively oxidise organic matter (e.g.…”

Synthesized Geopolymers Adsorb Bacterial Proteins, Toxins, and Cells

“…GPs could serve as controllable, cost-effective, and synthetic aluminosilicate materials for minimizing and removing pathogenic material, such as toxins, from patient infection sites, improving patient outcomes and reducing reliance on antibiotics. While the adsorption of antibiotics with GPs is a potential concern for infection treatment, GP-mediated antibiotic removal in hemodialysis cases (Holubek et al, 2008) and in poultry, agricultural, environmental, and aquaculture settings, where pharmaceutical compounds are considered emerging pollutants (McClellan and Halden, 2010;Done and Halden, 2015;Priya and Radha, 2017;Tang et al, 2017), and in drug delivery applications (Lopes et al, 2014) could be greatly beneficial.…”

Eco-Structured Adsorptive Removal of Tigecycline from Wastewater: Date Pits’ Biochar versus the Magnetic Biochar

“…TCs are among the most used antibiotics both within therapeutic and veterinary rehearsals. For veterinary purposes only, 2500 tons are consumed annually in Europe [ 8 ]. As per the reported risk quotient (RQ) [ 3 ], tetracycline (the parent drug) is among the 14 pharmaceuticals posing a high risk to the environment.…”