Biochar has a great potential in the stabilization of soil heavy metals; however, the application can actually enhance the mobility of Arsenic (As) in soil. Here, a biochar-coupled calcium peroxide system was proposed to control the increase in As mobility caused by biochar amendment in paddy soil environment. The capability of rice straw biochar pyrolyzed at 500 °C (RB) and CaO to control As mobility was evaluated by incubation for 91 days. CaO encapsulation was performed for pH control of CaO, and As mobility was evaluated using a mixture of RB + CaO powder (CaO-p), and RB + CaO bead (CaO-b), respectively. The control soil solely and RB alone were included for comparison. The combination of RB with CaO exhibited remarkable performance in controlling As mobility in soil, and As mobility decreased by 40.2% (RB + CaO-p) and 58.9% (RB + CaO-b) compared to RB alone. The result was due to high dissolved oxygen (6 mg L in RB + CaO-p and RB + CaO-b) and calcium concentrations (296.3 mg L in RB + CaO-b); oxygen (O) and Ca derived from CaO is able to prevent the reductive dissolution and chelate-promoted dissolution of As bound to iron (Fe) oxide by biochar. This study revealed that the simultaneous application of CaO and biochar could be a promising way to mitigate the environmental risk of As.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2023.138321 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
An in situ reactive zone approach using calcium peroxide for the remediation of benzene and chlorobenzene in groundwater: A field study.
J Environ Manage
December 2024
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 211135, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address:
There is a gap in understanding the different contributions of biodegradation and free radical oxidation using calcium peroxide (CaO) for the remediation of mixed contaminants of benzene and chlorobenzene in groundwater. In this study, the remedial efficiency and mechanisms of benzene and chlorobenzene co-contaminants using CaO were explored by an integrated approach of field study and laboratory validation. It was found that in the field demonstration program, the radius of influence for each injection point using Geoprobe direct-push was larger than the designed value of 0.
View Article and Find Full Text PDFIn Situ Gelling Silk Fibroin/ECM Hydrogel With Sustained Oxygen Release for Neural Tissue Engineering Applications.
J Biomed Mater Res A
January 2025
Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
In situ gelling, cell-laden hydrogels hold promise for regenerating tissue lesions with irregular shapes located in complex and hard-to-reach anatomical sites. A notable example is the regeneration of neural tissue lost due to cerebral cavitation. However, hypoxia-induced cell necrosis during the vascularization period imposes a significant challenge to the success of this approach.
View Article and Find Full Text PDFCopper(II) Oxide Spindle-like Nanomotors Decorated with Calcium Peroxide Nanoshell as a New Nanozyme with Photothermal and Chemodynamic Functions Providing ROS Self-Amplification, Glutathione Depletion, and Cu(I)/Cu(II) Recycling.
ACS Appl Mater Interfaces
December 2024
Bioengineering Division, Hacettepe University, Ankara 06800, Turkey.
Uniform, mesoporous copper(II) oxide nanospindles (CuO NSs) were synthesized via a method based on templated hydrothermal oxidation of copper in the presence of monodisperse poly(glycerol dimethacrylate--methacrylic acid) nanoparticles (poly(GDMA--MAA) NPs). Subsequent decoration of CuO NSs with a CaO nanoshell (CuO@CaO NSs) yielded a nanozyme capable of Cu(I)/Cu(II) redox cycling. Activation of the Cu(I)/Cu(II) cycle by exogenously generated HO from the CaO nanoshell significantly enhanced glutathione (GSH) depletion.
View Article and Find Full Text PDFEvaluating the Impact of Phosphorus and Solid Oxygen Fertilization on Snap Bean ( L.): A Two-Year Field Study.
Plants (Basel)
December 2024
Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA.
The snap bean ( L.) is highly sensitive to both phosphorus (P) deficiency and hypoxic stress, which together can significantly hinder plant growth, nutrient uptake, and yield; however, limited information exists on the effect of P and oxygen (O) fertilization to alleviate these stresses and enhance yield. A two-year field experiment assessed the effects of P and O fertilization on plant growth, pod yield, and P uptake in acidic sandy soil.
View Article and Find Full Text PDFGSH-Depleting and HO Self-Supplying Calcium Peroxide-Based Nanoplatforms for Efficient Bacterial Eradication via Photothermal-Enhanced Chemodynamic Therapy.
ACS Appl Mater Interfaces
December 2024
State Key Laboratory of Advanced Materials Synthesis and Processing Technology, Wuhan University of Technology, Hubei Provincial Biomedical Materials and Engineering Research Center, Wuhan 430070, China.
Article Synopsis
- To overcome these challenges, researchers created a multifunctional nanoplatform (CSPC) that generates hydrogen peroxide, depletes glutathione, and has photothermal properties, enhancing CDT.
- The CSPC nanomaterials showed strong antibacterial effects, completely eradicating bacteria and significantly improving wound healing when tested under near-infrared light.
Want 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!