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20 resultsShowing papers similar to Impact of Chlorine or UV/H2O2 on Microplastics Under Conditions Representative of Drinking Water Treatment
ClearImpact of chlorine and UV/H2O2 on microplastics in drinking water
Using chlorine and UV/hydrogen peroxide at dosages realistic for actual drinking water treatment plants, this study assessed whether standard disinfection processes alter microplastics in tap water. The work addresses a critical public health question — whether the water treatment people rely on to make tap water safe actually removes or changes the microplastics that have been detected in treated drinking water.
Modifications of ultraviolet irradiation and chlorination on microplastics: Effect of sterilization pattern
Researchers found that both UV irradiation and chlorination used in drinking water treatment alter the surface properties, size distribution, and chemical composition of microplastics, with combined treatments producing greater modifications and potentially increasing the release of plastic additives and adsorbed contaminants.
Secondary risks induced by polyethylene microplastics during the disinfection processes of chlorination, UV irradiation, and ozone treatment
Polyethylene microplastics subjected to chlorination, UV irradiation, and ozone treatment at drinking-water-relevant doses showed minimal biotoxicity changes, suggesting that standard disinfection processes do not significantly increase the hazard posed by plastic particles in water.
Unveiling the optical and molecular characteristics of aging microplastics derived dissolved organic matter transformed by UV/chlor(am)ine oxidation and its potential for disinfection byproducts formation
Researchers studied how UV light and common water disinfection chemicals break down microplastics in water and found that different treatment methods produce different types of dissolved organic matter from the plastic. Some treatment combinations, particularly UV with chlorine, created byproducts that could form harmful disinfection byproducts when water is later chlorinated. This is important because it means water treatment processes might unintentionally create new toxic compounds from the microplastics already present in water.
Disinfection impacts: Effects of different disinfection treatments on common polymer types to guide the identification of polymers of concern in the water industry
Researchers tested how common water disinfection methods, including chlorination and chloramination, affect seven types of plastic particles at different doses and pH levels. They found that both treatments caused measurable physical and chemical changes to the polymers, with some plastics showing significant surface degradation and chemical alterations. The findings suggest that water treatment processes may unintentionally transform microplastics in ways that could affect their environmental behavior and potential health impacts.
Microplastic removal in conventional drinking water treatment processes: Performance, mechanism, and potential risk
Researchers tested how well conventional drinking water treatment processes remove microplastic particles ranging from 10 to 90 micrometers in diameter. They found that larger particles were effectively removed by coagulation and sand filtration, but about 16% of the smallest particles passed through. The study also discovered that UV-based disinfection can fragment remaining microplastics into even smaller pieces and increase water toxicity, suggesting current treatment methods may need improvement.
Effects of UV light on physicochemical changes in thermoplastic polyurethanes: Mechanism and disinfection byproduct formation
Researchers examined how UV light exposure changes the properties of thermoplastic polyurethane microplastics in water and whether those changes affect the formation of harmful disinfection byproducts during water chlorination. They found that UV exposure broke the plastic into smaller fragments and released soluble chemicals that significantly increased byproduct formation after chlorination. The findings suggest that aging microplastics in water systems could contribute to the creation of potentially harmful chemicals during standard water treatment.
Insight into the dynamic transformation properties of microplastic-derived dissolved organic matter and its contribution to the formation of chlorination disinfection by-products
Researchers studied how dissolved organic matter released from microplastics transforms under UV light and how it contributes to the formation of harmful disinfection byproducts during water chlorination. They found that UV exposure changed the chemical composition of the microplastic-derived organic matter, affecting its reactivity during disinfection. The findings suggest that microplastics in water sources may indirectly increase the formation of potentially harmful chemicals during standard water treatment.
Pre-oxidization-induced change of physicochemical characteristics and removal behaviours in conventional drinking water treatment processes for polyethylene microplastics
Researchers investigated how pre-oxidation treatments alter the physicochemical properties of polyethylene microplastics and found that oxidation changed surface characteristics and influenced removal efficiency during conventional drinking water treatment processes.
UV aging of microplastic polymers promotes their chemical transformation and byproduct formation upon chlorination
Researchers studied how UV aging of different microplastic polymers affects their behavior during water chlorination treatment. They found that UV aging significantly increased the reactivity of polyamide and polyester microplastics, promoting the release of harmful organic compounds and the formation of disinfection byproducts by more than 10-fold. The study reveals that weathered microplastics in drinking water systems may generate more toxic byproducts during standard chlorination than their pristine counterparts.
