Effective removal of As5+ from aqueous medium using date palm fiber biochar/chitosan/glutamine nanocomposite: kinetic and thermodynamic studies DOI Creative Commons
A. Khalifa, Laila M. Alshandoudi, Asaad F. Hassan

и другие.

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Окт. 24, 2024

Abstract In the current work, three adsorbent materials were developed; biochar derived from date palm fiber (C), biochar/chitosan nanoparticles (CCS), and composite supplemented with glutamine (CCSG). These compounds used as solid adsorbents to remove As5+ polluted water. Several characterization approaches investigate all synthesized adsorbents, including TGA, N2 adsorption/desorption isotherm, SEM, TEM, ATR-FTIR, zeta potential. CCSG demonstrated good thermal stability, a maximum specific surface area of 518.69 m2/g, microporous radius 0.97 nm, total pore volume 0.25 cm3/g, an average particle size 38 pHpzc 6.9. To optimize reaction conditions, various sorption factors examined, contact time, pH, initial concentration, dosage, temperature, ionic strength. The study found that modified samples able more (CCS; 256.0 mg/g CCSG; 376.0 mg/g) than unmodified ones (C; 150.5 mg/g). removal procedure corresponded well Langmuir isotherm model. Thermodynamic kinetic experiments show Elovich, PFO, Van't Hoff plot endothermic, spontaneous, physisorption nature are best fitted models. EDTA has highest desorption efficiency percentage (98.8%). enhanced reusability after six application cycles adsorption/desorption, only 4% decrease in adsorption. This demonstrates effectively wastewater use agricultural waste residues (date fiber; DPF) for environmental remediation purposes.

Язык: Английский

Effective removal of As5+ from aqueous medium using date palm fiber biochar/chitosan/glutamine nanocomposite: kinetic and thermodynamic studies DOI
A. Khalifa, Laila M. Alshandoudi, Asaad F. Hassan

и другие.

Environmental Science and Pollution Research, Год журнала: 2025, Номер unknown

Опубликована: Янв. 20, 2025

Язык: Английский

Процитировано

2
Smartphone-enabled mesoporous silica nanotube chemosensors for quick and selective mercury detection in water and cosmetics DOI Creative Commons
Albandary Almahri, Nashwa M. El‐Metwaly

Arabian Journal of Chemistry, Год журнала: 2024, Номер 17(10), С. 105984 - 105984

Опубликована: Сен. 3, 2024

The pervasive presence of mercury in water and cosmetics poses significant health risks, necessitating the development a method for in-situ monitoring extraction ions. This study introduces novel approach utilizing Mesoporous Silica Nanotubes (MSNTs) with unique worm-like structure, providing an expansive surface area ideal adsorption Hg2+ ion chromophore, N,N,N,N′-Tetramethyl-4,4′-diaminobenzophenone. configuration enables rapid visible detection toxic mercury, color transition from yellow to green that is easily discernible by naked eye. sensitivity Mercury nano-sensor (MNS) remarkably high, limit 1.9 × 10-8 M as determined digital image analysis, 4.9 via spectrophotometric methods—both well below WHO guidelines drinking water. MNS's low threshold, coupled its reusability after simple regeneration, positions it effective tool preliminary testing. findings suggest MNS, requiring only 10 mg measurements, offers promising solution real-time visualization ions, enhancing safety measures cosmetic products.

Язык: Английский

Процитировано

2
Smartphone-enabled composite of cellulose nanocrystals for rapid and selective mercury detection in cosmetics and water: insights from density functional theory studies DOI
Abdu Subaihi, Ahmed Alharbi

International Journal of Environmental & Analytical Chemistry, Год журнала: 2024, Номер unknown, С. 1 - 17

Опубликована: Сен. 29, 2024

Язык: Английский

Процитировано

0
Effective removal of As5+ from aqueous medium using date palm fiber biochar/chitosan/glutamine nanocomposite: kinetic and thermodynamic studies DOI Creative Commons
A. Khalifa, Laila M. Alshandoudi, Asaad F. Hassan

и другие.

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Окт. 24, 2024

Abstract In the current work, three adsorbent materials were developed; biochar derived from date palm fiber (C), biochar/chitosan nanoparticles (CCS), and composite supplemented with glutamine (CCSG). These compounds used as solid adsorbents to remove As5+ polluted water. Several characterization approaches investigate all synthesized adsorbents, including TGA, N2 adsorption/desorption isotherm, SEM, TEM, ATR-FTIR, zeta potential. CCSG demonstrated good thermal stability, a maximum specific surface area of 518.69 m2/g, microporous radius 0.97 nm, total pore volume 0.25 cm3/g, an average particle size 38 pHpzc 6.9. To optimize reaction conditions, various sorption factors examined, contact time, pH, initial concentration, dosage, temperature, ionic strength. The study found that modified samples able more (CCS; 256.0 mg/g CCSG; 376.0 mg/g) than unmodified ones (C; 150.5 mg/g). removal procedure corresponded well Langmuir isotherm model. Thermodynamic kinetic experiments show Elovich, PFO, Van't Hoff plot endothermic, spontaneous, physisorption nature are best fitted models. EDTA has highest desorption efficiency percentage (98.8%). enhanced reusability after six application cycles adsorption/desorption, only 4% decrease in adsorption. This demonstrates effectively wastewater use agricultural waste residues (date fiber; DPF) for environmental remediation purposes.

Язык: Английский

Процитировано

0