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20 resultsShowing papers similar to Removal of nanoplastics from aqueous solution by aggregation using reusable magnetic biochar modified with cetyltrimethylammonium bromide
ClearEnhanced polystyrene nanoplastic removal by CTAB-modified magnetic biochar: Adsorption performance and mechanisms
Researchers engineered a CTAB-modified magnetic biochar adsorbent that removes polystyrene nanoplastics with a maximum capacity of 234 mg/g — more than double unmodified biochar — through electrostatic attraction, hydrophobic interactions, and iron oxide surface complexation, while also being easily retrievable with a magnet.
Efficiency of adsorption of PSNPs using spontaneous magnetic biochar prepared from pyrolysis of municipal sludge and industrial red mud solid waste
Researchers prepared a spontaneous magnetic biochar from municipal sludge and industrial red mud waste to remove polystyrene nanoplastics from water. The material achieved a 97.87% removal rate within 30 minutes, with electrostatic interactions identified as the primary adsorption mechanism. The magnetic properties of the biochar enabled easy solid-liquid separation without filtration, offering a practical approach for nanoplastic remediation using waste-derived materials.
A novel polymer coated magnetic activated biochar-zeolite composite for adsorption of polystyrene microplastics: Synthesis, characterization, adsorption and regeneration performance
Researchers developed a new magnetic composite material made from biochar, zeolite, and polymer coatings that can effectively capture microplastics from water. The material removed over 90 percent of test microplastics and could be regenerated and reused multiple times. The study presents a promising, practical approach for filtering microplastics out of contaminated water using materials that can be magnetically recovered.
Chitosan‐assisted magnetic coconut shell biochar for polystyrene microplastic removal: Mechanism and reusability
Researchers created a recyclable magnetic biochar material from coconut shells, modified with chitosan, that removed up to 91% of polystyrene microplastics from water. The material maintained its effectiveness through five consecutive reuse cycles, and water treated with the biochar actually promoted better plant growth, demonstrating practical potential for environmental cleanup.
Removal of polystyrene nanosphere and fragment from aqueous solutions by magnetic biochar derived from crab shell
Researchers developed a magnetic biochar derived from crab shells (M-CSBC) and demonstrated its effectiveness for removing both spherical polystyrene nanoplastics and fragmental polystyrene microplastics from water. The material achieved maximum removal capacities of 90.09 mg/g for nanoplastics and 14.47 g/g for microplastics, following a Langmuir adsorption model, with performance influenced by pH and salinity.
Enhanced removal of aged and differently functionalized polystyrene nanoplastics using ball-milled magnetic pinewood biochars
Researchers developed magnetic biochars from pinewood using ball-milling with iron oxide nanoparticles, achieving highly effective removal of various functionalized and aged polystyrene nanoplastics from water with easy magnetic separation and reusability.
Adsorption and thermal degradation of microplastics from aqueous solutions by Mg/Zn modified magnetic biochars
Researchers developed magnesium- and zinc-modified magnetic biochars that achieved over 94% removal efficiency for polystyrene microplastics from water, with performance enhanced by the metal modifications. The modified biochars also showed effectiveness in thermally degrading the captured microplastics, offering a potential two-step approach for microplastic removal and destruction in water treatment.
Efficient removal of microplastics from aqueous solution by a novel magnetic biochar: performance, mechanism, and reusability
Researchers developed a magnetic biochar from rice husks that achieved 99.96% removal of microplastics from water, with the material showing excellent reusability and performance under various environmental conditions.
Robust polyaniline coating magnetic biochar nanoparticles for fast and wide pH and temperature range removal of nanoplastics and achieving label free detection
Researchers created polyaniline-coated magnetic biochar nanoparticles from agricultural waste and demonstrated they can remove polystyrene nanoplastics from water at 95–99% efficiency across a wide pH range (1–10) and temperature range, while also functioning as an electrochemical sensor for nanoplastic detection down to 1.26 μg/L.
Adsorption and mechanism of magnetically modified industrial hemp straw biochar on microplastics in aqueous solution
A magnetically modified industrial hemp straw biochar adsorbent was developed and tested for removing polystyrene microplastics from groundwater. The KOH-activated, iron-modified biochar achieved efficient MP adsorption through electrostatic attraction and hydrophobic interactions, offering a sustainable low-cost remediation material.
