Threat Of Pollution Research Articles

An Anthracene-Based Hg2+ Fluorescent Probe with Dithioacetal: Simple Synthesis, High Selectivity and Sensitivity, and Dual-Mode Detection Capability

With the development of the chemical industry, the threat of mercury pollution to human health is increasing. Therefore, it is necessary to develop a low-cost, convenient and efficient Hg2+ detection method. In this study, anthracene-based Hg2+ fluorescent probes AN-2S and AN-4S were synthesized by a dithioacetal reaction for the rapid and efficient detection of the Hg2+ concentration in water. Through molecular structure design and synthesis route optimization, the complexity and cost of the probe synthesis were greatly reduced. AN-2S and AN-4S had good water solubility, rapid response abilities and anti-interference abilities, and could specifically detect Hg2+ using “turn-off” or “turn-on” detection modes within 1 min. The AN-4S probe showed a wide linear response range (0~40 μmol/L) and high sensitivity (4.93 × 10−8 mol/L) to Hg2+ in 99% aqueous solutions, over a pH range of 5~13. The reaction mechanism between the probe and Hg2+ was determined using 1H NMR and FT-IR spectra and Job’s curves. It was proven that the AN-2S and AN-4S probes react with Hg2+ in a molar ratio of 1:1 or 1:2. The dual-detection mode enabled the probes to be used not only for the accurate quantitative detection of Hg2+ under a fluorescence spectrometer, but also for rapid qualitative analysis using a UV flashlight as a test strip, showing a broad practical application potential.

Bacterial accumulation in edible bivalve, Villorita cyprinoides of Ashtamudi estuarine wetland, a Ramsar site in Kerala State, India

The Ashtamudi Lake in Kerala, recognized under the Ramsar Convention, showcases rich biodiversity but faces pollution threats from human activities. Of particular concern is the potential bacterial contamination of inland fishery resources due to these anthropogenic influences. The present study, seasonally analysed the total heterotrophic bacteria (THB) and E. coli in water, sediment and Villorita cyprinoides respectively using pour plate and MPN methods. Water temperature, pH, salinity, DO and BOD of water samples were also estimated. The results showed the presence of THB in water was more in monsoon season and in sediments and the organism in premonsoon season. However, E. coli counts were more in all the media in monsoon season. The E. coli count slightly exceeded the standards set by European Union for Class A waters. In general, THB and MPN E. coli values were the highest in the oyster. Pearson’s correlation showed highly significant positive correlation between THB and E. coli in all the phases. pH and salinity showed highly significant positive correlation with BAF and highly significant negative correlation with DO and rainfall. Conversely, rainfall and BOD showed significant negative correlation with BAF. The present study indicates that the density of E. coli in shellfish at some locations exceeds the standard limit set by Indian Standards.

Interaction of micro and nanoplastics (MNPs) with agricultural stored products and their pests.

Micro and nanoplastics (MNPs) pose significant environmental concerns due to their potential implications for ecosystems and human health. While previous research has primarily focused on the environmental impacts (aquatic ecosystem, soil health) of MNPs, this review investigates their interactions with agricultural stored products, specifically their effects on stored product pests and grain quality. MNPs can infiltrate grains through various pathways, including atmospheric deposition, plastic residues from cultivation, and pest activity. These contaminants may influence pest feeding and behavioral patterns, reproductive cycles, and development. Simultaneously, MNPs have the potential to alter grain properties, including mineral content, protein composition, and starch synthesis, potentially compromising nutritional quality. Understanding these interactions is critical for developing strategies to mitigate the dual threats of MNP pollution and pest infestations to stored agricultural products.

Residual heavy metals and antibiotic pollution in abandoned breeding areas along the northeast coast of Hainan Island, China.

