Emerging Contaminants最新文献

{"title":"Insights into bacterial resistance to contaminants of emerging concerns and their biodegradation by marine bacteria","authors":"Hatice Turan ,&nbsp;Bahia Khalfaoui-Hassani ,&nbsp;Alisson Godino-Sanchez ,&nbsp;Zulfatun Naimah ,&nbsp;Mathieu Sebilo ,&nbsp;Rémy Guyoneaud ,&nbsp;Mathilde Monperrus","doi":"10.1016/j.emcon.2024.100332","DOIUrl":"10.1016/j.emcon.2024.100332","url":null,"abstract":"<div><p>Contaminants of Emerging Concern (CECs) are human-made chemicals that remain unregulated. The continuous detection of CECs in aquatic ecosystems, due to their incomplete removal, emphasizes the importance of understanding their fate and impact on the environment and human health. The detrimental effects of CECs on marine eukaryotes are well documented in multiple studies. However, their impact on marine bacteria and their biodegradation by these organisms are not well understood. In this study, two marine bacteria, <em>Priestia</em> sp. 35 ODPABA G14 and <em>Rhodococcus</em> sp. 23 AHTN G14, previously isolated from submarine sediments, were used. These two strains were tested for their resistance as well as their capacity to degrade different classes of hydrophobic and hydrophilic CECs, including synthetic musks, UV filters, pesticides and pharmaceuticals. Both strains showed high resistance to all of the hydrophobic tested CECs even up to 500 mg L⁻¹. Only Ketoprofen was toxic to bacterial cells, particularly to <em>Rhodococcus</em> sp. starting at concentration as low as 4 mg L⁻¹. Furthermore, <em>Priestia</em> sp. and <em>Rhodococcus</em> sp. strains exhibited high biodegradation potential, especially for hydrophobic compounds. Although this may not apply to all pollutants, the data presented in this study suggest a positive correlation between marine bacterial resistance to CECs and their high biodegradation potentials.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100332"},"PeriodicalIF":6.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000337/pdfft?md5=fb4cbc1f8a97a11cb12a9e380b1f3c25&pid=1-s2.0-S2405665024000337-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140275589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Perturbations in the earthworm metabolite profile during a two-week exposure to metformin","authors":"J.D. Gillis ,&nbsp;G.W. Price ,&nbsp;S.O. Prasher","doi":"10.1016/j.emcon.2024.100331","DOIUrl":"10.1016/j.emcon.2024.100331","url":null,"abstract":"<div><p>Metformin is among the most prescribed pharmaceuticals in many countries, and as a result has shown up in biosolids derived from municipal wastewater treatment that are destined for land application. In humans taking metformin, the effects include reduced glucose uptake in the intestine, a reduction in gluconeogenesis, increased oxidation of fatty acids, and reduced fatty acid synthesis. The effects of metformin on soil-dwelling organisms are not well understood. This study tested the effects of metformin exposure (0, 10, 40, 160, 640 μg g⁻¹) on the earthworm (<em>E. fetida</em>) at four time points (6 h, 2 d, 7 d, and 14 d) using GC-MS to reveal sub-lethal effects and elucidate potential modes of action for metformin. There were no mortalities observed, and earthworms exposed to the highest concentrations (160 and 640 μg g⁻¹) gained weight relative to the control on days 7 and 14. Significant reductions on day 7 were observed for glucose and malic acid (consistent with a reduction in gluconeogenesis), and for palmitic and margaric acid (consistent with increased oxidation and reduced synthesis of fatty acids). Lactic acid ranked first and second among canonicals 1 and 2 respectively and led to significant differences in discriminant scores across concentration and time. Metabolite levels increased to equal or greater than the control on day 14, likely caused by reduced exposure as metformin is reported to be readily transformed by microorganisms under aerobic conditions. The observations were consistent with the known effects of metformin in humans, and suggests that a similar mode of action exists in earthworms.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100331"},"PeriodicalIF":6.0,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000325/pdfft?md5=ee6eeaad417426479f0715860d5ce296&pid=1-s2.0-S2405665024000325-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140273748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Temporal variability and sources of PFAS in the Rio Grande, New Mexico through an arid urban area using multiple tracers and high-frequency sampling","authors":"Kimberly R. Beisner ,&nbsp;Rebecca E. Travis ,&nbsp;David A. Alvarez ,&nbsp;Larry B. Barber ,&nbsp;Jacob A. Fleck ,&nbsp;Jeramy R. Jasmann","doi":"10.1016/j.emcon.2024.100314","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100314","url":null,"abstract":"<div><p>Per- and polyfluoroalkyl substances (PFAS) are