环境•农林最新文献

{"title":"Remediation of Heavy Metal-Contaminated Soils in Alpine and Arid Mining Regions: Synthesis and Performance of a Multifunctional Amendment","authors":"Jie Zhou,&nbsp;Peicong Zhang,&nbsp;Jianhua Liu,&nbsp;Yi Huang,&nbsp;Jialin He,&nbsp;Jinshu Zhang,&nbsp;Yubin Li,&nbsp;Chengye Yang","doi":"10.1007/s11270-026-10039-9","DOIUrl":"10.1007/s11270-026-10039-9","url":null,"abstract":"<div><p>Heavy metal (HM) contamination, freeze–thaw (F-T) cycling, and dry, nutrient-poor conditions jointly degrade the soils of lead–zinc mining areas on the Qinghai–Tibet Plateau (QTP) and severely inhibit plant growth. To address these problems, a multifunctional inorganic–organic composite amendment was developed from locally sourced solid wastes. The composite amendment prepared at the optimal mass ratio of diatomite, biochar, gypsum, magnesium hydroxide, and soil (5:6:1:1.45:103, designated as EK) significantly improved soil physicochemical properties: water saturation increased by 14.71%, whereas daily evaporation decreased by 23.33%. In addition, the cation exchange capacity (CEC), phosphorus retention, and potassium retention increased by 44.88%, 20.34%, and 100.70%, respectively. Under F-T conditions, the modified soil showed a two- to three-fold improvement in both adsorption capacity (Q_e) and removal efficiency (R) for different HMs in single- and multi-metal systems when compared to the control (CK). The removal efficiency of Pb²⁺ was especially high, at over 80%. Isotherm analysis showed that the experimental adsorption data for Pb²⁺ and Zn²⁺ were well described by the Freundlich isotherm model, suggesting that the adsorption mainly occurred on energetically heterogeneous surfaces. The kinetic studies showed that the adsorption of Pb²⁺ followed the pseudo-second-order model, while that of ions with smaller ionic radii (Zn²⁺, Cu²⁺, Cd²⁺) was better fitted by the pseudo-first-order model. The effect of EK on plant growth was further investigated in a pot experiment with rye. EK improved rye growth even under the combined stresses of F–T cycling and HM contamination, demonstrating its application potential for soil remediation in lead–zinc mining areas of the QTP.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189048","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":"The influence of ergosterol on termites’ defenses against Metarhizium infections","authors":"Jacob H. Rosenbloom,&nbsp;Bhawana Luitel,&nbsp;Mark S. Bulmer","doi":"10.1007/s00114-026-02183-3","DOIUrl":"10.1007/s00114-026-02183-3","url":null,"abstract":"<div><p>Termites respond to spores of pathogenic fungi that have adhered to the cuticle with brief bouts of rapid shaking, an alarm response that promotes allogrooming, which helps prevent fatal infections. The pathogen associated molecular pattern (PAMP) that elicits this proactive hygienic response is unknown. Ergosterol, an important component of the fungal cell membrane, has been identified as a potential PAMP in the subterranean termite <i>Coptotermes formosansus</i>. In this study, commercial or extracted ergosterol elicited a hygienic behavioral response in workers of the subterranean termite <i>Reticulitermes flavipes</i>. The ergosterol content of pathogenic spores of <i>Metarhizium</i> spp. were also found to vary among different strains and species of the fungus. However, there was a significant positive correlation between ergosterol content of different <i>Metarhizium</i> isolates and fatal infections caused by their spores (conidia). Alarm responses from challenges with conidia were not positively correlated with estimates of ergosterol content and instead were negatively correlated with ergosterol content although not significantly, which does not support the hypothesis that ergosterol is a critical recognition cue for the hygienic response. Termicin, an antifungal peptide in termite salivary secretions, was also most effective against the most lethal isolates, which had the highest ergosterol content. Ergosterol appears to influence spore membrane vulnerability to disruption by the antifungal peptide. Overall, our results indicate ergosterol influences both the vulnerability of <i>Metarhizium</i> conidia to termicin and the detection of an unidentified PAMP, which alerts termites to fungal contamination. This sets up a potential trade-off for the fungus between a shield for protection and signal for detection: reducing vulnerability to termicin by decreasing the content of cell membrane ergosterol results in an increase in a cell wall PAMP that termites can recognize and respond to with allogrooming. <i>Reticulitermes</i> spp. appear to have adaptively exploited this trade-off.