Environmental Monitoring and Assessment最新文献

{"title":"Changes in hydrodynamics and water quality of a subtropical meromictic urban lake.","authors":"Hengyu Wei, Hong Zhang, David P Hamilton, Fuxin Zhang, Steven McVeigh","doi":"10.1007/s10661-025-14347-1","DOIUrl":"10.1007/s10661-025-14347-1","url":null,"abstract":"<p><p>Coastal canal and waterway development has expanded rapidly over the past half-century, contributing to environmental issues such as declining water quality and saltwater intrusion. This study analysed 35 years of field sampling data from a subtropical meromictic lake to investigate water quality changes caused by intermittent saltwater intrusion. Saltwater intrusion began after a canal expansion converted a stormwater pipe into a bidirectional conduit, allowing saltwater to flow into the lake during high tides. Lake surface water temperature increased at a rate of 0.019 °C p.a. and pH has shifted from acidic to circumneutral over the study period, likely due to the disturbance of a pyrite layer during the initial construction phase and progressive increases in trophic state. Salinity accumulation in the bottom waters has caused the lake to transition from monomictic to meromictic, with stratification increasing through the 1990s, as evidenced by increases in Schmidt stability index. This shift to meromixis has resulted in permanent bottom-water deoxygenation and has led to eutrophication, evidenced by elevated nutrient levels and the development of a deep chlorophyll layer at the chemocline of the lake within recent years. This study provides valuable insights for managing other coastal lakes and wetlands experiencing similar challenges, offering guidance on mitigating the adverse impacts of saltwater intrusion that may increase with sea level rise due to climate change.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"918"},"PeriodicalIF":2.9,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12263782/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of magnetic nanomaterials in wastewater treatment: a review.","authors":"Sara Yaqoob, Muhammad Asif Hanif","doi":"10.1007/s10661-025-14292-z","DOIUrl":"https://doi.org/10.1007/s10661-025-14292-z","url":null,"abstract":"<p><p>The growing need for clean water, as well as the mounting problems of water pollution, have prompted the development of innovative and efficient water treatment technologies. The unique qualities of magnetic nanomaterials (MNMs), including their large surface area, magnetic responsiveness, and ease of functionalization, have made them a potential option. MNMs are produced via chemical, physical, or biological means. MNMs are used in membrane filtration, adsorption, catalysis, and magnetic separation for the treatment of wastewater. They may adsorb contaminants, act as catalysts, improve membrane filtering performance, and enable facile recovery and reuse via magnetic separation. MNMs have high specificity, efficiency, and recyclability, but they confront environmental and health risks, high production costs, and scaling concerns. Therefore, the ongoing research must focus on eco-friendly approaches, improving stability, studying synergistic effects, and conducting risk analysis of MNMs to ensure safe use. Moreover, the MNMs investigated are only applicable for synthetic or small-scale wastewater treatment. Only a few MNMs are operating at an industrial level; therefore, more investigation is suggested for the applicability of MNMs on a large scale and real wastewater treatment.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"917"},"PeriodicalIF":2.9,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of the environmental status of agriculturally influenced streams of different orders in the Pampeana region of Argentina.","authors":"Capeletti Julieta, Alberto Diana, Facelli Florencia, Zilli Florencia","doi":"10.1007/s10661-025-14366-y","DOIUrl":"https://doi.org/10.1007/s10661-025-14366-y","url":null,"abstract":"<p><p>The increase in the extension of agricultural lands has an impact on streams all over the world, affecting water quality depending on river size. The aim of our work was to describe the ecological status of streams of different orders immersed in an agricultural matrix through physicochemical and biological indicators (vegetation and macroinvertebrates). Data was gathered at 11 streams of different orders according to Strahler's scale, in a basin located in an agricultural matrix. The streams were found to have high concentrations of nutrients and chlorophyll a, with minimal differences in physicochemical indicators among riverine ecosystems of various sizes. The riparian habitats indicators showed the lowest values in the first-order streams, while river habitat indicators showed no differences between stream orders. Most of the found macroinvertebrates taxa are tolerant to organic contamination, and they were distributed uniformly throughout the basin, to which the streams belong. We conclude that first-order streams are the most adversely affected by agricultural land use, with the highest concentrations of nutrients and chlorophyll a, the lowest QBR values, and the greatest abundance of tolerant taxa. Second and third-order streams showed fewer signs of alteration than first-order streams, with higher QBR values and lower concentrations of nutrients and chlorophyll a. In addition, the metrics for tolerant taxon richness (total number of taxa, genera, families, and predators) showed lower values.