We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
The Role of Surface Functionalization of Nanoplastics in Enhancing the Adsorption and Catalytic Reduction of Chromium (VI) by Supported Silver Nanoparticles: A Comparative Analysis
AI summary Read the abstract
This review examined how surface functionalisation of nanoplastics influences their performance as supports for silver nanoparticles in the adsorption and catalytic reduction of hexavalent chromium (Cr(VI)) from contaminated water. Researchers compared functionalised nanoplastic-AgNP composites across different surface chemistries and found that surface charge and functional groups strongly govern both Cr(VI) capture and reduction efficiency.
Hexavalent chromium (Cr(VI)) remains one of the most persistent and toxic environmental contaminants, driving urgent research into sustainable remediation strategies. This review critically examines the role of surface-functionalized nanoplastics as supports for silver nanoparticles (AgNPs) in enhancing Cr(VI) adsorption and catalytic reduction. Synthesizing evidence from 24 peer-reviewed studies published between 2010 and 2025, we evaluate how functional groups (–COOH, –NH₂, –OH, sulfonation) influence adsorption capacity, redox kinetics, recyclability, and stability. Functionalization was found to modulate surface charge, hydrophilicity, and electron transfer dynamics, with oxygen- and nitrogen-rich groups consistently delivering superior performance under acidic conditions. Comparative analyses reveal adsorption capacities up to 574 mg/g and rapid reduction efficiencies exceeding 95%, supported by pseudo-first- and second-order kinetic models. However, challenges remain in translating laboratory successes to real wastewater systems due to co-ion competition, natural organic matter fouling, and Ag⁺ leaching. Furthermore, lifecycle risks posed by nanoplastic degradation and secondary microplastic release demand safe-by-design strategies and rigorous environmental validation. By integrating mechanistic insights with sustainability and scalability considerations, this review highlights functionalized nanoplastic–AgNP composites as promising yet transitional materials. Future directions include hybrid catalysts, biopolymer-derived supports, and policy frameworks to bridge the gap between innovation and real-world deployment.
More Papers Like This
Aging amplifies synergistic adsorption and reduction of Cr(VI) by polyamide microplastics
AI summary Read the abstract
Researchers found that UV and chemical aging of polyamide microplastics amplified their adsorption and reduction of hexavalent chromium Cr(VI), increasing oxygen-containing functional groups while reducing amide bonds, with Cr(VI) binding driven by electrostatic forces and hydrogen bonds and the aged microplastics able to reduce Cr(VI) to less toxic Cr(III) even under UV light and oxygen-depleted conditions.
Adsorption behaviour of microplastics on the heavy metal Cr(VI) before and after ageing
AI summary Read the abstract
Researchers studied how UV aging affects the adsorption of hexavalent chromium onto PE, PS, and PA microplastics, finding that aged microplastics had significantly enhanced adsorption capacity due to increased surface area and functional group changes from weathering.
Microplastics as an emerging vector of Cr(VI) in water: Correlation of aging properties and adsorption behavior
AI summary Read the abstract
Researchers studied the correlation between aging properties and adsorption of hexavalent chromium Cr(VI) onto polyethylene microplastics under accelerated UV aging conditions, finding that aging-induced changes in surface chemistry increased the adsorption capacity. Aged microplastics may act as more effective vectors for toxic heavy metals in aquatic environments.
Adsorption and Desorption Behavior of Cr(VI) on Two Typical UV-Aged Microplastics in Aqueous Solution
AI summary Read the abstract
Researchers examined how UV weathering changes the ability of two common microplastic types (polyethylene and polystyrene) to adsorb and release chromium(VI) from contaminated water. UV aging altered surface chemistry and significantly increased adsorption capacity for the toxic heavy metal.
The mechanism for adsorption of Cr(VI) ions by PE microplastics in ternary system of natural water environment
AI summary Read the abstract
Researchers investigated how polyethylene microplastics adsorb hexavalent chromium (Cr(VI)) from water in the presence of the surfactant sodium dodecyl benzene sulfonate (SDBS), finding that SDBS enhanced Cr(VI) adsorption at pH below 6 but competed with chromate ions for adsorption sites at pH above 6. Increasing PE microplastic dosage raised Cr(VI) adsorption capacity substantially, providing mechanistic insight into pollutant co-transport on microplastics in natural water systems.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.