</p></div>","PeriodicalId":794,"journal":{"name":"The Science of Nature","volume":"113 6","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13658296/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149164003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative Bio-sorption of Pb2+ and Cu2+ from Wastewater Samples using Cannabis sativa L. Buds: Kinetics, Isotherm and Re-usability Studies","authors":"Thandeka Mbatha,&nbsp;Precious Mahlambi,&nbsp;Sandisiwe Zondo","doi":"10.1007/s11270-026-10040-2","DOIUrl":"10.1007/s11270-026-10040-2","url":null,"abstract":"&lt;div&gt;&lt;p&gt;Heavy metal pollution, mainly from industrial wastewater, is an ongoing worldwide concern that threatens water quality. The present study investigated the potential of &lt;i&gt;Cannabis sativa&lt;/i&gt; L&lt;i&gt;.&lt;/i&gt; buds, both raw and chemically modified with glycine and sodium bicarbonate, to decontaminate Lead (Pb&lt;sup&gt;2+&lt;/sup&gt;) and Copper (Cu&lt;sup&gt;2+&lt;/sup&gt;) ions from wastewater. Fourier transform Infrared spectroscopy results showed that the chemical modification process altered the surface functional groups, as evidenced by shifts in the functional group peak intensities of the modified bio-adsorbents compared to those of the unmodified bio-adsorbent before adsorption. After the adsorption process, a reduction in peak intensities was observed due to adsorption interactions with metal ions. Scanning electron microscopy revealed an irregular and multi-layered surface with interconnected pore network structures of all assessed bio-adsorbents. However, sodium bicarbonate modified cannabis appeared to be more porous than both bio-adsorbents. Energy-dispersive X-ray spectroscopy identified carbon and oxygen as the major elemental components of the bio-adsorbents. X-ray diffraction spectroscopy revealed that the sodium bicarbonate modified bio-adsorbent exhibited a more crystalline form, while thermogravimetric analysis showed that it was more stable than glycine and raw cannabis biomaterial. These findings indicate that bio-adsorbents exhibit an enhanced adsorption capacity, whilst sodium bicarbonate modified cannabis is expected to perform better than the other bio-adsorbents. A batch adsorption method was employed and assessed by varying solution pH, temperature, mass dosage, initial metal concentration, and contact time in a binary system. The optimal adsorption conditions were determined to be a solution pH of 7, reaction time of 10 min, mass dosage of 10 mg, an initial adsorbate concentration of 10 mg/L, and an adsorption temperature of 25 ºC. According to the analysis of variance results, the effects of temperature and adsorbate concentration on the adsorption of metal ions showed the highest (&gt; 61%) and lowest (&gt; 3%) percentage contributions. The adsorption rates of Cu&lt;sup&gt;2+&lt;/sup&gt; and Pb&lt;sup&gt;2+&lt;/sup&gt; ions fitted a non-linear pseudo-first-order model, and the sorption mechanism was best described by a multilayered surface (the Freundlich isotherm). The metal ion adsorption process was found to be exothermic, spontaneous, and feasible. Sodium bicarbonate modified cannabis showed a larger maximum adsorption capacity (q&lt;sub&gt;max&lt;/sub&gt;) (31.222–56.875 mg/g) than glycine modified cannabis (28.983–53.888 mg/g) and raw cannabis (26.151–30.527 mg/g) for Cu&lt;sup&gt;2+&lt;/sup&gt; and Pb&lt;sup&gt;2+&lt;/sup&gt; ions, respectively. The percentage removal efficiency in real wastewater samples was 74–88% for the raw bio-adsorbent, 80–100% for glycine, and 96–100% for the sodium bicarbonate-modified bio-adsorbent for Cu&lt;sup&gt;2+&lt;/sup&gt; and Pb&lt;sup&gt;2+&lt;/sup&gt; ions, respectively. Though ","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-026-10040-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149188973","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":"Performance Assessment of fast Sand Filter for Water Pollution Removal: Head Loss Consideration","authors":"Chaouche Meriem,&nbsp;Hachemi Abdelkader,&nbsp;Chebbi Meriem,&nbsp;Zeroual Ayoub","doi":"10.1007/s11270-026-10070-w","DOIUrl":"10.1007/s11270-026-10070-w","url":null,"abstract":"<div><p>This study provides a short-term pilot-scale assessment of a rapid sand filter using locally available sand as a tertiary treatment process to improve the quality of treated wastewater in response to the limited implementation of advanced tertiary treatment systems in many wastewater treatment plants, particularly in water-stressed regions such as Algeria. The objective is to reduce water pollution to the recommended standard limits for potential reuse in agriculture and industrial