Heteroaggregation of nanoplastics with oppositely charged minerals in aquatic environment: Experimental and theoretical calculation study

Wu, Jiayan; Ye, Quanyun; Wu, Pingxiao; Xu, Shanrong; Liu, Yanjun; Ahmed, Zubair; Rehman, Saeed; Zhu, Ning

doi:10.1016/j.cej.2021.131191

Cited by 39 publications

(19 citation statements)

References 51 publications

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“…This Feature Article will focus on heteroaggregation in a dispersion of oppositely charged binary colloids, which has been a subject of intense research lately. ,− The electrostatic attraction between oppositely charged particles, referred to as electrostatic heteroaggregation (EHA), is the fundamental driving mechanism for heteroaggregation in a dispersion of oppositely charged colloids. The kinetic stability of colloidal particles in a dispersion can be quantified by DLVO (Derjaguin–Landau–Verway–Overbeek) theory which states that the overall particle–particle interaction potential is given by the summation of attractive van der Waals (vdW) interactions and repulsive electrical double-layer (EDL) interactions.…”

Section: Electrostatic Heteroaggregation (Eha)mentioning

confidence: 99%

Electrostatic Heteroaggregation: Fundamentals and Applications in Interfacial Engineering

et al. 2023

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The aggregation of oppositely charged soft materials (particles, surfactants, polyelectrolytes, etc.) that differ in one or more physical or chemical attributes, broadly referred to as electrostatic heteroaggregation, has been an active area of research for several decades now. While electrostatic heteroaggregation (EHA) is relevant to diverse fields such as environmental engineering, food technology, and pharmaceutical formulations, more recently there has been a resurgence to explore various aspects of this phenomenon in the context of interface stabilization and the development of functional materials. In this Feature Article, we provide an overview of the recent contributions of our group to this exciting field with particular emphasis on fundamental studies of electrostatic heteroaggregation between oppositely charged systems in the bulk, at interfaces, and across the bulk/interface. The influence of the size and shape of particles and the surface charge of heteroaggregates on the formation of Pickering emulsions and their utilization in the development of porous ceramics is discussed.

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Section: Electrostatic Heteroaggregation (Eha)mentioning

confidence: 99%

Electrostatic Heteroaggregation: Fundamentals and Applications in Interfacial Engineering

et al. 2023

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“…This will identify interferences and potential false positive or false negative results Test the bioaccumulation of a contaminant in the absence of the NMP By comparing the bioaccumulation of a contaminant in the presence and absence of the NMP, it is possible to assess if there is a vector effect All co-contaminant bioaccumulation studies If biomarkers are also evaluated, it may be helpful to include a NMP only control; it may also be important to confirm uptake of the NMP Zero-hour control 64,92,93 Add the NMPs at a certain step of the assay and then immediately perform the remainder of the assay without modification; this differs from the typical approach in that there is no exposure period after the NMPs are added container, 44 flotation on the air−water interface, 45,46 and sedimentation of the particles out of the suspension after homo-or heteroagglomeration. 47,48 Sedimentation can potentially be accelerated in the presence of test organisms by agglomeration during passage through the organism or by attachment to suspended cells (e.g., algae, bacteria). 40,49,50 For other types of exposure systems, the size of the particles can impact function of the exposure test method.…”

Section: ■ Dosimetry Issues During Toxicity Testsmentioning

confidence: 99%

“…For exposure systems where exposure occurs to organisms with suspended particles in the test media (e.g., algae, fish), potential sources of bias include adsorption to sidewalls of the container, flotation on the air–water interface, , and sedimentation of the particles out of the suspension after homo- or heteroagglomeration. , Sedimentation can potentially be accelerated in the presence of test organisms by agglomeration during passage through the organism or by attachment to suspended cells (e.g., algae, bacteria). ,, For other types of exposure systems, the size of the particles can impact function of the exposure test method. For example, microplastic particles could potentially clog the channels in microphysiological devices, which often have cross-channels smaller than 1 mm, or flow-through systems with aerosolized particles .…”

Section: Dosimetry Issues During Toxicity Testsmentioning

confidence: 99%

Potential Artifacts and Control Experiments in Toxicity Tests of Nanoplastic and Microplastic Particles

Petersen

Barrios

Henry

et al. 2022

Environ. Sci. Technol.