ubiquitous in the environment but sources are not well defined for temporal and spatial aspects within an urban environment, and especially for an arid urban environment subject to seasonal short term high-intensity precipitation events. A focused diel sampling was conducted in the summer of 2021 to assess the temporal and spatial variability of PFAS in the Rio Grande near Albuquerque, New Mexico and showed an order of magnitude increase of PFAS as it flows through the Albuquerque urban area. Discrete samples were collected at two different locations on the Rio Grande in addition to wastewater treatment plant (WWTP) effluent that discharges directly to the Rio Grande between the sampling locations. Short-term high-intensity precipitation events occurred during the study period and mobilized PFAS from urban runoff. Dissolved organic matter composed of tryptophan-like organic substances and refined fuel and fuel byproducts, characteristic of an urban signature, were also related to the precipitation events. The PFAS in discharge from the WWTP was consistent over a 24-h period with slight differences in some compounds. Wastewater presence on the Rio Grande downstream of the WWTP was evidenced by a gadolinium anomaly as well as increases in several other trace elements, total dissolved nitrogen, and fluorescence indicators, in addition to PFAS. PFAS varied depending on source contribution, where urban runoff was associated with PFOA, PFOS, and PFBA, whereas PFHxA and PFPeA were associated with wastewater effluent. In addition, passive polar organic chemical integrative samplers (POCIS) using hydrophilic-lipid balance (HLB) sorption media were deployed for a month at two locations on the Rio Grande to assess longer term PFAS concentrations. The POCIS results show some compounds (PFPeA and PFHpA) were greater than the average concentration from discrete samples, whereas other compounds (PFHxA, PFOA, PFDA, and PFNA) were lower in the POCIS, and PFOS was very similar between the two. The POCIS did not detect PFBA, which may be related to the HLB media not performing well for short chain PFAS compounds. The results show promise for integrative samplers utilizing sorbent media. More detailed investigation of the spatial and temporal variability of water chemistry on the Rio Grande as it flows through Albuquerque could provide information applicable to urban areas worldwide.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100314"},"PeriodicalIF":6.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000155/pdfft?md5=b1623199fd55abefc96be24403bbdab9&pid=1-s2.0-S2405665024000155-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140135021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Basin-scale exposure risk of psychiatric pharmaceuticals and illicit drugs in tap water in Eastern China","authors":"Wei Wang ,&nbsp;Zeyuan Wang ,&nbsp;Feng Chen ,&nbsp;Fangxing Yang","doi":"10.1016/j.emcon.2024.100330","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100330","url":null,"abstract":"<div><p>A total of twenty-three psychiatric pharmaceuticals and illicit drugs were analyzed in tap water covering seven basins in Eastern China. The residual concentrations of these substances were detected up to 22.4 ng L^-1. Among the substances, benzodiazepines were more often detected with higher median concentrations than those of illicit drugs. Generally, the higher residual levels of psychoactive substances were detected in the upstream of the basins compared with the downstream. For example, the concentrations of diazepam, temazepam, and oxazepam in the downstream were much higher than those in the upstream in OJ. Among the basins, YH was the most polluted region. Exposure assessment indicated the median exposure doses of diazepam and temazepam were from 85 to 99 and 3.5–4.1 pg kg^-1 bw d^-1 in the basins, respectively. Benchmark quotient for the nine detected substances was calculated in each basin with the range from 0.0001 to 0.0389, indicating low risk in the tap water for human health under current concentrations.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100330"},"PeriodicalIF":6.0,"publicationDate":"2024-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000313/pdfft?md5=526d5b7d62fbb3b5ef90517fd5d2d4e9&pid=1-s2.0-S2405665024000313-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140122220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Biosynthesized CS-MgO/zeolite hybrid material: An efficient adsorbent for chlorpyrifos removal - Kinetic studies and response surface methodology","authors":"Mohammed T.M.H. Hamad,&nbsp;Belal N.A. Mahran","doi":"10.1016/j.emcon.2024.100324","DOIUrl":"10.1016/j.emcon.2024.100324","url":null,"abstract":"<div><p>The prevalence of organophosphate pesticides in aquatic environments raises severe concerns on a global scale. Chlorpyrifos, an insecticide, is included in a class of