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Plant litter is an important input source of carbon and nitrogen in soil. While microplastics (MPs) and plant litter are ubiquitously present in soil, their combined impact on soil biogeochemical processes remains poorly understood. To address this gap, we examined the soil changes resulting from the coexistence of plant litter (Alfalfa) and polyethylene microplastics (PE). The soil changes included physicochemical properties, composition of soil dissolved organic matter, and structure of the soil microbial community. The results showed that the addition of polyethylene (PE) inhibited the degradation of humus-like substances and decreased the quantity of humic acid-like compounds in soil dissolved organic matter (DOM). PE negatively impacted plant litter decomposition, disrupted soil organic carbon (SOC) breakdown, interfered with the nitrogen cycle, and significantly altered microbial community structures during the process. By day 35, SOC and total nitrogen (TN) levels were reduced by 39.8% and 10.1%, respectively, in the presence of PE. Furthermore, PE significantly decreased the abundance of nitrogen-fixing microbes, including Streptomyces (43.1%) and Bacillus (45.9%), which play key roles in nitrate reduction to ammonium. This study highlights the environmental effects of MPs on plant litter decomposition and their potential implications for soil biogeochemical processes. © 2024 Elsevier Ltd
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| GB/T 7714 | Liu, Wanxin , Wang, Yi , Gu, Chunbo et al. Polyethylene microplastics distinctly affect soil microbial community and carbon and nitrogen cycling during plant litter decomposition [J]. | Journal of Environmental Management , 2025 , 373 . |
| MLA | Liu, Wanxin et al. "Polyethylene microplastics distinctly affect soil microbial community and carbon and nitrogen cycling during plant litter decomposition" . | Journal of Environmental Management 373 (2025) . |
| APA | Liu, Wanxin , Wang, Yi , Gu, Chunbo , Wang, Jiao , Dai, Yexin , Maryam, Bushra et al. Polyethylene microplastics distinctly affect soil microbial community and carbon and nitrogen cycling during plant litter decomposition . | Journal of Environmental Management , 2025 , 373 . |
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Arsenic (As)-contaminated soil poses great health risk to human mostly through inadvertent oral exposure. We investigated CaAl-layered double hydroxide (CaAl-LDH), a promising immobilising agent, for the remediation of As-contaminated Chinese soils. The effects on specific soil properties and As fractionation were analyzed, and changes in the health risk of soil As were accurately assessed by means of advanced in vivo mice model and in vitro PBET-SHIME model. Results showed that the application of CaAl-LDH significantly increased soil pH and concentration of Fe and Al oxides, and effectively converted active As fractions into the most stable residual fraction, guaranteeing long-term remediation stability. Based on in vivo test, As relative bioavailability was significantly reduced by 37.75%. Based on in vitro test, As bioaccessibility in small intestinal and colon phases was significantly reduced by 25.65% and 28.57%, respectively. Furthermore, As metabolism (reduction and methylation) by the gut microbiota inhabiting colon was clearly observed. After immobilisation with CaAl-LDH, the concentration of bioaccessible As(V) in the colon fluid was significantly reduced by 61.91%, and organic As (least toxic MMA(V) and DMA(V)) became the main species, which further reduced the health risk of soil As. In summary, CaAl-LDH proved to be a feasible option for immobilisation remediation of As -contaminated soils, and considerable progress was made in relevant health risk assessment.
