摘要：
To reduce the consumption of oxidant and catalyst in Fenton-like reaction and to realize the reuse of catalyst, yeast supported iron nanoparticles (nZVI@SC(M)) was synthesized by tobacco leaf extract and applied in the heterogeneous Fenton-like degradation of aqueous methylene blue (MB) at ambient conditions. The performance of the composite was exploited in terms of catalytic activity and factors influencing MB degradation. The surface changes of nZVI@SC(M) before and after reaction were characterized by XPS, SEM, FT-IR and XRD. Iron leaching, primary reactive oxidizing species, and the storage stability and reusability of catalyst were also investigated. Typically, 99.7% removal of 50mg/L MB, with a TOC removal of 97.2%, could be achieved within 10h by 0.1g/L nZVI@SC(M) coupled with 1.0mMH(2)O(2). The MB degradation is in good agreement with the pseudo-first-order model, and hydroxyl radicals in the bulk solution is the main reactive oxidizing species responsible for MB degradation. Based on the identified intermediates by liquid chromatography/mass spectrometry, the possible MB degradation mechanism in the nZVI@SC(M)/H(2)O(2) system is discussed. The developed high-performance nZVI@SC(M) catalyst strategy can provide a new route in enhancing the Fenton-like degradation of organic contaminants with less consumption of catalyst and oxidant.
作者机构：
[Lobato-de Magalhaes, Tatiana] Univ Autonoma Queretaro, Fac Nat Sci, Santiago De Queretaro 76230, Mexico.;[Tapia-Grimaldo, Julissa; Murphy, Kevin] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.;[Davidson, Thomas A.] Aarhus Univ, Dept Ecosci, Lake Grp, DK-8600 Silkeborg, Denmark.;[Molina-Navarro, Eugenio] Univ Alcala, Dept Geol Geog & Environm, Madrid 28802, Spain.;[Wood, Kevin A.] Wildfowl & Wetlands Trust WWT, Slimbridge GL2 7BT, Glos, England.
通讯机构：
[Tatiana Lobato‑de Magalhães] F;Faculty of Natural Sciences, Universidad Autónoma de Querétaro, Santiago de Querétaro, Mexico
关键词：
Ancient vicariance;Anthropochory;Invasiveness;Long-distance movement;Plant distribution;Zoochory
摘要：
No previous study has examined the large-scale distributional drivers of the entire global pool of 3,499 macrophyte species, despite the obvious importance of this for understanding the macroecology of these plants. To assess the hypothesis that natural rather than human-related transfer vectors act as the primary long-distance drivers of global movement of aquatic macrophytes, we analysed current macrophyte species distributions in relation to a set of human-related and natural transfer vectors. Most macrophytes (2,492 species: 71.2% of the global total) are endemic to a single ecozone, and generally lack the various functional adaptations needed for successful long-distance propagule transport. Such traits are, however, common in the 1,007 (28.8%) species native in > 1 ecozone. In total, 779 species (22.3%) are introduced, naturalised or invasive (I species) in one or more ecozones outwith their native range. The proportion of I species varies between ecozones and is best predicted by annual temperature and longitude. A migratory bird transfer vector and climatic variables strongly predict global native macrophyte species occurrence. Some native species of Miocene origin (or older) may have had their world distribution influenced by ancient vicariance events, while inter-ecozone hydrochory and Late Quaternary climate change are also relevant factors influencing a few species.
