Nanoplastics enhance florfenicol toxicity by disturbing detoxification and metabolic processes in nematodes.

Nanoplastics (NPs) and antibiotics are ubiquitous contaminants that frequently coexist and undergo interactions in various environments. While their combined toxicity is known to depend on NP physicochemical properties, the mechanistic basis of their toxicological interactions, particularly how surface charge and particle size modulate combined effects, remains unclear. Using as a model, we investigated the combined toxicity of florfenicol (FF) with four polystyrene nanoplastics (PS-NPs) differing in size (100 nm (PS-100) and 500 nm (PS-500)) and surface modification (-NH (PS-NH) and -COOH (PS-COOH)), and the mechanisms were explained through integrated analyses of bioaccumulation, detoxification gene expression, and metabolic homeostasis.

High-throughput screening of combined toxicity of nanoplastics and scoexisting pollutants using luminescent bacterium.

Micro/nanoplastics (MNPs) commonly coexist with contaminants such as heavy metals and antibiotics in aquatic environments, potentially inducing complex joint toxicity. However, conventional approaches for MNP-pollutant combined toxicity assessment are typically challenged by inefficiencies, high costs, and labor-intensive procedures. In this study, a high-throughput platform using microplate-based inhibition assays with a luminescent bacterium (Vibrio qinghaiensis sp.

Melatonin as a multifaceted stress protector in rice: Mechanisms, synergies, and knowledge gaps.

Rice productivity, a cornerstone of global food security, is increasingly threatened by a spectrum of abiotic and biotic stressors, including heavy metal toxicity, salinity, drought, temperature extremes, flooding/water logging, nutrient deficiencies, and pathogens or pest infestations. Melatonin (N-acetyl-5-methoxytryptamine), also referred to as phytomelatonin, was first identified in plants in 1995 and has since emerged as a potent antioxidant and versatile signaling molecule. It plays a critical role in integrating hormonal networks and modulating stress responses in plants, including rice.

Monoprotonated Rose Bengal: A high-efficiency solar disinfectant for rapid Escherichia coli inactivation in drinking water.

Powerful, portable, and affordable point-of-use water disinfection technologies are urgently needed in impoverished rural areas and trips. In this study, we firstly revealed the outstanding inactivation of Escherichia coli (E. coli) by monoprotonated Rose Bengal (RB) and developed a promising new water disinfectant based on this principle.

Nanoplastics-induced hormesis enhances cadmium bioaccumulation in nematodes by stimulating glutathione synthesis.

Nanoplastics (NPs) induce hormesis at environmental concentrations due to their relatively low toxicity; however, this phenomenon can alter the response of biota to coexisting heavy metals, resulting in unknown combined risks. In this study, we investigated the joint effects of cadmium (Cd) and four polystyrene nanoplastics (PS-NPs) with different sizes (100 nm and 500 nm) and surface modifications (-NH and -COOH) on Caenorhabditis elegans, focusing on how NPs-induced bioresponses contribute to Cd accumulation in nematodes. Different from traditional views, the results show that NPs enhance Cd accumulation primarily through hormesis rather than direct adsorption.

Surface Roughness Engineering for High-Salt-Tolerant Solar Evaporator with Enhanced Efficiency in Sustainable Desalination.

The accumulation of dense crystal layers on solar evaporators compromises the performances by reducing light absorption efficiency and obstructing water transport channels, ultimately diminishing evaporation rate. To mitigate this issue, spatially separated crystallization sites can be engineered on the evaporator surface to disrupt salt adhesion and prevent dense layers formation. In this study, a 3D column-shaped wood evaporator (KOH-activated carbon- delignified wood (KAC-DW)) is developed by coating DW with KAC.

pH-gated activation of nematodes-secreted NUC-1 accelerates extracellular antibiotic resistance gene degradation in aquatic environments.

The global dissemination of extracellular antibiotic resistance genes (eARGs) in environmental matrices necessitates urgent development of mitigation approaches. Although nematodes exhibit potential as biological agents for eARG degradation, significant research gaps exist in understanding their performance under diverse environmental conditions and strategies for enhancing degradation efficiency through systematic parameter optimization. Here, we systematically evaluated the degradation of plasmid-borne tetM by Caenorhabditis elegans across eight high nematodes-prevalent habitats, revealing a remarkable 38-fold variation in efficacy.

