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Recent advances in dyes uptake by microplastics in aquatic environments: Influencing factors and ecotoxicological behaviors
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This review examined how microplastics in water environments can absorb and carry dye pollutants, effectively acting as transport vehicles for these contaminants. Researchers found that environmental factors like water salinity, pH, and temperature, as well as the physical properties of the microplastics themselves, all influence how much dye they can absorb, which has implications for understanding combined pollution risks in aquatic systems.
Understanding the adsorption mechanisms and interaction of dye pollutants and microplastics in natural water is vital to evaluating potential risks. This review article discusses the bibliometric analysis and the adsorption behavior of dyes to microplastics. The review also examined the impact of environmental (salinity, pH, and temperature) and physicochemical (particle size and active area) factors on dye uptake by microplastics. The maximum amount of Cyan dye adsorbed onto polyethylene microplastics was reported to be 2874.4 mg/g. Polystyrene (PS) microplastics exhibited the highest adsorption capacity for aniline (0.060 mg/g) due to its surface area of 0.7214 m2/g. In 50 % of dye uptake studies on microplastics, the equilibrium condition was reached within 24 h. However, in a few cases, equilibrium was achieved in 8 days. The desorption efficiency of malachite green in the simulated gastric fluid at high temperatures was 81.4 %. The concentration of dyes in the isotherm studies of their adsorption by microplastics varied widely (5–160 mg/L). According to the criterion of R2 > 0.95, the Langmuir isotherm demonstrates a better fit with the data in most of the studies. The lowest uptake of dyes was observed at a pH of 1.5 under the same conditions. Studies have shown that higher temperatures can increase the ability of microplastics to attract and release organic and inorganic pollutants. The potential ecological effects of ‘microplastic-dye’ on organisms and the methods for removing microplastics were investigated. This paper has provided data for the assessment of the potential risks of ‘microplastic-dye’ to aquatic organisms.
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Adsorption of rhodamine B on polyvinyl chloride, polystyrene, and polyethylene terephthalate microplastics in aqueous environments
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Researchers studied how three common types of microplastics absorb rhodamine B, a toxic dye, from water and found that PVC had the highest absorption capacity. Environmental factors like pH, salt concentration, and temperature significantly influenced how much dye the plastics could absorb. The findings suggest that microplastics in waterways may concentrate toxic chemicals on their surfaces, potentially increasing environmental and health risks beyond the plastics themselves.
Can Microplastics Accumulate Toxic dye in Water? An adsorption-desorption Study under Different Experimental Conditions
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Researchers investigated the adsorption and desorption of the toxic dye Rhodamine B on polystyrene, polypropylene, and polyvinyl chloride microplastics under different experimental conditions. Results showed fast and substantial adsorption of the dye onto all three plastic types, with adsorption coefficients ranging from approximately 1,500 to 2,000, indicating microplastics can act as carriers of toxic dyes in aquatic environments.
Adsorption behavior of organic pollutants and metals on micro/nanoplastics in the aquatic environment
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This review examines how micro- and nanoplastics in aquatic environments adsorb organic pollutants and metals onto their surfaces, effectively acting as carriers for other contaminants. Researchers found that environmental factors like pH, salinity, and aging of the plastic significantly influence this sorption behavior. The findings raise concerns that microplastics may increase the bioavailability and toxicity of chemical pollutants in waterways.
Source, transport, and toxicity of emerging contaminants in aquatic environments: A review on recent studies
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This review examines emerging contaminants in water, with a focus on how microplastics act as carriers for other pollutants due to their strong ability to absorb chemicals. When microplastics carry these hitchhiking pollutants, the combined effect on aquatic organisms can be amplified thousands of times as they move up the food chain. The findings highlight how microplastic pollution does not just add plastic to the environment but also concentrates and transports other harmful chemicals toward humans.
Potential of Adsorption of Diverse Environmental Contaminants onto Microplastics
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Researchers assessed the ability of four common types of microplastics to adsorb hazardous environmental contaminants including dyes and heavy metals. They found that dyes were adsorbed through physical processes while heavy metal adsorption varied by plastic type, with polystyrene showing the highest capacity for certain metals. The study confirms that microplastics can act as vectors for diverse pollutants, potentially increasing the environmental mobility and bioavailability of toxic substances.
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