Occurrence and distribution of microplastics in wastewater system and their adsorptive removal using CTAB-modified magnetic biochar from aqueous matrices
Microplastics were detected throughout India's wastewater treatment systems, and a modified magnetic biochar was developed that effectively removes them from water, offering a promising low-cost treatment solution.
Removal of pristine and aged microplastics from water by magnetic biochar: Adsorption and magnetization
Researchers evaluated whether magnetic corncob biochar could effectively remove both pristine and aged polyamide microplastics from water. The study found that aging dramatically changed the surface properties of microplastics, and the biochar removed approximately 97% of aged microplastics compared to only 25% of pristine ones, with smaller particle sizes further improving removal. Evidence indicates that adsorption combined with magnetization offers a practical approach for removing environmentally weathered microplastics from water.
Insights into the removal of polystyrene nanoplastics using the contaminated corncob-derived mesoporous biochar from mining area
Researchers developed a mesoporous biochar from contaminated corncobs collected in mining areas that effectively adsorbs polystyrene nanoplastics from water, achieving high removal capacity through electrostatic and hydrophobic interactions.
Recent advances and factors affecting the adsorption of nano/microplastics by magnetic biochar
This review examines recent advances in using magnetic biochar to adsorb nano- and microplastics from aquatic environments. Researchers found that magnetic biochar offers advantages over traditional biochar by enabling easy separation from water using magnets, avoiding secondary pollution from filtration. The study identifies key factors affecting adsorption efficiency and highlights magnetic biochar as a promising tool for microplastic remediation in contaminated water.
Removal of micro- and nano-plastics from aqueous matrices using modified biochar – A review of synthesis, applications, interaction, and regeneration
This review examines how modified biochar materials can be used to remove micro- and nanoplastics from water. Researchers found that chemical functionalization and nanoparticle integration of biochar significantly improve its ability to capture plastic particles through mechanisms like electrostatic interaction and physical adsorption. The study also highlights challenges in regenerating used biochar for sustainable reuse in water treatment applications.
Efficient removal of nanoplastics by iron-modified biochar: Understanding the removal mechanisms
Researchers created iron-modified biochar from green algae waste to remove nanoplastics from water. The modified biochar achieved a removal capacity three times higher than unmodified biochar, reaching up to 1,626 milligrams per gram, through a two-phase process of adsorption followed by aggregation. The study suggests this material could be recycled and reused at least three times, offering a practical approach to nanoplastic remediation.
Enhanced removal of PVC nanoplastics from water using microwave-activated palm frond biochar
Researchers developed a low-cost sorbent from palm-frond agricultural waste by microwave activation and NaOH treatment, and further produced a magnetically retrievable composite for enhanced removal of PVC nanoplastics from water. The modified palm-frond biochar demonstrated substantially improved nanoplastic adsorption capacity compared to unmodified biochar, offering a sustainable remediation material derived from agricultural waste.
Performance and Mechanism of Sulfathiazole Adsorption by Magnetic Biochar: Promoting Effect of Co-existing Polystyrene and Simultaneous Removal
Researchers synthesized a magnetic biochar and tested its ability to remove the antibiotic sulfathiazole from water containing polystyrene microplastics, finding that the biochar achieved efficient removal of both contaminants simultaneously, with the microplastics actually promoting antibiotic adsorption.
Enrichment of Nanoplastics in Waters Using Magnetic Solid Phase Extraction With Magnetic Biochar Adsorbents and Their Determination by Pyrolysis Gas Chromatography‐Mass Spectrometry
Researchers developed a method combining magnetic biochar with pyrolysis gas chromatography to detect and measure nanoplastics in water at very low concentrations. The magnetic biochar efficiently captured polystyrene nanoplastics from both tap and river water, achieving detection limits below 1 microgram per liter. The approach offers a practical and sensitive tool for monitoring nanoplastic contamination in drinking water sources.
Removal of polystyrene nanoplastics from aqueous solutions by a novel magnetic zeolite adsorbent
Researchers synthesized a magnetic zeolite adsorbent using co-precipitation and tested it for removal of polystyrene nanoplastics from water, achieving a maximum adsorption capacity of 34.2 milligrams per gram. Iron oxide functional groups on the zeolite surface drove nanoplastic capture via electrostatic attraction, complexation, and pi-pi conjugation, and the material could be magnetically separated for reuse.