Tylosin Removal Research Articles

Application of goethite modified biochar for tylosin removal from aqueous solution

Abstract Recent investigations have shown frequent detection of pharmaceuticals in soils and waters posing potential risks to human and ecological health. Here, we report the enhanced removal of tylosin (TYL) from water by a novel goethite biochar (BCF) composite. Characterization by scanning electron microscopy (SEM) images showed good dispersion of goethite nanoparticles on the biochar surface. The coating was constructed by well-crystallized cubic phase goethite nanoparticles as examined by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis. To evaluate the feasibility of BCF composite as a potential adsorbent for antibiotic removal, batch sorption experiments were conducted using TYL as the model antibiotic molecule. The results showed that this adsorbent showed rapid and high sorption of TYL. According to the Henry and Freundlich model, the maximum capacities of TYL on BCF were 8132.89 L/kg and 5386.76 (μg/g)/(mg/L) n respectively. Besides, the sorption capacity of TYL on BCF was obviously affected by pH and ionic strength. The sorption mechanisms of TYL on BCF were contributed to hydrophobic, electrostatic, H-bonding, cation exchange and π-π EDA interaction. The present work suggests that BCF composite, owing to their simple preparation procedures, high sorption capacity, low cost, and environmentally benign nature, have great potential as the next-generation adsorbent in the removal of antibiotics and other emerging contaminants.

An efficient method for tylosin removal from an aqueous solution by goethite modified straw mass

Renewable agricultural residues are produced in large quantities as waste, and their storage and management create environmental problems.

Feasibility of combined electrochemical and biological treatment for tylosin removal

The purpose of this work was to examine biodegradability improvement of tylosin - containing solutions after an electrochemical pre-treatment, since about 70% of the applied drugs are not metabolized and hence can be found in wastewaters. Cyclic voltammetry with nickel electrode revealed a significant electrochemical activity of tylosin, on nickel electrode. Electrochemical treatment was, therefore, performed in a home-made flow cell. Optimal conditions led to more than 95% conversion yield of tylosine, in oxidation, using alkaline media as supporting electrolyte. TOC analyses of the electrolyzed solution revealed that the level of mineralization remained low, underlying the interest of a combined electrochemical and biological treatment. The biodegradability, based on the BOD 5 on COD ratio, increased from 0, for untreated tylosin, to 0.43 for electrolyzed tylosin at 0.55 V/ESC.

Removal of tylosin from aqueous solution by UV/nano Ag/S2O 8 2− process : Influence of operational parameters and kinetic study

The present work deals with the photooxidative degradation of tylosin antibiotic (TYL) in the presence of potassium peroxydisulfate (K2S2O8) irradiated by UV-C in the presence of immobilized nano silver. Effects of pH, temperature, peroxydisulfate concentration and immobilized nano silver dosage on the degradation efficiency of TYL were examined. Degradation efficiency was small when the oxidation was carried out in the absence of UV irradiation. Results showed that degradation of TYL increases with temperature, nano Ag and peroxydisulfate initial concentration and decreases with pH. Due to UV/nano Ag/S2O 8 2− processes, more than 90% of TYL can be degraded at room temperature in 35 min at an initial concentration of 50 mgl−. Degradation reaction order of TYL by UV/nano Ag/S2O 8 2− process is 1.89. Meanwhile, the initial rates of degradation in UV/nano Ag/S2O 8 2− processes can be described well by the Langmuir-Hinshelwood kinetic model.

Effects of Matrix and Functional Groups on Tylosin Adsorption onto Resins and Carbon Nanotubes

The presence of macrolide antibiotics in aquatic environments causes serious antibiotic resistance propagation in microorganisms. In this study, the use of porous resins as adsorbents for the removal of tylosin from aqueous solutions was evaluated. The effectiveness of the resins (macroporous resin XAD-4, hypercross-linked resin MN-202, and aminated polystyrene resin MN-150) was compared with commercial hydroxylated multiwall carbon nanotubes (H-MWCNTs). Similar patterns of pH-dependent adsorption were observed despite the different surface properties and pore structures of the three resins, implying the importance of the tylosin molecular form in the adsorption process. Tylosin adsorption onto the four adsorbents showed different ionic strengths and temperature dependence consistent with the tylosin speciation and corresponding adsorption mechanism. The adsorption of tylosin onto the XAD-4 and MN-202 is mainly controlled by the intermolecular interactions between the matrix of the adsorbents and the tylosin molecule, whereas specific bonds among multiple surface functional groups are the predominant contributors to MN-150 and H-MWCNTs. The pore size is the key parameter in tylosin adsorption onto the surface of the adsorbents. The adsorption kinetics of the four adsorbents followed the pseudo-second-order model. The adsorption isotherm data well fit the Langmuir models, indicating surface coverage by a monomolecular layer.