organophosphate pesticides. It is widely used on agricultural lands to control pests in cotton, fruit, and vegetables. The acute toxicity of chlorpyrifos is still dangerous to all aquatic living organisms. Then the treatment of water contaminated with chlorpyrifos is an important aspect. The recent decade has witnessed adsorption technology emerging as an advanced organophosphate pesticide wastewater treatment with great potential and a grand blueprint, in which the specific surface area and active sites of the adsorbent are considered to be the two most important characteristics largely impacting the adsorption performance. In this study, a CS-MgO/Zeolite composite was prepared by the microbial method as an effective adsorbent for the removal of chlorpyrifos from an aqueous solution. The adsorbent's properties were carefully characterized using X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy. The refinement of experimental conditions, encompassing variations in adsorbent dosage, contact time, and chlorpyrifos concentration at five discrete levels, was systematically undertaken through the utilization of a composite central design rooted in response surface methodology. The solution pH played a key role in chlorpyrifos removal, and a pH of 7.0 was selected according to its high adsorption ability. The highest removal (80.9%) of chlorpyrifos by CS-MgO/Zeolite was obtained at an optimum pH of 7, a contact time of 40 min, an adsorbent dosage of 0.4 g/L, and a chlorpyrifos concentration of 5 mg/L⁻¹. The adsorption results were highly fitted with the Freundlich adsorption isotherm model, and the maximum adsorption was 83.3 mg/g. Kinetic studies indicate that the removal of chlorpyrifos followed the pseudo-second-order model of adsorption (0.994). The thermodynamic parameters indicate the spontaneous and endothermic nature of chlorpyrifos sorption on CS-MgO/Zeolite sorbent. The results revealed that introducing chitosan could improve the adsorption capacity and rate effectively even though it sacrificed part of the specific surface areas of the MgO/Zeolite, indicating that active sites might play a dominant role during chlorpyrifos adsorption. The fabricated CS-MgO/Zeolite adsorbent nanocomposite displayed high reusability based on the elution and simultaneous regeneration ability. Therefore, as a cheap green nanocomposite adsorbent with high adsorption performance for chlorpyrifos, the CS-MgO/Zeolite nanocomposite adsorbent is expected to become one of the best candidate materials for chlorpyrifos removal aqueous solutions.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100324"},"PeriodicalIF":6.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000258/pdfft?md5=2aaa5a1071b1eeb28a68a8f22dabc390&pid=1-s2.0-S2405665024000258-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140084967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Green batch prepared a novel C/P co-doping urchin-like TiO2 for enhanced photocatalytic degradation and mineralization of trimethoprim","authors":"Weiwei Yang ,&nbsp;Qingwei Bu ,&nbsp;Ruiqing Zhao ,&nbsp;Haitao Huang ,&nbsp;Weijia Xu ,&nbsp;Nan Jia ,&nbsp;Qianhui Shi ,&nbsp;Lei Yang ,&nbsp;Jianfeng Tang ,&nbsp;Gang Yu","doi":"10.1016/j.emcon.2024.100329","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100329","url":null,"abstract":"<div><p>In advancing the practical application of photocatalytic degradation for pollutant removal, batch preparation of environmentally friendly photocatalysts plays a crucial role. Herein, we prepared C/P co-doped urchin-like TiO₂ (C/P–TiO₂) through a straightforward room temperature impregnation and atmospheric annealing process. Phytic acid served as the dopant precursor for introducing C and P onto the TiO₂ surface. This doping process was verified through energy dispersive X-ray spectroscopy (EDX), electron spin resonance (ESR), and X-ray photoelectron spectroscopy (XPS) analysis. The C/P–TiO₂ photocatalyst exhibited exceptional efficiency in degrading the target compound trimethoprim (TMP), achieving a degradation of 98% TMP within 60 min and a mineralization of 40% TMP within 120 min, which were respectively 2.4 and 1.6 times higher than that of pristine TiO₂. The intermediate products of TMP were detected, and a plausible degradation pathway was proposed. Photoelectric characterization results also confirmed that C/P co-doping could effectively enhance the carrier separation efficiency of C/P–TiO₂. The catalysts prepared using the scaled-up impregnation system and reusing the phytic acid solution consistently demonstrated stable catalytic performance, which confirmed the viability of the method for green and batch preparation of C/P co-doped TiO₂. Notably, the obtained catalyst consistently exhibited high degradation efficacy in various real water bodies, highlighting its substantial potential for practical application. The green and batch preparation method of C/P–TiO₂ introduces a novel approach to the practical application of photocatalysis technology in treatment of water contaminants.