Static magnetic field enhances biogenic Mn (II) oxidation in magnetite sand filtration to strengthen the removal of emerging contaminants in groundwater.

Oligotrophic groundwater limits biodegradation in sand filtration, illuminating the pathway of the in-situ production of oxidatively active Mn oxide (MnOx) to remove emerging contaminants (ECs). Based on the Mn(II) removal filter, increased production of chemical MnOx (CheMnOx) for EC removal could be realized by increasing biogenic MnOx (BioMnOx) as the Mn active film to stimulate autocatalytic Mn(II) oxidation. However, progress in exogenously enhancing biogenic Mn(II) oxidation is limited.

[Distribution, Accumulation, and Amplification of Per- and Polyfluoroalkyl Substances in Organisms in Coastal Waters of Bohai Sea].

Per- and polyfluoroalkyl substances （PFAS）, as a class of emerging environmental contaminants, have garnered significant attention because of their widespread presence. With some legacy PFAS phased out, novel PFAS are increasingly produced and utilized. However, research on the pollution characteristics, bioaccumulation, and biomagnification of these emerging ones remains limited.

Marine microplastics fuel long-range transport of radioactive nuclides: A review.

Growing concerns over microplastics in marine environments have intensified research into their interactions with radioactive nuclides, given microplastics' chemical stability and extensive specific surface area, which render them highly effective carriers for radionuclide adsorption. This review adopts a systematic methodology, incorporating a comprehensive literature survey of peer-reviewed articles published in the past decade, and critically analyzes experimental data from both field and laboratory studies. This article first synthesizes current knowledge on the origins, distribution patterns, and physicochemical properties of both microplastics (e.

Cationic conjugated microporous polymers for efficient quinolone antibiotics extraction: Experimental and DFT study.

The development of exquisitely sensitive analytical methods for the surveillance of quinolone antibiotics (QAs) holds pivotal significance in safeguarding both ecosystems and human well-being. In this work, a cationic conjugated microporous polymer (iCMP) was constructed through a facile post-synthetic approach. Capitalizing on its unique dual-porosity architecture, cationic framework, and π-conjugated backbone, iCMP exhibited exceptional adsorption capabilities and remarkable repeatability.

Unveiling gut microbiota and metabolic functions contributed to polyvinyl chloride degradation in Spodoptera frugiperda larvae.

The accumulation of synthetic plastic waste, particularly polyvinyl chloride (PVC), threatens ecosystems globally. While microbial biodegradation represents a sustainable solution, limited effective PVC-degrading microbial bioresources have been identified. Here, we investigated the gut microbiota of Spodoptera frugiperda larvae, revealing a consistent microbial profile dominated by Enterococcus in both gut contents and tissues.

Multi-objective decision-making considering future demands helps to delineate key areas for ecological restoration in Changsha-Zhuzhou-Xiangtan urban agglomeration, China.

ecological restoration is an effective method to address land degradation and ecosystem deterioration of urban agglomeration with rapid development. However, previous efforts neglect socio-economic goals for ecological restoration and the land use demand in the future, leading to a disconnect between ecological restoration and the support for social and economic development. Here we explore the identification of key areas for ecological restoration (KAsER) according to a multi-objective view of the urban agglomeration, as well as future demand.

Rapid Evolution in Action: Environmental Filtering Supports Coral Adaptation to a Hot, Acidic, and Deoxygenated Extreme Habitat.

The semienclosed Bouraké lagoon in New Caledonia is a natural system that enables observation of evolution in action with respect to stress tolerance in marine organisms, a topic directly relevant to understanding the consequences of global climate change. Corals inhabiting the Bouraké lagoon endure extreme conditions of elevated temperature (> 33°C), acidification (7.2 pH units), and deoxygenation (2.

Lithium Levels in Umbilical Cord Blood from Two Cities in China: Indicating Unidentified Sources of Human Exposure.

As lithium demand continues to grow, increasing environmental lithium concentrations pose potential health risks to sensitive populations, particularly pregnant women and fetuses. However, data on fetal lithium exposure and umbilical cord blood lithium concentrations in nonpolluted regions remain scarce. To address this gap, we monitored lithium concentrations in maternal and umbilical cord blood in Beijing and Changsha, and analyzed exposure sources using a one-compartment model.