Insight into the chemical transformation and organic release of polyurethane microplastics during chlorination
Scientists investigated what happens to polyurethane microplastics during water chlorination, a standard step in water treatment. They found that chlorination breaks down the plastic surface and releases organic chemicals, especially from UV-weathered particles, which produced significantly more leached compounds. The findings suggest that water treatment processes themselves may inadvertently release harmful byproducts from microplastics.
The potential risks posed by micro-nanoplastics to the safety of disinfected drinking water
This review examines the risks that micro- and nanoplastics pose to the safety of disinfected drinking water. Researchers found that common disinfection processes like ozone, chlorine, and UV treatment can actually make plastics more harmful by promoting leaching of organic compounds and generating disinfection byproducts. The study suggests that enhanced treatment technologies such as advanced coagulation, membrane filtration, and improved detection methods are needed to effectively remove these contaminants and prevent secondary hazards.
Volatile organic compounds generation pathways and mechanisms from microplastics in water: Ultraviolet, chlorine and ultraviolet/chlorine disinfection
Researchers examined how UV, chlorine, and combined UV/chlorine disinfection treatments cause microplastics to release volatile organic compounds, identifying distinct degradation pathways for polypropylene, polystyrene, and PVC that generate diverse chemical byproducts in treated water.
Impact of non-aged and UV-aged microplastics on the formation of halogenated disinfection byproducts during chlorination of drinking water and its mechanism
Researchers investigated how both new and UV-aged microplastics affect the formation of halogenated disinfection byproducts during chlorine treatment of drinking water. They found that non-aged microplastics reduced byproduct formation by adsorbing organic precursors, while UV-aged microplastics had a much smaller reduction effect because they release organic compounds that offset adsorption. The study reveals that environmental aging of microplastics changes their impact on drinking water treatment chemistry in important ways.
Insight into the effect of UVC-based advanced oxidation processes on the interaction of typical microplastics and their derived disinfection byproducts during disinfection
Scientists found that UV-based water treatment processes, while intended to clean drinking water, caused microplastics to release more organic matter and form more disinfection byproducts during chlorination. Up to 42% of the toxic byproducts formed were absorbed back onto the microplastic surfaces, creating contaminated particles. This concerning finding suggests that some common water treatment methods could unintentionally make microplastic contamination in drinking water more hazardous.
Investigation of the effect of microplastics on the UV inactivation of antibiotic-resistant bacteria in water
Researchers found that polyethylene and polyvinyl chloride microplastics significantly reduced UV disinfection effectiveness against antibiotic-resistant bacteria, as bacteria associated with microplastic surfaces were shielded from UV exposure, creating a potential public health concern.
Transformation of microplastics during UV-LED based water disinfection: Mechanistic insights and environmental implications
Researchers investigated how UV-based water disinfection treatments transform the physical and chemical properties of common microplastics like polystyrene, polyethylene, and PVC. They found that treatment created surface cracks, reduced water repellency, and generated various breakdown compounds, some of which showed toxicity to aquatic organisms. The study highlights that while UV disinfection effectively treats pathogens, it may inadvertently create new environmental risks by altering microplastics in the water supply.
The fate of microplastics and organic matter leaching behavior during chlorination
Researchers studied how chlorination affects polystyrene and polyethylene microplastics and the organic matter they release, finding that chlorination promoted organic carbon leaching from microplastics at about 0.3 to 0.5 parts per thousand of the plastic mass. The leached organic matter showed significant potential to form trihalomethane and haloacetonitrile disinfection byproducts, raising concerns about chlorinated microplastics in drinking water systems.
Ultraviolet-C and vacuum ultraviolet inducing surface degradation of microplastics
Researchers studied how UV-C and vacuum ultraviolet irradiation affect the surfaces of four common microplastic types during water disinfection. They found that standard UV doses used in wastewater treatment had little effect, but higher doses caused significant surface cracking, chemical bond breakdown, and changes in hydrophobicity. The study suggests that UV disinfection in wastewater plants can alter microplastic surface properties, which may affect how these particles interact with pollutants and organisms downstream.
Quantifying the effects of chlorine disinfection on microplastics by time-resolved inductively coupled plasma-mass spectrometry
Researchers used time-resolved mass spectrometry to measure how chlorine disinfection during water treatment chemically modifies microplastics. They found that about half of polystyrene microplastics became chlorinated at typical treatment doses, and that UV pre-treatment increased their reactivity to chlorine. Cell viability tests revealed that chlorinated microplastics caused significantly higher rates of cell death in human cell lines, suggesting that water treatment processes may inadvertently make microplastics more toxic.