To assess the environmental status of an abandoned aquaculture and breeding area in the northeast coast of the Hainan Island, surface and well water, sediment and surface soils were sampled and analyzed for conventional physicochemical properties, heavy metals and antibiotics. Metagenome tests were also conducted to determine the composition and diversity of the microbial community in typical habitats. Affected by the discharge of wastewater from higher-place pond aquaculture, coastal freshwater rivers have undergone significant salinization, Cl- and Na+ were as high as 4.51×103 and 1.42×103mg/L. The 3 hand-pumped wells surveyed were also suffered from varying degrees of salinization and heavy metal pollution, especially the threat of arsenic pollution. Compared with the local background values, significantly higher valves of Cu, Zn, As and Cd were observed in the surface soil and sediment, and the average concentrations for Cu, Zn, As and Cd are 5.71, 17.6, 15.4 and 0.09mg/kg respectively. For As，the Nemerow index ranges from 7 to 16 and the geoaccumulation index is between 2 and 4, indicating moderate to severe pollution levels in surface soil. 14 antibiotics were detected in the soil and sediment samples, and the highest total amount was 73μg/kg, with tetracycline being the dominant antibiotic. Sediment and forest soil showed different microbial community and the genetic diversity index of sediment was lower than that of the forest soils. For typical vegetation soil, the genetic diversity followed the order as P. elliottii × P. caribaea>Eucalyptus > C. equisetifolia. Among the soil and sediment samples, the highest abundances of antibiotic resistance genes (ARGs) were associated with elfamycin, peptide, rifamycin, and the most common antibiotic resistance mechanisms were antibiotic target alteration (54.5%), antibiotic efflux (27.6%) and antibiotic target replacement (12.1%). The metal resistance genes (MRGs) for Cu, Fe, and Zn resistance were the main MRGs in the samples. This study identified the potential ecological environment risk factors in the abandoned coastal breeding areas, and suggested continuous monitoring and assessment of the residual pollutant abatement processes in the future.

Dynamic impact of polyethylene terephthalate nanoplastics on antibiotic resistance and microplastics degradation genes in the rhizosphere of Oryza sativa L.

This study examined the effects of polyethylene terephthalate (PET) nanoplastics on the rhizosphere of Oryza sativa L., focusing on dynamic changes and interactions among microbial communities, antibiotic resistance genes (ARGs) and microplastic degradation genes (MDGs). PET exposure altered the structure and function of soil microbial, enabling specific microbial groups to thrive in polluted environments. High-dose PET treatments markedly increased the abundance and dissemination of ARGs, primarily via resistance mechanisms such as antibiotic efflux and target alteration. By providing additional carbon sources and surfaces for microbial attachment, PET stimulated the growth of microorganisms harboring MDGs, resulting in an increase in MDGs abundance. The elevated expression of MDGs facilitated the propagation of ARGs, with overlapping host microorganisms suggesting that certain microbial groups exhibit dual metabolic capabilities, enabling them to endure both antibiotic and microplastic pressures. Toxic byproducts of microplastic degradation, such as mono-ethylhexyl phthalate, further promoted ARGs dissemination by increasing horizontal gene transfer frequency. Structural equation modeling revealed that PET indirectly influenced ARGs and MDGs expression by altering soil C/N ratio, available phosphorus, and enzyme activities. Thus, nanoscale PET exacerbates ecological risks to soil microbial communities by driving co-propagation of ARGs and MDGs, highlighting the persistent threat of composite pollution to agroecosystems.

Synergistic design of a graphene oxide-mediated polyaniline/α-Fe2O3 ternary heterostructure: advancing photocatalytic degradation and adsorption efficiency.

With the growing threat of organic pollutants in water bodies, there is an urgent need for sustainable and efficient water decontamination methods. This research focused on synthesizing a novel Z-scheme ternary heterostructure composed of graphene oxide (GO)-mediated polyaniline (PANI) with α-Fe2O3 and investigated its potential in brilliant green (BrG) and ciprofloxacin (CIP) degradation tests under visible light. The ternary composite demonstrated exceptional photocatalytic activity, with the optimized 10%PANI/GO/α-Fe2O3 (10PGF) photocatalyst achieving 99.8% degradation of BrG in 25 min and 93% degradation of CIP in 90 min of irradiation. The 10PGF composite achieved rate constants of 0.222 min-1 for BrG and 0.0295 min-1 for CIP. The rate constant for BrG degradation was 15 and 10 times faster than that for PANI and α-Fe2O3, respectively, while CIP was degraded 8.9 and 6.1 times faster. The degradation of the pollutants was facilitated by both O2˙- and ˙OH, as confirmed by capturing active species, a nitroblue tetrazolium test and use of a PL terephthalic acid probe. The proposed Z-scheme mechanism elucidated charge carrier movements and active species involvement, revealing the enhanced photocatalytic performance of the ternary composite. The 10PGF ternary composite demonstrated exceptional recyclability over five repeated cycles, with XRD analysis confirming no structural changes in the material. Moreover, adsorption studies were also performed, which showed a strong correlation (R2 = 0.974) with Langmuir isotherms and that pseudo-second order kinetics was followed.

