This paper discusses Cd(II) and Pb(II) sorption efficiency of biochars modified by impregnation with magnetic particles. All selected biochar characteristics were significantly affected after the modification. More specifically, the cation exchange capacity increased after the modification, except for grape stalk biochar. However, the changes in the pH value, PZC, and BET surface after modification process were less pronounced. The metal loading rate was also significantly improved, especially for Cd(II) sorption on/in nut shield and plum stone biochars (10- and 16-times increase, respectively). The results indicated that cation exchange (as a metal sorption mechanism) was strengthened after Fe oxide impregnation, which limited the desorbed amount of tested metals. In contrast, the magnetization of grape stalk biochar reduced Pb(II) sorption in comparison with that of pristine biochar. Magnetic modification is, therefore, more efficient for biochars with well-developed structure and for more mobile metals, such as Cd(II).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2015.12.056 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
High-Performance TiCT-MXene/Mycelium Hybrid Membrane for Efficient Lead Remediation: Design and Mechanistic Insights.
ACS Appl Mater Interfaces
January 2025
Department of Materials Design and Innovation, University at Buffalo, Buffalo, New York 14260-1660, United States.
This study presents a hybrid microfiltration technology designed for high-performance lead (Pb(II)) remediation, especially from aqueous solutions with high Pb(II) concentrations, by utilizing two-dimensional (2D) TiCT-MXene layers deposited on dry mycelium membranes. The hybrid TiCT-MXene/mycelium (MyMX) membranes were fabricated via a single-step electrochemical deposition (ECD) technique, which enabled a uniform coating of 2D TiCT-MXene onto individual hyphal fibers of a prefabricated mycelium membrane. Optimized ECD parameters for high Pb(II) uptake were identified using scanning electron microscopy and energy-dispersive X-ray spectroscopy.
View Article and Find Full Text PDFSorption of metal ions onto PET-derived microplastic fibres.
Environ Sci Process Impacts
December 2024
School of Chemistry and Chemical Engineering, University of Surrey, Guildford, Surrey GU2 7XH, UK.
Article Synopsis
- This study explored how microplastic polyester fibers, specifically polyethylene terephthalate (PET), can absorb various metal ions found in sewage.
- The research found that PET fibers could effectively retain metal ions like lead, cadmium, and mercury, with lead showing the highest absorption capacity.
- The findings suggest that when these microplastics are present in sewage treatment, they can contribute to the transfer of hazardous metals into the environment, particularly when sewage sludge is used on agricultural land.
Smart Hydrogel Based on Derivatives of Natural α-Amino Acids for Efficient Removal of Metal Ions from Wastewater.
Gels
August 2024
Faculty of Chemistry, University of Warsaw, 1 Pasteura, PL 02-093 Warsaw, Poland.
A novel class of hydrogels, rich in a variety of functional groups capable of interacting/complexing with metal ions was successfully synthesized. This was achieved by using acryloyl derivatives of natural α-amino acids, specifically ornithine and cystine. The δ-amino group of ornithine was modified with an acryloyl group to facilitate its attachment to the polymer chain.
View Article and Find Full Text PDFEnhanced sorbent properties by synergistic effect of biomass extract functional groups for effective uranium uptake from aqueous system.
Environ Res
December 2024
Department of Chemistry, Faculty of Science, University of Sarajevo, Zmaja od Bosne 33-35, 71000, Sarajevo, Bosnia and Herzegovina; International Society of Engineering Science and Technology, United Kingdom.
Adsorption for uranium removal from aqueous systems has been extensively studied, due to its many advantages. However, the great costs and complexity of many sorbent preparation methods are still restricting the progress. Hence, this research aimed to introduce a novel, simple and green method for enhancing Amberlite IR-120 properties for U(VI) removal.
View Article and Find Full Text PDFPhotoaged tire wear particles hinder the transport of Pb(II) in urban soils under acid rain: Experimental and numerical investigations.
Water Res
November 2024
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
Rapid urbanization brought lots of serious environmental contamination, including the accumulation of heavy metals, acid rain, and the emission of tire wear particles (TWPs), with detrimental effects for terrestrial ecosystems. Nevertheless, how naturally aged TWPs affect the mobilization of heavy metals in soils under acid rain is still unclear. Here, we investigate the adsorption and transport mechanisms of Pb(II) co-existing with acid rainwater in soil-TWP mixtures via batch experiments, column experiments and modeling.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!