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61,005 resultsShowing papers similar to Effects of chemical pretreatments on microplastic extraction in sewage sludge and their physicochemical characteristics
ClearPretreatment methods for the isolation of microplastics from wastewater and sludge samples: Part 1
This article reviews pretreatment methods used to isolate microplastics from wastewater and sludge samples, covering the first part of a multi-part technical overview published in a Polish engineering journal. The review addresses the procedural steps required to separate microplastic particles from complex environmental matrices prior to identification and quantification.
Optimised reduction of total solids and organic matter of sewage sludge matrix for an improved extraction of microplastics
Researchers optimized chemical digestion protocols for extracting microplastics from sewage sludge, finding that maximizing reduction of total solids and organic carbon content significantly improved the reliability and efficiency of subsequent density-based microplastic separation.
Optimization of a method used for extracting microplastics from an organic matter-rich matrix and isolated particles assessment
Researchers optimized a method for extracting microplastics from sewage sludge — a challenging organic-rich matrix — by combining density separation and chemical digestion steps, improving recovery rates and enabling more accurate characterization of sludge-associated microplastics.
Pretreatment methods for the isolation of microplastics from wastewater and sludge samples Part 2
This article reviews pretreatment methods for isolating microplastics from wastewater and sludge samples, examining digestion, density separation, and filtration approaches to optimize sample preparation for downstream identification and quantification.
A novel method for organic matter removal from samples containing microplastics
Researchers developed a novel organic matter removal method for wastewater treatment plant sludge samples containing microplastics, demonstrating that the approach is more time- and cost-effective than existing techniques while preserving microplastic integrity for accurate quantification and identification.
Microplastics in Sewage Sludge: Effects of Treatment
This study examined the effects of various sewage sludge treatment processes on microplastic content, finding that treatment methods differ substantially in their ability to reduce microplastic concentrations before sludge is disposed of or land-applied.
Sampling, pre-treatment, and identification methods of microplastics in sewage sludge and their effects in agricultural soils: a review
This review examines methods for sampling, pre-treating, and identifying microplastics in sewage sludge, which accumulates microplastics removed during wastewater treatment. Researchers found that standardized protocols for sludge analysis are still lacking, making it difficult to compare results across studies. The study also highlights that when microplastic-laden sludge is applied to agricultural soils, it may introduce persistent plastic contamination into terrestrial ecosystems.
Effect of Chemical Agents on the Morphology and Chemical Structures of Microplastics
Researchers investigated how common chemical pretreatment agents — including strong acids, bases, and oxidizing agents — alter the morphology and chemical structure of various microplastics, providing guidance for optimizing microplastic sample preparation protocols.
Microplastics in seawater: a study of pretreatment, separation, and recovery.
Researchers developed and compared pretreatment, separation, and recovery methods for extracting microplastics from seawater samples, evaluating each step for efficiency and contamination risk. The optimized workflow improved particle recovery and reduced matrix interference, supporting more accurate seawater microplastic quantification.
COD as a Dynamic Tool for Pretreatment of Sludge Samples in Microplastic Analysis
Researchers evaluated chemical oxygen demand (COD) treatment as a pretreatment step to improve microplastic extraction from sewage sludge samples. The approach effectively removed organic interference, making it easier to accurately count and identify plastic particles in a matrix that typically complicates analysis.
Microplastics extraction from wastewater treatment plants: Two-step digestion pre-treatment and application
Researchers developed an optimized two-step digestion method for extracting microplastics from wastewater treatment plant samples, achieving high recovery rates especially in organic-rich matrices like sludge, and applied it across multiple treatment stages.
Effects of microplastics on the properties of different types of sewage sludge and strategies to overcome the inhibition: A review
This review examined how microplastics trapped in sewage sludge during wastewater treatment affect sludge properties, microbial communities, and treatment efficiency, while discussing strategies to overcome microplastic-induced inhibition of sludge processing.
