Cultivation of high-protein Euglena gracilis for enhanced protein production under inorganic nitrogen sources: mechanisms revealed by proteomics.

Amid global food shortage, alternative cost-effective protein sources are urgently needed for aquaculture and animal feed. Without a rigid cell wall, Euglena gracilis provides extractable, digestible proteins, and its high productivity makes it an ideal feed source. This study investigates the effects of different inorganic nitrogen sources on the biomass and biochemical composition of E.

Downward migration of per- and polyfluoroalkyl substances (PFAS) in lake sediments: Reconsideration of temporal trend analysis.

Using sediment cores to reconstruct the contamination history of per- and polyfluoroalkyl substances (PFAS) is essential for chemical management but poses challenge. Herein, sediment cores, as well as surface water and sediments were taken from two Chinese lakes to investigate the vertical distribution and migration of PFAS. Wind wave, properties of sediment and water, and chemical characters of PFAS were examined to clarify the main factors influencing PFAS migration.

A molecular transformation study on the humus soil biomaterial promoting effects on the humification process in an anaerobic digestate composting system.

Biopolymers with different biodegradability result in the asynchronous production of humus precursors during anaerobic digestate composting, which hinders humus formation. This study aimed to improve the humification process of digestate composting with Humus Soil Biomaterial (HSB) as ameliorant, and unveiled corresponding humification mechanisms. Results indicated that HSB containing pumice stone, phenolics, and native microbes promoted the humification process of digestate composting and contributed to higher aromaticity and humification degree.

Exploring the chemical behaviors of dissolved organic matter to thermal hydrolysis temperature at the molecular level and its fate in anaerobic membrane bioreactor.

Thermal hydrolysis pretreatment (THP) coupled with anaerobic membrane bioreactor (AnMBR) to enhance biomass bioconversion and methane production is a promising biotechnology. Herein, we shed light on the effects of THP temperature on molecular structure changes of dissolved organic matter of sewage sludge and food waste and its underlying mechanisms on hydrolysis, and methane bioconversion. The optimal THP condition was 160 °C, with a 1.

Unseen streams tracing emerging contaminants from stormwater to surface water: A brief review.

Emerging contaminants (ECs) have raised global concern due to their adverse effect on ecosystems and human health. However, the occurrence and transport of ECs in stormwater remain unclear. The impact of ECs from stormwater on surface water quality and ecosystem health is also poorly documented.

Roles of naturally occurring biogenic iron-manganese oxides (BFMO) in PMS-based environmental remediation: A complete electron transfer pathway.

Bisphenol A (BPA) is a pervasive endocrine disruptor that enters the environment through anthropogenic activities, posing significant risks to ecosystems and human health. Advanced oxidation processes (AOPs) are promising methods for the removal of organic microcontaminants in the environment. Biogenic manganese oxides (BMO) are reported as catalysts due to their transition metal nature, and are also readily generated by manganese-oxidizing microorganisms in the natural environment, and therefore their roles and effects in AOPs-based environmental remediation should be investigated.

Band gap regulation of MIL-101(Fe) via pyrazine-based ligands substitution for enhanced visible-light adsorption and its photo-Fenton-like application.

Regulating the photo-response region of iron metal-organic frameworks (Fe-MOFs) is a viable strategy for enhancing their practical application in the visible-light driven photo-Fenton-like process. This study developed a novel pyrazine-based Fe-MOFs (MIL-101(Fe)-Pz) by substituting the 1,4-dicarboxybenzene acid ligands in typical MIL-101(Fe) with 2,5-pyrazinedicarboxylic acid (PzDC), in which sodium acetate was used as coordinative modulator to control the crystal size (2-3 µm). The incorporation of Fe-pyridine N coordination structures originated from PzDC ligands gave MIL-101(Fe)-Pz narrowed band gap (1.

Release and Redistribution of Arsenic Associated with Ferrihydrite Driven by Aerobic Humification of Exogenous Soil Organic Matter.

Humification of exogenous soil organic matter (ESOM) remodels the organic compositions and microbial communities of soil, thus exerting potential impacts on the biogeochemical transformation of iron (hydr)oxides and associated trace metals. Here, we conducted a 70-day incubation experiment to investigate how aerobic straw humification influenced the repartitioning of arsenic (As) associated with ferrihydrite in paddy soil. Results showed that the humification was characterized by rapid OM degradation (1-14 days) and subsequent slow maturation (14-70 days).

Study on adsorption and desorption characteristics of lead pollution by biofilm in drinking water pipeline from multi-factor perspective.

