Enhanced Adsorption of Cadmium by a Covalent Organic Framework-Modified Biochar in Aqueous Solution

Toxics, Journal Year: 2024, Volume and Issue: 12(10), P. 717 - 717

Published: Sept. 30, 2024

In the environmental field, advancement of new high-efficiency heavy metal adsorption materials remains a continuous research focus. A novel composite, covalent organic framework-modified biochar (RH-COF), was fabricated via an in-situ polymerization approach in this study. The COF-modified characterized by elemental analysis, BET SEM, FT-IR, and XPS. nitrogen oxygen content modified material increased significantly from 0.96% 15.50% to 5.40% 24.08%, respectively, indicating addition substantial number nitrogen- oxygen-containing functional groups RH-COF surface, thereby enhancing its capacity for Cd 4.20 mg g−1 58.62 g−1, representing approximately fourteen-fold increase. Both pseudo-second-order model Langmuir were suitable describing kinetics isotherms Cd2+ onto RH-COF. performance showed minimal sensitivity pH values between 4.0 8.0, but could be slightly influenced ionic strength. Mechanistic analysis that on dominated surface complexation chelation, alongside electrostatic adsorption, precipitation, Cπ–cation interactions. Overall, these findings suggest synthesis COF-biochar composite may serve as promising remediation strategy while providing scientific support applying COF materials.

Language: Английский

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Preparation of printing and dyeing sludge biochar/macromolecule polymer microsphere as a non-sacrificial persulfate activator with excellent reusability and reduced heavy metals leaching

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156726 - 156726

Published: Oct. 1, 2024

Language: Английский

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Simple synthesis of K/P co-doped graphitic carbon nitride to enhance photocatalytic performance under simulated solar irradiation

Environmental Research, Journal Year: 2024, Volume and Issue: 264, P. 120314 - 120314

Published: Nov. 7, 2024

Language: Английский

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Degradation mechanism and toxicity assessment of clofibric acid by Fe ²⁺ /PS process in saline pharmaceutical wastewater

Environmental Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 13

Published: Nov. 28, 2024

A considerable effort has been made to exploring the oxidation of clofibric acid (CA) in advanced processes (AOPs). However, few studies are available on degradation mechanism and toxicity assessment CA saline pharmaceutical wastewater. Here effect chlorine kinetics by Fe2+/ persulfate (PS) process were studied. Oxidation efficiency, mineralisation, intermediate by-products, reactive oxygen species (ROS) examined. Notably, a high removal efficiency (70.91%) but low mineralisation (20.99%) observed at pH 3.0 during Fe2+/PS system. Furthermore, we found Cl− exerted beneficial impact degradation. degree was relatively minor. Under salinity (100 mM) condition, primary within system SO⋅−4, OH·, Cl2/HClO, Fe(IV). Several undesirable chlorinated by-products formed. reasonable pathway proposed. According ecological structure–activity relationship (ECOSAR) programme, some transformation products exhibited higher levels than itself both acute chronic assessment, especially high-salinity environments. These findings elucidate an increased challenges risk for treatment

Language: Английский

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Innovative Use of Wood Ash for Fluoride Removal from Water: Comprehensive Experiments and Mechanism Insight

Applied Sciences, Journal Year: 2024, Volume and Issue: 15(1), P. 245 - 245

Published: Dec. 30, 2024

This study investigates the potential of wood ash (WA), a by-product wood-based energy production, as an eco-friendly alternative for removing fluoride from water. Kinetic analysis revealed that WA enables rapid removal, reaching equilibrium within 1 h (112.09 ± 3.9 mg/g). Equilibrium demonstrated exhibits Langmuir maximum capacity 157.34 mg/g, indicating high adsorption ranks top 10% reported adsorbents (34th out 328). According to thermodynamic analysis, process appears be both endothermic and spontaneous at elevated temperatures. pH dependence studies showed while peaked under acidic conditions, it remained relatively stable (116.01 0.8 mg/g) over wide range levels (5 11). An optimal dosage 6.67 g/L achieved greater than 98% removal rate. Coexisting anions affected WA, with order influence being PO43− > CO32− >> SO42− NO3− ≈ Cl−. Mechanistic analyses confirmed surface precipitation CaF2 primary mechanism responsible removal. With Ca content 66 wt.%, facilitates enhanced Overall, this highlights efficacy sustainable adsorbent water, contributing valorization in wastewater treatment applications.

Language: Английский

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Textile waste-derived functional carbon materials for selective pharmaceutical pollutant removal

Alexandria Engineering Journal, Journal Year: 2024, Volume and Issue: 116, P. 321 - 330

Published: Dec. 31, 2024

Language: Английский

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