Comparison of PAH mass emissions and their toxicity-weighted trends in China, 2000-2022.

Polycyclic aromatic hydrocarbons (PAHs) emissions are often used as direct evidence for subsequent environmental monitoring, governance, and policy-making. However, the toxicity among individual PAH varies significantly, causing their toxicity-based risk to be overlooked. The analysis revealed that total PAH emissions (E) has peaked in 2007 (i.

Selective ·OH generation in Fenton-like reaction by dual sulfur coordination of iron organic frameworks.

Traditional Fenton-like reaction simultaneously generates hydroxyl radical (·OH) and superoxide radical (·O) through Fe(Ⅲ)/Fe(Ⅱ) cycle, while ·OH with higher oxidation capacity is commonly consumed by ·O. Therefore, selective generation of ·OH but not ·O in Fenton-like reaction is highly desirable, but still remains challenging since it is hard to bypass Fe cycle process. This work constructed dual S coordination of Fe organic frameworks, i.

Impregnating Lattice Sulfur into Iron Crystal Allows Anaerobic Degradation of Extracellular Antibiotic Resistance Genes.

Lattice sulfur-impregnated nanoscale zerovalent iron (S-nFe) has been recognized as a promising groundwater remediation agent. However, little information is available on its reactivity with ubiquitous extracellular antibiotic resistance genes (eARGs) in anaerobic groundwater, and how S content and speciation affect their interactions. Here, the efficient anaerobic degradation of eARGs by S-nFe (6 log within 5 min), resulting in completely inhibited transformation is showed.

Modulating Iron Crystals with Lattice Chalcophile-Siderophile Elements for Selective Dechlorinations Over Hydrogen Evolution.

Selective dechlorination of organic chlorides over hydrogen evolution reaction (HER) remains a challenge because of their coincidence. Nanoscale zerovalent iron (nFe) draws a promising picture of in situ groundwater dechlorination, but its indiscriminate reactivity limits the application. Here, nFe crystals are designed with electron shuttles and improved hydrophobic nature based on elemental chalcophile-siderophile characteristics, where chalcophile-siderophile S served as a bridge to allow impregnating nFe crystals with weakly siderophile and strongly chalcophile Cu.

Underestimated Cumulative Intake Risk of Veterinary Antibiotics Across Multiple Matrices within a Coupled Breeding-Cropping Model.

The coupled breeding-cropping model has been increasingly applied in organic agriculture due to its high resource efficiency; however, the environmental risks of veterinary antibiotics within the solid-liquid-biological system remain unclear. This study focused on a typical poultry-crop system and investigated the migration patterns of enrofloxacin (ENX), ciprofloxacin (CIP), oxytetracycline (OTC), doxycycline (DOX), and florfenicol (FF) in manure, drain, paddy soil, and agricultural products. A strong source-sink relationship was established, with paddy soil identified as the primary reservoir, retaining over 40.

Controllable Supply-Demand Effect during Superior Fe Single-Atom Catalyst Synthesis for Targeted Guanine Oxidation of Antibiotic Resistance Genes.

Nonradical Fenton-like catalysis offers an opportunity to degrade extracellular antibiotic resistance genes (eARGs). However, high-loading single-atom catalysts (SACs) with controllable configurations are urgently required to selectively generate high-yield nonradicals. Herein, we constructed high-loading Fe SACs (5.

Sulfur Bridge Geometry Boosts Selective Fe═O Generation for Efficient Fenton-Like Reactions.

High-valent iron-oxo species (Fe═O) is a fascinating enzymatic agent with excellent anti-interference abilities in various oxidation processes. However, selective and high-yield production of Fe═O remains challenging. Herein, Fe diatomic pairs are rationally fabricated with an assisted S bridge to tune their neighbor distances and increase their loading to 11.

Plant growth stage and melatonin concentration dependency together drive the metal-nutrient dynamics of rice in paddy soil.

Foliar application of melatonin shows promise in alleviating oxidative stress in rice, though its influence on metal-nutrient dynamics remains unclear. This study investigated the optimal dosage, timing, and concentration of melatonin for regulating elemental uptake, maintaining redox homeostasis, and managing nutrient dynamics in rice cultivated in cadmium (Cd) and selenium (Se)-enriched soils. Melatonin (50, 200 µM) was applied at vegetative stages: jointing (J) and tillering (T).