摘要：
Mulberry is an economically important crop for sericulture in China. Mulberry plantations are shifting inland, where they face high salinity. Arbuscular mycorrhizal fungi (AMF) reportedly enhance mulberry's tolerance to salinity. Here, we assessed if additional adaptive advantages against salinity are provided by sex differences beyond those provided by mycorrhizal symbiosis. In a pot experiment, male and monoecious plants were exposed to three salinity regimes (0, 50, and 200mM NaCl) and two mycorrhiza-suppressed conditions (with or without benomyl application) for more than 16 months. We noticed that salinity alone significantly decreased the mycorrhizal colonization rate, salinity tolerance, K(+) concentrations, and the ionic ratios of all plants. Mycorrhizal association mildly ameliorated the salt-induced detrimental effects, especially for monoecious plants, and sex-specific responses were observed. Meanwhile, both sexes had adopted different strategies to enhance their salinity resistance. Briefly, mycorrhizal monoecious plants exhibited a higher net photosynthetic rate and lower translocation of Na(+) from root to shoot compared with mycorrhizal males under saline conditions. Their salt tolerance was probably due to the Ca(2+)/Na(+) in roots. In comparison, male plants exhibited lower Na(+) acquisition, more Na(+) translocated from root to shoot, higher root biomass allocation, and higher N concentrations under harsh saline conditions, and their salt tolerance was mainly related to the K(+)/Na(+) in their shoots. In conclusion, our results highlight that AMF could be a promising candidate for improving plant performance under highest salinity, especially for monoecious plants. Cultivators must be mindful of applying fungicides, such as benomyl, in saline areas.
通讯机构：
[Qingru Zeng] D;Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
heavy metal;hydrochar;Cd;HCl;sunflower;species
摘要：
The removal of heavy metals is crucial to the utilization of contaminated biomass resources. In this study, we report an efficient process of hydrothermal conversion (HTC) of sunflower straw (Helianthus annuus L.) to remove heavy metals. The effect of different HTC temperatures and concentrations of HCl additives on heavy metal removal efficiency was investigated. The results revealed that increasing the temperature or concentration of HCl promoted the transfer of heavy metals from hydrochar to liquid products during HTC. The heavy metals removed to the liquid products included up to 99% of Zn and Cd, 94% of Cu, and 87% of Pb after hydrothermal conversion with a temperature of 200 degrees C and HCl 2%. The species of heavy metals in hydrochars converted from unstable to stable with an increase in temperature from 160 degrees C to 280 degrees C. The stable fractions of heavy metals in the acidic condition decreased as the acid concentration increased. This aligns well with the high transfer efficiency of heavy metals from the solid phase to the liquid phase under acidic conditions. The FTIR indicated that the carboxy and hydroxy groups decreased significantly as the temperature increased and the concentration of HCl increased, which promoted the degradation of sunflower straw. A scan electron microscope showed that the deepening of the destruction of the initial microstructure promotes the transfer of heavy metals from hydrochars to liquid phase products. This acid-assisted hydrothermal process is an efficient method to treat biomass containing heavy metals.
期刊：
Journal of Hazardous Materials,2023年447:130755 ISSN：0304-3894
通讯作者：
Lei, Ming
作者机构：
[Huang, Yayuan; Mensah, Caleb Oppong; Tie, Boqing; Li, Bingyu; Wei, Dongning; Lei, Ming; Zhou, Yimin; Jing, Miaomiao] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Peoples R China.;[Huang, Yayuan; Mensah, Caleb Oppong; Tie, Boqing; Li, Bingyu; Lei, Ming; Zhou, Yimin; Jing, Miaomiao] Hunan Engn & Technol Res Ctr Irrigat Water Purific, Changsha 410128, Peoples R China.;[Long, Jiumei] Hengyang Normal Univ, Coll Life Sci & Environm, Hengyang 421008, Peoples R China.;[Lei, Ming] 1st Nongda Rd, Changsha, Peoples R China.