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To fully understand the potential ecological and human health risks from nanoplastics and microplastics (NMPs) in the environment, it is critical to make accurate measurements. Similar to past research on the toxicology of engineered nanomaterials, a broad range of measurement artifacts and biases are possible when testing their potential toxicity. For example, antimicrobials and surfactants may be present in commercially available NMP dispersions, and these compounds may account for toxicity observed instead of being caused by exposure to the NMP particles. Therefore, control measurements are needed to assess potential artifacts, and revisions to the protocol may be needed to eliminate or reduce the artifacts. In this paper, we comprehensively review and suggest a next generation of control experiments to identify measurement artifacts and biases that can occur while performing NMP toxicity experiments. This review covers the broad range of potential NMP toxicological experiments, such as in vitro studies with a single cell type or complex 3-D tissue constructs, in vivo mammalian studies, and ecotoxicity experiments testing pelagic, sediment, and soil organisms. Incorporation of these control experiments can reduce the likelihood of false positive and false negative results and more accurately elucidate the potential ecological and human health risks of NMPs.

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“…The concentration of mono-and divalent ions reported for freshwater bodies rarely exceeds ~50 mM for Na + and ~2.5 mM for Ca 2+ . Therefore, it is likely that most NPL suspensions are stable in natural freshwater ecosystems since their CCC values are considerably higher [63] . However, freshwater may contain other substances than those reviewed here that could co-occur with NPLs and modify the stability of their suspensions.…”

Section: Physicochemical Behavior Of Npls In Freshwatermentioning

confidence: 99%

Nanoplastic toxicity towards freshwater organisms

Tamayo-Belda¹,

Pulido-Reyes²,

Rosal³

et al. 2022

Water Emerg Contam & Nanoplastics

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The fragmentation of plastic litter into smaller fragments, known as microplastics and nanoplastics, as well as their toxicity and environmental distribution have become issues of high concern. Furthermore, the popularization of bioplastics as a greener substitute of conventional plastics represents a challenge for the scientific community in view of the limited information concerning their potential environmental impact. Here, we systematically review the recent knowledge on the environmental fate and toxicity of nanoplastics in freshwater environments, discuss the results obtained thus far, and identify several knowledge gaps. The sources and environmental behaviors of nanoplastics are presented considering in vitro, in vivo, and in silico studies with a focus on real exposure scenarios. Their effects on organisms are classified based on their impact on primary producers, primary consumers, and secondary consumers. This review covers the main results published in the last four years, including all relevant experimental details and highlighting the most sensitive toxicity endpoints assessed in every study. We also include more recent results on the potential environmental impact of biodegradable plastics, a type of material belonging to the category of bioplastics for which there are still scarce data. This review identifies a need to perform studies using secondary nanoplastics rather than synthetic commercial materials as well as to include other polymers apart from polystyrene. There is also an urgent need to assess the possible risk of nanoplastics at environmentally realistic concentrations using sublethal endpoints and long-term assays.

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Heteroaggregation of nanoplastics with oppositely charged minerals in aquatic environment: Experimental and theoretical calculation study

Cited by 39 publications

References 51 publications

Electrostatic Heteroaggregation: Fundamentals and Applications in Interfacial Engineering

Electrostatic Heteroaggregation: Fundamentals and Applications in Interfacial Engineering

Potential Artifacts and Control Experiments in Toxicity Tests of Nanoplastic and Microplastic Particles

Nanoplastic toxicity towards freshwater organisms

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