Constrained Heterogeneous CoFeO/ZnO/PMS Fenton-Like System for Industrial Wastewater Remediation with Recyclability and Zero Metal Loss.

Although heterogeneous Fenton-like processes have attracted widespread attention in wastewater treatment, the mass leached active ions lead to secondary pollution and confuse the demarcation of reaction region. By constructing a constrained completely heterogeneous system and highlighting its reaction region concentrated within the slipping plane of particles, this work achieves efficient organic pollutants degradation without leaching of any free active metal components. Based on the Poisson-Boltzmann equation and electric double layer model, the specific existing of the constrained region is confirmed, and this neglected reaction region between solid interface and slipping plane in traditional heterogeneous Fenton-like reaction is clarified firstly.

Molecular disruptions in microalgae caused by Acidithiobacillus ferrooxidans: Photosynthesis, oxidative stress, and energy metabolism in acid mine drainage.

Microalgae are recognized for their potential in the bioremediation of acid mine drainage (AMD), despite the challenges posed by AMD's low pH, high heavy metal content, and oligotrophic conditions. However, the impact of AMD chemoautotrophic microorganisms on microalgal growth and remediation efforts within AMD has been largely overlooked. This study aims to elucidate the effects the chemoautotrophic microorganism, Acidithiobacillus ferrooxidans, on the growth activity and metabolism of acid-tolerant microalgae, and to explore the molecular mechanisms of microalgal response.

Comprehensive understanding of microplastics in compost: Ecological risks and degradation mechanisms.

The introduction of microplastics (MPs) into soil ecosystems via compost application has emerged as a critical environmental concern. However, the ecological risks and degradation behavior of MPs in compost remain insufficiently understood. This review addresses these gaps by synthesizing recent findings on MPs in composting systems, focusing on their sources, impacts on compost quality, ecological risks, and degradation mechanisms.

Degradation of polyamide nanofiltration membranes by free chlorine and halide ions: Kinetics, mechanisms, and implications.

The kinetics of polyamide membrane degradation by free chlorine and halide ions (Br and Cl) were innovatively evaluated based on physicochemical properties and filtration performance, using water/solute permeability coefficient in addition to bromide incorporation as important indicators. The reaction rate constants for the reduced water and HBO permeability coefficient were 1-2 orders of magnitude higher at 0-1 h than 1-10 h. N-bromination and bromination-promoted hydrolysis are dominant degradation mechanisms at 0-1 h (reflected by the breakage of hydrogen bond, the increased Ca binding content, and the increased charge density), and ring-bromination further occurs at 1-10 h (reflected by the disappearance or weakening of aromatic amide band and the nearly constant hydrogen bond).

Research Progress of Application and Interaction Mechanism of Polymers in Mineral Flotation: A Review.

Polymers are composed of many smaller units connected by covalent bonds, with higher molecular weight and larger molecular structure. Due to their economical efficiency and easy modification, researchers have discovered the potential of polymers as the flotation reagent in mineral processing, including the roles of depressant, flocculant, and frother. This paper provides a comprehensive review of the utilization of polymers in mineral flotation, emphasizing their current applications and mechanistic investigations.

Exploration of forestry carbon sequestration practice path in Guizhou province-based on evolutionary game model.

Guizhou Province has abundant forest resources, and it has great economic value and social benefits to explore the practical path of forestry carbon sequestration. Based on the current situation of forestry carbon sequestration development in Guizhou Province, this paper innovatively integrates forestry carbon sequestration indicators into the existing Environmental, Social and Governance(ESG) evaluation system using an evolutionary game model. It analyzes the factors restricting forestry carbon sequestration and explores the influencing factors of forestry carbon sequestration benefit sharing bodies in Guizhou.

Synergistic effect of W(VI) and Ni(II) uptakes on an MgAl-layered double hydroxide.

The coadsorption of anionic and cationic pollutants on adsorbents holds considerable importance in the development of relevant removal technologies and the understanding of pollutant transport in complex environmental media. Herein, tungsten (W), an emerging contaminant, and nickel (Ni) were chosen as two differently charged inorganic pollutants to investigate their removal characteristics on a magnesium-aluminum layered double hydroxide (LDH) prepared via microwave radiation. In the single systems, the amount of adsorbed W on LDH was initially increased and then decreased with increasing initial W concentration.

Occurrence and risk of microplastics and hexabromocyclododecane in urban drinking water systems: From source water to tap water.

The widespread presence of microplastics (MPs) in drinking water systems and their risk of releasing additives have caused widespread concern. However, current research on the migration and risks of MPs and additives in the complete drinking water supply chain remains inadequate. In this study, micro-Raman spectrometer was used to track the entire transport process of MPs from the water source to the tap water, with concentrations ranging from 805 to 4960 items/L, and polyethylene and Polyethylene terephthalate were dominant.

Perceived social support and deviant behavior of new street corner youth on campus: a moderated mediation model.

Introduction: The current study aimed to examine the moderated mediation between perceived social support, the deviant behavior of new street corner youth on campus (NSCYC), interpersonal needs (as a mediator), and meaning in life (as a moderator).

Methods: A total of 596 new street corner youth on campus were investigated using the Deviant Behavior Questionnaire, Perceived Social Support Scale, Interpersonal Needs Questionnaire, and Meaning in Life Questionnaire.

Results: The findings showed that: (1) perceived social support significantly and negatively predicted deviant behavior; (2) interpersonal needs mediated the association between perceived social support and deviant behavior; and (3) a moderated mediating role of perceived social support influencing deviant behavior was established, with meaning in life regulating both the direct and the first half paths of the model.

Pollutant emissions and environmental advantages of heating peanut oil by using commercial induction cooktop: A comparative analysis with traditional natural gas stoves.

