环境•农林最新文献

{"title":"Metagenomic Studies on Microbiomes Capable of Degrading the Decabromodiphenyl Ether in River Sediments","authors":"Yi-Yun Lao,&nbsp;Shu-Chi Chang","doi":"10.1007/s11270-025-07793-7","DOIUrl":"10.1007/s11270-025-07793-7","url":null,"abstract":"<div><p>Sediment contamination is a prevailing global environmental problem. Sediments in the lower sections of rivers are often contaminated by persistent organic pollutants (POPs). Among the POPs, polybrominated diphenyl ethers (PBDEs) raised deep concerns because of their multiple toxicities and endocrine-disrupting effects. Decabromodiphenyl ether (BDE-209) usually occupies more than 90% of the total PBDE concentration in sediments and is not easy to clean up. We have successfully developed the <i>in situ</i> phase inversion emulsification and biological reductive dehalogenation (ISPIE/BiRD) to remediate weathered polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) in river sediments. Still, it has yet to be applied to BDE-209-contaminated sediments. Thus, in this study, we tested ISPIE/BiRD’s applicability on the sediments contaminated by BDE-209 in batch and column experiments and analyzed their metagenomic profiles. In the batch experiment, the best-performing group, Group 3, removed 56.5% of BDE-209 in 70 days. In the column study, ISPIE removed 22% and 15% of BDE-209 in the weathered and fresh groups, respectively. In addition, the best performance group for subsequent BiRD removal is the natural recovery group of weathered BDE-209 (WNR), with a total removal of 56.0%. According to the DNA sequencing data, more species and higher diversity in the batch experiment tend to perform better. The predominant bacteria in the column experiment differed from those in the batch experiment but showed similar removal functions. <i>Rectinema cohabitans</i> is the only species positively correlated with the removals in batch and column studies. The results suggested that ISPIE/BiRD is feasible for the remediation of BDE-209-contaminated sediment.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475201","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":"Gaseous Elemental Mercury (GEM) in Ambient Air in Malaysia and its Health Risk Assessment","authors":"Mohd Shahrul Mohd Nadzir,&nbsp;Tan Mei Shin,&nbsp;Alvin Chua,&nbsp;Mohd Zaim Mohd Nor,&nbsp;Muhamad Ikram A. Wahab,&nbsp;Tay Kheng Soo,&nbsp;Mohd Aftar Abu Bakar,&nbsp;Noratiqah Mohd Ariff,&nbsp;Mohd Fadzil Firdzaus Mohd Nor","doi":"10.1007/s11270-025-07797-3","DOIUrl":"10.1007/s11270-025-07797-3","url":null,"abstract":"<div><p>Mercury (Hg) is a global pollutant that poses significant risks to human health and ecosystems. In its dominant atmospheric form, gaseous elemental mercury (GEM), it can travel long distances, contributing to widespread environmental contamination. This study investigates GEM levels in ambient air across urban, suburban, rural, and industrial areas in Peninsular Malaysia using both in situ and continuous measurement methods. Results show GEM concentrations ranging from a minimum of 4.8 to a maximum of 28.9 ng m⁻3, with the highest levels observed in industrial areas such as Pasir Gudang (28.9 ng m⁻3) and Shah Alam (18.6 ng m⁻3). Health risk assessments (HRA), conducted for different age groups, indicated that GEM concentrations were below the threshold for non-carcinogenic health risks (HQ &lt; 1). These findings highlight the urgent need for long-term monitoring to assess mercury pollution and inform Malaysia’s commitment to the Minamata Convention. The study underscores the importance of continuous GEM monitoring to bridge knowledge gaps in mercury’s spatial and temporal distribution, especially in tropical regions.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465955","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":"A quick and non-destructive approach to combat timber adulteration using attenuated total reflectance Fourier transform infrared spectroscopy and chemometrics","authors":"Arti Yadav,&nbsp;Chongtham Nimi,&nbsp;Manish Kapoor,&nbsp;Rajinder Singh","doi":"10.1007/s00114-025-01970-8","DOIUrl":"10.1007/s00114-025-01970-8","url":null,"abstract":"<div><p>Timber adulteration, illegal harvesting, and logging of legally protected timber species are a major threat to biodiversity. Identifying and differentiating low-value timber species from high-grade ones is a prerequisite to combat timber-related crimes. Timber adulteration can be detected by techniques such as DNA barcoding. However, these techniques have some drawbacks as they are time-consuming and destructive. To address all these issues, in this study, a quick and non-destructive approach has been used to detect timber adulteration by identifying and discriminating selective timber species using vibrational spectroscopy along chemometric methods such as principal component analysis (PCA), linear discriminant analysis (LDA), and partial least square discriminant analysis (PLS-DA) that successfully differentiated <i>Tectona grandis</i> (teak) from <i>Magnolia champaca</i> (champ) with 96.25% accuracy, <i>Swietenia macrophylla</i> (mahogany) from <i>Magnolia champaca</i> with 97.5% accuracy, and <i>Artocarpus heterophyllus</i> (Jack) from <i>Mangifera indica</i> (mango) with 100% PCA LDA training accuracies. Partial least square discriminant analysis successfully differentiated the timber species with 100% accuracy. ATR-FTIR spectroscopy and chemometric tools proved to be effective in detecting timber adulteration, which will help the investigating agencies combat timber-related crimes.