Results 31 to 40 of about 10,916 (163)
Shuitu Baochi Xuebao, 2011 通过野外采样与室内实验分析煤矸石重金属的释放活性,并利用潜在生态风险评价法分析煤矸石山周边土壤污染及其潜在生态风险特征。结果表明,实验用煤矸石中重金属主要以残渣态存在,Cu、Zn、Pb、Cr和Cd的残渣态分别占其总量的56.86%,53.27%,72.01%,68.61%和75.93%,不易发生释放迁移,但少量酸溶态和氧化物结合态重金属易被淋溶后在矸石山周围土壤中累积并造成重金属污染。煤矸石山周边土壤重金属含量随着距离的增加呈现减少趋势,表明周边土壤受到煤矸石重金属污染,并且在土壤表层重金属含量最高 ...
张明亮, 岳兴玲, 杨淑英
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Shuitu Baochi Xuebao, 2020 基于2018年7月采集的大樟溪下游沿线湿地表层沉积物样品，探讨了6种重金属（Pb、Cr、Cu、Zn、Ni、Cd）的沿程分布特征，并运用地累积指数法（Igeo）和潜在生态风险指数法（RI）对其生态风险进行了评估。结果表明，湿地沉积物中重金属的平均含量整体表现为Zn > Pb > Cr > Cu > Ni > Cd，且其沿程变化较为一致，而这主要取决于沉积物粒度组成、磁学参数、pH、EC和有机质的沿程分布。湿地沉积物中的6种重金属含量均于桃花洲、耕櫵亭 ...
分布特征及生态风险评价李亚瑾 +5 more
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Toxicity and Bioaccumulation of Hexabromocyclododecane (HBCD) in Tigriopus japonicus [PDF]
, 2015 六溴环十二烷（Hexabromocyclododecane，HBCD，C12H18Br6）作为全球用量最多的三大溴代阻燃剂之一（另外两种是多溴联苯醚Polybrominateddiphenylethers，PBDEs和四溴双酚ATetrabromobisphenonalA，TBBPA），被广泛应用于纺织材料、电子产品和建筑绝热材料中，具有阻燃效果好、成本低等特点。由于HBCD本身的持久性有机污染物特性及其使用量的不断增加，由它产生的环境问题也逐渐引起科研工作者的关注。2013年5月，HBCD被正式列入 ...
吕冬梅
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Spatio-Temporal Distribution and Ecological Risk Assessment for Herbicide and Its Metabolites in Baima River [PDF]
, 2022 [Objective] The spatio-temporal variations of a typical herbicide (atrazine, ATR) and its degradation products 〔deethylatrazine (DEA) and deisopropylatrazine (DIA)〕 during the crop growing season (June to September) was investigated in order to provide ...
Sun Jiayao +3 more
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Integrative Conservation, Volume 5, Issue 1, Page 125-136, March 2026.We collated detections of the sun bear from new and previously published camera trap studies across its range. We then analysed these detections at two different spatial scales to assess the habitat associations and diel activity of this species. We found that the sun bear is tolerant to moderate habitat disturbances. ABSTRACT Degraded tropical forests,
Alexander Hendry +5 more
wiley +1 more source
Ecological effect of urban spatial expansion in river valleys: A case study in the main urban area of Lanzhou City [PDF]
, 2023 [Objective] The ecological effect of urban spatial expansion is the key problem of human-environment relationship in the process of urbanization. It is of great significance to explore the complex scientific problem of ecological effect caused by urban ...
WANG Ziyang, SHI Peiji, SHI Jing, ZHANG Xuebin, LIU Yue
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Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Spatial segregation in at‐sea distribution is frequently observed in seabirds and can have important implications for conservation and management. Globally, many albatross and petrel populations are declining due to bycatch in fisheries. In South Georgia, the decrease in wandering albatrosses (Diomedea exulans) differs among breeding sites ...
V. Warwick‐Evans +3 more
wiley +1 more source
Contribution of microcosm experiments to conservation science
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Microcosms, or miniature experimental systems, have been used to develop models and theories in ecology. However, their contribution to conservation science is unclear. We explored the application, design, and impact of microcosms in conservation science from 469 systematically identified articles published from 1986 to 2023.
Eleanor R. Stern +3 more
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Jingshui jishu【目的】拉萨河流域作为拉萨市重要的饮用水水源地，其水质状况对区域生态安全与居民健康具有直接而深远的影响。为全面掌握流域水体中重金属污染状况及潜在生态风险，本文在流域内布设了25个采样点，系统监测了锌(Zn)、锰(Mn)、铜(Cu)、铁(Fe)、砷(As)、铝(Al)、铅(Pb)、铬(Cr)和镍(Ni)共9种典型重金属元素的含量及其空间分布特征。【方法】采用内梅罗综合污染指数法和潜在生态风险指数法对水体重金属的污染水平与生态风险进行量化评估 ...
Wang Xiaokan +5 more
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Dianci bileiqi, 2022 雷击配电线路附近产生的雷电感应过电压极易导致线路发生闪络，需要合理计算线路绝缘闪络风险。本研究根据理论推导线路雷电感应电过压峰值概率密度函数，利用LIOV软件产生感应过电压数据拟合概率密度函数公式，考虑线路绝缘闪络的随机过程和线路交流电压的影响，求取线路雷电感应过电压绝缘闪络风险。研究结果表明：线路雷电感应过电压峰值随着雷电流幅值的增加、雷击点距线路垂直距离的减小而增大；线路雷电感应过电压峰值概率密度区间分布较好地服从对数正态分布特征；线路发生单相闪络 ...
万忠兵 +4 more
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