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61,005 resultsShowing papers similar to Hexavalent Chromium Pollution and its Sustainable Management through Bioremediation
ClearComparison of Hexavalent Chromium Adsorption Behavior on Conventional and Biodegradable Microplastics
Researchers compared hexavalent chromium adsorption behavior on conventional versus biodegradable microplastics, finding that polymer chemistry and surface aging significantly affect chromium binding capacity and the risk of co-transport in contaminated environments.
Polyamide microplastics as better environmental vectors of Cr(VI) in comparison to polyethylene and polypropylene microplastics
Researchers found that polyamide microplastics adsorb more hexavalent chromium (Cr(VI)) than polyethylene or polystyrene microplastics, with UV aging increasing adsorption capacity, making polyamide particles potentially more dangerous environmental vectors for this toxic heavy metal.
Sorptive behaviour of chromium on polyethylene microbeads in artificial seawater
This laboratory study examined how chromium — a toxic heavy metal — adsorbs onto polyethylene microbeads in artificial seawater, finding that microplastics can accumulate chromium at concentrations far above those in surrounding water. The results support the concern that microplastics act as vectors concentrating heavy metal pollutants in marine environments.
Heavy Metal Pollution in Coastal Environments: Ecological Implications and Management Strategies: A Review
This review examines heavy metal pollution in coastal environments, covering sources like industrial runoff and agriculture, ecological impacts, and cleanup strategies. While focused on heavy metals rather than microplastics, it is relevant because microplastics often carry heavy metals on their surface, potentially increasing human exposure to these toxic substances through the food chain.
Adsorption mechanism of hexavalent chromium on electron beam-irradiated aged microplastics: Novel aging processes and environmental factors
Researchers used electron beam irradiation as a novel method to age polypropylene microplastics and then studied how these aged particles adsorb hexavalent chromium from water. They found that aging dramatically increased the microplastics' ability to bind chromium by generating oxygen-containing functional groups on their surfaces. The study highlights that weathered microplastics in the environment may have a significantly greater capacity to concentrate heavy metal pollutants than fresh plastic particles.
Nitric Acid-Treated Blue Coke-Based Activated Carbon’s Structural Characteristics and Its Application in Hexavalent Chromium-Containing Wastewater Treatment
This study developed a nitric acid-modified activated carbon from blue coke powder for removing hexavalent chromium from wastewater. While focused on heavy metal removal, the research is relevant to broader water treatment challenges where microplastics and chemical pollutants co-occur in industrial effluents.
Microplastics as an emerging vector of Cr(VI) in water: Correlation of aging properties and adsorption behavior
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.
Exposure to Environmentally Relevant Concentrations of Polystyrene Microplastics Increases Hexavalent Chromium Toxicity in Aquatic Animals
Researchers found that environmentally relevant concentrations of polystyrene microplastics significantly increased the toxicity of hexavalent chromium across multiple aquatic species, acting as vectors that amplify heavy metal harm.
Effects of chlorination on microplastics pollution: Physicochemical transformation and chromium adsorption
Researchers found that chlorination of polyethylene and thermoplastic polyurethane microplastics significantly altered their surface morphology and oxygen-containing functional groups, enhancing their ability to aggregate and adsorb chromium contaminants in water.
Comparing the influence of humic/fulvic acid and tannic acid on Cr(VI) adsorption onto polystyrene microplastics: Evidence for the formation of Cr(OH)3 colloids
Researchers compared how humic/fulvic acid and tannic acid affect chromium(VI) adsorption onto polystyrene microplastics, finding that dissolved organic matter promotes the formation of Cr(OH)3 colloids, complicating the role of microplastics as heavy metal vectors.
From cosmetics to Contamination: Microplastics in personal care products as vectors for chromium in aquatic environments
This study tested facial scrubs sold in India and found that most contained plastic microbeads, then measured how well those microbeads absorb the toxic heavy metal chromium under different environmental conditions. The microbeads readily picked up chromium from water, with absorption increasing at higher temperatures and certain pH levels. This shows that microplastics from personal care products can act as carriers for heavy metals once they reach waterways, creating a combined pollution threat.