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"916"},"PeriodicalIF":2.9,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Natural radioactivity levels and related risk assessment in soil and rock samples from the Çine submassif, defining Western Anatolia, Turkey.","authors":"Selin Erzin, Gunseli Yaprak, Osman Candan, Zubeyir Sagözen, Serkan Gurleyen, İlker Sert, Caner Taşköprü, Berkay Camgöz","doi":"10.1007/s10661-025-14370-2","DOIUrl":"https://doi.org/10.1007/s10661-025-14370-2","url":null,"abstract":"&lt;p&gt;&lt;p&gt;In this paper, the natural radioactivity levels and related radiological hazards in rock and soil samples from the Çine submassif, including all lithological units in Central-Western Anatolia, Turkey, were investigated. To achieve this, 15 rock samples and 15 surface soil samples were collected from 15 stations representing the geological structures of the Çine submassif. Rock samples are dominated by high-grade metamorphic rocks derived from granitic and litharenitic/subarkosic sandstones. The activity concentrations of natural radionuclides &lt;sup&gt;226&lt;/sup&gt;Ra, &lt;sup&gt;232&lt;/sup&gt;Th, and &lt;sup&gt;40&lt;/sup&gt;K, designated C&lt;sub&gt;Ra&lt;/sub&gt;, C&lt;sub&gt;Th&lt;/sub&gt;, and C&lt;sub&gt;K&lt;/sub&gt;, in the collected rock and soil samples were measured using a high-purity germanium detector system. The mean C&lt;sub&gt;Ra&lt;/sub&gt;, C&lt;sub&gt;T&lt;/sub&gt;, and C&lt;sub&gt;K&lt;/sub&gt; values for the rock samples were found to be 33.67 ± 3.47 Bq kg&lt;sup&gt;-1&lt;/sup&gt;, 47.00 ± 3.47 Bq kg&lt;sup&gt;-1&lt;/sup&gt;, and 871.20 ± 56.08 Bq kg&lt;sup&gt;-1&lt;/sup&gt;, respectively. The respective mean values for the soil samples were found to be 40.00 ± 3.54 Bq kg&lt;sup&gt;-1&lt;/sup&gt;, 51.40 ± 3.94 Bq kg&lt;sup&gt;-1&lt;/sup&gt;, and 833.93 ± 50.94 Bq kg&lt;sup&gt;-1&lt;/sup&gt;, respectively. The mean value of C&lt;sub&gt;Ra&lt;/sub&gt; for rock samples was within the worldwide permissible limits of 35 Bq kg&lt;sup&gt;-1&lt;/sup&gt;. However, both the mean value of C&lt;sub&gt;Ra&lt;/sub&gt; in soil samples and the mean values of C&lt;sub&gt;Th&lt;/sub&gt; and C&lt;sub&gt;K&lt;/sub&gt; in both rock and soil samples were above the globally accepted values reported by UNSCEAR. Twelve radiological health hazard indices, namely indoor and outdoor absorbed dose rates (ADR&lt;sub&gt;in&lt;/sub&gt; and ADR&lt;sub&gt;out&lt;/sub&gt;), indoor and outdoor annual effective dose rates (AEDR&lt;sub&gt;in&lt;/sub&gt; and AEDR&lt;sub&gt;out&lt;/sub&gt;), indoor and outdoor excess lifetime cancer risks (ELCR&lt;sub&gt;in&lt;/sub&gt; and ELCR&lt;sub&gt;out&lt;/sub&gt;), annual gonadal dose equivalent (AGDE), radium equivalent activity (Ra&lt;sub&gt;eq&lt;/sub&gt;), external and internal hazard indices (H&lt;sub&gt;ex&lt;/sub&gt; and H&lt;sub&gt;in&lt;/sub&gt;), and gamma and alpha indices (I&lt;sub&gt;γ &lt;/sub&gt;and I&lt;sub&gt;α&lt;/sub&gt;), were calculated for both soil and rock samples and then compared with worldwide averages. The mean values of all ADR&lt;sub&gt;in&lt;/sub&gt;, ADR&lt;sub&gt;out&lt;/sub&gt;, AEDR&lt;sub&gt;in&lt;/sub&gt;, AEDR&lt;sub&gt;out&lt;/sub&gt;, ELCR&lt;sub&gt;in&lt;/sub&gt;, ELCR&lt;sub&gt;out&lt;/sub&gt;, and AGDE indices for both rock and soil samples are above the UNSCEAR acceptable limits. However, the mean Ra&lt;sub&gt;eq&lt;/sub&gt; values for rock and soil samples were 167.96 and 177.71 Bq kg&lt;sup&gt;-1&lt;/sup&gt;, respectively, and thus below the UNSCEAR limit of 370 Bq kg&lt;sup&gt;-1&lt;/sup&gt;. In addition, the average values of the H&lt;sub&gt;ex&lt;/sub&gt;, H&lt;sub&gt;in&lt;/sub&gt;, I&lt;sub&gt;γ&lt;/sub&gt; and I&lt;sub&gt;α&lt;/sub&gt; indices were found to be less than one, indicating that they are below acceptable limits and therefore pose no risk to the people living in the investigated region. The radiological health hazard indices determined in this study can be contributed to the database of natural radioactivity levels in the Çine submassif, defining Western