Remove mechanisms of sulfamethazine by goethite: the contributions of pH and ionic strength

Guo, Xuetao; Yin, Yongyuan; Yang, Chen; Zhang, Qian

doi:10.1007/s11164-016-2472-4

Cited by 20 publications

(3 citation statements)

References 40 publications

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“…The removal efficiency increases slowly and then decrease rapidly with the increase of pH values. The experimental results are consistent with those previously reported in the literature [25][26]. The total adsorption amount is shown in Figure 4 which indicates that the best adsorption capacity is achieved when the pH value is 4.…”

Section: The Effect Of Phsupporting

confidence: 91%

Enhanced adsorption of sulfonamide antibiotics in water by modified biochar derived from bagasse

Qin¹,

Huang

Tang³

et al. 2019

Open Chemistry

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In this study, biochars derived from bagasse were prepared and their ability for the adsorption of four kinds of sulfonamide antibiotics (sulfamethoxazol, thiazole, methylpyrimidine, dimethylpyrimidine) was investigated. Results showed that the modified biochar can efficiently adsorb sulfonamides in water. The biochar obtained at 500oC and modified with 30% hydrogen peroxide was chosen as the adsorbent. Under optimum conditions, pH 4 and 35°C, great adsorption performance was exhibited in the adsorption process of the four sulfonamide antibiotics. The productivity of the modified biochar was ~ 89% compared to un-modified biochar which is ~31%. The successful preparation of biochar from bagasse indicates that it is a good way to reuse the resources. Besides the adsorption of antibiotics, the obtained material also has a great prospect in the removal of other pollutants.

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Section: The Effect Of Phsupporting

confidence: 91%

Enhanced adsorption of sulfonamide antibiotics in water by modified biochar derived from bagasse

Qin¹,

Huang

Tang³

et al. 2019

Open Chemistry

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“…Roca Jalil et al [16] studied the adsorption kinetics and isotherms of ciprofloxacin on montmorillonite, and considered that the solubility of antibiotics and environmental pH were important factors affecting the adsorption reaction. Guo et al [17] investigated the effect of pH on the adsorption of sulfamethazine on goethite, considering that the π-π electron donor-acceptor interactions and outer-and inner-sphere complexions might be the dominating adsorption mechanisms under acidic and neutral conditions, while the adsorption in alkali conditions might be dominated by electrostatic interactions. Paul et al [18] and Li et al [19] also studied the adsorption mechanism of fluoroquinolones on iron-containing minerals, in which the influencing factors such as pH, temperature and co-existing ions were investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of Co-Existing Cations and Anions on the Adsorption of Antibiotics on Iron-Containing Minerals

et al. 2022

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The adsorption of antibiotics on minerals is an important process in their environment behavior. The adsorption behavior of antibiotics on iron-containing minerals and the effect of co-existing cations and anions were studied in this work. Magnetite, hematite, goethite and kaolin were selected as the representative minerals and characterized by SEM, XRD and BET. A total of eight antibiotics, including three quinolones, three sulfonamides and two mycins were chosen as the research targets. Results showed a higher adsorption amount of quinolones than that of sulfonamides and mycins on the surface of iron-containing minerals in most mineral systems. The adsorption isotherms of quinolones can be well fitted using the Freundlich models. The effects of five cations and five anions on the adsorption of quinolones were investigated, among which Mg2+, Ca2+, HCO3− and H2PO4− mainly showed significant inhibition on the adsorption, while the effects of K+, Na+, NH4+, Cl−, NO3− and SO42− showed less. Natural surface water samples were also collected and used as media to investigate the adsorption behavior of quinolones on iron-containing minerals. The buffering capacity of the natural water kept the reaction solution at circumneutral conditions, and the adsorption amount was mostly promoted in the goethite system (from 0.56~0.78 μmol/g to 0.52~1.43 μmol/g), but was inhibited in the other systems (magnetite: from 1.13~1.33 μmol/g to 0.45~0.76 μmol/g; hematite: from 0.52~0.65 μmol/g to 0.02~0.18 μmol/g; kaolin: from 1.98~1.99 μmol/g to 0.90~1.40 μmol/g). The results in this work help to further understand the transportation and fate of antibiotics in an aqueous environment.