Phenylmethylsiloxanes in the typically human-impacted Xiaoqing River of China: Their distribution and degradation in both waterbodies and mussels.

Based on sampling from Xiaoqing River of China and elimination experiments, this study first investigated spatial/seasonal profiles and fates of phenylmethylsiloxanes (PMSs), as modified products of dimethylsiloxanes (DMSs), in natural waterbody. Overall, the average water (6.7 ng/L) and sediment (28.

Non-target analysis of organic pollutants in oil-production wastewater treatment stations and surrounding soils: Their profiles, electro-transformation, and environmental risks.

Although pollution during crude oil production has been paid attention, there is lack of studies on organic pollutants generated/emitted from oil-production wastewater (OPW) treatment processes, especially advanced oxidation process. Based on GC-Q-Orbitrap-HRMS, the present study performed non-target analysis of volatile/semi-volatile organic compounds in physical and electro-oxidation units of OPW treatment stations located in Shengli Oilfield of China. Overall, 64-227 organic compounds were respectively identified in different units, and electro-oxidation was found elevating (by 2.

Effects of dissolved organic matter from different sources on ritonavir photolysis.

With the misuse of antiviral drugs, the residual levels of ritonavir (RTV) in aquatic environments continue to increase, potentially posing threats to ecosystems and human health. However, the current understanding of the photochemical behavior of RTV in water, especially the mechanism by which dissolved organic matter (DOM) from different sources affects the indirect photolysis of RTV, remains limited. This study systematically investigated the effects of DOM from different sources (including sludge, algae, dustfall, and soil, namely SL-DOM, AL-DOM, DF-DOM, and SO-DOM, respectively) on the photodegradation of RTV for the first time.

Peroxymonosulfate-assisted photocatalysis system enhanced magnetic FeO@P-CN treatment of tetracycline wastewater: Multi-pathways mediated electrons migration to generate reactive species.

Photocatalytic wastewater purification is essential for environmental remediation, but rapid carrier recombination and limited oxidative capacity hinder progress. This study proposes an innovative strategy by integrating homogeneous and heterogeneous electron acceptors into a g-CN-based photocatalytic system, significantly enhancing the multipath utilization of photogenerated electrons. A novel FeO@P-CN was developed to activate an advanced peroxymonosulfate-assisted photocatalysis (PAP) system, achieving complete degradation and significant mineralization of tetracycline (TC) in real water environments, outperforming others reported in the last five years.

The new region demarcation framework for implementing the joint prevention and control of groundwater pollution: A case study in western of Bohai Bay, China.

The joint groundwater pollution prevention and control (GPPC) strategy has been extensively implemented to address the coastal region groundwater pollution challenges in China. However, regional groundwater pollution control and treatment efficiency cannot achieve the expected results due to the lack of regional priority control orders and accurate restoration levels. Thus, this study developed a new region demarcation framework method for delineating GPPC zones, in tandem with a comprehensive pollution index method, the DRASTIC model, source apportionment.

[Radial growth response of to climate change in the Cele desert oasis ecotone, China].

is an important tree species in the arid regions of Northwest China, which is sensitive to climate changes. Climate of the Northwest China is changing to be "warm and humid", but how it would affect the regional forest growth is not clear. In this study, the radial growth response of to major climatic factors and their temporal changes during 1984-2021 were analyzed by using dendrochronology method in the desert oasis ecotone of Cele in the southern Tarim basin.

Using Machine Learning to Construct the Blood-Follicle Distribution Models of Various Trace Elements and Explore the Transport-Related Pathways with Multiomics Data.

Permeabilities of various trace elements (TEs) through the blood-follicle barrier (BFB) play an important role in oocyte development. However, it has not been comprehensively described as well as its involved biological pathways. Our study aimed to construct a blood-follicle distribution model of the concerned TEs and explore their related biological pathways.

Suitability of inorganic coagulants for algae-laden water treatment: Trade-off between algae removal and cell viability, aggregate properties and coagulant residue.