</p></div>","PeriodicalId":794,"journal":{"name":"The Science of Nature","volume":"112 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Ti3C2Tx (MXene) on growth, oxidative stress, and metabolism of Microcystis aeruginosa","authors":"Qianqian Xiang, Zhihao Ju, Renhong Zhu, Minmin Niu, Yuanyuan Lin, Xuexiu Chang","doi":"10.1039/d4en01074d","DOIUrl":"https://doi.org/10.1039/d4en01074d","url":null,"abstract":"The potential ecotoxicity of Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> (MXene) is becoming a growing concern due to its widespread use in the field of environmental remediation. Unfortunately, little is known about the toxic effects and mechanisms of Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> on aquatic phytoplankton. Herein, we investigated the influence of Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> on the growth, oxidative stress, and metabolism of the phytoplankton <em>Microcystis aeruginosa</em> using conventional toxicological and metabolomics methods. Results showed that Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> had a dose-dependent effect on the physiological ecology of <em>M. aeruginosa</em>. Although low Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> concentrations (≤1 mg L<small>⁻¹</small>) did not significantly change the <em>M. aeruginosa</em> growth, oxidative status, and cell morphology, high concentrations (≥5 mg L<small>⁻¹</small>) substantially reduced its proliferation and photosynthetic capacity. The metabolomics results showed that low (1 mg L<small>⁻¹</small>) and high (5 mg L<small>⁻¹</small>) Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> concentrations induced the expression of 43 and 128 differential metabolites in <em>M. aeruginosa</em>, respectively, which were mainly enriched in the amino acid metabolism and lipid metabolism pathways. These results suggest that Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> resulted in metabolic disorders in <em>M. aeruginosa</em>, such as porphyrin and chlorophyll metabolism and glycerophospholipid metabolism, thereby inhibiting the photosynthetic activity of <em>M. aeruginosa</em> and ultimately leading to a decrease in algal growth. This study provides new insights into the toxicity mechanism of Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> against <em>M. aeruginosa</em>, which helps us understand the potential risks of Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> in the aquatic environment.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"15 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 effectiveness of pollinators and their foraging behavior on Neustanthus phaseoloides (Fabaceae)","authors":"Suman Paul,&nbsp;Tanushree Singha,&nbsp;Riya Roy,&nbsp;Osunam Tayeng,&nbsp;Engchong Sangdo,&nbsp;Prasenjit Debbarma,&nbsp;Bhushan B. Dholakia,&nbsp;Badal Kumar Datta","doi":"10.1007/s00114-025-01971-7","DOIUrl":"10.1007/s00114-025-01971-7","url":null,"abstract":"<div><p>Insect pollination is critical for the reproduction of crops and wild plants, yet the efficiency of pollinators varies widely across species. Hence, it is essential to study the visitation behavior and pollination effectiveness of the floral visitors. <i>Neustanthus phaseoloides</i> is an agro-ecologically and medicinally important plant occurring in Tripura, Northeast India. We selected it for the present investigation as its distinct floral morphology might impact the pollinator visitation behaviors and subsequent pollination success. A total of 12 insect foragers visited the flowers of <i>N. phaseoloides</i>. Among them, 10 generalist pollinators were observed depositing conspecific pollen along with some amount of heterospecific pollen grains on the stigma. Although the pollen deposition efficiency varied significantly among pollinator species, the bees were the most effective in pollen deposition and subsequent reproductive outputs. All pollinators contributed to the fruit and seed production at varying degrees, indicating their effectiveness in reproductive success. The mating system studies indicated that the species was self-compatible and dependent on pollinators for increased reproductive success. Furthermore, some degree of pollination deficit was detected in our study population, suggesting that the increased visitation of effective pollinators might enhance the reproductive outputs. Overall, this first report on the pollination effectiveness of <i>N. phaseoloides</i> will improve our understanding of the reproductive success in a medicinally useful wild plant.