Abundance and Distribution of Microplastics in the Waters of Koroe Onowa Village, Wakatobi Regency

The waters of Koroe Onowa Village, Wakatobi Regency, are at risk of plastic waste contamination due to human activities on land that are carried by currents into the waters. Plastic waste is very dangerous for the health of the aquatic environment, especially marine biota, because the accumulation of microplastics over a long period of time can interfere with the respiratory and digestive tracts of marine biota, and has the potential to harm human health. For this reason, research on microplastics in these waters is needed. This study aims to analyze the abundance and distribution of microplastics in the waters of Koroe Onowa Village. Microplastic sampling was carried out using a modified plankton net method, which was then identified based on the type of microplastic. The results of the study showed that there were four main types of microplastics identified, namely fragments, films, fibers, and pellets, with an abundance ranging from 3.2 to 8.86 particles per liter. Station III, which is a coastal tourism area with dense human activity, showed the highest abundance value, namely 8.86 particles/liter. The results of this study provide an initial overview of the threat of microplastic pollution in the waters of Koroe Onowa and form the basis for better monitoring and waste management efforts in the area, as well as the need for mitigation measures to protect marine ecosystems and ensure the sustainability of coastal resources.

Unpacking the drivers and effects of localized flooding in Glefe (Accra) and residents’ autonomous adaptation strategies

ABSTRACT Coastal communities in Ghana face pollution threats from industrial, agricultural, and urban activities. Glefe, which is entirely coastal, is especially vulnerable to these issues, along with tropical storms, rising sea levels, and localized flooding that may result from climate change. The increased demand for land has worsened these situations and attracted a large and diverse body of scholarship. However, residents feel that the local governance structure evokes competing concerns, interests, and ideas, some of which gain traction. This article provides an original and critical analysis of residents’ independent measures to become self-sufficient in facing their vulnerabilities, some of which inadvertently create new hazards. In doing so, it contributes to scholarship on two fronts: First, by exploring the interconnectedness and changeability of the governance structure, the research reveals how poor planning, insufficient stakeholder involvement, inadequate flood infrastructure, and lack of interest from city officials contribute to localized flooding. Second, it adapts the concept of autonomous adaptation to explain and interpret how residents independently respond to these hazards and how their actions sometimes increase their local vulnerability. From a broader perspective, this contributes to understanding relations between individual agencies, organizational behavior, institutions, and social context.

Source and Ecological Risk Assessment of Potentially Toxic Metals in Urban Riverine Sediments Using Multivariate Analytical and Statistical Tools

Multivariate and statistical tool advancements help to assess potential pollution threats, their geochemical distribution, and the competition between natural and anthropogenic influences, particularly on sediment contamination with potentially toxic metals (PTMs). For this, riverine sediments from 25 locations along urban banksides of the River Ravi, Pakistan, were collected and analyzed to explore the distribution, pollution, ecological, and toxicity risk indices of PTMs like Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sb, Sn, Sr, V, and Zn using Inductively Coupled Plasma–Optical Emission Spectrometry (ICP-OES) technique. Additionally, techniques such as X-ray Diffraction (XRD) and Scanning Electron Microscopy–Energy Dispersive X-ray Spectroscopy (SEM-EDS) were employed to investigate the mineralogical and morphological aspects. The results indicated that mean concentrations (mg kg−1) of Cd (2.37), Cr (128), Hg (16.6), Pb (26.6), and Sb (2.44) were significantly higher than reference values given for upper continental crust (UCC) and world soil average (WSA), posing potential threats. Furthermore, the geochemical pollution indices showed that sediments were moderately polluted with Cd (Igeo = 2.37, EF = 12.1, and CF = 7.89) and extremely polluted with Hg (Igeo = 4.54, EF = 63.2, and CF = 41.41). Ecological and toxicity risks were calculated to be extremely high, using respective models, predominantly due to Hg (Eri = 1656 and ITRI = 91.6). SEM-EDS illustrated the small extent of anthropogenic particles having predominant concentrations of Zn, Fe, Pb, and Sr. Multivariate statistical analyses revealed significant associations between the concentrations of PTMs and the sampling locations, highlighting the anthropogenic contributions linked to local land-use characteristics. The present study concludes that River Ravi sediments exhibit moderate levels of Cd and extreme pollution by Hg, both of which contribute highly to extreme ecological and toxicity risks, influenced by both natural and anthropogenic contributions.

Determination of noise levels and effects in noise sensitive areas case study: Sakarya province Serdivan district of Turkey.