Keyword ：
Arsenic Arsenic CaAl-layered double hydroxide CaAl-layered double hydroxide Health risk Health risk Immobilisation Immobilisation Soil remediation Soil remediation
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| GB/T 7714 | Chen, Xiao-Chen , Huang, Zhen-Jia , Wang, Ao et al. Immobilisation remediation of arsenic-contaminated soils with promising CaAl-layered double hydroxide and bioavailability, bioaccessibility, and speciation-based health risk assessment [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 469 . |
| MLA | Chen, Xiao-Chen et al. "Immobilisation remediation of arsenic-contaminated soils with promising CaAl-layered double hydroxide and bioavailability, bioaccessibility, and speciation-based health risk assessment" . | JOURNAL OF HAZARDOUS MATERIALS 469 (2024) . |
| APA | Chen, Xiao-Chen , Huang, Zhen-Jia , Wang, Ao , Yu, Jian-Ying , Zhang, Jian-Yu , Xiao, Zi-Jun et al. Immobilisation remediation of arsenic-contaminated soils with promising CaAl-layered double hydroxide and bioavailability, bioaccessibility, and speciation-based health risk assessment . | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 469 . |
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Dissolved organic matter (DOM) is important in determining the drinking water treatment and the supplied water quality. However, a comprehensive DOM study for the whole water supply system is lacking and the potential effects of secondary water supply are largely unknown. This was studied using dissolved organic carbon (DOC), absorption spectroscopy, and fluorescence excitation -emission matrices -parallel factor analysis (EEMPARAFAC). Four fluorescent components were identified, including humic-like C1-C2, tryptophan-like C3, and tyrosine -like C4. In the drinking water treatment plants, the advanced treatment using ozone and biological activated carbon (O3-BAC) was more effective in removing DOC than the conventional process, with the removals of C1 and C3 improved by 17.7%-25.1% and 19.2%-27.0%. The absorption coefficient and C1-C4 correlated significantly with DOC in water treatments, suggesting that absorption and fluorescence could effectively track the changes in bulk DOM. DOM generally remained stable in each drinking water distribution system, suggesting the importance of the treated water quality in determining that of the corresponding network. The optical indices changed notably between distribution networks of different treatment plants, which enabled the identification of changing water sources. A comparison of DOM in the direct and secondary water supplies suggested limited impacts of secondary water supply, although the changes in organic carbon and absorption indices were detected in some locations. These results have implications for better understanding the changes of DOM in the whole water supply system to help ensure the supplied water quality.
Keyword ：
Dissolved organic matter Dissolved organic matter Drinking water treatment Drinking water treatment Fluorescence excitation -emission matrices Fluorescence excitation -emission matrices Parallel factor analysis Parallel factor analysis Water supply system Water supply system
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| GB/T 7714 | Lin, Jinjin , Yang, Liyang , Zhuang, Wan-E et al. Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices [J]. | JOURNAL OF ENVIRONMENTAL MANAGEMENT , 2024 , 358 . |
| MLA | Lin, Jinjin et al. "Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices" . | JOURNAL OF ENVIRONMENTAL MANAGEMENT 358 (2024) . |
| APA | Lin, Jinjin , Yang, Liyang , Zhuang, Wan-E , Wang, Yue , Chen, Xiaochen , Niu, Jia . Tracking the changes of dissolved organic matter throughout the city water supply system with optical indices . | JOURNAL OF ENVIRONMENTAL MANAGEMENT , 2024 , 358 . |
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The production of isolated metallic nanoparticles with multifunctionalized properties, such as size and shape, is crucial for biomedical, photocatalytic, and energy storage or remediation applications. This study investigates the initial particle formations of gold nanoparticles (AuNPs) bioproduced in the cyanobacteria Anabaena sp. using high-resolution transmission electron microscopy images for digital image analysis. The developed method enabled the discovery of cerium nanoparticles (CeNPs), which were biosynthesized in the cyanobacteria Calothrix desertica. The particle size distributions for AuNPs and CeNPs were analyzed. After 10 h, the average equivalent circular diameter for AuNPs was 4.8 nm, while for CeNPs, it was approximately 5.2 nm after 25 h. The initial shape of AuNPs was sub-round to round, while the shape of CeNPs was more roundish due to their amorphous structure and formation restricted to heterocysts. The local PSDs indicate that the maturation of AuNPs begins in the middle of vegetative cells and near the cell membrane, compared to the other regions of the cell.
