In this study, the effect of surface modification on the properties of porous biochar was studied, and these modification techniques were synthetically evaluated by principal component analysis. The results showed that surface modification significantly affected the surface and adsorption properties of porous biochar. Potassium carbonate activated porous biochar (KBC) was modified by surface oxidation, surface amination, loading nano-zero valent iron (nZVI) and loading nano-iron oxyhydroxide (nHIO). The surface modification affected the pore structure, especially the micropores. Surface modification influenced the oxygen-containing functional groups, amino, and metal-O significantly. It also changed the diffusion of 2,4-dichlorophenoxyacetic acid (2,4-D) on the biochar surface. The specific surface area was not the only factor determining the adsorption capacity. Surfaces rich in oxygen-containing functional groups would favor the adsorption of 2,4-D by biochar. The adsorption of biochars on 2,4-D were determined by π-π interaction, chemisorption and hydrogen bonding. The synthetic properties of modified biochar were evaluated by principal component analysis, and the comprehensive performance was in order of NKBC > OKBC > KBC > BC > nHIO@KBC > nZVI@KBC. Structural activation, surface amination and surface oxidation can improve the comprehensive properties of biochar.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2018.07.090 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Regenerable chitosan-biochar-TiO composite sponges for hazardous pollutants removal from water: The case of carbamazepine.
Int J Biol Macromol
January 2025
Università degli Studi "Aldo Moro" di Bari, Dipartimento di Chimica, Via Orabona, 4, 70126 Bari, Italy; CNR NANOTEC - Istituto di Nanotecnologia - Sede Secondaria di Bari c/o Dipartimento di Chimica, Università degli Studi di Bari "Aldo Moro", 70126 Bari, Italy.
Water pollution is a significant worldwide problem, and research studies in this field are still in progress to find strategies for removing pollutants from water. Among the others, adsorption process seems to exhibit several advantages, especially when biomasses are in use. This work proposes biochar from olive pomace pyrolysis for adsorbing contaminants from water, in synergistic combination with TiO, for constituting water-stable and recyclable composite chitosan-based sponges.
View Article and Find Full Text PDFApplication of Biochar-Immobilized for Enhancing Phosphorus Uptake and Growth in Rice.
Plants (Basel)
January 2025
State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China.
Phosphorus (P) is an essential nutrient for rice growth, and the presence of phosphate-solubilizing bacteria (PSB) is an effective means to increase soil P content. However, the direct application of PSB may have minimal significance due to their low survival in soil. Biochar serves as a carrier that enhances microbial survival, and its porous structure and surface characteristics ensure the adsorption of .
View Article and Find Full Text PDFAchieving up to 95% removal efficiency of chlorpyrifos pesticide using sugarcane bagasse-based biochar alginate beads in a continuous fixed-bed adsorption column.
Environ Res
January 2025
Department of Chemical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India - 603202.
Pesticide contamination in wastewater poses a significant environmental challenge, driven by extensive agricultural use. This study evaluates the removal of chlorpyrifos (CPS) using sugarcane bagasse-based biochar alginate beads in a continuous fixed-bed adsorption column, achieving a remarkable 95-98% removal efficiency. Compared to conventional adsorbents like activated carbon, which typically show CPS adsorption capacities ranging from 50-70 mg g⁻ under similar conditions, the biochar alginate beads demonstrate better performance with a sorption capacity of 91.
View Article and Find Full Text PDFApplication of molten salt thermoelectric effect in biomass preparation of hydrogen-rich gas, porous biochar and molten salt regeneration.
Sci Total Environ
January 2025
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China.
Hydrogen production from biomass pyrolysis is attractive since it allows for green hydrogen production through feedstock and thermal conversion. However, the key limiting factors for hydrogen production are the high oxygen content, uneven heating of biomass pellets during the slow heating process, and insufficient depolymerization due to low reaction temperatures (low gas yields and low hydrogen content). To address these challenges, fast pyrolysis of super Arundo in NaOH-NaCO molten salt was carried out in this paper at 450 °C, 550 °C and 650 °C.
View Article and Find Full Text PDFImpact of carrier capacitance on Geobacter enrichment and direct interspecies electron transfer under anaerobic conditions.
Bioresour Technol
January 2025
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin 150090 China. Electronic address:
Direct interspecies electron transfer (DIET) enhances anaerobic digestion by facilitating electron exchange between electroactive bacteria and methanogenic archaea. While Geobacter species are recognized for donating electrons to methanogens via DIET, they are rarely detected in mixed microbial communities. This study examined various non-electrode biological carriers (zeolite, carbon cloth, activated carbon and biochar) to promote Geobacter cultivation under anaerobic conditions and identify pivotal factors influencing their symbiosis with methanogens.
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!