processes, using a simple, low-cost, and locally available filter medium. Particular attention is also given to the critical role of filter media characteristics in filtration efficiency. Through granular analysis of particle size distribution, the effective diameter of the sand was 0.5 mm. The filter performance and removal efficiency of water quality parameters were evaluated using secondary treated wastewater collected from the wastewater treatment plant (WWTP) of Beni Merad. The initial physical and chemical characteristics of the wastewater were: total suspended solids (TSS) 132 mg/L, turbidity 10.2 NTU, chemical oxygen demand (COD) 128 mg O₂/L, and biochemical oxygen demand (BOD_<b>5</b>) 95 mg O₂/L. The sand filter column was operated for six days, corresponding to 22 cumulative operating hours, at a constant filtration rate of 36 L.h-1, corresponding to a filtration velocity of 4.58 m·h⁻¹. Treatment performance was evaluated through the removal of TSS, turbidity, COD, and BOD_<b>5</b>, with filter achieved maximum removal efficiencies of 88.89%, 78.57%, 61.5%, and 47.83%, respectively. These findings show that local sand filtration can significantly improve the physicochemical quality of secondary treated wastewater, especially by reducing suspended solids, turbidity, and organic pollution. Hydraulic performance was monitored by continuously measuring head loss along the filter column. After 16 h of operation, head loss reached its maximum value of 0.61 m, indicating substantial hydraulic resistance and the onset of a backwashing requirement under the operating conditions used in this study and the filter was restarted for an additional 6 h. The main mechanisms governing sand filtration were sedimentation, mechanical trapping, particle accumulation within the filter bed, and adsorption onto sand grains. Overall, the results demonstrate the initial treatment and hydraulic response of the tested sand medium under real secondary wastewater conditions. local sand proved to be an effective, low-cost, and technically simple filter medium for tertiary wastewater treatment in short-term pilot-scale applications.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189093","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":"Ce-regulated FeMnOx/ATP Catalysts for Efficient and H2O/SO2-resistant Low-temperature NH3-SCR","authors":"Zhifang Zhou,&nbsp;Jiali Song,&nbsp;Lan Li,&nbsp;Fang Dong,&nbsp;Zhicheng Tang","doi":"10.1007/s11270-026-10007-3","DOIUrl":"10.1007/s11270-026-10007-3","url":null,"abstract":"<div><p>Nitrogen oxides (NO_x) are major atmospheric pollutants, driving the development of low-cost and poisoning-resistant catalysts for efficient low-temperature NH₃-selective catalytic reduction (NH₃-SCR). Herein, Ce-modified Ce_y-FeMnO_x/ATP catalysts (y = 5, 7.5, 10 and 12.5%) were synthesized using attapulgite as the support. Among them, Ce₁₀-FeMnO_x/ATP exhibited the best performance, achieving over 90% NO conversion at 220–320 °C with activity losses below 15% under H₂O or SO₂ poisoning. Comprehensive characterizations revealed that appropriate Ce incorporation improved active-phase dispersion, optimized the surface redox environment and acid-strength distribution and promoted NH₃ adsorption and activation. The enhanced NH₃-SCR performance originated from the synergistic regulation of redox behavior, surface oxygen species, surface acidity and structural characteristics rather than from a single surface property. This work demonstrates an effective strategy for developing efficient and low-cost ATP-supported FeMn-based NH₃-SCR catalysts.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189343","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":"Correction to: Temporal Dynamics, Ecotoxicological Hazard Characterization, and Human Cancer Risk Assessment of Polycyclic Aromatic Hydrocarbons in Crude Oil‑Contaminated Tropical Soils under Biochar Amendment and Bacterial Bioremediation","authors":"Festus Olugbenga Adelana","doi":"10.1007/s11270-026-10053-x","DOIUrl":"10.1007/s11270-026-10053-x","url":null,"abstract":"","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132562","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":"First Detection of Candidozyma (Candida) auris in Wastewater in Türkiye: Evidence for Environmental Circulation under a One-Health Framework","authors":"Sidre Erganis,&nbsp;Ahmet Gulluk,&nbsp;Emre Keskin,&nbsp;Elif Ayca Sahin,&nbsp;Hilal Basak Erol,&nbsp;Banu Kaskatepe,&nbsp;Dolunay Gulmez,&nbsp;Sevtap Arikan Akdagli,&nbsp;Gulce Edis,&nbsp;Isilay Celik,&nbsp;Cagri Ergin,&nbsp;Nalan Oya San Keskin,&nbsp;Arzu Gursoy Ergen,&nbsp;Hakan Yardimci,&nbsp;Nuket Sivri,&nbsp;Gulsen