Keyword ：
Anabaena sp. Anabaena sp. biorecovery biorecovery biosynthesis biosynthesis Calothrix desertica Calothrix desertica digital image analysis digital image analysis TEM TEM
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| GB/T 7714 | Fritz, Melanie , Chen, Xiaochen , Yang, Guifang et al. Gold Nanoparticles Bioproduced in Cyanobacteria in the Initial Phase Opened an Avenue for the Discovery of Corresponding Cerium Nanoparticles [J]. | MICROORGANISMS , 2024 , 12 (2) . |
| MLA | Fritz, Melanie et al. "Gold Nanoparticles Bioproduced in Cyanobacteria in the Initial Phase Opened an Avenue for the Discovery of Corresponding Cerium Nanoparticles" . | MICROORGANISMS 12 . 2 (2024) . |
| APA | Fritz, Melanie , Chen, Xiaochen , Yang, Guifang , Lv, Yuancai , Liu, Minghua , Wehner, Stefan et al. Gold Nanoparticles Bioproduced in Cyanobacteria in the Initial Phase Opened an Avenue for the Discovery of Corresponding Cerium Nanoparticles . | MICROORGANISMS , 2024 , 12 (2) . |
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Microplastics (MPs) have been widely found in the environment and have exerted non-negligible impacts on the environment and human health. Extensive research has shown that MPs can act as carriers for viruses and interacts with them in various ways. Whether MPs influence the persistence, transmission and infectivity of virus has attracted global concern in the context of increasing MPs contamination. This review paper provides an overview of the current state of knowledge regarding the interactions between MPs and viruses in aquatic environments. Latest progress and research trends in this field are summarized based on literature analysis. Additionally, we discuss the potential risks posed by microplastic-associated viruses to human health and the environmental safety, highlighting that MPs can affect viral transmission and infectivity through various pathways. Finally, we underscores the need for further research to address key knowledge gaps, such as elucidating synergistic effects between MPs and viruses, understanding interactions under real environmental conditions, and exploring the role of biofilms in virus–MPs interactions. This review aims to contribute to a deeper understanding on the transmission of viruses in the context of increasing MPs pollution in water, and promote actions to reduce the potential risks. Copyright © 2024 Wang, Zheng, Wang, Hou, He, Wang, Zhang, Chen and Liu.
Keyword ：
adsorption adsorption impact impact mechanism mechanism microplastics microplastics viruses viruses
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| GB/T 7714 | Wang, X. , Zheng, K. , Wang, Y. et al. Microplastics and viruses in the aquatic environment: a mini review [未知]. |
| MLA | Wang, X. et al. "Microplastics and viruses in the aquatic environment: a mini review" [未知]. |
| APA | Wang, X. , Zheng, K. , Wang, Y. , Hou, X. , He, Y. , Wang, Z. et al. Microplastics and viruses in the aquatic environment: a mini review [未知]. |
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针对低温时饮用水深度处理工艺生物活性炭（BAC）无法高效去除水中氨氮的问题，选用实际水厂运行中的BAC搭建滤柱连续培养反应器，通过室内控制实验，对比常温和低温下不同层BAC的氨氮去除效果及其硝化潜势，并运用分子生物学技术解析BAC上氨氧化古菌（AOA）和氨氧化细菌（AOB）的群落丰度和群落结构。结果表明，尽管低温时BAC各层去除氨氮的效率低于常温，但在一个反冲洗周期的后段仍能够达到常温时的氨氮去除效果，且其硝化潜势高于常温。低温下BAC上氨氧化微生物丰度高于常温，且AOA的数量变化最大（增加2个数量级）。针对功能基因amoA的T-RFLP分析发现，A-OTU2和A-OTU3以及B-OTU5分别为低温下主导的AOA和AOB。今后应更加关注低温下AOA及特定菌种在BAC上的定植及活性促进问题。
Keyword ：
氨氧化古菌 氨氧化古菌 氨氧化细菌 氨氧化细菌 氨氮 氨氮 温度 温度 生物活性炭 生物活性炭 群落结构 群落结构
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| GB/T 7714 | 牛佳 , 余爽 , 汤旸旸 et al. 温度影响BAC去除饮用水中氨氮的生物学机理 [J]. | 中国给水排水 , 2024 , 40 (15) : 44-49 . |
| MLA | 牛佳 et al. "温度影响BAC去除饮用水中氨氮的生物学机理" . | 中国给水排水 40 . 15 (2024) : 44-49 . |
| APA | 牛佳 , 余爽 , 汤旸旸 , 黄怡婷 , 龚珑聪 , 王悦 et al. 温度影响BAC去除饮用水中氨氮的生物学机理 . | 中国给水排水 , 2024 , 40 (15) , 44-49 . |
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advanced technologies/systems advanced technologies/systems conventional contaminants conventional contaminants emerging contaminants emerging contaminants environmental engineering environmental engineering microorganisms microorganisms municipal engineering municipal engineering
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| GB/T 7714 | Chen, Xiaochen , Kasuga, Ikuro , Liu, Xianhua et al. New insight into the roles of microorganisms in municipal and environmental engineering technologies/systems [J]. | FRONTIERS IN MICROBIOLOGY , 2024 , 14 . |
| MLA | Chen, Xiaochen et al. "New insight into the roles of microorganisms in municipal and environmental engineering technologies/systems" . | FRONTIERS IN MICROBIOLOGY 14 (2024) . |