Noise pollution has become an important type of environmental pollution, especially in populated areas, due to changes in transportation preferences and industry development. The World Health Organization reports that noise, along with air and water pollution, poses one of the most dangerous pollution threats in big cities. In this study, noise pollution measurements were carried in two different regions of a major city, focusing on sensitive points such as hospitals and schools. Surveys were administered to local residents in these areas to assess levels of annoyance due to traffic noise and awareness of noise pollution. The results show that the measured noise levels exceed the 55dB(A) limit set by the Turkish Ministry of Environment, Urbanization, and Climate Change, as well as WHO noise guideline values. According to the survey findings, it was determined that a majority of respondents in both regions demonstrated awareness of noise pollution. The study further revealed that while 19% of respondents reported high levels of annoyance due to traffic noise, they were more disturbed by industrial machinery and construction activities. Concerning the health effects of noise pollution, a greater number of participants in both regions reported experiencing headaches. Based on these findings, the study identifies sources of noise pollution beyond traffic noise that contribute to discomfort in sensitive areas, highlights the significant health impacts of noise pollution on individuals, and proposes potential solutions.

Construction of 1D Molecular Conductive Wires Through a Polarized Gene Weaving Strategy for Efficient Electromagnetic Wave Absorption.

The growing threat of electromagnetic pollution has become a pressing safety concern. Metal-organic framework (MOF) derivatives are considered ideal candidates for mitigating electromagnetic radiation. However, due to the limitations imposed by complex post-processing and disruption of pristine crystal structures, the mechanisms of electromagnetic wave absorption remain unclear, let alone achieving atomic-level regulation in MOF derivatives. Moreover, research on MOF-based electromagnetic wave absorbers (EMWA) has predominantly focused on 2D and 3D structures, leaving 1D MOFs largely unexplored. To address these challenges, a bottom-up polarization gene weaving strategy is proposed to integrate polarizable conjugated groups, thieno(3,2-b)thiophene (TBTT), into two types of conductive MOFs by fine-tuning self-assembly conditions. As expected, both MOFs exhibited strong natural polarization effects. Among them, the 1D linear coordination mode of CuTBTT-1D demonstrated enhanced charge carrier mobility and geometric effects compared to the 2D structure, CuTBTT-2D. The synthesized 1D molecular polarization wire, with a thickness of 2.2mm, achieved ultra-high reflection loss (-77dB) and super-wide absorption bandwidth (6.52GHz). Its performance surpasses that of all known MOF-based EMWAs. This study provides a valuable strategy for the rational design of next-generation 1D MOF EMWA with atomic precision.

The Ecological Implication of Microplastic in Crabs from a Tropical Lagoon: Ingested Microplastic in Mud Crab Scylla serrata

Large plastic items in the environment are degraded into tiny pieces known as microplastics (MPs). MP contamination in tropical lagoon ecosystems poses a significant pollution threat. The mud crab, Scylla serrata, is an important crustacean in the tropical lagoon, valued as a key source of edible seafood in Asia and Europe. The potential MPs of one hundred samples were examined using the stereomicroscope for characterisation, and further analysis was conducted using µ-FTIR. A total of 1157 MPs were found in the gills and gastrointestinal tract. The mean abundance (±SD) of MP in mud crabs was 11.57 ± 6.29 items/individual. MPs were detected in both tissues, displaying a variety of colours. Transparent MPs dominated the gills at 43.9%, while blue microplastics were prevalent in the gastrointestinal tract at 32.8%. The filament (fibre) was the most prominent MP type found in the gills and gastrointestinal tract. The collected MPs from both tissues were categorised into four size ranges: 0.05–0.25 mm and 1.00–5.00 mm were the common size ranges in the gills and gastrointestinal tract, respectively. The prominent polymer type was rayon. These findings provide considerable proof of MP contamination in the mud crab species Scylla serrata and its implications for food security.

Assessing the Proposed Designation of Nusa Penida and Gili Matra in the Lombok Strait as a Particularly Sensitive Sea Area (PSSA)