</p></div>","PeriodicalId":794,"journal":{"name":"The Science of Nature","volume":"112 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00114-025-01971-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446377","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":"Cr(III)-incorporated Fe(III) hydroxides for enhanced redox conversion of As(III) and Cr(VI) in acidic solution","authors":"Juanjuan Liu, Xubo Gao, Chong Dai, Suona Zhang, Shuqiong Kong, Lin Wang, Yandi Hu","doi":"10.1039/d4en01068j","DOIUrl":"https://doi.org/10.1039/d4en01068j","url":null,"abstract":"Impurity-containing iron hydroxides, abundant in many natural and engineered soil and aqueous environments, control the fate and transport of multiple aqueous contaminants. Fe(<small>III</small>) hydroxide was reported to simultaneously detoxicate As(<small>III</small>) and Cr(<small>VI</small>). However, the mechanisms and reaction intermediates are not clear, and the effects of impurities in ferrihydrite were far from being well understood. Here, Cr(<small>III</small>)-incorporated Fe(<small>III</small>) hydroxides were precipitated from acidic solutions (pH ∼ 3.0) with varied Fe(<small>III</small>)/Cr(<small>III</small>) molar ratios (10 : 0 to 8 : 2) for simultaneous removal of As(<small>III</small>) and Cr(<small>VI</small>). Multiple characterization techniques were combined to investigate the effects of Cr-incorporation on the size, band gap, adsorption, and catalytic efficiency of Fe hydroxides. With the amounts of Cr-incorporation increasing, the particle size of Fe hydroxides rapidly decreased (from 16.7 to 6.0 nm), and the removal of total As/Cr increased, as the Cr-incorporated Fe hydroxides with smaller size had larger surface area, promoting As/Cr removal by adsorption. Based on As/Cr speciation analysis of both aqueous and solid phases, the molar ratios of the oxidized As(<small>III</small>) (88%) to reduced Cr(<small>VI</small>) (∼56%) were calculated to be ∼1.5, indicating that the coupled redox conversion was the dominant removal mechanism over As(<small>III</small>)/Cr(<small>VI</small>) adsorption and As(<small>III</small>) oxidation. Intermediate characterization and molecular simulation found that Cr-incorporation promoted the early formation of H<small>₂</small>O<small>₂</small> and Cr(<small>V</small>) intermediates, and enhanced the adsorption of reaction intermediates on Cr-incorporated Fe hydroxides, thus promoting their catalytic efficiency for coupled As(<small>III</small>)/Cr(<small>VI</small>) redox reactions.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"29 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143452063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Photocatalytic Degradation of Polyethylene, Polypropylene, and Sulfathiazole Using a UV/TiO2/Oxidant System","authors":"Vikash Singh,&nbsp;Seon Yeong Park,&nbsp;Jun Ho Choi,&nbsp;Chang Gyun Kim","doi":"10.1007/s11270-025-07805-6","DOIUrl":"10.1007/s11270-025-07805-6","url":null,"abstract":"<div><p>Photocatalysis is widely acknowledged as an efficient technique for degrading a variety of pollutants, such as antibiotics, pesticides, herbicides, and microplastics. In this study, the micro-sized TiO₂ photocatalyst with the oxidizing agents (H₂O₂, periodate, and oxone) was investigated for the degradation of polyethylene (PE), polypropylene (PP), and sulfathiazole (STZ). Firstly, the photocatalytic activity of synthesized TiO₂ was evaluated by the decomposition of STZ (~ 94% within 30 min), and then the microplastic degradation experiments were conducted. The changes before and after the experiment were characterized using SEM, FTIR, and XPS. The weight loss for PE under the different combinations of experiments was UV (0%), UV/TiO₂ (∼5.7%), UV/TiO₂/H₂O₂ (∼17%), UV/TiO₂/Periodate (∼16%), and UV/TiO₂/Oxone (∼13.4%). The PP globules (~ 4 mm) did not have a significant impact on weight loss due to their large particle size and high rigidity. Meanwhile, PE showed improved weight loss due to a smaller particle size of ~ 20–100 µm. SEM images confirmed the degradation of the PE was significant while only a few surface modifications can be observed for PP. FTIR analysis revealed changes in carbonyl groups of PE and PP, including ketones (1720 cm⁻¹), acids (1718 cm⁻¹), esters (1735 cm⁻¹), and vinyl groups (1650 cm⁻¹). The synergy between the oxidants and the photocatalyst unquestionably enhanced the oxidation of the microplastics.