Adsorption of norfloxacin from aqueous solution on biochar derived from spent coffee ground: Master variables and response surface method optimized adsorption process

Nguyen, Van-Truc; Vo, Thi-Dieu-Hien; Nguyen, Thanh-Binh; Dat, Nguyen Duy; Huu, Bui Trung; Nguyen, Xuan-Cuong; Tran, Thanh; Le, Thi-Ngoc-Chau; Duong, Thi-Giang-Huong; Bui, Manh‐Ha; Dong, Cheng–Di; Bui, Xuan‐Thanh

doi:10.1016/j.chemosphere.2021.132577

Cited by 84 publications

(34 citation statements)

References 47 publications

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“…Researchers have examined different adsorbent materials such as activated carbon [ 98 ], biochar [ 99 , 100 ], natural clay [ 101 ], carbon aerogels [ 102 ], HAp, etc. for organic pollutant removal from an aqueous solution.…”

Section: Adsorption Of Organic Pollutants From Aqueous Solutionsmentioning

confidence: 99%

Applications of Nano Hydroxyapatite as Adsorbents: A Review

et al. 2022

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Nano hydroxyapatite (Ca10(PO4)6(OH)2, HAp) has aroused widespread attention as a green and environmentally friendly adsorbent due to its outstanding ability in removing heavy metal ions, radio nuclides, organic pollutants and fluoride ions for wastewater treatment. The hexagonal crystal structure of HAp supports the adsorption mechanisms including ionic exchange reaction, surface complexation, the co-precipitation of new partially soluble phases and physical adsorption such as electrostatic interaction and hydrogen bonding. However, nano HAp has some drawbacks such as agglomeration and a significant pressure drop during filtration when used in powder form. Therefore, instead of using nano HAp alone, researchers have worked on modificationsand composites of nano HAp to overcome these issues and enhance the adsorption capacity. The modification of cationic doping and organic molecule grafting for nano HAp can promote the immobilization of ions and then increase adsorption capacity. Developing nano HAp composite with biopolymers such as gelatin, chitosan and chitin has proven to obtain a synergetic effect for improving the adsorption capacity of composites, in which nano HAp fixed and dispersed in polymers can playmuch more of a role for adsorption. This review summarizes the adsorption properties and adsorbent applications of nano HAp as well as the methods to enhance the adsorption capacity of nano HAp.

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Section: Adsorption Of Organic Pollutants From Aqueous Solutionsmentioning

confidence: 99%

Applications of Nano Hydroxyapatite as Adsorbents: A Review

et al. 2022

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“…In addition, it also has the ability to process a high volume of wastewater minus the production of noxious sludge [ 13 ]. Low-cost and environmentally friendly adsorbents such as chitosan [ 14 , 15 ], clay materials [ 16 , 17 , 18 ], rice husk ash [ 19 ], spent coffee ground [ 20 ], crab shells [ 21 ], and tea leaves [ 22 ] have recently gained attention as alternatives to commercial adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Fixed-Bed Adsorption of Lead from Aqueous Solution Using Chitosan-Coated Bentonite

Futalan

Wan

2022

IJERPH

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In this study, fixed-bed adsorption of Pb(II) from an aqueous solution using chitosan-coated bentonite (CCB) was investigated. Characterization of CCB was performed using Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The effects of varying bed height (1.3 to 4.3 cm), flow rate (0.20 to 0.60 mL/min), and initial concentration (500 to 1500 mg/L) on the length of mass transfer zone (Zm) and adsorption capacity at breakthrough (qb) and exhaustion (qe) were examined. Low flow rate and high bed height were determined to cause a longer time to reach breakthrough and exhaustion. Meanwhile, the fixed-bed system was observed to quickly attain breakthrough and exhaustion under high initial concentrations. Kinetic column models such as the Thomas, Yoon–Nelson, and Clark models were used to predict the breakthrough curves. High R2 values (0.9758 ≤ R2 ≤ 0.8087) were attained for the Thomas model, which indicates that there is good agreement between experimental data and linear plots generated by the Thomas model. Moreover, the Thomas model is best in describing the breakthrough curves of Pb(II) removal under a fixed-bed system.

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“…In addition, O/C could be employed to estimate the hydrophilicity of biochar [ 31 ]. If the O/C ratio was decreased, this suggests that oxygenic functional groups (carbonyl and carboxyl) were reduced, which was in favor of improving biochar stability [ 33 ]. As shown in Table S2 , the O/C ratio of SDMBC600 was reduced to 0.85 from 0.91 of SDBC600, while the (N+O)/C ratio of SDMBC600 was reduced to 0.97 from 1.04 of SDBC600.…”

Section: Resultsmentioning

confidence: 99%

A Stable Fe-Zn Modified Sludge-Derived Biochar for Diuron Removal: Kinetics, Isotherms, Mechanism, and Practical Research

Liu

Wang

et al. 2023

Molecules

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To remove typical herbicide diuron effectively, a novel sludge-derived modified biochar (SDMBC600) was prepared using sludge-derived biochar (SDBC600) as raw material and Fe-Zn as an activator and modifier in this study. The physico-chemical properties of SDMBC600 and the adsorption behavior of diuron on the SDMBC600 were studied systematically. The adsorption mechanisms as well as practical applications of SDMBC600 were also investigated and examined. The results showed that the SDMBC600 was chemically loaded with Fe-Zn and SDMBC600 had a larger specific surface area (204 m2/g) and pore volume (0.0985 cm3/g). The adsorption of diuron on SDMBC600 followed pseudo-second-order kinetics and the Langmuir isotherm model, with a maximum diuron adsorption capacity of 17.7 mg/g. The biochar could maintain a good adsorption performance (8.88–12.9 mg/g) under wide water quality conditions, in the pH of 2–10 and with the presence of humic acid and six typical metallic ions of 0–20 mg/L. The adsorption mechanisms of SDMBC600 for diuron were found to include surface complexation, π–π binding, hydrogen bonding, as well as pore filling. Additionally, the SDMBC600 was tested to be very stable with very low Fe and Zn leaching concentration ≤0.203 mg/L in the wide pH range. In addition, the SDMBC600 could maintain a high adsorption capacity (99.6%) after four times of regeneration and therefore, SDMBC600 could have a promising application for diuron removal in water treatment.

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Adsorption of norfloxacin from aqueous solution on biochar derived from spent coffee ground: Master variables and response surface method optimized adsorption process

Cited by 84 publications

References 47 publications

Applications of Nano Hydroxyapatite as Adsorbents: A Review

Applications of Nano Hydroxyapatite as Adsorbents: A Review

Fixed-Bed Adsorption of Lead from Aqueous Solution Using Chitosan-Coated Bentonite

A Stable Fe-Zn Modified Sludge-Derived Biochar for Diuron Removal: Kinetics, Isotherms, Mechanism, and Practical Research

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