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关键词： 青藏高原   土壤湿度   星基GNSS-R   CYGNSS   机器学习   随机森林  

摘要： 青藏高原的土壤湿度是全球水循环与气候变化的重要参数，但该地区复杂的地形及气候条件使土壤湿度的准确监测面临诸多挑战。本文基于全球导航卫星系统反射信号（GNSS-R）技术反演2020–2023年青藏高原解冻期（6–9月）土壤湿度，以旋风全球导航卫星系统（CYGNSS）提供的延迟多普勒映射（DDM）数据作为主要观测量，通过将欧洲第五代全球气候和天气再分析（ERA5）、美国全球陆面数据同化系统（GLDAS）、中国气象局陆面数据同化系统（CLDAS）再分析土壤湿度及土壤湿度主-被动遥感卫星（SMAP）卫星土壤湿度产品与那曲实测数据进行对比，评估各土壤湿度数据集在青藏高原地区的适用性，并提出融合地理差异和地形因素的星基GNSS-R青藏高原地区土壤湿度随机森林算法反演模型，并对反演结果进行验证。结果表明：与那曲地区实测数据相比，ERA5和CLDAS土壤湿度产品均能很好地反映青藏高原地区土壤湿度变化；不同土地覆盖类型下地表反射率与辅助参数之间的相关性具有显著差异，土壤湿度反演过程中需要考虑土地覆盖类型的影响；CLDAS和ERA5土壤湿度进行赋权结合作为目标参数能够提高青藏高原地区星基GNSS-R土壤湿度反演的精度和可靠性。

关键词： Lake pollution  

摘要： To investigate the influence of microbial communities on arsenic speciation in lake sediments of the Hetao Basin in Inner Mongolia during the ice-bound period, the sediments from Wuliangsuhai (WLSH) were taken as the research object. Using 16SrRNA high-throughput sequencing technology, the structural characteristics of microbial communities in WLSH sediments during the ice-bound period were studied. Additionally, methods such as redundancy analysis (RDA), correlation analysis, and co-occurrence network analysis were employed to explore the response relationship between sediment microbial communities and arsenic speciation during the ice-bound period. The results indicated that, apart from the residual arsenic, strongly adsorbed arsenic and arsenic co-precipitated with AVS(Acid-extractable sulfides in sediment), carbonates, manganese oxides, and poorly crystalline Fe hydroxides accounted for a relatively high proportion in the sediments of WLSH during the ice-bound period. When the sedimentary environment was unstable during the ice-bound period, there was a risk of secondary release of arsenic in the sediments of WLSH. The microbial community in the WLSH sediments during the ice-bound period exhibited abundant diversity, and the richness and diversity of microbial community species showed obvious spatial distribution characteristics. There was a significant collinear relationship between microbial communities and arsenic speciation during the ice-bound period, with Thiobacillus, Bacillus, Steroidobacter, Desulfosarcinaceae, and Anaerolinea exhibiting the most pronounced effects on arsenic speciation. Furthermore, adsorbed As, As co-precipitated with AVS, carbonates, manganese oxides, and poorly crystalline Fe hydroxides, as well as As in pyrite, could mutually transform during the ice-bound period, and Thiobacillus and Steroidobacter played crucial roles in this transformation process. This study aims to explore the impact of microbial communities on arsenic speciat

关键词： 舞蹈艺术   艺术审美   赋能   中华民族共同体意识  

摘要： 舞蹈艺术储存着各民族人民对中华民族共同体的记忆与情感，是联结各民族和凝聚共同体的精神纽带，也是铸牢中华民族共同体意识的重要载体。在舞蹈艺术审美与铸牢中华民族共同体意识的互动共赢中，中华各民族舞蹈艺术内蕴着的交往性、交融性、共同性、共享性这四个基本属性，不断型塑着各族人民“五个共同”“四个与共”“五个认同”的政治理念，使得各民族的中华民族共同体意识得以铸牢。通过分析舞蹈艺术审美与铸牢中华民族共同体意识的互动关系，提出了艺术互鉴、艺术互融、艺术互利三条路径，为推进中华民族舞蹈艺术发展和铸牢中华民族共同体意识提供了新思路。