| APA | Chen, Xiaochen , Kasuga, Ikuro , Liu, Xianhua , Li, Hongbo , Zeng, Ming , Cai, Xiaolin . New insight into the roles of microorganisms in municipal and environmental engineering technologies/systems . | FRONTIERS IN MICROBIOLOGY , 2024 , 14 . |
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Whether coexisting microplastics (MPs) affect the ecological and health risks of cadmium (Cd) in soils is a cutting-edge scientific issue. In this study, four typical Chinese soils were prepared as artificially Cdcontaminated soils with/without aged polystyrene (PS). TCLP and in vitro PBET model were used to determine the leachability (ecological risk) and oral bioaccessibility (human health risk) of soil Cd. The mechanisms by which MPs influence soil Cd were discussed from direct and indirect perspectives. Results showed that there was no significant difference in the leachability of soil Cd with/without aged PS. Additionally, aged PS led to a significant decrease in the bioaccessibility of soil Cd in gastric phase, but not in small intestinal phase. The increase in surface roughness and the new characteristic peaks (e.g., Si -O -Si) of aged PS directly accounted for the change in Cd bioaccessibility. The change in organic matter content indirectly accounted for the exceptional increase in Cd bioaccessibility of black soil with aged PS in small intestinal phase. Furthermore, the changes in cation exchange capacity and Cd mobility factor caused by aged PS explained the change in Cd leachability. These results contribute to a deeper understanding about environmental and public health in complicated emerging scenarios.
Keyword ：
Bioaccessibility Bioaccessibility Cd Cd in vitro test in vitro test Leachability Leachability Microplastics Microplastics
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| GB/T 7714 | Chen, Xiao-Chen , Wang, Ao , Wang, Jun-Jie et al. Influences of coexisting aged polystyrene microplastics on the ecological and health risks of cadmium in soils: A leachability and oral bioaccessibility based study [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 469 . |
| MLA | Chen, Xiao-Chen et al. "Influences of coexisting aged polystyrene microplastics on the ecological and health risks of cadmium in soils: A leachability and oral bioaccessibility based study" . | JOURNAL OF HAZARDOUS MATERIALS 469 (2024) . |
| APA | Chen, Xiao-Chen , Wang, Ao , Wang, Jun-Jie , Zhang, Zeng-Di , Yu, Jian-Ying , Yan, Ying-Jie et al. Influences of coexisting aged polystyrene microplastics on the ecological and health risks of cadmium in soils: A leachability and oral bioaccessibility based study . | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 469 . |
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Introduction In recent years, researchers have been exploring the plastic-degrading abilities of bacteria residing in the guts of Styrofoam-eating Tenebrio molitor larvae. However, none of the reported strains have displayed highly efficient plastic degradation capabilities, and it's noteworthy that none of the existing studies have focused on strictly anaerobic microbes.Methods In this study, we exclusively fed Styrofoam to T. molitor larvae and examined how this dietary change influence the gut's bacterial community composition, as observed through fecal bacteria using bacterial 16S rRNA gene amplicon sequencing and the small-scale culturomics method with 20 types of anaerobic media under four different conditions.Results The results revealed a significant shift in the dominant phylogroup from Lactococcus (37.8%) to Escherichia-Shigella (54.7%) when comparing the feces of larvae fed with bran and Styrofoam, as analyzing through the bacterial 16S rRNA gene amplicon sequencing. For small-scale culturomics method, a total of 226 strains of anaerobic bacteria were isolated and purified using the rolling-tube/strictly anaerobic technique. Among them, 226 strains were classified into 3 phyla, 7 classes, 9 orders, 17 families, 29 genera, 42 known species and 34 potential novel species.Discussion Interestingly, 24 genera in total, identified through the culturomics method, were not found in the results obtained from amplicon sequencing. Here, we present a collection of culturable anaerobic bacteria from the feces of T. molitor larvae, which might be a promising avenue for investigating the biodegradability of plastics by combining specific strains, either randomly or intentionally, while considering the abundance ratio of the microbial community composition.