通讯机构：
[Ming Lei] C;College of Resource and Environment, Hunan Agricultural University, Changsha 410128, PR China<&wdkj&>Hunan Engineering and Technology Research Center for Irrigation Water Purification, Changsha 410128, PR China
摘要：
Arsenic (As) and cadmium (Cd) often coexist in paddy soils. Nano-ferrihydrite colloidal particles (NFPs) are ubiquitous at redox active interfaces of the paddy system and are well-known to play a critical role in controlling the solubility and bio-availability of As and Cd. However, the mutual interaction between As and Cd on NFPs remains elusive. Herein, batch experiments and in-situ spectroscopic techniques were used to investigate the effects of the interaction pattern (sequential reaction) of Cd(II) and As(V) on their respective adsorption on the surfaces of NFPs. Two scenarios were designed: Cd(II) pre-saturated NFPs and As(V) pre-saturated NFPs. Adsorption of Cd(II) was increased by 1.67, 4.08, and 5.21 times in As(V)-saturated NFPs, but only by 1.05, 1.11, and 1.15 times for As(V) in Cd(II)-saturated NFPs. Further, we determined the pH-dependent mutually beneficial cooperation pathways as mediated by the surface of NFPs. At lower pH (5), As(V) tended to promote Cd(II) adsorption, whereas Cd(II) tended to enhance As(V) adsorption at higher pH (> 5.5). X-ray photoelectron spectroscopy (XPS) indicated that both pre-saturated Cd(II) and As(V) altered the local coordination environment of their counterpart ions. Furthermore, results from in-situ attenuated total reflection-Fourier-transform infrared spectroscopy (ATR-FTIR) and second derivative peak shape fitting revealed two types of ternary surface complexes, namely Cd(II)-bridged and As(V)-bridged complexes, which were responsible for the distinct Cd(II) and As(V) co-adsorption behavior on the surface of NFPs under different conditions. These findings help us understand how co-presence Cd and As behave in an iron-rich geological setting and will aid in the development of related restoration technologies.
通讯机构：
[Jie Zhao; Kelin Wang] K;Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China<&wdkj&>Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Sciences, Huanjiang, Guangxi 547100, China<&wdkj&>Guangxi Key Laboratory of Karst Ecological Processes and Services, Huanjiang, Guangxi 547100, China<&wdkj&>Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China<&wdkj&>Guangxi Industrial Technology Research Institute for Karst Rocky Desertification Control, Nanning, Guangxi 530012, China<&wdkj&>Huanjiang Observation and Research Station for Karst Ecosystems, Chinese Academy of Sciences, Huanjiang, Guangxi 547100, China<&wdkj&>Guangxi Key Laboratory of Karst Ecological Processes and Services, Huanjiang, Guangxi 547100, China
摘要：
Water pollution caused by heavy metals poses a serious threat to the ecological environment and human health, which requires the exploration of efficient, economical and convenient methods to solve such urgent problems. In this work, agricultural waste straw was prepared and modified by spinel bimetal through sol-gel method to obtain novel MnFe2O4 loaded biochar with the purpose of efficiently cadmium (Cd) removal from water. Results showed that the as-prepared composites showed much higher Cd adsorption capacity as compared to the original biochar (127.37 vs 25.73 mg/g). Further investigation showed that the integrity of crystal plane structure contributes to the appearance of net-like pore and the 18-fold enlarged specific surface area. Strong anti -interference ability of the spinel loaded biochar was observed in binary and quaternary systems through adsorption affinity investigation using separation factor (alpha CdMetal, Metal=Pb, Zn, Cu). Due to its magnetic prop-erties, the adsorbent was easily separated and recovered from aquatic solutions, and the adsorption capacity showed little decrease after five cycles. This work provided the references for resource utilization of agricultural wastes and its application in wastewater treatment.