Abstract The Lombok Strait, located in the Indonesian Archipelagic Sea Lane (IASL) II, serves as an international shipping route and is also crossed by ferries between Bali and Lombok Islands. The potential increase in international shipping trafBic could pose a threat of marine pollution due to shipping activities, such as ship accidents and operational discharges from ships. There are two areas in the Lombok Strait that have been designated as national marine conservation areas by the Indonesia government, namely Nusa Penida Island and Gili Matra Island. The rich marine biodiversity of the Lombok Strait, especially in Nusa Penida and the Gili Islands, should be protected from the threats posed by international shipping activities. This study aims to assess the necessity of designating the Lombok Strait as a Particularly Sensitive Sea Area (PSSA). The newly established routing systems, TrafBic Separation Schemes (TSS) in the Lombok Strait, can be adopted as Associated Protective Measures (APMs) within the designation of a PSSA. Risk assessment was implemented to demonstrate the exposed risks of international shipping activities that could threaten the marine ecosystem and evaluate the effectiveness of the TSS as an associated protective measure. Based on reviews to meet at least one of the criteria for designation as a PSSA, Nusa Penida and Gili Matra have its the signiBicance of its ecological, socio-economic & culture, and marine trafBic characteristics. The total annual frequency of ship collision is 3.32E-03. In conclusion, the implementation of TSS as the existing APM has proven effective in reducing the risk of ship collision in Lombok Straits by 60.3% compared to frequency ship collision before TSS.

Unraveling Plastic Pollution in Protected Terrestrial Raptors Using Regurgitated Pellets

The threat of plastic pollution has escalated to unprecedented levels, with particular concern surrounding microplastics (MPs) and artificial fibers or particles (AFs) due to their wide distribution across ecosystems and their bioavailability to wildlife. Although research on the impact of plastic on wild birds is rapidly growing, knowledge of terrestrial species remains limited, especially regarding raptors, which have been significantly understudied. Here, we investigated the prevalence of MPs and AFs in regurgitated pellets from six protected terrestrial raptor species, namely the Cinereous Vulture (Aegypius monachus), the Bonelli’s Eagle (Aquila fasciata), the Little Owl (Athene noctua), the Lesser Kestrel (Falco naumanni), the Red Kite (Milvus milvus), and the Barn Owl (Tyto alba), collected between 2022 and 2023. Our analysis revealed that 68% of the pellets contained MPs (47 out of 69), and 81% contained AFs (56 out of 69). Additionally, two macroplastics were found inside the pellets: a cable tie in a Red Kite and a bird identification ring in a Cinereous Vulture. The concentrations (mean ± standard error of the mean) were 2.39 ± 0.39 MPs/pellet and 5.16 ± 0.72 AFs/pellet. The concentration of MPs and AFs varied significantly among some of the studied species; however, no significant differences were observed among urban, rural, and protected areas. This could indicate that contamination levels are mainly related to the type of species. Fibers emerged as the predominant contaminant shape, with six different polymers identified, among which PET, PE, and acrylics were the most prevalent. These findings highlight that plastic pollution has reached protected terrestrial raptors and that the impact of plastic on their life cycles needs to be assessed.

TRACKING THE FUTURE OF THE OCEAN FROM PERSPECTIVE PRESENT AND PAST HISTORY

This article aims to discuss the future history of the ocean from a past and present perspective, focusing on how historical patterns and current data can be used to predict future challenges and opportunities that marine ecosystems and coastal communities may face. Key questions explored in this study include the impact of climate change on marine biodiversity, the threat of plastic pollution, potential geopolitical conflicts in strategic sea lanes, as well as implications for maritime economics and food security. In terms of conceptual framework studies, this paper uses continuity theory and future uncertainty theory used to analyze the relationship between past changes, current conditions, and future potential in maritime ecosystems. In terms of methodology, the study will use qualitative methods through the analysis of marine history literature and maritime science, as well as the use of simulation methods and predictive models to study future trends. This article also applies maritime climate change theory, maritime geopolitical theory, and maritime economic sustainability theory to support discussions and predict possible future scenarios. The results of this study show that the future history of the ocean depends not only on scientific data but also on the understanding of historical and social contexts, which can help shape a more comprehensive and sustainable ocean management strategy.

СУ ҚАУІПСІЗДІГІ: ФОРСАЙТ-ЗЕРТТЕУЛЕР ПРИЗМАСЫ АРҚЫЛЫ НЕГІЗГІ АСПЕКТІЛЕР МЕН ПЕРСПЕКТИВАЛАР

In the modern world, water security issues are becoming increasingly relevant and are key to ensuring the sustainable development of society. The world community faces serious challenges related to the threats of pollution of water sources, climate change, ecosystem instability and inefficient management of water resources. Solving these problems requires not only immediate measures, but also long-term strategies that can ensure the preservation of water security for the future. The research work is an analytical review of current problems in the field of water security and possible strategic solutions to solve them using foresight research methods. The article highlights the current threats and challenges facing water resources in the modern world, and discusses the advantages and effectiveness of applying foresight research methods in this area. Within the framework of the conducted scientific research, the key areas of strategic planning for ensuring water security in the future are highlighted through the highlighted through the analysis of the current state and forecasting potential changes in the water sector.

