Doping of carbon into boron nitride to get the increased adsorption ability for tetracycline from water by changing the pH of solution

Gao

et al. 2022

IJMS

Cow dung (CD) is a waste product of livestock production. Improper disposal of a large amount of CD will cause environmental pollution. In this work, three biochar materials based on CD (BMCD) were prepared by using three types of base, including KOH, NaOH, and mixed base (MB, a mixture of equal mass NaOH and KOH) as activators to investigate the different physicochemical properties of BMCDs (BMCD-K, BMCD-Na, and BMCD-MB). The objective was to verify the effectiveness of MB activation in the preparation of biochar materials. The results show that MB has an effect on the structural characteristics of BMCDs. In particular, the surface area and total pore volume, the specific surface area, and the total pore volume of BMCD-MB (4081.1 m2 g−1 and 3.0118 cm3 g−1) are significantly larger than those of BMCD-K (1784.6 m2 g−1 and 1.1142 cm3 g−1) and BMCD-Na (1446.1 m2 g−1 and 1.0788 cm3 g−1). While synthetic dye rhodamine B (RhB) and antibiotic tetracycline hydrochloride (TH) were selected as organic pollutant models to explore the adsorption performances, the maximum adsorption capacities of BMCD-K, BMCD-NA and BMCD-MB were 951, 770, and 1241 mg g−1 for RhB, 975, 1051, and 1105 mg g−1 for TH, respectively, which were higher than those of most adsorbents. This study demonstrated that MB can be used as an effective activator for the preparation of biochar materials with enhanced performance.

Section: Resultsmentioning

confidence: 99%

Cow Dung-Based Biochar Materials Prepared via Mixed Base and Its Application in the Removal of Organic Pollutants

Gao

et al. 2022

IJMS

Env Prog and Sustain Energy

“…In order to evaluate the potential of using La‐CNTs as TC adsorbents, a comparison of the TC maximum adsorption capacities (

Q_{m}

) of various adsorbents is provided in Table 7. The

q_{m}

values for TC adsorption on Fe(III) modified hydroxyapatite, 64 Cu‐immobilized alginate, 65 biochar derived from spent coffee grounds (SCG 500), 66 Fe/Mn oxide‐loaded biochar (FeMn‐BC), 67 BiOI, 68 carbon‐doped boron nitride (BCN), 69 and NiFe 2 O 4 ‐COF nanocomposites (NC) 70 were 45.39 mg/g, 53.26 mg/g, 39.22 mg/g, 14.24 mg/g, 28.35 mg/g, 76.74 mg/g, and 42.91 mg/g, respectively. The

Q_{m}

value obtained in this study (93.46 mg/g) was 2.06, 1.75, 2.38, 6.56, 3.30, 1.21, and 2.18 times higher than the corresponding

{normalq}_{normalm}

values of the other adsorbents reported in Table 7.…”

Section: Resultsmentioning

confidence: 99%

“…In order to evaluate the potential of using La-CNTs as TC adsorbents, a comparison of the TC maximum adsorption capacities (Q m ) of various adsorbents is provided in Table 7. The q m values for TC adsorption on Fe(III) modified hydroxyapatite, 64 Cu-immobilized alginate, 65 biochar derived from spent coffee grounds (SCG 500), 66 Fe/Mn oxide-loaded biochar (FeMn-BC), 67 BiOI, 68 carbon-doped boron nitride (BCN), 69 and NiFe…”

Section: Comparison Of La-cnts With Other Adsorbentsmentioning

confidence: 99%

Preparation, characterization, and adsorption properties of modified carbon nanotubes for highly effective removal of tetracycline from aquaculture wastewater

Zhang

et al. 2022

In this study, the adsorption of the antibiotic compound tetracycline (TC) from aquaculture wastewater was investigated using lanthanum-modified carbon nanotubes (La-CNTs) prepared by impregnation method. The composition and morphology of La-CNTs were characterized by EDS, XRD, and BET analysis. Single-factor experiments were performed to investigate their effect on the adsorption of TC by La-CNTs. The adsorption kinetics and adsorption isotherms indicated that the pseudo-second-order kinetic model and Langmuir adsorption isotherm equation adequately described the adsorption behavior of La-CNTs. Moreover, the maximum adsorption capacity (Q m ) was 93.46 mg/g. The thermodynamics studies indicated that adsorption of TC by La-CNTs were endothermic and spontaneous respectively.Further, the adsorption force of La-CNTs on TC could be attributed to van der Waals force, π-π adsorbate-adsorbent interaction and electrostatic interaction. Based on these experimental results, this novel composite material shows good potential application value for the removal of TC from aquaculture wastewater.

“…CVD, template-directed, direct growth, substitution reaction, and vapor–liquid–solid (VLS) are fabrication techniques that have been performed to synthesize BNNT nanomaterials. − Among the BNNT’s fabrication techniques, CVD is the most popular approach to the large-scale synthesis of BNNT. Moreover, BNNT nanomaterials have been produced using the ZnS templating method, plasma etching, potassium intercalation-induced longitudinal splitting, and in situ unzippings of BNNTs …”

Section: Boron Nitridesmentioning

confidence: 99%

A Comprehensive Review on the Applications of Boron Nitride Nanomaterials in Membrane Fabrication and Modification

Vatanpour

Mehrabani

Keskin

et al. 2021

Ind. Eng. Chem. Res.

Boron nitride (BN) presented enormous potential in the fabrication of novel membranes with superior separation efficiency. Researchers try to produce membranes with high solvent permeability and good rejection performance in industrial applications. In this review, the recent progress in the fabrication of BN-based membranes with different fabrication techniques and various applications is reviewed. Representative studies on applying BN-based membranes in gas separation, proton exchange, electrodialysis, and water filtration membranes to develop their performance and stability, induce antifouling characteristics, and decline the trade-off between selectivity and permeability, together with the explanation of their mechanisms, are discussed. Moreover, various methods of synthesis of BN allotropes are introduced. In addition, a brief review of simulation studies (molecular dynamic and density function theory) on theoretical studies of BN nanosheet membranes was performed. The authors hope that this review will arouse the active interest of many researchers in the further development of the BNs application in membrane science and technology.