Metabolomic and gut-microbial responses of earthworms exposed to microcystins and nano zero-valent iron in soil.

The earthworm-based vermiremediation facilitated with benign chemicals such as nano zero-valent iron (nZVI) is a promising approach for the remediation of a variety of soil contaminants including cyanotoxins. As the most toxic cyanotoxin, microcystin-LR (MC-LR) enter soil via runoff, irrigated surface water and sewage, and the application of cyanobacterial biofertilizers as part of the sustainable agricultural practice. Earthworms in such remediation systems must sustain the potential risk from both nZVI and MC-LR.

Desorption hysteresis of antibiotics on biochar produced at high temperature: The role of amine groups and amidation reaction.

Knowledge of antibiotic desorption from high-temperature biochar is essential for assessing their environmental risks, and for the successful application of biochar to remove antibiotics. In previous studies, irreversible pore deformation, formation of charge-assisted hydrogen bonds or amide bonds were individually proposed to explain the desorption hysteresis of antibiotics on biochars, leading to a debate on hysteresis mechanism. In this study, desorption of sulfamethoxazole (SMX), ciprofloxacin (CFX) and tetracycline (TET) on a wood chip biochar produced at 700 °C (WBC700) and its oxidized product (O-WBC700) was investigated to explore the underlying hysteresis mechanism.

Multifunctional biomolecular corona-inspired nanoremediation of antibiotic residues.

Facing complex and variable emerging antibiotic pollutants, the traditional development of functional materials is a "trial-and-error" process based on physicochemical principles, where laborious steps and long timescales make it difficult to accelerate technical breakthroughs. Notably, natural biomolecular coronas derived from highly tolerant organisms under significant contamination scenarios can be used in conjunction with nanotechnology to tackling emerging contaminants of concern. Here, super worms () with high pollutant tolerance were integrated with nano-zero valent iron (nZVI) to effectively reduce the content of 17 antibiotics in wastewater within 7 d.

Green synthesis of a superhydrophobic porous organic polymer for the removal of volatile organic compounds at high humidity.

Superhydrophobic porous organic polymers are potential sorbents for volatile organic compounds (VOCs) pollution control by suppressing the competition of water molecules on their surfaces. However, the synthesis of superhydrophobic reagents usually requires large amounts of organic solvents and a long reaction time (≥ 24 h). Herein, a green mechanochemical method was developed to synthesize a superhydrophobic polymer (MSHMP-1) with the advantages of using a small amount of organic solvents (5 mL/g) and a short reaction time (2 h).

The effects of nanoplastics and microcystin-LR coexposure on Aristichthys nobilis at the early developmental stages.

Nanoplastics (NPs) and microcystin-LR (MC-LR) are two common and harmful pollutants in water environments, especially at aquafarm where are full of plastic products and algae. It is of great significance to study the toxic effects and mechanisms of the NPs and/or MC-LR on fish at the early stage. In this study, the embryo and larvae of a filtering-feeding fish, Aristichthys nobilis, were used as the research objects.

Distribution pattern analysis of multiple antibiotics in the soil-rice system using a QuEChERS extraction method.

Antibiotics are commonly released into paddy fields as mixtures via human activities. However, the simultaneous extraction and detection of these chemicals from multiple media are technically challenging due to their different physicochemical properties, resulting in unclear patterns of their transport in the soil-rice system. In this study, a "quick, easy, cheap, effective, rugged, and safe" (QuEChERS) method was developed for the simultaneous analysis of 4 tetracyclines (TCs) and 4 fluoroquinolones (FQs) in the soil and rice tissues from a local poultry farm, and thereby the distribution patterns of the target antibiotics in the soil-rice system and their risk levels to the soil were analyzed.

Ferric Oxide Nanomaterials and Plant-Rhizobacteria Symbionts Cogenerate Iron Plaque for Removing Highly Chlorinated Contaminants in Dryland Soils.

Rhizosphere iron plaques derived from Fe-based nanomaterials (NMs) are a promising tool for sustainable agriculture. However, the requirement for flooded conditions to generate iron plaque limits the scope of the NM application. In this study, we achieved Fenton oxidation of a highly chlorinated persistent organic pollutant (2,2',4,5,5'-pentachlorobiphenyl, PCB101) through iron plaque mediated by the interaction between α-FeO NMs and plant-rhizobacteria symbionts under dryland conditions.