Photocatalytic degradation of tylosin via ultraviolet-activated persulfate in aqueous solution

Some of organic materials such as antibiotics are hazardous contaminants in the aquatic environment because of their adverse effects on aquatic life, environment, and humans. In this work, a batch reactor of ultraviolet (UV) light and peroxydisulfate were studied for the degradation of tylosin as a model antibiotic in water. The effect of different parameters such as UV irradiation, peroxydisulfate concentration, antibiotic concentration, and pH on removal of tylosin was investigated carefully. No significant destruction was observed using separate UV illumination. More than 90% removal occurred when peroxydisulfate was added to the solution in optimum levels of tylosin and peroxydisulfate concentration.

Combined electrochemical and biological treatment for tetracycline and tylosin removal

Combined electrochemical and biological treatment for tetracycline and tylosin removal

Treatment of Pharmaceutical Wastewater Containing Tylosin in an Anaerobic — Aerobic Reactor System

Effluents from manufacturing operations in the pharmaceutical industry, such as antibiotic formulation, usually contain recalcitrant compounds. An approach towards appropriate technology for the treatment of pharmaceutical wastewaters has become imperative due to strict water quality legislation for environmental protection. In the present study, an Up-Flow Anaerobic Stage Reactor (UASR) and a Porous Membrane Activated Sludge Reactor (PMASR), operating in series, were used to treat pharmaceutical wastewater containing the macrolide antibiotic Tylosin. The performance of UASR treating real pharmaceutical wastewater at various organic loading rates (OLR) (0.43 to 3.73 kg COD.m−3.d−1) was investigated. Effluent from the UASR was passed directly into a PMASR system in a continuous process. At a reactor OLR of 1.86 kg COD.m−3.d−1 (hydraulic retention time (HRT), 4 d), the soluble COD reduction was around 70 – 75% (average specific degradation rate (SDR), 1.29 kg COD.m−3.d−1 ) an average of 95% Tylosin reduction was achieved in the UASR. During this period, the soluble COD removal efficiency of the PMASR was 63 – 69% (average SDR, 0.37 kg COD.m−3.d−1). The combined UASR - PMASR treatment system was slightly more effective with 87 – 90% COD and average 97% Tylosin removal. The results indicate successful treatment of the pharmaceutical wastewater, and confirm Tylosin degradation, providing further evidence that Tylosin can be degraded efficiently in anaerobic-aerobic environments.

Pertraction continue de tylosine dans un contacteur a films tournants

Pertraction or extraction by liquid membranes is a new, prospective separation method for recovery and concentration of antibiotics from their dilute aqueous solutions. Mixture separation by pertraction is a combination of two, widely used and consecutively applied operations: extraction of solute from the feed solution and stripping of the enriched organic phase by another solution. In pertraction processes solute extraction from the feed and its stripping from the extract are combined in a way to provide a maximum yield with minimum extractant losses and energy consumption. The purpose of the present work was the study of continuous tylosin removal from its aqueous solutions in a multistage rotating disc pertractor, applying a counter-current flow. n-Décanol and n-octanol were used as membrane liquids. The effect of the feed solution residence time on pertraction efficiency was studied. A mathematical model describing the process was used for the evaluation of the stage efficiency.

Extraction of tylosin from its aqueous solutions by Rotating Film-pertraction

Removal of tylosin from its dilute aqueous solutions was studied applying the Rotating Film-pertraction technique. Non-toxic and practically water insoluble alcohols as n-octanol and n-decanol were used as intermediate, membrane liquid. A 0.001 mol/l solution of HCl was used as a stripping phase. Effects of temperature, feed phase pH-value and solute concentration on antibiotic distribution coefficients were obtained for both systems. It was found that the first two parameters have important effect, while the solute concentration in the studied range (0.02–0.1 g/l) did not modify these coefficients. Results obtained show that the first pertraction step – solute extraction from the feed – is a very fast process, while the second one – the alcohol stripping – is relatively slow, in particular when octanol was used as membrane phase. A mathematical model was proposed and used for evaluation of corresponding local mass transfer coefficients.