Altug,&nbsp;Ozlem Guzel Tunccan,&nbsp;Ayse Kalkanci","doi":"10.1007/s11270-026-10043-z","DOIUrl":"10.1007/s11270-026-10043-z","url":null,"abstract":"<div><p><i>Candidozyma (Candida) auris</i> is an emerging multidrug-resistant fungal pathogen with expanding ecological presence beyond healthcare settings. Wastewater-based surveillance (WBS) has recently become an important tool for early detection of community-level circulation. However, no environmental monitoring data have previously been reported from Türkiye. This study aimed to investigate the presence of <i>C. auris</i> in hospital-associated wastewater and assess its potential role as an environmental reservoir. Between January and July 2025, 46 wastewater samples were collected twice weekly from the main outlet of a tertiary hospital. Samples underwent concentration, culture on selective chromogenic agar, and matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS) confirmation. DNA extracted from Sterivex filters was tested using the species-specific CauF/CauR qPCR assay. All runs included appropriate positive, negative, and no-template controls. The Bio-speedy <i>Candida auris</i> Clade Detection qPCR Kit (Bioeksen R&amp;D Technologies Inc., Türkiye) was used for clade identification of the isolates. Antifungal susceptibility testing of the recovered <i>C. auris</i> isolates was performed using the EUCAST reference microdilution method, and minimum inhibitory concentrations (MICs) were interpreted according to EUCAST guidelines. <i>C. auris</i> DNA was detected in three wastewater samples (Ct 31–36), and two culture-confirmed isolates were recovered and stored. The repeated qPCR positivity across different sampling dates suggests intermittent yet detectable shedding into the sewage system. Importantly, no outbreak was ongoing in the hospital, with only sporadic clinical cases reported, indicating that even low-level colonization may generate measurable environmental signatures. All isolates were evaluated as Clade-1. Antifungal susceptibility testing revealed high fluconazole MICs (&gt; 64 mg/L) in both <i>C. auris</i> isolates, consistent with no activity of fluconazole. In contrast, low MIC values for echinocandins (anidulafungin 0.06–0.25 mg/L; micafungin 0.125–0.25 mg/L) indicated favorable in vitro activity of this antifungal class against the tested isolates. This study provides the first culture-confirmed detection of <i>C. auris</i> in wastewater in a tertiary hospital in Türkiye, demonstrating organism persistence under local wastewater conditions. These findings highlight the value of WBS as an early-warning component of fungal surveillance and underscore the need to integrate environmental monitoring into One Health strategies for <i>C. auris</i>.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132638","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":"Unveiling the Ameliorative Potential of Organic Amendments on Microplastic-Induced Shifts in Soil Carbon and Microbiome","authors":"Lingkan Su,&nbsp;Hangying Su,&nbsp;Qian Wang,&nbsp;Bangping Deng,&nbsp;Yang Yu,&nbsp;Juanying Li","doi":"10.1007/s11270-026-10052-y","DOIUrl":"10.1007/s11270-026-10052-y","url":null,"abstract":"<div><p>This study investigated microplastic (MP) pollution characteristics in facility agriculture soils, compared the effects of fresh polyethylene (FPE) and aged polyethylene (APE) on soil organic carbon (SOC) fractions and microbial communities, and evaluated the regulatory role of organic amendments. The results demonstrated that MP abundance was significantly higher in facility agriculture soils than that in non-facility agriculture soils, primarily due to plastic film use. MP residues increased SOC (from 4.29 g/kg to 5.01–5.21 g/kg) and recalcitrant organic carbon (ROC, from 2.61 g/kg to 3.46–3.61 g/kg) but significantly inhibited active organic carbon (AOC, from 1.68 g/kg to 1.55–1.61 g/kg). FPE exerted a stronger effect on dissolved organic carbon (DOC), whereas APE showed greater ROC accumulation. Soil enzyme activities (β-glucosidase (BG) and cellobiohydrolase (CBH)) were also significantly inhibited. Microbial community analysis revealed that MP residues reduced bacteria and fungi α-diversity, suppressed <i>Acidobacteria</i> and <i>Basidiomycota</i>, and significantly altered microbial community structure, with effects more pronounced under APE than FPE. Organic amendments (rice straw and decomposed aquatic weed) increased SOC from 5.01–5.21 g/kg to 5.97–7.62 g/kg, raised ROC, AOC, DOC, and microbial biomass carbon (MBC), enhanced enzyme activities, and improved microbial richness and diversity, effectively mitigating the negative impacts of MP pollution. Rice straw showed greater potential for enhancing soil carbon sequestration, providing technical support for the sustainable development of facility agriculture.