Validation of Sample Preparation Methods for Microplastic Analysis in Wastewater Matrices—Reproducibility and Standardization
Sample preparation methods for microplastic analysis in wastewater were validated against reference standards to assess recovery rates and reproducibility. The validation study identified methods that reliably extract microplastics from complex wastewater matrices, supporting more consistent environmental monitoring of microplastic discharge from treatment plants.
Combined application of analytical techniques for microplastic determination to achieve comprehensive results for sewage sludge samples
Researchers combined multiple analytical techniques for comprehensive microplastic determination in sewage sludge samples, addressing the challenge that more than 90% of microplastics entering wastewater treatment plants are retained in sludge and require robust multi-method characterization.
Optimization and application of pretreatment method of microplastics detection in municipal solid waste landfills
Researchers compared different pretreatment digestion methods for detecting microplastics in municipal solid waste landfill samples, establishing which protocols best remove organic matter without degrading the plastic particles themselves.
Degradation of common polymers in sewage sludge purification process developed for microplastic analysis
Researchers developed a three-step sewage sludge purification method and tested its effects on seven common plastic types. Most polymers survived largely intact, supporting the method's use for microplastic analysis, though some materials showed minor surface changes.
Comparison of pre-treatment methods and heavy density liquids to optimize microplastic extraction from natural marine sediments
Researchers compared multiple pre-treatment methods and density separation liquids for extracting microplastics from marine sediments, identifying optimised protocols that improved recovery rates and reduced contamination, supporting the development of more standardised monitoring approaches.
A method for the characterisation of microplastics in sludge
Researchers developed a method for detecting and characterizing microplastics in sewage sludge, which concentrates the majority of microplastics removed during wastewater treatment. This method is important because sludge is widely spread on agricultural land, making it a key pathway for microplastics entering soils.
Leaching behavior of microplastics during sludge mechanical dewatering and its effect on activated sludge
Researchers studied how mechanical dewatering of sewage sludge affects the microplastics embedded within it, including their physical changes and leaching behavior. They found that the dewatering process roughened microplastic surfaces, reduced particle sizes, and altered their chemical properties due to dewatering agents and mechanical forces. The study also showed that leachates from these processed microplastics could negatively affect activated sludge performance in treatment systems.
Methods for separating microplastics from complex solid matrices: Comparative analysis
Separation methods for extracting microplastics from complex solid matrices including soil, sediment, and sludge were systematically compared, evaluating density separation, oil extraction, electrostatic separation, and other approaches. The review provides guidance for choosing appropriate separation methods depending on matrix composition and target microplastic characteristics.
Oil-based extraction as an efficient method for the quantification of microplastics in environmental samples
Researchers validated an oil-based extraction method for pulling microplastics out of sewage sludge and organic-rich soils, finding that pre-treating samples with Fenton's reagent (which destroys organic matter) improved recovery rates to nearly 100% for some plastic types. The study advances efforts to standardize microplastic measurement in complex environmental samples where current methods vary widely.
Microplastic isolation method for wastewater and sludge samples by removal of excess organic and inorganic interferences
Researchers developed an improved microplastic isolation method for wastewater and sludge samples that removes extracellular polymeric substances (EPS) interfering with detection. The optimized protocol improves the accuracy and reliability of microplastic quantification in complex environmental matrices.
Microplastic extraction protocols can impact the polymer structure
Researchers found that common laboratory extraction protocols used to isolate microplastics from environmental samples can alter the polymer structure of the particles, potentially skewing identification and quantification results.
Microplastics Removal from Municipal Wastewater Through Oxide-Biological Processes. Phase 1: Preliminary Fragmentation of Microplastics from Wastewater and Aerobic Pre-conditioning of Wastewater with Activated Sludge
Researchers tested a combined treatment approach for removing microplastics from municipal wastewater, involving mechanical fragmentation followed by biological treatment with activated sludge. The preliminary results suggest that oxidative pre-treatment can reduce microplastic particle size, potentially making them more amenable to biological breakdown in wastewater systems.