Tetracycline Removal from Water by Adsorption on Geomaterial, Activated Carbon and Clay Adsorbents

Abstract

The use of antibiotics for breeding and for humans increased considerably in recent years, as a dietary supplement to enhance animal growth. This frequent use leads to the detection of residues in water and wastewater. Thus, the emergence of new strains of bacteria resistant to these antibiotics and, can lead to incurable diseases of livestock, and can lead to a possible transmission of these strains to humans. The purpose of this work is to develop new materials based on treated Maghnia clay, activated carbon, cement, and PVA polymer, named geomaterials. These materials were intended for the containment of hazardous wastes in landfills. The removal of tetracycline from aqueous solution was tested by adsorption onto synthesised geomaterials and their mineral constituents. Adsorption kinetics revealed that tetracycline was rapidly retained by GM and ATMa. This was confirmed by the relatively short equilibrium time of 30 min. The pseudo-second-order and intraparticle models well fitted the adsorption kinetic of the TC-adsorbent studied systems. It was noticed that the adsorption kinetic passes through several mechanisms, was demonstrated by the multi-linearity on the plot of qt against the square root of t. The adsorption capacity (Qa ) of TC onto GM is pH-dependent. Indeed, Qa reaches a maximum value (Qa = 12.58 mg ∙ g–1 at a very acidic pH of 2, then the adsorbed amount decreases to reach a minimum value at pH of 8, and for basic pHsQa increases up to 10 mg ∙ g–1.

Bioinspired Stevia rebaudiana Green Zinc Oxide Nanoparticles for the Adsorptive Removal of Antibiotics from Water

“…The time profiles for TET adsorption (Figure d) demonstrate rapid adsorption in the first 30 min, as in the case of CIP adsorption, and then they reach equilibrium after about 120 min. This time range is in agreement with several TET adsorption studies. − Last, the effect of initial concentration on TET adsorption (Figure e) over a range of concentrations of 10–130 mg/L reveals that % removal decreases with increasing initial concentration due to the saturation of adsorption sites at higher concentrations. The highest % removal of 67.86 ± 3.41% is attained at 25 mg/L TET.…”

“…This time range is in agreement with several TET adsorption studies. 82 − 85 Last, the effect of initial concentration on TET adsorption ( Figure 5 e) over a range of concentrations of 10–130 mg/L reveals that % removal decreases with increasing initial concentration due to the saturation of adsorption sites at higher concentrations. The highest % removal of 67.86 ± 3.41% is attained at 25 mg/L TET.…”

“…Table shows that adsorption is better explained by the Langmuir model than the Freundlich model due to its higher R 2 value, suggesting monolayer adsorption, energetically equal adsorption sites, and a lack of interaction between neighboring adsorbed molecules . Several CIP and TET adsorbents have been previously fitted to the Langmuir model. ,,, In addition, the association constants for adsorption of CIP and TET ( K L ) show that the former has a higher value, indicating stronger binding, which is consistent with the regeneration results. Figure S12 in Supporting Information depicts the CIP and TET adsorption isotherm modeling linear plots.…”

Sustainable Innovation on Urban Landscape Construction and Ecological Water Environment Governance Process

“…The object of the urban landscape reflects the city's functions, artistic image, design level, theme ideas, etc. The main body reflects many aspects of human vision and feelings, knowledge structure and so on [17,18].…”

Removal of the antibiotic ciprofloxacin by using a polyvinyl alcohol/agar/maltodextrin composite membrane: Optimization by response surface methodology

“…The antibiotics typically studied and for environmental purposes are: ciprofloxacin (CFX), tetracycline (TCC), amoxicillin, oxytetracycline (OTC), and doxycycline. 6,[10][11][12][13][14][15] Polyvinyl alcohol (PVA) composites are well studied materials with diverse combined components. Therefore, researchers have used optimization models to evaluate the ability to combine components and to study the applicability of PVA composites for the treatment of pollutants.…”