Опубликована: Янв. 1, 2023
Язык: Английский
Molecules, Год журнала: 2024, Номер 29(2), С. 418 - 418
Опубликована: Янв. 15, 2024
In the present investigation of copper ferrite, a CuFe2O4 nanocomposite adsorbent was synthesized using sol–gel method, and its relevance in adsorptive elimination toxic Congo red (CR) aqueous phase examined. A variety structural methods were used to analyze nanocomposite; as-synthesized had agglomerated clusters with porous, irregular, rough surface that could be seen FE-SEM, it also contained carbon (23.47%), oxygen (44.31%), (10.21%), iron (22.01%) elemental composition by weight. Experiments designed achieve most optimized system through utilization central composite design (CCD). The highest uptake CR dye at equilibrium occurred when initial pH value 5.5, adsorbate concentration 125 mg/L, dosage 3.5 g/L. Kinetic studies conducted, they showed adsorption process followed pseudo-second-order (PSO) model (regression coefficient, R2 = 0.9998), suggesting chemisorption mechanism, overall reaction rate governed both film pore diffusion molecules. which molecules taken up onto particle revealed interactions involving electrostatic forces, hydrogen bonding, filling. According isotherm studies, data exhibited strong agreement Langmuir (R2 0.9989), demonstrating maximum monolayer capacity (qmax) 64.72 mg/g 6 302 K. Considering obtained negative ΔG positive ΔHads ΔSads values across all tested temperatures thermodynamic investigations, confirmed characterized as endothermic, spontaneous, feasible, an increased level randomness. developed this study is anticipated find extensive application effluent treatment, owing excellent reusability remarkable capability effectively remove comparison other adsorbents.
Язык: Английский
Процитировано
9
Nanomaterials, Год журнала: 2024, Номер 14(12), С. 1037 - 1037
Опубликована: Июнь 16, 2024
With the processes of industrialization and urbanization, heavy metal ion pollution has become a thorny problem in water systems. Among various technologies developed for removal ions, adsorption method is widely studied by researchers nanomaterials with good performances have been prepared during past decades. In this paper, variety novel excellent Pb(II) Cu(II) reported recent years are reviewed, such as carbon-based materials, clay mineral zero-valent iron their derivatives, MOFs, nanocomposites, etc. The extremely high capacity, selectivity particular nanostructures summarized introduced, along advantages disadvantages. And, some future research priorities treatment wastewater also prospected.
Язык: Английский
Процитировано
9
Molecules, Год журнала: 2023, Номер 28(11), С. 4526 - 4526
Опубликована: Июнь 2, 2023
The toxicity of dyes has a long-lasting negative impact on aquatic life. Adsorption is an inexpensive, simple, and straightforward technique for eliminating pollutants. One the challenges facing adsorption that it hard to collect adsorbents after adsorption. Adding magnetic property makes easier adsorbents. current work reports synthesis iron oxide-hydrochar composite (FHC) oxide-activated hydrochar (FAC) through microwave-assisted hydrothermal carbonization (MHC) technique, which known as timesaving energy-efficient method. synthesized composites were characterized using various techniques, such FT-IR, XRD, SEM, TEM, N2 isotherm. prepared applied in cationic methylene blue dye (MB). formed crystalline oxide amorphous hydrochar, with porous structure rod-like oxide. pH point zero charge (pHpzc) 5.3 5.6, respectively. Approximately 556 mg 50 MB was adsorbed surface 1 g FHC FAC, respectively, according maximum capacity calculated Langmuir model.
Язык: Английский
Процитировано
15
International Journal of Environmental Research, Год журнала: 2025, Номер 19(4)
Опубликована: Апрель 16, 2025
Язык: Английский
Процитировано
0
Energies, Год журнала: 2024, Номер 17(11), С. 2698 - 2698
Опубликована: Июнь 2, 2024
In this investigation, Zn/Al carbonate layered double hydroxide (ZAC-LDH) and its derived material on calcination were synthesized for removing the anionic azo dye Congo red (CR) from wastewater. Numerous factors methodically investigated, including temperature, adsorbent dosage, pH, starting Dye Concentration (DC), contact time. The CR elimination percentage dropped as initial DC increased 25 mg/L to 100 at 30 °C uncalcined LDH, 97.96% 89.25% calcined LDH. pH analysis indicates that highest level of removal was recorded within acidic range through electrostatic attraction mechanism. sorption kinetics results demonstrated pseudo-second-order kinetic model exhibited a stronger fit both LDH CZA-LDH, with maximum correlation coefficient value. Van’t Hoff plots indicate spontaneous nature physisorption process negative ΔG° (<−20 kJ/mol), while endothermic adsorption positive ΔH°. X-ray diffraction reveals significant intercalation molecules, prior following adsorption, showcasing distinctive memory effect. Brunauer–Emmett–Teller (BET) gas measurements performed support mesoporous ZAC-LDH CZA-LDH. FTIR spectrum confirms interaction molecules surface These findings emphasize efficacy LDHs in dye, CZA-LDH demonstrating superior efficiency compared context
Язык: Английский
Процитировано
3
Biomass Conversion and Biorefinery, Год журнала: 2024, Номер unknown
Опубликована: Июнь 20, 2024
Язык: Английский
Процитировано
3
Surfaces and Interfaces, Год журнала: 2024, Номер unknown, С. 105366 - 105366
Опубликована: Окт. 1, 2024
Язык: Английский
Процитировано
2
Bioresource Technology Reports, Год журнала: 2023, Номер 24, С. 101670 - 101670
Опубликована: Окт. 20, 2023
Язык: Английский
Процитировано
2
DYNA, Год журнала: 2024, Номер 91(232), С. 9 - 15
Опубликована: Апрель 18, 2024
Synthetic colorants are widely used globally by different industries for the dyeing process. However, these chemicals pollute environment and affect human health causing allergies, hives, dermatitis, cancer. This study aims to compare effectiveness of duckweed (Lemna minor) in removal Methylene Blue (MB) Congo red (CR) dyes at concentrations (1 mg/L, 5 10 15 mg/L). Absorbance values were determined 665 nm MB 497 CR after 96 hours. The results show higher compared all (95.49 % vs. 59.32%, 1 mg/L; 97.24% 39.43%, 5mg/L; 91.30% vs 28.47%, 10mg/L; y 85.42% 20.27%, 15mg/L). was observed 30 min contact with duckweed, while 24 hours concentrations.
Язык: Английский
Процитировано
0
Опубликована: Янв. 1, 2024
Inorganic and organic pollutants usually coexist in practical wastewater, leading to difficult co-removal processes due their different physiochemical properties. In this study, the palygorskite nanosheets loaded hydrochar (PNLH) was synthesized for mercury (Hg) methylene blue (MB) co-contaminated wastewater. The physicochemical characteristics of PNLH were investigated comprehensively, maximum capacity Hg(II) MB reached 148.69 153.06 mg/g, respectively. Based on analysis, surface interactions between with included complexation, hydrogen bonding, pore filling, etc. More importantly, performance improved Hg(II)-MB binary system, while synergistic effects attributed bridging formation complexations MB. density functional theory (DFT) method applied demonstrate that oxygen-containing groups such as O-Mg, O-Al, -OH introduced by clay greatly enhanced interactions, adsorption mechanism also elucidated. regeneration experiments, column studies, economic feasibility analysis further demonstrated practicality effluent purification. This study provides a solution environmental remediation materials dealing inorganic-organic co-polluted
Язык: Английский
Процитировано
0