Anatolia, Turke","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"919"},"PeriodicalIF":2.9,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macrobenthic invertebrate structure, diversity, and water quality indicators in Jhelum tributaries of Kashmir Himalaya.","authors":"Zahoor Ahmad Mir, Yahya Bakhtiyar, Muni Parveen, Niyaz Ali Khan, Maqsooda Akhtar, Sinan Nissar","doi":"10.1007/s10661-025-14346-2","DOIUrl":"https://doi.org/10.1007/s10661-025-14346-2","url":null,"abstract":"<p><p>Macrobenthic invertebrate communities are groups of large, bottom-dwelling organisms without backbone that inhabit aquatic environments such as streams, rivers, ponds, wetlands, lakes, and oceans. These communities represent diverse invertebrate groups which include aquatic worms, leeches, clams, snails, amphipods, crabs, aquatic mites, and insect larvae. Macrobenthic invertebrates are regarded as primary functional feeding groups in the fluvial ecosystems and an outstanding tool for monitoring the water quality. Our study aimed to investigate the community structure and diversity of macrobenthic invertebrates along with the water quality of Jhelum tributaries from Kashmir Himalaya. In the entire study, a total of 49,681 individuals of macrobenthic invertebrates were collected, belonging to 3 phyla and 51 families. The maximum abundance and richness were observed in Arthropoda followed by Mollusca and Annelida. The overall range of the Shannon-Wiener index ranged from 1.79 to 3.70 in the Aripal stream and 1.60‒3.74 in the Watalara stream, which indicates a moderate clear water quality in the streams. The maximum abundance, richness, and diversity were reported in the midstream region of both tributaries and during summer and autumn seasons. The overall dataset suggests that temperature and nutrients have a major influence on the diversity, richness, and abundance of the streams. Canonical correspondence analysis revealed that the taxa show a positive correlation with temperature and nutrients indicative of tolerant and semi-tolerant families respectively whereas the taxa showing a negative correlation with nutrients and ions reflect sensitive families. The dendrogram confirmed the spatial distribution of macrobenthic invertebrate families into three categories wherein cluster-I, cluster-II, and cluster-III represent the presence of sensitive, semi-tolerant, and tolerant families, respectively. Based on the values of biotic scores, sites A1, W1, A2, and W2 lie under class I water quality with high ecological status and none to very slight organic pollution while sites A3 and W3 lie under class II water quality with good ecological status and presence of moderate pollution. The structure and assemblage pattern of macrobenthic invertebrates along with the water quality status provide information about the ecological stability of the stream ecosystem. These aspects also give important clues to the functional status of the Himalayan stream ecosystem depicting an apparent gradient in the stream substratum, habitat, and water quality. The prevalence of aquatic insects reflects the diversity in the form and habitat, presence of functional feeding groups, strong dispersal capability, and colonization of microhabitats in the streams. The overall study focuses on the ecological importance of macrobenthic invertebrates along with the health status of fluvial ecosystem.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"915"},"PeriodicalIF":2.9,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing land degradation and drought vulnerability in the Trans-Gangetic Plains using Google Earth Engine and remote sensing for SDG 15.3.1 monitoring.","authors":"Subhradip Bhattacharjee, Basavareddy, Vishnu D Rajput, Divyacrotu Majumder, Amitava Panja, Suryakanta Kashyap, Rakesh Kumar","doi":"10.1007/s10661-025-14371-1","DOIUrl":"https://doi.org/10.1007/s10661-025-14371-1","url":null,"abstract":"<p><p>The Trans-Gangetic Plains (TGP) is a distinct region in northwestern India encompassing the states of Punjab, Haryana, the union territories of Delhi and Chandigarh, and the Ganganagar district of Rajasthan. Although the region plays a critical role in India's food security through substantial wheat and rice production, it is increasingly threatened by land degradation and drought vulnerability. Existing studies often lack integrated, large-scale assessments combining land degradation and drought analysis in this region. Addressing this gap, the present study utilizes Google Earth Engine and remote sensing-based SDG 15.3.1 indicators to evaluate land productivity, soil organic carbon loss, land cover change, and drought susceptibility across the TGP. The assessment reveals a 214% surge in artificial land cover between 2001 and 2022, primarily at the expense of grasslands, wetlands, and croplands, leading to declines in biodiversity, carbon