This study investigates lead adsorption and desorption behaviors in biofilms on drinking water pipeline materials (PVC, 304 stainless steel, copper) under varying flow rate, pH, and residual chlorine. Biofilms on stainless steel exhibited the highest adsorption capacity (450.81 μmol/m), whereas PVC biofilms had the greatest desorption potential (25.

Emission Dynamics and Public Health Implications of Airborne Pathogens and Antimicrobial Resistance from Urban Waste Collection Facilities.

Airborne pathogens and antimicrobial resistance (AMR) present significant global health threats. Household waste collection facilities (WCFs), crucial initial nodes in urban waste management systems, have been understudied in regards to their role in emitting these hazards. This study investigated the abundance, composition, sources, driving mechanisms, and health risks associated with pathogens and AMR originating from WCFs in a major city, using culture-based analysis, high-throughput sequencing, and health risk modeling, respectively.

Decoding the Plastic Patch: Exploring the Global Microplastic Distribution in the Surface Layers of Marine Regions with Interpretable Machine Learning.

The marine environment is grappling with microplastic (MP) pollution, necessitating an understanding of its distribution patterns, influencing factors, and potential ecological risks. However, the vast area of the ocean and budgetary constraints make conducting comprehensive surveys to assess MP pollution impractical. Interpretable machine learning (ML) offers an effective solution.

Facilitating anaerobic digestion of kitchen waste through diatomite-mediated spatial ecological niches construction.

Anaerobic digestion (AD) presents an effective strategy for sustainable management of kitchen waste (KW), yet its widespread application remains constrained by suboptimal organic conversion efficiency and process instability. This study elucidates the critical role of diatomite (DE)-mediated spatial ecological niches construction in enhancing AD performance through microbial community regulation. Experimental results revealed that DE supplementation with optimal dosage of 10 g/L significantly improved methane production by 11.

Highly sensitive detection of the tetracycline resistance gene tetA in water supply systems with an autocatalytic deoxyribonucleic acid-based cascade circuit.

Antibiotic resistance genes (ARGs)-contamination in water systems is a global concern, accelerating antimicrobial resistance and threatening public health, which demands an effective, low-cost and stable method for their on-site detection. Herein, we developed an innovative approach by combining the hybridization chain reaction (HCR) with deoxyribozymes to design an isothermal enzyme-free cascade initiator regenerating (IR) HCR-based amplification system. Minute quantities of targets can trigger exponentially amplified fluorescence signals through the self-catalytic feedback loop of the HCR mechanism.

The collaborative removal of copper/nitrate via catalytic hydrogenation processes over Pd/TiO catalyst.

Nitrate (NO) and Cu are common water pollutants that were frequently detected in varied waters such as metallurgical wastewater, electronic wastewater, etc. It is challenging to achieve simultaneous removal of NO and Cu. Herein, we prepared varied Pd/TiO catalysts for the catalytic hydrogenation reduction of Cu and NO, and found that single Cu could be effectively reduced (100 %) within 15 min, while the removal of NO was ignorant.

New evidence of unequal contribution to health burden reshaping air pollution control in waste-to-energy plants.

Waste-to-energy (WTE) incineration has been long argued for the emission of hazardous flue gas pollutants (FGPs), while the contribution to health burden of individual components is ambiguous, resulting empirical control measures. We constructed a comprehensive framework to assess the health burden by monetizing premature mortalities, combining nine kinds of regulated FGPs from WTE plants. NO and SO were identified as the main contributors to health risk, accounting for around 88.

Phase Transformation Induced Basal Plane Capacitance Enhancement in Two-Dimensional Materials for Electro-Driven Ion Capture.

The capacitive deionization (CDI) technique using two-dimensional (2D) layered Faradaic electrodes offers a promising approach to desalination, but the desalination efficiency of currently engineered electrodes remains insufficient due to unclear charge storage mechanisms. Herein, based on typical 2H and 1T phases of MoS, we systematically investigated the underlying structure-capacitance relationship of 2D materials at the atomic level by revealing differences in interlayer ion storage confined by molecular layers. Our study reveals that octahedrally coordinated 1T phase with a high spin state of unpaired electrons exhibits a higher pseudocapacitive ratio compared to the 2H phase because of the enhanced interfacial charge transfer polarization, reduced surface ion migration barriers, and increased interlayer ion enrichment.

Self-Regulating pH Pyrite-Construction waste Biofilter: Denitrification Performance, Metabolic Pathways, and Clogging Alleviation.