Inorganic coagulants could effectively precipitate algae cells but might increase the potential risks of cell damage and coagulant residue. This study was conducted to critically investigate the suitability of polyaluminum (PAC), FeCl and TiCl for algae-laden water treatment in terms of the trade-off between algal substance removal, cell viability, and coagulant residue. The results showed that an appropriate increase in coagulant dosage contributed to better coagulation performance but severe cell damage and a higher risk of intracellular organic matter (IOM) release.

Gestational diabetes mellitus enhances cobalt placental transfer efficiency between mother and infant.

The fetal stage is pivotal for growth and development, making it susceptible to the adverse effects of prenatal metal(loid)s exposure. This study evaluated the influence of gestational diabetes mellitus (GDM) on the placental transfer efficiency (PTE) of metal(loid)s and thus assessed the associated risks of prenatal metal(loid)s exposure. Designed as a case-control study, it incorporated 114 pregnant participants: 65 without complications and 49 diagnosed with GDM.

Evaluation of the DGT passive samplers for integrating fluctuating concentrations of pharmaceuticals in surface water.

Diffusive gradients in thin films (DGTs) have been well-documented for the measurement of a broad range of organic pollutants in surface water. However, the performance has been challenged by the inherent periodic concentration fluctuations for most organic pollutants. Therefore, there is an urgent need to assess the true time-weighted average (TWA) concentration based on fluctuating concentration profiles.

Study on mechanism of removal of sudden Tetracycline by compound modified biological sand filtration process.

The removal of tetracycline from the sewage plant effluents through advanced treatment methods is key to controlling tetracycline levels in the water environment. In this study, modified quartz sands (QS) were used in a biological sand filter to remove tetracycline. The modified QS, with different surface characteristics, were prepared using glass etching technology combined with subsequent chemical modification methods, including hydroxylation treatment, metal ion modification, and amino modification.

Occurrence, Source Apportionment, and Ecological Risk of Typical Pharmaceuticals in Surface Waters of Beijing, China.

Various studies have shown that the heavy use of pharmaceuticals poses serious ecological risks, especially in metropolitan areas with intensive human activities. In this study, the spatial distribution, sources, and ecological risks of 29 pharmaceuticals in 82 surface waters collected from the North Canal Basin in Beijing were studied. The results showed that the pharmaceutical concentrations ranged from not detected to 193 ng/L, with ampicillin being undetected while ofloxacin had a 100% detection frequency, which indicates the widespread occurrence of pharmaceutical pollution in the North Canal Basin.

Phenylmethylsiloxanes in indoor dust from residential area of China: Source, occurrence, bioavailability and exposure assessment.

Phenylmethylsiloxanes, as modified products of dimethylsiloxanes, have been used in personal care products (PCPs) and household appliances, with indoor dust serving as one potential reservoir due to their particle-binding properties. This study measured six isomers of two phenylmethylsiloxanes (P3 and P4) in PCPs ( View Article and Find Full Text PDF

Upcycling harmful algal blooms into short-chain organic matters assisted with cellulose-based flocculant.

Upcycling harmful algal blooms (HABs) into short-chain organic matters (SCOMs) presents a significantly underexplored opportunity for addressing environmental concerns and achieving circular economy. But there are challenges of low HABs harvesting and SCOMs conversion efficiencies. To address these issues, a novel cellulose-based flocculant derived from abundant agricultural waste (wheat straw) was developed.

Depth-dependent variations of physicochemical properties of sedimentary dissolved organic matter and the influence on the elimination of typical pharmaceuticals.

Sedimentary dissolved organic matter (DOM) could exert a significant influence on the transformation of trace organic contaminants. However, the variations of sedimentary DOM properties with depth and their impact on trace organic contaminants biodegradation remain unclear. In this study, the qualitative changes in DOM properties with depth were assessed using spectral techniques.

Characteristics of dissolved organic matter (DOM) in Chinese farmland soils under different climate zone types: A molecular perspective.

Interactions between dissolved organic matter (DOM) and surrounding environments are highly complex. Understanding DOM at the molecular level can contribute to the management of soil pollution and safeguarding agricultural fields. Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) has enabled a molecular-level understanding of DOM.