Intercalation of tetracycline in nano sheet layered double hydroxide: An insight into UV/VIS spectra analysis

Soori, Mohammad Mahdi; Ghahramani, Esmail; Kazemian, Hossein; Al-Musawi, Tariq J.; Zarrabi, Mansur

doi:10.1016/j.jtice.2016.03.015

Cited by 89 publications

(25 citation statements)

References 42 publications

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“…However, these “applied” antibiotics might be released continually into soils, surface waters, and ground waters due to incomplete metabolism (in animals) and discharges from drug manufacturers (Carabineiro et al, 2011 ; El-Shafey et al, 2012 ). Discharged antibiotics may lead to the development of antibiotic-resistant microorganisms (Sidrach-Cardona and Bécares, 2013 ; Soori et al, 2016 ), adverse impacts on human health through endocrine disruption, increase of antibiotic resistance genes (Huang et al, 2015 ; Hou et al, 2016 ), and the potentially toxic effects of their unwanted/unknown byproducts (Le-Minh et al, 2010 ; Zhou et al, 2013 ). Therefore, it is imperative to tackle the antibiotics polluted water before more discharges are made into the aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Adsorption Studies of Doxycycline and Ciprofloxacin Antibiotics by Biochars Prepared at Different Temperatures

et al. 2018

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This paper comparatively investigated the removal efficiency and mechanisms of rice straw biochars prepared under three pyrolytic temperatures for two kinds of tetracycline and quinolone antibiotics (doxycycline and ciprofloxacin). The influencing factors of antibiotic adsorption (including biochar dosage, pH, background electrolytes, humic acid, initial antibiotics concentration, contact time, and temperature) were comprehensively studied. The results suggest that biochars produced at high-temperature [i.e., 700°C (BC700)], have higher adsorption capacity for the two antibiotics than low-temperature (i.e., 300–500°C) biochars (BC300 and BC500). Higher surface area gives rise to greater volume of micropores and mesopores, and higher graphitic surfaces of the BC700 contributed to its higher functionality. The maximum adsorption capacity was found to be in the following order: DOX > CIP. The π-π EDA interaction and hydrogen bonding might be the predominant adsorption mechanisms. Findings in this study highlight the important roles of high-temperature biochars in controlling the contamination of tetracycline and quinolone antibiotics in the environment.

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Section: Introductionmentioning

confidence: 99%

Comprehensive Adsorption Studies of Doxycycline and Ciprofloxacin Antibiotics by Biochars Prepared at Different Temperatures

et al. 2018

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“…An important property of MMOs is the so-called “memory effect”, that is the calcined anionic clays can reconstruct their original layered structure after adsorption of various anions12. LDHs and CLDHs have been widely applied as adsorbents to remove pharmaceuticals from aqueous solutions in recent years131415. LDHs and CLDHs particles can also be loaded onto high surface area carbonaceous materials to further improve the dispersion of the LDHs and CLDHs particles, thus improving the performance and reducing the cost of LDHs and CLDHs.…”

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confidence: 99%

One-pot synthesis of carbon supported calcined-Mg/Al layered double hydroxides for antibiotic removal by slow pyrolysis of biomass waste

Tan

Liu

et al. 2016

Sci Rep

121

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A biochar supported calcined-Mg/Al layered double hydroxides composite (CLDHs/BC) was synthesized by a one-pot slow pyrolysis of LDHs preloaded bagasse biomass. Multiple characterizations of the product illustrated that the calcined-Mg/Al layered double hydroxides (CLDHs) were successfully coated onto the biochar in slow pyrolysis of pre-treated biomass. The as-synthesized CLDHs/BC could efficiently remove antibiotic tetracycline from aqueous solutions. The coating of CLDHs significantly increased the adsorption ability of biochar, and CLDHs/BC exhibited more than 2 times higher adsorption capacity than that of the pristine biochar (BC) in the tested pH range. The maximum adsorption capacity of CLDHs/BC for tetracycline was 1118.12 mg/g at 318 K. The experimental results suggested that the interaction with LDHs on biochar played a dominant role in tetracycline adsorption, accompanied with π–π interaction and hydrogen bond. This study provides a feasible and simple approach for the preparation of high-performance material for antibiotics contaminated wastewater treatment in a cost-effective way.

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“…In aqueous solutions three different groups of the molecule could undergo protonation–deprotonation reactions according to varying pH of solution. As shown in Figure 3B , three values of the dissociation constants (pK a1 ≈ 3.4; pK a2 ≈ 7.5; pK a3 ≈ 9.3) had been determined experimentally that corresponds to existence of the protonated (

), neutral zwitterionic (

), monoanionic (TCH − ), and dianionic (TC −2 ) forms of TC (Sassman and Lee, 2005 ; Soori et al, 2016 ). It could be easily seen that the bigger the pH-value was, the more amount of anionic species was.…”

Section: Resultsmentioning

confidence: 99%

The Interactions Between Three Typical PPCPs and LDH

Liao

et al. 2018

Front. Chem.

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With a layered structure, layered double hydroxide (LDH) has potential applications in remediation of anionic contaminants, which has been a hot topic for recent years. In this study, a Cl type Mg-Al hydrotalcite (Cl-LDH) was prepared by a co-precipitation method. The adsorption process of three pharmaceuticals and personal care products (PPCPs) [tetracycline (TC), diclofenac sodium (DF), chloramphenicol (CAP)] by Cl-LDH was investigated by X-ray diffraction (XRD), Zeta potential, dynamic light scattering (DLS), BET, Fourier transform infrared (FTIR) spectroscopy, and molecular dynamics simulation. The results showed that the adsorption equilibrium of TC and DF could be reached in 120 min, and the maximum adsorption capacity of the TC and DF were 1.85 and 0.95 mmol/g, respectively. The isothermal adsorption model of TC was fitted with the Freundlich adsorption model, and the isothermal adsorption model of DF was fitted with the Langmuir adsorption model. The adsorption dynamics of TC and DF followed the pseudo-second-order model. The adsorption mechanisms of the three PPCPs into Cl-LDH were different based on the experimental results and molecular dynamics simulation. The TC adsorption on Cl-LDH was accompanied by the electrostatic interactions between the negative charge of TC and the positive charge of Cl-LDH. The uptake of DF was attributed to anion exchange and electrostatic interaction. Cl-LDH does not adsorb CAP due to no electrostatic interaction. The molecular dynamic simulation further confirmed different configurations of three selected PPCPs, which were ultimately responsible for the uptake of PPCPs on Cl-LDH.

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Intercalation of tetracycline in nano sheet layered double hydroxide: An insight into UV/VIS spectra analysis

Cited by 89 publications

References 42 publications

Comprehensive Adsorption Studies of Doxycycline and Ciprofloxacin Antibiotics by Biochars Prepared at Different Temperatures

Comprehensive Adsorption Studies of Doxycycline and Ciprofloxacin Antibiotics by Biochars Prepared at Different Temperatures

One-pot synthesis of carbon supported calcined-Mg/Al layered double hydroxides for antibiotic removal by slow pyrolysis of biomass waste

The Interactions Between Three Typical PPCPs and LDH

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