摘要：
With the development of nanotechnology, nano-pesticides have been developed and show better application effects than traditional pesticides, which have a good development prospect. Copper hydroxide nanoparticles (Cu(OH)(2) NPs) are one of the specific fungicides. However, there is still no reliable method to evaluate their environmental processes, which is essential for the broad application of new pesticides. Since soil is a vital link between pesticides and crops, this study took linear and slightly soluble Cu(OH)(2) NPs as the research object and established a method to quantitatively extract Cu(OH)(2) NPs from the soil. Five essential parameters in the extraction process were optimized first, and then the extraction effect of this optimal method was further tested under different nanoparticles and soil conditions. The optimal extraction method was determined, including (i) Dispersant: 0.2% carboxymethyl cellulose (CMC) with a molecular weight of 250,000; (ii) Mixing conditions of soil and dispersant: water bath shaking for 30min, water bath ultrasonication for 10min (energy of the ultrasonication=6kJ/ml); (iii) Phase separation conditions: settlement for 60min; (iv) Solid-to-liquid ratio: 1:20; (v) 1 extraction cycle. After optimization, 81.5% of the supernatant was Cu(OH)(2) NPs, and 2.6% was dissolved copper ions (Cu(2+)). This method showed good applicability to different concentrations of Cu(OH)(2) NPs and different farmland soils. It also showed significant differences in the extraction rates of copper oxide nanoparticles (CuO NPs), Cu(2+), and other copper sources. The addition of a small amount of silica was confirmed to improve the extraction rate of Cu(OH)(2) NPs. The establishment of this method lays the foundation for the quantitative analysis of nano-pesticides and other non-spherical and slightly soluble nanoparticles.
作者：
Su, Liang;Du, Hu;Zeng, Fuping;Peng, Wanxia;Wang, Hua;...
期刊：
林业研究(英文版),2023年34(5):1323-1331 ISSN：1007-662X
通讯作者：
Hu Du<&wdkj&>Tongqing Song
作者机构：
[Zeng, Fuping; Su, Liang; Song, Tongqing; Wang, Kelin; Du, Hu; Peng, Wanxia; Lu, Menzhen] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha, Peoples R China.;[Zeng, Fuping; Su, Liang; Song, Tongqing; Wang, Kelin; Du, Hu; Peng, Wanxia; Lu, Menzhen] Chinese Acad Sci, Guangxi Key Lab Karst Ecol Proc & Serv, Huanjiang Observat & Res Stn Karst Ecosyst, Huanjiang, Peoples R China.;[Su, Liang; Wang, Hua] Hunan Agr Univ, Coll Resources & Environm, Changsha, Peoples R China.
通讯机构：
[Hu Du; Tongqing Song] K;Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academic of Sciences, Changsha, People’s Republic of China<&wdkj&>Guangxi Key Laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station of Karst Ecosystem, Chinese Academic of Sciences, Huanjiang, People’s Republic of China<&wdkj&>Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academic of Sciences, Changsha, People’s Republic of China<&wdkj&>Guangxi Key Laboratory of Karst Ecological Processes and Services, Huanjiang Observation and Research Station of Karst Ecosystem, Chinese Academic of Sciences, Huanjiang, People’s Republic of China
关键词：
Species composition;Spatial distribution;Variation partitioning;Community assembly;Karst ecosystems
摘要：
Spatial and environmental processes are two ecological processes that have attracted considerable attention in plant community assembly, depending on sampling scale and life history. However, the processes that determine community assembly have not been studied in the karst region of southwest China. In this study, a 25-ha (500 m x 500 m) monitoring plot within the subtropical climax forest in the karst region was established and canonical correspondence analysis was used to reveal the effects of topography and soil on the spatial patterns of tree community assembly. Our study suggests that spatial processes dominate species composition and the combined effects of spatial and environmental processes play an important role. Overall interpretation rate increases with enlarging the sampling scale. However, the pattern of variation partitioning was similar in different life stages. Environmental variables significantly affected species composition at different sampling sizes and life histories and had a higher interpretation rate of species composition on larger sampling sizes. Topographic wetness index was the most important variable to explain species composition of the environmental variables. These results suggest that it is necessary to consider the relative importance of environmental and spatial factors on community assembly to better understand, conserve, and manage subtropical karst forests.
期刊：
Journal of Environmental Management,2023年345:118451 ISSN：0301-4797
通讯作者：
Zou, Yeai;Xie, YH;Zou, Y
作者机构：
[Deng, Zhengmiao; Xie, Yonghong; Zou, Yeai; Li, Feng; Zhang, Pingyang] Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China.;[Deng, Zhengmiao; Xie, Yonghong; Zhang, Siqi; Zou, Yeai; Li, Feng; Zhang, Pingyang] Chinese Acad Sci, Inst Subtrop Agr, Dongting Lake Stn Wetland Ecosyst Res, Changsha 410125, Peoples R China.;[Zhang, Siqi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Wu, Ting] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Zhang, Hong] Forestry Bur Yueyang, Yueyang 414000, Peoples R China.