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-025-07805-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446383","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":"A Comprehensive Investigation of Microplastic Contamination and Polymer Toxicity in Farmed Shrimps; L. vannamei and P. monodon","authors":"Yureshi Umanda Jayaweera,&nbsp;Hennayaka Mudiyanselage Amasha Induwari Hennayaka,&nbsp;Herath Mudiyanselage Lalinka Priyashan Bandara Herath,&nbsp;Gajanayake Mudalige Pradeep Kumara,&nbsp;Mahagama Gedara Yohan Lasantha Mahagamage,&nbsp;Undugodage Dulanjali Rodrigo,&nbsp;Danushika Charyangi Manatunga","doi":"10.1007/s11270-025-07800-x","DOIUrl":"10.1007/s11270-025-07800-x","url":null,"abstract":"<div><p>Microplastic (MP) pollution poses a significant threat to marine ecosystems, seafood safety, and human health. This study investigates the accumulation of microplastics in two commercially important shrimp species, <i>Litopenaeus vannamei</i> (<i>L. vannamei</i>) and <i>Penaeus monodon</i> (<i>P. monodon</i>), sourced from cluster farming sites in Puttalam, Sri Lanka. Shrimp exoskeletons and edible soft tissues underwent rigorous microplastic analysis, including density separation, alkali digestion, stereo microscopy, and Raman spectroscopy. The results revealed high microplastic contamination, with <i>L. vannamei</i> containing an average of 4.99 ± 1.81 MP particles/g and <i>P. monodon</i> containing 1.87 ± 0.55 MP particles/g. Microplastic sizes varied, with <i>L. vannamei</i> predominantly contaminated with 100–250 µm particles and <i>P. monodon</i> with 500 µm—1000 µm particles. Fiber morphotypes were prevalent in <i>L. vannamei</i>, while blue-colored microplastics were dominant in <i>P. monodon</i>. These comprised polystyrene (PS), nylon 6,6, and polyethylene (PE) which were identified by Raman spectroscopy. Additionally, the study investigated the acute toxicity effects of microplastic polymer combinations using a zebrafish embryo model (FET236 assay). Zebrafish embryos exposed to polyethylene-nylon 6,6 combinations exhibited significant adverse effects on hatching, survival, and heart function at lower concentrations, while polyethylene terephthalate-polystyrene combinations showed no considerable effects. These findings underscore the urgent need for monitoring and managing microplastic contamination in shrimp farming areas. Future research should focus on elucidating the ecological impacts and human health risks associated with microplastic exposure.</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":"236 3","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455406","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":"Integrating power, justice and reflexivity into transformative climate change adaptation","authors":"Marcus Taylor ,&nbsp;Siri Eriksen ,&nbsp;Katharine Vincent ,&nbsp;Morgan Scoville-Simonds ,&nbsp;Nick Brooks ,&nbsp;E. Lisa F. Schipper","doi":"10.1016/j.gloenvcha.2025.102981","DOIUrl":"10.1016/j.gloenvcha.2025.102981","url":null,"abstract":"<div><div>Transformative adaptation requires transformation among those who fund, plan, implement and evaluate interventions. In response, we emphasise the need for donor and implementing organisations to self-reform to create the necessary space and support for adaptation projects that embrace a transformative ethos. We argue that projects can appropriately centre justice as the primary goal of transformative adaptation by (1) confronting power relations, (2) embracing knowledge pluralism, (3) fostering bottom-up coalitions, and (4) recognizing trade-offs and unexpected outcomes. At the heart of this reflexive approach is the foregrounding of learning processes targeted towards shifting knowledge and power that is critical to avoid adaptive outcomes that exacerbate the vulnerability and exclusion of already marginalised groups.</div></div>","PeriodicalId":328,"journal":{"name":"Global Environmental Change","volume":"91 ","pages":"Article 102981"},"PeriodicalIF":8.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Recovery of Co(II), Ni(II) and Zn(II) using magnetic nanoparticles (MNPs) at circumneutral pH","authors":"Katie O'Neill, Jagannath Biswakarma, Richard Crane, James M. Byrne","doi":"10.1039/d4en01176g","DOIUrl":"https://doi.org/10.1039/d4en01176g","url":null,"abstract":"Growing demand for metals, particularly those with irreplaceable utility within renewable energy technology dictates an urgent demand for the development of new innovative approaches for their extraction from primary and secondary sources. In this study, magnetic nanoparticles (MNP) were investigated for their ability to remove cobalt (Co2+), nickel (Ni2+), and zinc (Zn2+) ions from neutral pH aqueous solutions under anoxic conditions. A MNP suspension (1 g L-1 or 5 g L-1) was exposed to varying concentrations of Co(II), Ni(II), and Zn(II) (50 – 1000 mg L-1) in both single and mixed systems for 48 hours at pH 7.0 ± 0.1. Results show that MNPs can remove these ions to low concentrations (Kd values: Zn: 0.07 L g-1; Co: 0.02 L g-1; and Ni: 0.01 L g-1 in single metal systems). Transmission Electron Microscopy (TEM) analysis confirmed relatively homogenous surface coverage of MNPs by each metal, while X-ray Absorption Spectroscopy (XAS) measurements determined sorption via the formation of coordinate bonds between the sorbed metals and surface oxygen atoms (Fe-O). Overall, our results show that MNPs can serve as an effective and reusable sorbent for Zn, Ni and Co ions from circumneutral pH waters.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"7 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143443766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}