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100329"},"PeriodicalIF":6.0,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000301/pdfft?md5=b3b4cd7481747adb5c463fd8abeb2ce5&pid=1-s2.0-S2405665024000301-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140052643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Characterizing occurrence of emerging organic contaminants in Dinaric karst catchment of Jadro and Žrnovnica springs, Croatia","authors":"Ana Selak,&nbsp;Jasmina Lukač Reberski,&nbsp;Ivana Boljat,&nbsp;Josip Terzić","doi":"10.1016/j.emcon.2024.100327","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100327","url":null,"abstract":"<div><p>The occurrence of emerging organic contaminants (EOCs) was investigated in vulnerable Dinaric karst catchment of Jadro and Žrnovnica springs in Croatia, under varying flow conditions and across three different water resource types (groundwater, springs, and surface water). The maximal EOCs concentration in both springs were observed following autumn recharge events, while during peak discharge no detection above the limits of detection (LOD) was recorded due to dilution process. Contrarily to springs, groundwater from deep borehole exhibited highest total EOCs concentration under low flow conditions, underscoring the considerable karst aquifer vulnerability and its oligotrophic nature. The peak EOCs concentration in karstic Cetina River coincided with the river's lowest discharge. The highest mass flux of 1013 g/day was determined for very mobile pharmaceutical metformin detected in Cetina. The presence of potentially persistent to very persistent compounds, like DEET and 1H-benzotriazole, which exhibited highest detection frequencies across all sampling sites, was observed in association with varying hydrological conditions. Hypotheses regarding the occurrence of identified EOCs include surface contamination infiltrating directly through ponors and highly karstified areas, potential persistence in the epikarst and aquifer matrix, and site-specific contamination sources for compounds such as 1H-benzotriazole, gabapentin, and ketoprofen found in groundwater. To evaluate the risk of inadvertent human exposure to EOCs across various age groups, we utilized measured spring concentrations and calculated drinking water equivalent levels (DWEL), which ranged from 1.4 μg/L for cotinine to 503 mg/L for sucralose, both detected in Jadro spring. Although EOCs concentrations in ng/L are unlikely to pose a significant risk to healthy population, long-term exposure to EOCs mixture remains unknown. Given scarcity of research on EOCs in karst environments on both global and national levels, our study enhances comprehension of their occurrence and behaviour across different karst water resources that hold crucial importance for drinking water supply in regions like Dinarides.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100327"},"PeriodicalIF":6.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000283/pdfft?md5=843315f3fc76bc796e6851fed0b7f9ec&pid=1-s2.0-S2405665024000283-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140042332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Photocatalytic degradation of enrofloxacin with CoAl-LDH mediated persulfate system: Efficiency evaluations and reaction pathways","authors":"Yuxuan Zhang ,&nbsp;Kai He ,&nbsp;Long Chen ,&nbsp;Wen Liu ,&nbsp;Jinlong Yuan ,&nbsp;Yaotong Gao ,&nbsp;Yuanfeng Qi ,&nbsp;Bingjun Liu","doi":"10.1016/j.emcon.2024.100328","DOIUrl":"10.1016/j.emcon.2024.100328","url":null,"abstract":"<div><p>Residual enrofloxacin (ENR) exposed in aqueous environments is challenging to the ecosphere. In this work, a layered double hydroxide CoAl-LDH was used to activate the common oxidizing agent persulfate (PS) for photodegradation of ENR, and the degradation pathways of ENR were scrutinized and elucidated. The results indicated that, under the optimal conditions obtained through orthogonal experiments, even though the degradation rate of ENR was as high as 97.72%, the removal of total organic carbon (TOC) from the system was only about 30%. Eleven probable reaction pathways were categorized, and thirty-one types of intermediates were identified in participating in the complex degradation process. The major products of ENR were P4 (C₁₇H₂₀FN₃O₃), P22 (C₁₉H₂₂FN₃O₄), P19 (C₁₇H₁₈FN₃O₃), which are mainly derived from the cleavage of the piperazine groups and quinolone rings. Density functional theory (DFT) calculations of the Fukui index for ENR revealed that the two N atoms in the piperazine ring were the core reactive sites in triggering the degradation chains, which were sensitive for electrophilic attack by the dominant radicals (•OH and SO₄•^-) generated from the composite PS-UV-CoAl-LDH system.