通讯机构：
[Xie, YH ; Zou, Y; Zou, Y ] C;Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China.;Chinese Acad Sci, Inst Subtrop Agr, Dongting Lake Stn Wetland Ecosyst Res, Changsha 410125, Peoples R China.;Chinese Acad Sci, Inst Subtrop Agr, 644, Yuanda Second Rd, Changsha 410125, Peoples R China.
关键词：
Dongting lake;Habitat suitability;Hydrological change;Species distribution model;Wetland management
摘要：
The operation of the Three Gorges Project (TGP) has influenced the wetland ecosystems downstream, thereby affecting the distribution of habitats suitable for waterbirds. However, dynamic studies on habitat distribution under different water regimes are lacking. Here, using data from three successive wintering periods representing three typical water regimes, we modelled and mapped the habitat suitability of three waterbird groups in Dongting Lake, which is the first river-connected lake downstream of the TGP, and a crucial wintering ground for waterbirds along the East Asian-Australasian Flyway. The results showed that the spatial pattern of habitat suitability varied among the wintering periods and waterbird groups. The analysis estimated the largest suitable habitat area for the herbivorous/tuber-eating group (HTG) and the insectivorous waterbird group (ING) under a normal water recession pattern, whereas early water recession had a more adverse effect. The suitable habitat area for the piscivorous/omnivorous group (POG) was higher under late water recession than under normal conditions. The ING was the most affected by hydrological changes among the three waterbird groups. Further, we identified the key conservation and potential restoration habitats. The HTG exhibited the largest key con-servation habitat area compared to the other two groups, while the ING showed a potential restoration habitat area larger than its key conservation habitat area, indicating its sensitivity to environmental changes. The optimal inundation durations from September 1 to January 20 for HTG, ING and POG were 52 & PLUSMN; 7 d, 68 & PLUSMN; 18 d, and 132 & PLUSMN; 22 d, respectively. Therefore, the water recession starting in mid-October may be favourable for waterbirds in Dongting Lake. Altogether, our results can be used as guidance for prioritising certain management actions for waterbird conservation. Moreover, our study highlighted the importance of considering habitat spatiotemporal variation in highly dynamic wetlands when implementing management practices.
摘要：
Abundant evidence has demonstrated the feasibility of reducing phosphorus (P) input to face diminishing phosphate rock resources and deteriorating environmental quality in double-cropping paddy. However, the sustainability of reduced P input in the context of maintaining productivity and P efficient utilization is not yet clear. Herein, an 8-year (2013-2021) field-based database was built to explore the effects of reduced P input on rice productivity and the soil-plant P trade-off in double-cropping paddy. In the early and late rice seasons, compared with conventional P fertilization (early rice, 90 kg hm(-2); late rice, 60 kg hm(-2)), the average yield of reduced 10 % P treatment increased by 4.3 % and 2.1 %, respectively; reduced 10-30 % P treatments increased average P use efficiency by 17.1-18.4 % and 14.0-17.2 %, decreased average total P runoff loss by 14.9-33.2 % and 20.8-36.4 %, and decreased average total P leaching loss by 18.5-49.0 % and 24.0-46.1 %, respectively. Compared with conventional fertilization, reduced P fertilizer input by 10 % significantly increased the content of the soil labile-P fraction while reducing that of the soil stable-P fraction. Soil ligand-P and exchangeable-P content decreased with the gradient reduction of P fertilizer input (10-30 %). The main predictors of the change in rice yield and plant P uptake were soil ligand-P and exchangeable-P content, respectively. The dominant predictor of both the P runoff loss and the P activation coefficient was the inorganic P content extracted by NaHCO(3). These findings suggest that reduced P input by 10 % could maintain rice productivity and P use efficiency in the double-cropping paddy, and the transformations between soil P components and increases in P bioavailability may be the key drivers maintaining rice productivity and P utilization under the context of reduced P loading.