The photo-redox of chromium regulated by microplastics (MPs) and MPs-derived dissolved organic matter (MPs-DOM) and the CO2 emission of MPs-DOM
Researchers found that microplastics and their derived dissolved organic matter regulate the photo-redox transformation of chromium in wastewater, with UV exposure converting less toxic Cr(III) to more hazardous Cr(VI) while microplastic-derived organic matter influences this process and contributes to CO2 emissions.
Adsorption behaviour of microplastics on the heavy metal Cr(VI) before and after ageing
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.
New Insight into the Performance and Self-Defensive Responses of the Algal–Bacterial Granular Sludge Process under Cr(VI)-Induced Stress
This paper is not about microplastics. It investigates how chromium(VI), a heavy metal contaminant, affects the performance of algal-bacterial granular sludge used in wastewater treatment, examining the microorganisms' stress responses and pollutant removal capabilities. The study focuses on heavy metal remediation technology with no connection to microplastic pollution.
Translating particulate hexavalent chomium-induced chromosome instability, loss of homologous recombination repair and targeting of RAD51 from human lung fibroblasts to human bronchial epithelial cells.
Scientists found that hexavalent chromium, a carcinogen found near industrial sites, damages DNA repair mechanisms in human lung cells by inhibiting a key repair protein. While focused on occupational chemical exposure rather than microplastics, this research illustrates how industrial pollutants that co-occur with microplastics can cause lasting genetic damage.
Aging amplifies synergistic adsorption and reduction of Cr(VI) by polyamide microplastics
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.
The mechanism for adsorption of Cr(VI) ions by PE microplastics in ternary system of natural water environment
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.
Remediation of Heavy Metal Contaminated Soil Using Potential Microbes Isolated from a Closed Disposal Site
Bacteria isolated from a closed landfill site were tested for their ability to remove heavy metals from contaminated soil, with promising results for lead and chromium removal. Microorganisms that can clean up metal-contaminated soils are relevant to the broader challenge of remediating sites contaminated with plastic-associated heavy metals.
Electron beam synergetic removal of microplastics and hexavalent chromium: Synergetic removal process and mechanism
Electron beam irradiation was tested as a method to simultaneously degrade PVC microplastics and reduce toxic hexavalent chromium (Cr(VI)) in contaminated water, finding a synergistic effect where treating both together improved chromium removal from 57% to 92% compared to treating either contaminant alone. The mechanism involves electron beam aging of PVC generating reactive compounds that chemically reduce chromium, while the chromium in turn accelerates PVC breakdown. This dual-pollutant removal approach offers a novel strategy for treating industrial wastewater containing both plastic debris and heavy metal contamination.
Histopathological Analysis of Hexavalent Chromium Toxicity to Ovary and Testis of Freshwater Food Fish, Channa punctatus (Bloch. 1793)
This paper is not about microplastics — it studies the toxic effects of hexavalent chromium (a heavy metal) on the reproductive organs of a freshwater fish species.
Preparation and characterization of Allium cepa extract coated biochar and adsorption performance for hexavalent chromium
Researchers fabricated Allium cepa extract-coated biochar and evaluated its adsorption performance for removing hexavalent chromium from contaminated water. The modified biochar demonstrated improved uptake of the toxic metal ion compared to uncoated material, with the plant extract coating enhancing surface chemistry and binding capacity.
Synergistic Effects of Earthworms and Plants on Chromium Removal from Acidic and Alkaline Soils: Biological Responses and Implications
Not relevant to microplastics — this study examines how earthworms and plants work together to remove chromium from contaminated soils, testing bioremediation effectiveness across different soil acidities and pollution levels.
Industrial lignins as efficient biosorbents for Cr(vi) water remediation: transforming a waste into an added value material
Researchers demonstrated that industrial lignins and lignin-based materials can effectively remove hexavalent chromium from water, transforming a paper industry byproduct into an efficient biosorbent for heavy metal remediation in a circular economy approach.
Bioremediation for Environmental Pollutants
This book chapter reviews bioremediation techniques for removing hazardous chemicals from contaminated soil and water, covering heavy metals, dyes, and other industrial pollutants. Bioremediation approaches including microbial and plant-based methods are also being explored for removing microplastics from contaminated environments.