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132561","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":"RGO-modified MnFe₂O₄/BiOI Nanocomposite for Efficient Nitrate Removal: Kinetic, Isotherm, and Thermodynamic Analysis","authors":"Moslem Azghandi,&nbsp;Amir Mirshafiee,&nbsp;Norouz Mahmoudi,&nbsp;Mohammad Reza Miri","doi":"10.1007/s11270-026-10041-1","DOIUrl":"10.1007/s11270-026-10041-1","url":null,"abstract":"<div><p>This study aimed to synthesize a magnetic hybrid RGO/MnFe₂O₄/BiOI (RMB) adsorbent for nitrate removal from drinking water. The synthesized adsorbent was characterized using FTIR, XRD, FESEM, BET, and VSM analyses. In addition, the effects of key operational parameters, including pH, adsorbent dosage, contact time, initial nitrate concentration, and temperature, were systematically investigated. BET analysis revealed a high specific surface area of 88.77m²/g for the RMB composite, indicating its strong adsorption capability toward contaminants. The formation of functional groups associated with the constituent components of the hybrid composite was confirmed by the characteristic FTIR absorption peaks. Under optimal conditions, the maximum nitrate removal efficiency and adsorption capacity were 80.52% and 40.26mg/g, respectively, achieved at neutral pH, an adsorbent dosage of 2g/L, a contact time of 90 min, an initial nitrate concentration of 100mg/L, and a temperature of 20°C. Thermodynamic parameters indicated that nitrate adsorption onto the magnetic RMB adsorbent is spontaneous (ΔG⁰ &lt; 0), endothermic (ΔH⁰ &gt; 0), and is associated with an increase in randomness of the system (ΔS⁰ &gt; 0). Kinetic and isotherm studies demonstrated that the adsorption process follows a pseudo-second-order kinetic model (R² &gt; 0.99; qₑ = 44.44mg/g) and the Langmuir isotherm model (R² &gt; 0.99; qₘₐₓ = 40.98mg/g). These findings suggest that nitrate adsorption onto the RMB magnetic adsorbent occurs via a physical, monolayer mechanism. Furthermore, regeneration and reusability experiments over six successive cycles showed only an approximately 9.5% reduction in removal efficiency. Overall, the results indicate that the magnetic RGO/MnFe₂O₄/BiOI composite is a promising, stable, and cost-effective adsorbent for nitrate removal from drinking water, with significant potential for practical application in water and wastewater treatment systems.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132571","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":"Effects of Bioaugmentation with Phenanthrene-acclimated Soil at Different Ratios on Phenanthrene Biodegradation and Microbial Community Dynamics","authors":"Haiping Gu,&nbsp;Lihang Zhang,&nbsp;Jie Yan,&nbsp;Yizhen Jia,&nbsp;Yihan Sun,&nbsp;Ziheng Zhang,&nbsp;Yi Yang,&nbsp;Weizheng Ren,&nbsp;Lianfeng Shen,&nbsp;Yuhao Liu","doi":"10.1007/s11270-026-10029-x","DOIUrl":"10.1007/s11270-026-10029-x","url":null,"abstract":"<div><p>Bioaugmentation is a promising bioremediation approach for removing polycyclic aromatic hydrocarbons (PAHs) from contaminated environment. This study investigated the effects of adding 10% (F10), 30% (F30), and 50% (F50) phenanthrene (PHE)-acclimated soil on PHE biodegradation, soil enzyme activities, microbial community composition, and their interrelationships. The results showed that PHE degradation followed the first-order kinetic model. Higher proportions of acclimated soil accelerated PHE degradation and enhanced the activities of enzymes, including dehydrogenase, polyphenol oxidase, catalase, and fluorescein diacetate hydrolase, particularly during the early incubation stage. High-throughput sequencing analysis revealed that increasing bioaugmentation ratios decreased alpha diversity but increased the relative abundance of PAH-degrading bacteria. Notably, <i>Rhodococcus</i> and <i>Mycobacterium</i> were identified as key contributors to PHE degradation. Furthermore, analyses of alpha diversity, beta diversity, and functional predictions indicated that microbial community composition gradually recovered to its initial states after PHE degradation, with the F10 treatment showing the most pronounced recovery. These findings provide valuable theoretical support for developing efficient and ecologically sustainable bioremediation strategies for PAH-contaminated soils.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"237 23","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132651","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}