通讯机构：
[Ouyang, NX ; Wei, X ; Ouyang, NX] H;Hunan Univ Finance & Econ, Changsha 410205, Peoples R China.;Hunan Econ Geog Technol Dev Co Ltd, Changsha 410205, Peoples R China.;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
关键词：
Available silicon;Parent material;Machine learning;Plough layer;Subsurface layer
摘要：
Silicon can promote rice growth and reduce the toxicity of heavy metals in rice. However, controlling factors for the vertical distribution of silicon in typical paddy soils in mid-subtropical regions of China remain largely unexplored. Here, we aimed to analyze the silicon content in plough and subsurface layers derived from six parent materials in Hunan Province (southern China) based on 62 soil profile samples. Multiple stepwise regression, random forest, and gradient boosting machine learning models were used and compared to predict soil available silicon content and quantify the contribution of different variables on silicon variation. We found that plough layers in the eastern (85% of points) and western (78% of points) Hunan Province were deficient (< 100 mg kg(-1)) in available silicon content. Total silicon content in paddy soil derived from slate (623 & PLUSMN; 100 g kg(-1)) and limestone (606 & PLUSMN; 74 g kg(-1)) was higher than in other soils. The available silicon content was the lowest in granite (51 & PLUSMN; 15 mg kg(-1)). It was closely correlated with available cadmium while being mainly influenced by soil pH, organic carbon, and bulk density. The prediction model of available Si established using a random forest had the highest accuracy (R-2 = 0.74). Widespread deficiency in available silicon content in plough layers of paddy soil in mid-subtropical China highlights the importance and value of higher silicon fertilizer input in soils.
通讯机构：
[Yuping Zhang; Jiangchi Fei] C;College of Resources and Environment, Hunan Agricultural University, Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China<&wdkj&>National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China
作者机构：
[Sun, Zhanxue; Hu, Zhongqiang; Yu, Xiaoxia; Zhou, Yaoyu; Zhou, Zhongkui; Liu, Yong; Guo, Jianping] East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Jiangxi, Peoples R China.;[Sun, Zhanxue; Hu, Zhongqiang; Yu, Xiaoxia; Zhou, Yaoyu; Zhou, Zhongkui; Liu, Yong; Guo, Jianping] East China Univ Technol, Sch Water Resources & Environm Engn, Nanchang 330013, Jiangxi, Peoples R China.;[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Zheng, Lili] Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China.;[Yang, Zhihui] Cent South Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Zhongkui Zhou; Yaoyu Zhou] S;State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China<&wdkj&>School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China<&wdkj&>State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China<&wdkj&>School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China<&wdkj&>College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
摘要：
Uranium is well-known to have serious adverse effects on the ecological environment and human health. Bioremediation stands out among many remediation methods owing to its being economically feasible and environmentally friendly. This study reported a great promising strategy for eliminating uranium by Stenotrophomonas sp. CICC 23833 in the aquatic environment. The bacterium demonstrated excellent uranium adsorption capacity (qmax = 392.9 mg/g) because of the synergistic effect of surface adsorption and intracellular accumulation. Further analysis revealed that hydroxyl, carboxyl, phosphate groups and proteins of microorganisms were essential in uranium adsorption. Intracellular accumulation was closely related to cellular activity, and the efficiency of uranium processing by the permeabilized bacterial cells was significantly improved. In response to uranium stress, the bacterium was found to release multiple ions in conjunction with uranium adsorption, which facilitates the maintenance of bacterial life activities and the conversion of uranyl to precipitates. These above results indicated that Stenotrophomonas sp. Had great potential application value for the remediation of uranium.
通讯机构：
[Gongwen Luo] C;College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China<&wdkj&>National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha 410128, China
关键词：
C mineralization;Compost maturity;Composting;Functional gene;Nutrient transformation