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“…The hydrophobic sites on the surface of m-TiO2/Fe3O4 can interact with SMZ molecules through hydrophobic interaction. In previous research articles, it was reported that their adsorption mechanism involves the hydrophobic interaction between SMZ molecules and TiO2-zeolite composites, 265 goethite, 266 zeolite, 267 and hierarchically porous carbon. 102 When the pH value > 7.4 ± 0.2, the hydrophobic partitioning of the anionic form of SMZ is significantly lower than that of SMZ at pH between 2.28 and 7.42.…”

Section: Effects Of Coexisting Ions and Solution Phmentioning

confidence: 99%

Mesoporous and nanostructured metal oxides for adsorptive water treatment

Al‐Salihi¹

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[EMBARGOED UNTIL 6/1/2023] Sewage containing a certain amount of dyes, when discharged into the environment, will cause serious problems and diseases to the human body and pose a threat to the ecosystem. In addition, waste from large animal farms, antibiotics used in aquaculture, and wastewater from hospitals and manufacturers are the main sources of antibiotic pollution in the environment, leading to antibiotic resistance genes. Therefore, this dissertation research was focused on materials that are easily available, environmentally friendly and low cost in removing dyes and antibiotics from the wastewater streams. The condensed layer deposition technique (CLD) was used to make novel mesoporous metal oxides to achieve nanoscale structures with high surface areas for adsorptive water treatment. The potential of mesoporous Al2O3 nanoshells, mesoporous TiO2 coatings on Fe3O4 nanoparticles, and aluminosilicate zeolite as adsorbents in water treatment was evaluated for the removal of Congo red (CR), sulfamethazine (SMZ) and tetracycline (TC) from aqueous solutions, respectively. Experimental parameters such as contact time, temperature, ionic strength and pH value were investigated in each study. The kinetics and thermodynamic equilibrium of those adsorption processes were modeled based on the experiments. For alumina nanoshells, carbon black (CB) was first successfully coated with alumina using the CLD process, followed by removing the CB, leading to porous Al2O3 nanoshells, with a high specific surface area (217.7 m2 g-1) The adsorption rate of CR on the Al2O3 nanoshells was fast, with 68.5 [percent] achieved in the first 5 min and 94.5 [percent] within 30 min. The strong adsorptive affinity of Al2O3 nanoshells for CR is attributed to the hydrogen bonding and electrostatic attraction. The activation energy studies indicated that the binding process occurs through chemisorption. Mesoporous TiO2 coatings on Fe3O4 nanoparticles (m-TiO2/Fe3O4) were prepared with a high specific surface area of 291.42 m2 g-1 and used to remove SMZ. The m-TiO2/Fe3O4 achieved a high adsorption capacity of 270.3 mg g-1 toward SMZ at 25 [degrees] C and pH 7.01, with a fast equilibrium time of 40 min. The adsorption process was exothermic and spontaneous. The hydrogen bonding and hydrophobic interactions between the SMZ and m-TiO2/Fe3O4 played a vital role in the adsorption process. Reusability experiments on this magnetic nanocomposite adsorbent showed only a 5.2 [percent] decrease in activity after 5 cycles, demonstrating a great reusability of the adsorbent. It can reduce both cost and material waste in water treatment. Aluminosilicate zeolite in the form of nanoparticles were synthesized in heptane with condensed water and aluminum and silicon precursors. The TC removal efficiency on this adsorbent is above 97 [percent] in a wide pH range from 4.70 to 7.17 within only 20 min. The high adsorption affinity is attributed to the hydrogen bonding between TC and the hydroxyl groups in the aluminosilicate zeolite and the outer-sphere complexation. The thermodynamic studies revealed that the adsorption process is spontaneous and exothermic. Finally, the kinetic studies have shown that the adsorption processes of the three organic pollutants follow a pseudo-second-order model. In addition, the Langmuir isotherm adsorption model is in good agreement with the experimental data. Overall, these studies suggest that, due to their fast kinetics and high adsorption capacity, the low-cost mesoporous materials are highly effective as adsorbents for separating dyes and antibiotics from contaminated water.

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Remove mechanisms of sulfamethazine by goethite: the contributions of pH and ionic strength

Cited by 20 publications

References 40 publications

Enhanced adsorption of sulfonamide antibiotics in water by modified biochar derived from bagasse

Enhanced adsorption of sulfonamide antibiotics in water by modified biochar derived from bagasse

Effect of Co-Existing Cations and Anions on the Adsorption of Antibiotics on Iron-Containing Minerals

Mesoporous and nanostructured metal oxides for adsorptive water treatment

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