Article
Chemistry, Multidisciplinary
Linda Maria Bannwart, Thomas Muentener, Michel Rickhaus, Lukas Jundt, Daniel Haeussinger, Marcel Mayor
Summary: The study presents and discusses the synthesis and spatial arrangement of the novel diacetylene bridged terphenylic macrocycle 1, as well as its limited stability in the presence of molecular oxygen. The synthesis is largely based on acetylene scaffolding strategies and the dynamic enantiomerization process is explored.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Dylan M. Oney, Jeffrey A. Nason
Summary: The study confirmed that the proportion of particle surfaces coated by organic matter can predict attachment efficiencies, and the formation of eco-coronas has a significant impact on heteroaggregation of particles.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Article
Polymer Science
Chao Li, Li Han, Xiping Chen, Xinyu Bao, Qi Sun, Hongwei Ma, Yang Li
Summary: Monodisperse discrete oligomers with a tailored sequence of linkages were constructed through Ugi four-component reactions and hydrosilylation cycles. The impact of the tectonic sequence on the properties of isomeric oligomers was verified through experimental measurements and molecular dynamic simulations, showing different folding ways of the molecular chains due to the difference in linkage sequences. This study explores a novel tectonic sequence of isomeric oligomers, offering a model to increase understanding of how a molecular chain's 3D structure is formed driven by chain folding.
Article
Environmental Sciences
Jun Zhao, Jun Tang, Tinghui Dang
Summary: The interaction between CeO2 NPs and different SMPs is influenced by surface properties, with EPS inhibiting heteroaggregation with positively charged goethite while its influence on negatively charged SMPs depends more on steric stabilization. EPS may enhance CeO2 NPs migration in the environment, increasing risks to human health and ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Manuella Cerbelaud, Yasmine Bennani, Claire Peyratout
Summary: This study investigates the behavior of suspensions composed of a mixture of particles with positive and negative charges, created by the adsorption of poly-electrolyte multilayers on their surface. The study shows that surface modifications allow for heteroaggregation in the absence of salt, and the addition of salt has a different effect on the suspension behavior depending on the number of adsorbed layers. This study highlights the importance of studying heteroaggregation in these systems as a simple way to analyze the screening effect.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Environmental
Xia Liu, Pingping Song, Ruyi Lan, Rubi Zhao, Runze Xue, Jian Zhao, Baoshan Xing
Summary: Graphene oxide (GO) interacts with nanoparticles (NPs) in aquatic environments, forming heteroaggregates. The shapes of TiO2 NPs, pH, concentration ratio, and pre-homoaggregation time affect the heteroaggregation. Natural organic matter (NOM) inhibits GO-TiO2 heteroaggregation, while strong disturbance can break down the heteroaggregates.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Ya-Ping Ou, Xiaofei Yang, Zishun Lin, Lingqiao Kong, Sheng Hua Liu
Summary: Isomeric diruthenium complexes with bis(ethynyl)pyridine as a bridge core were prepared and characterized. The electrochemical properties and absorption spectra of the complexes were investigated, and the results showed that the N atom position and distance between redox metal centers affected their properties.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Robert M. Wheeler, Steven K. Lower
Summary: Aggregation is a crucial process for understanding the behavior of anthropogenic particles in aquatic environments. The model predicts that homoaggregation is negligible and at least 10% of nanoparticles or microplastics may remain unaggregated despite favorable bonding conditions for heteroaggregation. The study emphasizes the importance of considering disaggregation in the context of both heteroaggregation and homoaggregation of anthropogenic and natural particles.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Engineering, Environmental
Wenpei Wu, Xueyan Chen, Lu Han, Lei Yang, Mingyue Gu, Jing Li, Mengfang Chen
Summary: The heteroaggregation mechanism between nZVI and four types of natural soil nanoparticles from northern and southern China was studied. It was found that stable nZVI-SNPs heteroaggregates were formed at low ionic strength, but SNPs accelerated the aggregation of nZVI at high ionic strength. The differences in heteroaggregation rates of nZVI with four SNPs were negligible.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Jiayan Wu, Jieyu Liu, Pingxiao Wu, Leiye Sun, Meiqing Chen, Zhongbo Shang, Quanyun Ye, Nengwu Zhu
Summary: This study systematically investigated the interaction between polystyrene nanoplastics (PSNPs) and Al2O3 under different conditions. It was found that significant heteroaggregation occurred between PSNPs and Al2O3 under acidic and neutral conditions. The NaCl concentration and pH values influenced the deposition of PSNPs on Al2O3 surfaces. Humic acid and fulvic acid prevented the deposition of PSNPs, with humic acid being more effective. The research provides insights into the migration and fate of PSNPs in aquatic environments.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Ethan Hicks, Mark R. Wiesner
Summary: The study investigated the design options for implementing bacteriophages as targeted bacterial inactivation agents in water treatment systems. It focused on heteroaggregation, where phages attach to non-host background particles. The study found that heteroaggregation between bacteriophages and kaolinite occurred rapidly, likely driven by extended DLVO forces. The findings suggest that when using bacteriophages as inactivation agents, they should be used after particle separation processes to reduce the likelihood of scavenging through attachment to particulate matter rather than the targeted bacteria.
Article
Environmental Sciences
Xing Li, Hao Qiu, Peihua Zhang, Lan Song, Ana Romero-Freire, Erkai He
Summary: This study investigates the interaction between nanoplastics and algal cells using poly-styrene nanoparticles with different sizes and surface charges. The results show that large-sized nanoparticles cause toxicity due to heteroaggregation and shading effects, while the toxicity of small-sized nanoparticles is controlled by surface charge and concentration.
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Applied
Shasha Guo, Ya Zhu, Wenyang Xu, Siqi Huan, Jun Li, Tao Song, Long Bai, Orlando J. Rojas
Summary: This study demonstrates the use of complexes of cellulose nanocrystals and nanochitin to stabilize oil-in-water Pickering emulsions. The formation of large heteroaggregates under slightly net neutral conditions results in unstable emulsions, while net cationic conditions lead to non-deformable emulsion droplets with high stability. The study highlights the possibilities of controlling emulsion properties by adjusting the CNC/NCh ratio or charge stoichiometry.
CARBOHYDRATE POLYMERS
(2023)
Article
Environmental Sciences
Jiayan Wu, Quanyun Ye, Peiran Li, Leiye Sun, Minye Huang, Jieyu Liu, Zubair Ahmed, Pingxiao Wu
Summary: This study systematically investigated the heteroaggregation behavior between polystyrene nanoplastics (PSNPs) and goethite (FeOOH). It was found that surface functionalized PSNPs showed significantly faster heteroaggregation rate with FeOOH, while the increase in solution pH significantly inhibited heteroaggregation. The electrostatic force and chemical bonding were identified to play important roles in the heteroaggregation process. This work provides a theoretical basis for predicting the environmental behavior between PSNPs and FeOOH.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Gabriela Hul, Agathe Martignier, Stephan Ramseier Gentile, Stephane Zimmermann, Pascal Ramaciotti, Pauline Perdaems, Serge Stoll
Summary: The production and use of plastics, along with poor recycling practices, have led to increased discharge of plastic waste into water systems. This study investigates the adsorption process of polystyrene nanoplastics (NPLs) onto quartz sand, a filter medium in a drinking water treatment plant. The results show that NPLs are mainly adsorbed to the sand surface through electrostatic interactions, and environmental conditions significantly modify the adsorption capacity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)