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100328"},"PeriodicalIF":6.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000295/pdfft?md5=8fa2cd5e25afae41cb212c593de4977e&pid=1-s2.0-S2405665024000295-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140082950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Removal of As(V) in the presence of Cr(VI) in contaminated water from the Bajio region of Mexico using ferrihydrite-functionalized graphene oxide (GOFH): A case study","authors":"D.R. Joya-Cárdenas ,&nbsp;J.P. Rodríguez-Caicedo ,&nbsp;M.A. Corona-Rivera ,&nbsp;N. Saldaña-Robles ,&nbsp;C.E. Damián-Ascencio ,&nbsp;A. Saldaña-Robles","doi":"10.1016/j.emcon.2024.100312","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100312","url":null,"abstract":"<div><p>The presence of heavy metals such as arsenic (As) and chromium (Cr) can be considered one of the most toxic heavy metals. This study aims to develop and evaluate a graphene oxide (GO) based material functionalized with ferrihydrite for the removal of As(V) in the presence of Cr(VI). The adsorbent ferrihydrite-functionalized graphene oxide (GOFH) was characterized by SEM, FTIR, XRD, XPS, surface charge, BET and TGA. Individual adsorption capacities for As(V) and Cr(VI) were 160 and 66 mg g⁻¹ respectively at pH 4 and 298 K, fitting the Langmuir model. In binary systems, GOFH adsorbed As(V) with an adsorption capacity of 137 mg g⁻¹ in the presence of 20 mg L⁻¹ Cr(VI) at room temperature. Thermodynamic analysis revealed an exothermic and spontaneous process. Additionally, GOFH effectively removed several coexisting anions from groundwater, including SO₄²⁻, CO₃²⁻ and Cl⁻. This work evidences the potential of GOFH for competitive adsorption of priority pollutants from complex matrices. The GOFH material represents a technically and economically viable technology for application in groundwater decontamination, as it requires inexpensive precursors and ambient conditions during synthesis and operation.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100312"},"PeriodicalIF":6.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405665024000131/pdfft?md5=9e15bb2a474655e882734193f4e2de57&pid=1-s2.0-S2405665024000131-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140014507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Microplastics and heavy metals in freshwater fish species in the southwestern region of Bangladesh: An emerging concern for public health","authors":"Mst Shamima Akter ,&nbsp;Tapos Kumar Chakraborty ,&nbsp;Gopal Chandra Ghosh ,&nbsp;Md Simoon Nice ,&nbsp;Samina Zaman ,&nbsp;Abu Shamim Khan","doi":"10.1016/j.emcon.2024.100325","DOIUrl":"https://doi.org/10.1016/j.emcon.2024.100325","url":null,"abstract":"<div><p>Microplastics (MPs) pollution and its associated toxicity raising concerns among scientists as a result of their toxicological impacts on human health and the ecosystem. This study aims to investigate the microplastics and heavy metals (HMs) contamination in seventeen freshwater fish species collected from the Southwestern region of Bangladesh. Microplastics extracted from these species using the hydrogen peroxide digestion method and characterized by Attenuated Total Reflection- Fourier Transform Infrared Spectroscopy (ATR-FTIR). Atomic Absorption Spectrometry (AAS) was used to determine the concentration of HMs in different species for evaluating human health risks. A total of 142 microplastic particles were extracted with an average concentration of 1.13 ± 0.84 items per individual of fish, where the highest microplastics were found in <em>C. punctata</em> (3.43 ± 3.15 items) and lowest in <em>A. mola</em> (0.14 ± 0.38 items). Identified microplastics were dominated by &lt; 1 mm size (87.3%), black color (60.6%), and fiber shape (94.4%). Polyethylene (73.08%), polypropylene (21.15%), and polystyrene (5.77%) were the most prevalent among the identified microplastic polymers. A positive correlation was found between microplastic numbers and fish weight and length. Low to moderate human health risks were associated with microplastics. The concentration (mg/kg) of heavy metals in studied fish samples was Cr (0.47–2.89; 0.79 ± 0.56) &gt; Cu (0.01–1.14; 0.50 ± 0.44) &gt; Pb (0.04–0.58; 0.22 ± 0.12) &gt; Cd (0.00–0.11; 0.03 ± 0.03), respectively. Heavy metals-based human health risk assessment results show that there are no major non-carcinogenic health risks (THI&lt;1), while higher carcinogenic risks are present for consumers.</p></div>","PeriodicalId":11539,"journal":{"name":"Emerging Contaminants","volume":"10 3","pages":"Article 100325"},"PeriodicalIF":6.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S240566502400026X/pdfft?md5=db826ccd5af71021af7c6bfac30d0a5e&pid=1-s2.0-S240566502400026X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140014508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}