Commercial induction cooktops are increasingly gaining popularity in residential households and business restaurants. However, little is known about the specific environmental benefits of induction cooking compared to conventional gas cooking. This study used two heating methods to heat peanut oil to achieve the same heating effect, and compared particulate matter, volatile organic compounds (VOCs), ozone precursors, and total carbon emissions generated during the heating process using various detection devices.

Fe(III)-Aided sp. ES2-1 Regulates Molecular Mechanisms of 17β-Estradiol Biodegradation.

17β-estradiol (E2) is one of the strongest environmental estrogens threatening wildlife and human health globally. Microbial degradation is an alternative strategy to remediate E2-contaminated sites and may be regulated by ubiquitous Fe(III) in eco-environments. We have previously obtained a high-efficiency E2 degrader, sp.

Longitudinal splitting and grouting in deep buried rock layers based on the coupling effect between slurry and rock.

The coupling effect between slurry and a fractured rock layer controls the width of the fracturing channel and the grouting pressure. This effect is attenuated as the slurry diffusion front spreads from the grouting hole. This study examined the motion of slurry and the fracture expansion process, thereby establishing a longitudinal grout-splitting model of slurry-rock coupling by deriving a slurry-splitting diffusion motion equation that considers the time-varying viscosity of the slurry and attenuation of the fracture width.

Selective leaching mechanisms of zinc from industrial waste using hybrid acids: Sustainable synthesis of Nano-ZnO.

Zinc-containing dust (ZCD) has received extensive attention because it is a hazardous waste rich in various metals. This study innovatively proposed a hybrid acid leaching agent based on malic acid (MA) and sulfuric acid to selectively extract Zn from ZCD and successfully prepare nano-ZnO materials. The leaching experiments show that among the combinations of various organic acids and sulfuric acid, MA and sulfuric acid are superior in the selective leaching of Zn.

Mechanistic insights into activation of peracetic acid by sludge biogas residue biochar for efficient sulfamethoxazole degradation in aqueous solution.

The application of peracetic acid (PAA) in the advanced oxidation process has been demonstrated to be an effective approach for treating aqueous organic pollutants. In this study, it is the first time that biogas residue biochar (BRBC) derived from sludge anaerobic digestion plants was prepared and used as a PAA activator for sulfamethoxazole (SMX) degradation. The optimal SMX removal could achieve 92 % within 120 min under acidic conditions.

Mechanical Motion and Color Change of Humidity-Responsive Cellulose Nanocrystal Films from Sunflower Pith.

Nanocellulose has prompted extensive exploration of its applications in advanced functional materials, especially humidity-responsive materials. However, the sunflower pith (SP), a unique agricultural by-product with high cellulose and pectin content, is always ignored and wasted. This work applied sulfuric acid hydrolysis and sonication to sunflower pith to obtain nanocellulose and construct film materials with humidity-responsive properties.

Diversity of nitrogen-fixing bacteria in rhizosphere during reproduction in the Yellow River delta.

Salinization in the Yellow River delta poses a challenge for agriculture, but nitrogen-fixing bacteria can improve soil nitrogen content and enhance plant growth under salt stress. This study focuses on the salt-tolerant plant , analyzing its plant traits and the diversity of nitrogen-fixing bacteria in its rhizosphere using the gene. Results show a gradual decline in plant height, fresh weight, and microbial diversity from inland to coastal areas.

Molecular Basis of Thioredoxin-Dependent Arsenic Transformation in Methanogenic Archaea.

Methanogenic archaea are known to play a crucial role in the biogeochemical cycling of arsenic (As); however, the molecular basis of As transformation mediated by methanogenic archaea remains poorly understood. Herein, the characterization of the redox transformation and methylation of As by , a model methanogenic archaeon, is reported. was demonstrated to mediate As(V) reduction via a cytoplasmic As reductase (ArsC) in the exponential phase of methanogenic growth and to methylate As(III) via a cytoplasmic As(III) methyltransferase (ArsM) in the stationary phase.

Comprehensive assessment of fish diversity and water health in river Indus, Khyber Pakhtunkhwa, Pakistan.

Fish diversity and water quality are vital indicators of the health of freshwater ecosystems, however these systems are increasingly threatened by environmental changes and anthropogenic activities. This investigation aimed to assess the fish diversity and evaluate the physicochemical parameters of water at Ghazi Swabi near Tarbela Dam, River Indus, Khyber Pakhtunkhwa, Pakistan, between March and June 2020. Monthly water samples were collected and analyzed for various physicochemical parameters such as temperature, dissolved oxygen (DO), total dissolved solids (TDS), pH, turbidity, salinity, and concentrations of heavy metals including lead (Pb), copper (Cu), cadmium (Cd), and mercury (Hg).

Two types of microorganisms isolated from petroleum hydrocarbon pollutants: Degradation characteristics and metabolic pathways analysis of petroleum hydrocarbons.

The petroleum hydrocarbons in seawater have been worldwide concern contaminants. Biological method, with the advantages of low cost, minimal environmental impact, and no secondary pollution, is a promising method for petroleum hydrocarbon treatment. In this study, two strains, identified as Stenotrophomonas acidaminiphila and Ochrobactrum, were demonstrated to possess the ability to degrade petroleum hydrocarbons.

A comprehensive review on human enteric viruses in water: Detection methods, occurrence, and microbial risk assessment.

Human enteric viruses, such as norovirus, adenovirus, rotavirus, and enterovirus, are crucial targets in controlling biological contamination in water systems worldwide. Due to their small size and low concentrations in water, effective virus concentration and detection methods are essential for ensuring microbial safety. This paper reviews the typical and innovative methods for concentrating and detecting human enteric viruses, highlights viral contamination levels across different water bodies, and discusses the removal efficiencies of virus through various treatment technologies.