Waste-based denitrification filters face challenges like alkalinity accumulation, low efficiency, and clogging. This study proposes a novel denitrification filter using construction waste and pyrite (WPDF) to address these issues. WPDF's performance, safety, and mechanisms were evaluated by measuring effluent, filler characteristics and metagenomics.

Enhanced anaerobic phenol degradation: Critical roles of glucose and hydrochar on microbial traits.

Phenolic wastewater poses a significant environmental threat due to its toxicity and persistence. This study examined the effects of hydrochar and easily degradable organic wastewater (using glucose as a model compound) on enhancing anaerobic digestion. Their combined application reduced degradation time from 90 days (control) to 30-78 days.

Occurrence, sources, and ecological risk of microplastics in groundwater: Impacts by agricultural activities and atmospheric deposition.

Although microplastic (MP) pollution in groundwater is a serious issue, its potential sources and environmental risks are poorly understood. This study identified the sources of MPs in groundwater from a megacity in China. It estimated the environmental risks of MPs using a combination of the pollution load index (PLI), the polymer hazard index (PHI), and the potential ecological risk index (PERI).

Enhancing manganese redox-driven nitrogen removal by integrating manganese ore with microelectrolysis into constructed wetlands.

Microelectrolysis-integrated constructed wetlands (e-CWs) typically exhibit limited total phosphorus (TP) removal performance, while manganese ore-amended CWs (MOCWs) encounter challenges associated with the interplay between Mn redox cycling and nitrogen transformation. To overcome these limitations, this study introduced MO around the cathode or anode regions in e-CWs, designated as e-CMOCW and e-AMOCW, respectively. Results demonstrated that manganese oxides accelerated NH-N removal.

Floating-leaved and submerged macrophytes suppress filamentous cyanobacteria blooms and 2-MIB episodes in eutrophic shallow lakes.

Although macrophytes can control filamentous cyanobacteria that produce 2-methylisoborneol (2-MIB) in lakes, there is a lack of evidence regarding the inhibitory effects of different macrophyte growth forms on 2-MIB producers, as well as the underlying mechanisms. To address this knowledge gap, this study compared the impact of floating-leaved and submerged macrophytes on Pseudanabaena growth and 2-MIB release, combing a field investigation and culture experiments. The field survey showed that both the Pseudanabaena cell density and 2-MIB concentrations were significantly lower in areas dominated by floating-leaved or submerged macrophytes than in phytoplankton-dominated areas.

Environmental-level antibiotics disrupt Microcystis stoichiometry: An overlooked risk in the context of cyanobacterial harmful algal blooms.

At trace levels (nanograms to micrograms per liter, ng L - μg L), antibiotics exert stimulatory effects on cyanobacteria, potentially posing a threat to aquatic ecosystems. Here, environmentally relevant concentrations of antibiotics were firstly observed to disrupt the stoichiometry of cyanobacterium Microcystis (i.e.

Key toxicity enhancement effect of aqueous-phase secondary formation: Insights from hourly measurements during haze events.

Haze events pose substantial health risks, yet the link between the chemical composition of particulate matter (PM) and the exacerbated health impacts during such episodes remains unclear. This study conducted hourly off-line measurements of the chemical composition and oxidative potential (OP) of water-soluble fractions (WSF) of PM during three haze episodes in the North China Plain (NCP). Results revealed that water-soluble inorganic ions were the primary contributors to the increase in WSF mass (60.

Cu-O-Fe boosts electronic transport for efficient peroxymonosulfate activation over a wide range of pH.

The transition metal-oxygen-transition metal (TM1-O-TM2) structural bonds served as electron transport bridges facilitates the charge flow, which guided developing bimetallic activators for peroxymonosulfate (PMS). In this work, a bimetallic CuO/FeO heterojunction with Cu-O-Fe bond in a core-shell structure was designed. The configuration enhanced PMS activation over a wide range of pH, as demonstrated by the degradation of the model contaminant sulfamethoxazole (SMX), particularly under acid and alkaline condition (>95 % within 30 min).

Efficient disinfection of real toilet blackwater by ultraviolet/peracetic acid process: Selective intracellular biomolecular oxidation.

Toilet blackwater (BW) disinfection is crucial for preventing microbial contamination but is hindered by its complex composition. This study explored the combined ultraviolet and peracetic acid (UV/PAA) process as a novel strategy for BW disinfection. The UV/PAA process effectively inactivated Fecal coliform (1.