Parallel adsorption of low concentrated ciprofloxacin by a CoFe-LDH modified sludge biochar

Zheng, Dayang; Wu, Min; Zheng, Eryang; Wang, Yayi; Feng, Chunhua; Zou, Jiali; Juan, Maoling; Bai, Xinxing; Wang, Teng; Shi, Yongrong

doi:10.1016/j.jece.2022.108381

Cited by 23 publications

(11 citation statements)

References 39 publications

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“…When pH < 5.98, ofloxacin is mainly in the form of cations (OFL + ); when pH > 8.00, it is mainly in the form of anions (OFL – ); when it is 5.98, it mainly exists in the form of zwitterion. , The zeta potential of 70% BD-CaAl-LDH600 at different pH values is shown in Figure b. At pH < 5, electrostatic repulsion occurs between the positively charged surface of the composite and OFL + in solution, and at pH > 5, electrostatic repulsion also occurs between the negatively charged surface of the composite and the OFL – in solution. , In summary, electrostatic attraction is not the main adsorption mechanism of 70% BD-CaAl-LDH600 on ofloxacin, and the pH value of the solution is not a key factor affecting the adsorption performance of 70% BD-CaAl-LDH600 against ofloxacin …”

Section: Resultsmentioning

confidence: 99%

“…To further improve the adsorption performance of LDHs, the researchers tried to combine biochar with LDHs to prepare a composite adsorbent with better adsorption performance for antibiotics. − For example, Hoang et al prepared a novel bagasse biochar/ZnAl-layered double hydroxide by in situ growth and used it for the adsorption removal of tetracycline in water. The results showed that the maximum adsorption capacity of tetracycline by the composite reaches 41.98 mg·g –1 , which is much better than that of 9.82 mg·g –1 of bagasse biochar .…”

Section: Introductionmentioning

confidence: 99%

“…Zheng et al used sludge biochar-loaded hydrotalcite as the composite adsorbent to effectively remove the low concentration of ciprofloxacin. The adsorption capacity of the composite adsorbent to ciprofloxacin was 14 mg·g –1 , which was 2.8 times that of sludge biochar …”

Section: Introductionmentioning

confidence: 99%

“…The adsorption capacity of the composite adsorbent to ciprofloxacin was 14 mg•g −1 , which was 2.8 times that of sludge biochar. 19 Compared with the above hydrotalcite, hydrocalumite has the advantages of lower production cost and environmental friendliness. 20 Bean dregs are the main byproduct of the soybean product processing industry.…”

Section: ■ Introductionmentioning

confidence: 99%

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Calcined Bean Dregs-Hydrocalumite Composites as Efficient Adsorbents for the Removal of Ofloxacin

Zhang,

Zhou,

Luo

2023

ACS Omega

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Calcined bean dregs-hydrocalumite composites were prepared through in situ self-assembly of hydrocalumite on the surface of bean dregs and used for the adsorption of ofloxacin from water. The adsorbents were characterized by scanning electron microscopy, X-ray powder diffraction, and N 2 physical adsorption. The results showed that the adsorption performance of calcined bean dregs-hydrocalumite composites for ofloxacin was much better than that of a single bean dreg carbon or calcined hydrocalumite. The effects of preparation and adsorption conditions on the adsorption property of calcined bean dregs-hydrocalumite for ofloxacin were also investigated. The adsorption ratio of ofloxacin reached up to 99.93% using 4 g·L –1 adsorbent dosage with 20 mg·L –1 initial concentration of ofloxacin at 30 °C in 2 h. The adsorption process mainly occurred in the first 5 min. In addition, the adsorption of ofloxacin by calcined bean dregs-hydrocalumite was more in line with pseudo-second-order dynamics and the Langmuir isotherm model.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Calcined Bean Dregs-Hydrocalumite Composites as Efficient Adsorbents for the Removal of Ofloxacin

Zhang,

Zhou,

Luo

2023

ACS Omega

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“…Figure 5 shows the fitted curves for the two models, and Table 3 shows the corresponding fitted parameters. The computing method of the adjusted determination coefficient (R 2 adj ), the residual sum of squares (RSS), and the Bayesian information criterion (BIC) are shown in Equations (S1)–(S3) [ 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

Selective Recovery of Palladium (II) from Metallurgical Wastewater Using Thiadiazole-Based Chloromethyl Polystyrene-Modified Adsorbent

Zhang

Chen

Wan

et al. 2022

IJMS

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Selective adsorption of palladium from metallurgical wastewater containing Pt (IV), Rh (III), Ca2+, Cu2+, Fe3+, Ni2+, Pb2+, V3+, and Ti4+ has tremendous economic and environmental benefits. In this paper, a novel thiadiazole-based chloromethyl polystyrene-modified adsorbent, viz. 2, 5-bis-polystyrene-1,3,4-thiadiazole (PS-DMTD), was synthesized using chloromethyl polystyrene as the backbone. The experimental results show that PS-DMTD can selectively separate Pd (II) from metallurgical wastewater in a one-step adsorption process. The calculated saturation adsorption capacity of PS-DMTD for Pd (II) was 176.3 mg/g at 25 °C. The separation factors of βPd (II)/Mn+ (Mn+: Pt (IV), Rh (III), Ca2+, Cu2+, Fe3+, Ni2+, Pb2+, V3+, and Ti4+) were all higher than 1 × 104. FT-IR, XPS, and single-crystal X-ray diffraction showed that the adsorption of Pd (II) to PS-DMTD was primarily through a coordination mechanism. Density functional theory (DFT) calculations revealed that the other base metal ions could not coordinate with the PS-DMTD. Pt (IV) could not be adsorbed to PS-DMTD due to its strong chlorophilicity. Furthermore, Rh (III) existed as a polyhydrate, which inhibited Rh (III) diffusion toward the positively charged absorption sites on the PS-DMTD. These results highlight that PS-DMTD has broad application prospects in the recovery of Pd (II) from metallurgical wastewater.

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Dye Removal Characteristics of Magnetic Biochar Derived from Sewage Sludge: Isotherm, Thermodynamics, Kinetics, and Mechanism

Zeghioud

Mouhamadou

2023

Water Air Soil Pollut

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Parallel adsorption of low concentrated ciprofloxacin by a CoFe-LDH modified sludge biochar

Cited by 23 publications

References 39 publications

Calcined Bean Dregs-Hydrocalumite Composites as Efficient Adsorbents for the Removal of Ofloxacin

Calcined Bean Dregs-Hydrocalumite Composites as Efficient Adsorbents for the Removal of Ofloxacin

Selective Recovery of Palladium (II) from Metallurgical Wastewater Using Thiadiazole-Based Chloromethyl Polystyrene-Modified Adsorbent

Dye Removal Characteristics of Magnetic Biochar Derived from Sewage Sludge: Isotherm, Thermodynamics, Kinetics, and Mechanism

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