Managing phosphorus input pressures for improving water quality at the catchment scale

Phosphorus (P) pollution of freshwater is an endemic threat to water quality and aquatic biodiversity. To better define the contributions of the two main food system sectors (agriculture and wastewater) responsible for freshwater P pollution, we investigated how the magnitude and distribution of sector P input pressures calculated using Substance Flow Analysis (SFA) linked to the P pollution threat across four distinct physiographic regions of the River Stour catchment (1260 km2) in Dorset, England. Agricultural P input pressures (−1 to 7 kg ha−1 yr−1) were dependent on the amount of livestock feed imports and resulting manure loadings to land, whilst food imports and population densities were the main driver of the human net P inputs of up to 13 kg ha−1 yr−1. Total P input pressures (i.e. Net Anthropogenic P Inputs (NAPI)) were positively correlated (r2 0.8–0.9) to riverine P flux of up to 6 kg ha−1 yr−1 across the catchment. Using measured river P concentration (C) and flow discharge (Q) analysis to distinguish monitoring stations capturing mainly diffuse P sources (termed diffuse stations), estimated riverine P fluxes attributable to agriculture varied up to 0.92 kg ha−1 yr−1 depending on the surplus P inputs applied to land. A combination of enhanced wastewater P removal and reduced surplus agricultural P inputs was required to improve water quality. For example, the P pressure-river P flux relationship at diffuse stations suggested that in the catchment area dominated by livestock production, removing the agricultural P surplus of 7 kg ha−1 yr−1 would reduce annual average river SRP concentrations in this area by a third to 0.23 mg L−1, but still well above the target concentration for eutrophication control (0.08 mg L−1). Our approach of linking SFA outputs to measured river P data provides a potential complimentary and internationally relevant methodology to evidence effective sector mitigation targets and policies in catchments, and its further testing in other catchments is recommended.

Potential Threat of Microplastic Pollution on Coastal-Marine Ecosystem– An Emerging Economic Setback and Question to Blue Economy?

Potential Threat of Microplastic Pollution on Coastal-Marine Ecosystem– An Emerging Economic Setback and Question to Blue Economy?

Exploring the determinants of online health service usage intentions under the threat of air pollution.

The rapid evolution of online health services (OHS) has significantly improved healthcare accessibility. However, the impact of air pollution on individuals' willingness to engage with OHS remains underexplored in the existing literature. This study addresses this gap by investigating how air pollution threats influence the intention to use OHS, grounded in Protection Motivation Theory (PMT) and Rational Choice Theory (RCT). Using cross-sectional survey data, a theoretical model was developed and tested to examine the relationships between threat appraisal, coping appraisal, perceived benefits, perceived costs, and OHS usage intentions. The findings indicate that threat appraisal, coping appraisal, and perceived benefits positively affect the intention to use OHS, while perceived costs negatively impact usage intention. Additionally, age significantly moderates the relationship between coping appraisal and the intention to use OHS. This study extends the application of PMT and RCT in the context of OHS. It provides valuable insights into the factors influencing users' intentions to utilize these services, with implications for improving OHS adoption in environments affected by air pollution.

Survey on machine vision-based intelligent water quality monitoring techniques in water treatment plant: Fish activity behavior recognition-based schemes and applications

Abstract Water is a vital resource essential to the survival and development of all creatures. With the rapid growth of industry and agriculture, people face a severe threat of ecological destruction and environmental pollution while living earthly lives. Water pollution, in particular, harms people’s health the most. As a result, water supply security has become a top priority. As a critical point in water supply safety, monitoring water quality effectively and forecasting sudden water contamination on time has become a research hotspot worldwide. With the rapid development and wide applications of artificial intelligence and computer vision technologies, biological activity identification-based intelligent water quality monitoring methods have drawn widespread attention. They were taking fish activities as the water-quality indicator has gained extensive attention by introducing advanced computer vision and artificial intelligence technologies with low cost and ease of carrying. This article comprehensively reviews recent progress in the research and applications of machine vision-based intelligent water quality monitoring and early warning techniques based on fish activity behavior recognition. In detail, it addresses water quality-oriented fish detection and tracking, activity recognition, and abnormal behavior recognition-based intelligent water quality monitoring. It analyzes and compares the performance and their favorite application conditions. Finally, it summarizes and discusses the difficulties and hotspots of water quality monitoring based on the fish’s abnormal behavior recognition and their future development trends.