sequestration, and soil water retention. Additionally, 2.93% of the area showed soil organic carbon degradation, further stressing ecosystem health. Despite relative stability in agricultural productivity, recurrent moderate to severe droughts affected over 75% of the region in peak years (e.g., 2002, 2009, 2014), largely driven by El Niño events and groundwater overextraction. The findings highlight that the western and central TGP regions are particularly vulnerable and emphasize the need for integrated site-specific soil and water conservation strategies. This study demonstrates the effectiveness of open-source remote sensing platforms for large-scale degradation monitoring and suggests that integrating climate-smart agriculture and afforestation programs will be vital to enhancing resilience and achieving long-term sustainability.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"920"},"PeriodicalIF":2.9,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unravelling the long-term river health status of Kruger National Park Rivers using macroinvertebrate-based monitoring.","authors":"Hendrik Sithole, Samuel N Motitsoe, Thendo Mutshekwa, Musa C Mlambo","doi":"10.1007/s10661-025-14343-5","DOIUrl":"10.1007/s10661-025-14343-5","url":null,"abstract":"<p><p>The burgeoning population growth and landscape developments over the last decades have had a profound effect on natural resources including riverine water quality and quantity. This resulted in increased pollution events, loss of aquatic biodiversity and the introduction of alien invasive species, which cumulatively have transformed freshwater ecosystem structure, processes and functions. Macroinvertebrate-based biomonitoring, like the South African Scoring System version 5 (SASS5), is a fast and effective way to assess water and habitat quality. However, studies reporting long-term biomonitoring are rare in many Global South systems. Also, river health within protected areas is generally regarded better than those outside, with the park potentially offering refugium and ideal conditions for rivers to recover. However, Kruger National Park (KNP) rivers get impacted by mining and domestic sewage upstream, before entering the park, and it is not clear how much remediation happens as the rivers flows downstream within the park. The current study was initiated to investigate the long-term river health status of four major river systems flowing across the iconic KNP, using SASS5 biomonitoring and selected physico-chemical parameters. Our results showed that SASS5 indices showed difference in their sensitive to anthropogenic impacts, both in space and time. Long-term dataset revealed that the ability of the rivers to recover from poor to good quality (and vice versa) was quite rapid, and also some rivers were progressively declining (e.g. Olifants and Crocodile rivers) while others were improving (e.g. Luvuvhu and Sabie rivers). Consequently, SASS5 appeared to be a useful tool in assessing the long-term health of KNP rivers, providing valuable insights into the overall ecological conditions and water quality of these important aquatic ecosystems that will assist in the park water resource management strategies. Further, our results demonstrated high sensitivity and quick response of macroinvertebrates to disturbance, and an improvement potential as the rivers transversed the park.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"914"},"PeriodicalIF":2.9,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12259783/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of chromophoric dissolved organic matter and UV-VIS spectra of Almada River blackwaters, Northeastern Brazil.","authors":"Marcelo Friederichs Landim de Souza, Carolina Santos Silva de Almeida, Daniela Mariano Lopes da Silva","doi":"10.1007/s10661-025-14365-z","DOIUrl":"https://doi.org/10.1007/s10661-025-14365-z","url":null,"abstract":"<p><p>Blackwater rivers draining forested areas rich in organic soils are globally relevant because they mobilize large quantities of terrestrial dissolved organic carbon (DOC) and colored dissolved organic matter (CDOM) downstream, and export disproportionately large amounts of these compounds by drainage area to the ocean. This study investigated the optical properties and sources of CDOM in the lower portion of the Almada River watershed, located in the Eastern Brazil Basin between latitudes 14° 35'S and 14° 46'S and longitudes 39° 17'W and 39° 03'W, a region increasingly affected by deforestation. Water samples were collected during six campaigns from June 2022 (dry season) to January 2023 (rainy season) at seven sites along the river. Fluorescent CDOM (FDOM) and UV-VIS absorption spectra were analyzed to infer CDOM characteristics and composition. DOC and specific absorbance at 254 nm (SUVA₂₅₄) were also estimated. Results revealed that humic-like DOM predominates throughout the basin. Lower concentrations of FDOM, DOC, and aromatic compounds downstream evidence the microbial degradation and photooxidation along the river course. Elevated FDOM and α₂₅₄ near a tributary confluence point to distinct CDOM sources likely associated with a lagoon-connected channel, a large riparian wetland, and possibly a landfill leachate. Seasonal variations showed increased CDOM quantity and aromaticity during the rainy season, attributed to enhanced leaching from forest soils, despite ongoing deforestation. This work is the first study conducted to evaluate CDOM characteristics in the region and contributes to a better understanding of DOM dynamics in tropical blackwater rivers, which are recognized as major contributors to global DOC fluxes.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"911"},"PeriodicalIF":2.9,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144625119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drainage source, distribution characteristics and risk assessment of bisphenol analogues in irrigation canal: a case study in hilly areas in South China.","authors":"Huili Luo, Xiaopeng Pan, Yixuan Yang, Yilu Huang, Yuhang Xiang, Anxin Li, Jia Zhao","doi":"10.1007/s10661-025-14358-y","DOIUrl":"https://doi.org/10.1007/s10661-025-14358-y","url":null,"abstract":"<p><p>Bisphenol analogues (BPs), the endocrine-disrupting compounds, have been detected in water, sediment, and even agricultural products. Irrigation is the main way for material migration, and it has been suggested as one of the sources of BPs. But the attention to irrigation water and sediment, and further to the ecological risks, is rare. In a hilly irrigation area in southern China, the partition and accumulation, contribution sources, and potential ecological risk of four bisphenols (BPA, bisphenol S, F, and AF) in the irrigation canal were investigated in the spring of 2023 and 2024. All four BPs were detected in the irrigation water and sediment. BPF was the dominant of 19.6-60.9 ng/L in water, while BPA was still the prominent compound (46.2-54.4% of ∑BPs) in sediment. BPs in the irrigation canal were related to the direct discharge of aquaculture, domestic, and planting drainage. Although low risks for each compound, the comprehensive risk (∑RQ) of sediments went into medium risk. BPF and BPA were the main risk contributors. BPs in sediments increased steadily during the investigation. The special accumulative point was where slow flow maintained, especially caused by the hilly change. This comprehensive study of BPs in hilly irrigation canals should be valuable for reference in similar areas. And it will be beneficial for environmental protection and production safety.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"910"},"PeriodicalIF":2.9,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144625120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developing smart phone-based image scanning densitometric method for on-site analysis of Cr(VI), Ni(II), and Fe(II) in aqueous medium for monitoring environmental and biological samples.","authors":"Waheed-Uz-Zaman, Rabia Rehman, Asad Abbas, Reem I Alsantali, Zahrah T Al-Thagafi, Maha E Al-Hazemi, Liviu Mitu, Fadi Alakhras","doi":"10.1007/s10661-025-14364-0","DOIUrl":"https://doi.org/10.1007/s10661-025-14364-0","url":null,"abstract":"<p><p>The main objective of this work is to introduce \"image scanning densitometry\" for the elimination of drawbacks of the spectrometric methods, which are conventionally used for analysis of metal ions in aqueous samples. This method is beneficial because a small amount of analyte was used for toxicological chemical analysis in medical diagnostics and environmental monitoring along with its portable nature for on-spot analysis by integrating AI technology with conventional methods. By using this method, colorimetric reactions are performed on TLC plates and results are quantified by digitizing the area of spots by using image scanning devices and specially developed software. The analyte concentration is proportional to the RGB (red, green, blue) color densities of the quantified spots. The raw color densities of the spots were transformed by using Kubelka-Munk transformation in results, which give information about the different dynamic ranges. Different metals, such as nickel (II), chromium (VI), and iron (II), were quantified by using their aqueous samples for monitoring toxic contaminants of water streams. The detection limits are 3.8, 3.94, and 6.78 ppm for Cr(VI), Ni(II), and Fe(II) correspondingly.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 8","pages":"913"},"PeriodicalIF":2.9,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}