Keyword ：
anaerobic bacteria anaerobic bacteria bacterial diversity bacterial diversity feces feces gut microbiome gut microbiome polystyrene polystyrene Styrofoam Styrofoam Tenebrio molitor Tenebrio molitor
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| GB/T 7714 | Zhu, Junyu , Chen, Xiaochen , Chen, Sheng-Chung et al. Diversity and community composition of strictly anaerobic and culturable bacteria from the feces of Styrofoam-fed Tenebrio molitor larvae: a culturomics-based study [J]. | FRONTIERS IN MICROBIOLOGY , 2023 , 14 . |
| MLA | Zhu, Junyu et al. "Diversity and community composition of strictly anaerobic and culturable bacteria from the feces of Styrofoam-fed Tenebrio molitor larvae: a culturomics-based study" . | FRONTIERS IN MICROBIOLOGY 14 (2023) . |
| APA | Zhu, Junyu , Chen, Xiaochen , Chen, Sheng-Chung , Qiu, Wanling , Yu, Jianying , Guo, Tengfei et al. Diversity and community composition of strictly anaerobic and culturable bacteria from the feces of Styrofoam-fed Tenebrio molitor larvae: a culturomics-based study . | FRONTIERS IN MICROBIOLOGY , 2023 , 14 . |
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Herein, the particle size distributions (PSDs) and shape analysis of in vivo bioproduced particles from aqueous Au3+ and Eu3+ solutions by the cyanobacterium Anabaena sp. are examined in detail at the nanoscale. Generally, biosynthesis is affected by numerous parameters. Therefore, it is challenging to find the key set points for generating tailored nanoparticles (NPs). PSDs and shape analysis of the Au and Eu-NPs were performed with ImageJ using high-resolution transmission electron microscopy (HR-TEM) images. As the HR-TEM image analysis reflects only a fraction of the detected NPs within the cells, additional PSDs of the complete cell were performed to determine the NP count and to evaluate the different accuracies. Furthermore, local PSDs were carried out at five randomly selected locations within a single cell to identify local hotspots or agglomerations. The PSDs show that particle size depends mainly on contact time, while the particle shape is hardly affected. The particles formed are distributed quite evenly within the cells. HR-PSDs for Au-NPs show an average equivalent circular diameter (ECD) of 8.4 nm (24 h) and 7.2 nm (51 h). In contrast, Eu-NPs preferably exhibit an average ECD of 10.6 nm (10 h) and 12.3 nm (244 h). Au-NPs are classified predominantly as "very round" with an average reciprocal aspect ratio (RAR) of similar to 0.9 and a Feret major axis ratio (FMR) of similar to 1.17. Eu-NPs mainly belong to the "rounded" class with a smaller RAR of similar to 0.6 and a FMR of similar to 1.3. These results show that an increase in contact time is not accompanied by an average particle growth for Au-NPs, but by a doubling of the particle number. Anabaena sp. is capable of biosorbing and bioreducing dissolved Au3+ and Eu3+ ions from aqueous solutions, generating nano-sized Au and Eu particles, respectively. Therefore, it is a low-cost, non-toxic and effective candidate for a rapid recovery of these sought-after metals via the bioproduction of NPs with defined sizes and shapes, providing a high potential for scale-up.
Keyword ：
cyanobacteria cyanobacteria digital image processing digital image processing growth monitoring growth monitoring nanoparticle size distribution nanoparticle size distribution shape classification shape classification
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| GB/T 7714 | Fritz, Melanie , Koersten, Susanne , Chen, Xiaochen et al. Time-Dependent Size and Shape Evolution of Gold and Europium Nanoparticles from a Bioproducing Microorganism, a Cyanobacterium: A Digitally Supported High-Resolution Image Analysis [J]. | NANOMATERIALS , 2023 , 13 (1) . |
| MLA | Fritz, Melanie et al. "Time-Dependent Size and Shape Evolution of Gold and Europium Nanoparticles from a Bioproducing Microorganism, a Cyanobacterium: A Digitally Supported High-Resolution Image Analysis" . | NANOMATERIALS 13 . 1 (2023) . |
| APA | Fritz, Melanie , Koersten, Susanne , Chen, Xiaochen , Yang, Guifang , Lv, Yuancai , Liu, Minghua et al. Time-Dependent Size and Shape Evolution of Gold and Europium Nanoparticles from a Bioproducing Microorganism, a Cyanobacterium: A Digitally Supported High-Resolution Image Analysis . | NANOMATERIALS , 2023 , 13 (1) . |
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