关键词： Soil pollution  

摘要： The impacts of dry-rewetting and freeze-thaw cycles on DTPA-extractable Pb(II) content and Pb speciation in soils and material structure of weathered coal-based immobilized microbial materials were investigated through a controlled simulated experiment. This study aimed to explore the mechanisms through which these two factors affect the effectiveness of lead-contaminated soil remediation using selected microbes. The results showed that after 35 dry-rewetting cycles, the DTPA-extractable Pb(II) content in low-concentration lead-contaminated soil (LS) and high-concentration lead-contaminated soil (HS) decreased by 46.41% and 29.42%, respectively, compared to the initial levels. After 35 freeze-thaw cycles, the content in LS and HS decreased by 40.06% and 32.77%, respectively. Additionally, the residual fraction of Pb in LS increased under both dry-rewetting and freeze-thaw treatments. Structural analysis revealed that the surface of weathered coal-became rougher, with increases in specific surface area, oxygen-containing functional groups, and Pb adsorption sites increased after dry-wet and freeze-thaw cycles. These changes enhanced complexation with functional groups thereby improving the stability of the passivation effect on lead contamination. © 2025 Chinese Society for Environmental Sciences. All rights reserved.

关键词： “以竹代塑”   双碳   全生物降解竹膜袋   竹制品  

摘要： 在全球环境保护意识日益增强的今天，对可持续包装方案的渴求达到了前所未有的高度，全生物降解竹膜袋作为这一领域的璀璨新星，正展现出其巨大的市场潜力和环境友好价值。本文对全生物降解竹膜袋的发展现状进行了全面审视，深入剖析了其面临的机遇与挑战。特别是在“碳达峰、碳中和”目标的宏观背景下，本文特别聚焦于标准化研究的现状，构建一套全面而科学的全生物降解竹膜袋标准体系，为该产品在全球范围内的广泛应用及其带来的环保效益奠定坚实的理论基础。同时可供“以竹代塑”宣传科普所用，有利于推动建立统一的竹产业相关标准，构建较为完善的“以竹代塑”体系。

关键词： Iron analysis  

摘要： This study focused on the long-term AMD-contaminated paddy soils in the Dabaoshan mining area of Guangdong Province. The distribution characteristics of soil iron phases and iron-bound organic carbon were analysed, combining with high-throughput sequencing to examine the effects of AMD irrigation on soil organic carbon sequestration and the response of soil microbial community structure. The results indicated that: ① AMD irrigation led to soil acidification, with accumulation of iron, sulfur and heavy metals in paddy soils. The contents of TOC in paddy soils showed significant positive correlation with TFe, and OCFe. ② AMD irrigation resulted in decreases of soil microbial abundance and diversity. AMD irrigation led to a decrease in the relative abundance of Geobacter in paddy soils, whereas acid tolerant iron and/or sulfur metabolizing bacteria such as Thiobacillus and Thioifustis became the dominant bacteria in paddy soils with the most heavily AMD pollution. ③ RDA analysis identified Fep, TOC, and TFe were the most crucial factors influencing microbial community structure. In conclusion, AMD irrigation brought dissolved iron into paddy soils which was beneficial to soil organic carbon preservation. In addition, AMD irrigation resulted in the formation of microbial community structure that closely related to AMD pollution gradient, the form and content of iron and carbon. © 2025 Chinese Society for Environmental Sciences. All rights reserved.

关键词： Microbial fuel cells  

摘要： In this study, swine wastewater was treated using constructed wetland-microbial fuel cell (CW-MFC) technology. The pollutant removal efficiency, bioelectricity generation and microbial community structure were evaluated. The results showed that after treated the swine wastewater by the experimental system planted with umbrella grass (PCW-MFC), the average removal efficiencies of NH4+-N, TP and sulfadiazine (SDZ) were increased by approximately 5%, 10%, and 3% respectively, and the output voltage, coulombic efficiency, and maximum power density were recorded as 415.93mV, 49.10%, and 51.12mW/m3, respectively. The relative abundances of Proteobacteria, Bacteroidetes and Firmicutes were increased by umbrella grass, which played a key role in pollutant removal and bioelectricity generation. © 2025 Chinese Society for Environmental Sciences. All rights reserved.