Enhanced adsorption of rhodamine B from water by Fe-N co-modified biochar: Preparation, performance, mechanism and reusability

Li, Xiumin; Shi, Jingxin; Luo, Xianxin

doi:10.1016/j.biortech.2021.126103

Cited by 98 publications

(26 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is attributed to the weakly covalent nature of Ca 2+ , allowing for a reduction in the hydration of the high-valent cations, and thus an increase in the interaction between Ca 2+ and the adsorbent surface. As a result, Ca 2+ is more readily adsorbed on biogenic carbon in solution, 29 occupying the adsorption sites of SMX and leading to a decrease in adsorption capacity. As shown in Figure 6 d, this study examined the adsorption effect of Fe-N-BC on SMX in synthetic piggery wastewater.…”

Section: Resultsmentioning

confidence: 99%

“…Two different desorption solutions were selected to desorb the SMX on the spent biochar to investigate the reusability of biochar. 29 Group A was H 2 O 2 and methanol (MeOH) (0.1:10 mol/L, V = 1:1), and group B was ammonia and methanol (1:20 mol/L, V = 1:1). The spent biochar and regeneration solution were added to the conical flask at a ratio of 1:10 ( w / V ).…”

Section: Methodsmentioning

confidence: 99%

“…Doping N on the aromatic carbon ring of biochar can generate positive holes, and the resulting difference in electronegativity can attract electron-rich organic contaminants because the molecular arrangement of the organic pollutants was more nucleophilic. Fe-N co-doped biochar could promote the adsorption of organic pollutants through π–π EDA interactions and Lewis acid–base interactions . Biochar can enhance the removal of contaminants through the surface rich in nitrogen-containing functional groups and highly dispersed and stable iron oxides.…”

Section: Introductionmentioning

confidence: 99%

“…Fe-N co-doped biochar could promote the adsorption of organic pollutants through π–π EDA interactions and Lewis acid–base interactions. 29 Biochar can enhance the removal of contaminants through the surface rich in nitrogen-containing functional groups and highly dispersed and stable iron oxides. The use of N-doped magnetic biochar as an adsorbent for sulfonamides is rarely reported.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Efficient Adsorption of a Sulfonamide Antibiotic in Aqueous Solutions with N-doped Magnetic Biochar: Performance, Mechanism, and Reusability

Diao

Shan

et al. 2022

ACS Omega

View full text Add to dashboard Cite

Conventional biochar has limited effectiveness in the adsorption of sulfonamide antibiotics, while modified biochar exhibits greater adsorption potential. Residues of sulfamethoxazole (SMX) in the aquatic environment can threaten the safety of microbial populations as well as humans. In this study, iron–nitrogen co-doped modified biochar (Fe-N-BC) was prepared from palm fibers and doped with Fe and urea via synthesis at 500 °C. Fe-N-BC has a richer surface functional group based on elemental content, X-ray photoelectron spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The Brunauer–Emmett–Teller (BET) specific surface area test exhibited Fe-N-BC, which possessed a greater surface area (318.203 m2/g) and a better developed pore structure (0.149 cm3/g). The results of the hysteresis loop and the Raman spectrum show that Fe-N-BC has a higher degree of magnetization and graphitization. Fe-N-BC showed a remarkable adsorption capacity for SMX (42.9 mg/g), which could maintain 93.4% adsorption effect after four cycles, and 82.8% adsorption capacity in simulated piggery wastewater. The adsorption mechanism involves pore filling, surface complexation, electrostatic interactions, hydrogen bonding, and π–π EDA interactions. The results of this study show that Fe-N-BC prepared from palm fibers can be a stable, excellent adsorbent for SMX removal from wastewater and has promise in terms of practical applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficient Adsorption of a Sulfonamide Antibiotic in Aqueous Solutions with N-doped Magnetic Biochar: Performance, Mechanism, and Reusability

Diao

Shan

et al. 2022

ACS Omega

View full text Add to dashboard Cite

show abstract

“…BET was used to determine the N 2 adsorption-desorption curves of SDMBC600 (see Table S1 and Figure S1 ). The N 2 adsorptions-desorption isotherm of SDMBC600 conformed to type IV adsorption isotherm following the classification of the International Union of Pure and Applied Chemistry (IUPAC) [ 30 ]. This indicates that SDMBC600 was mesoporous.…”

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

View full text Add to dashboard Cite

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.

show abstract

Boosting Efficient Ammonium Rejection and Water Evaporation Rate by Solar‐Driven Hydrogel Evaporation

Wang,

Mu,

Zhou

et al. 2024

Adv Energy and Sustain Res

View full text Add to dashboard Cite

Solar‐driven evaporation using hydrogels and photothermal materials is a promising freshwater harvesting technology. However, due to the difficulty of removing volatile pollutants through evaporation and the fact that the evaporation efficiency has reached its limit, further improving efficiency becomes challenging. Therefore, a material simultaneously possessing low water evaporation enthalpy as well as the ability to inhibit volatile pollutants is desired. In this work, a dense inhibitory layer on the hydrogel framework of polyacrylamide introduced into polyvinyl alcohol is designed to enhance its suppression of volatile pollutants and regulate the water state. This not only reduces the energy demand for evaporation but also makes it more effective in treating wastewater containing volatile pollutant ammonia nitrogen. Finally, a high evaporation rate of 3.0 kg m−2 h−1 and an excellent ammonium rejection rate of 90% for high concentration ammonia wastewater are obtained under 1 kW m−2 illumination. This work opens up new avenues of application for the use of photothermal materials in the use of clean solar energy for the separation of freshwater and volatile small molecules.

show abstract

Enhanced adsorption of rhodamine B from water by Fe-N co-modified biochar: Preparation, performance, mechanism and reusability

Cited by 98 publications

References 39 publications

Efficient Adsorption of a Sulfonamide Antibiotic in Aqueous Solutions with N-doped Magnetic Biochar: Performance, Mechanism, and Reusability

Efficient Adsorption of a Sulfonamide Antibiotic in Aqueous Solutions with N-doped Magnetic Biochar: Performance, Mechanism, and Reusability

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

Boosting Efficient Ammonium Rejection and Water Evaporation Rate by Solar‐Driven Hydrogel Evaporation

Contact Info

Product

Resources

About