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451.
Environmental Science and Pollution Research - Photoperoxidation (UV/H2O2) was used to degrade three of the worldwide most consumed antidepressant pharmaceuticals—bupropion, escitalopram, and...  相似文献   
452.
Environmental Science and Pollution Research - There is increasing interest in understanding the role of air pollution as one of the greatest threats to human health worldwide. Nine of 10...  相似文献   
453.
为探讨利用国产HJ卫星遥感数据进行农作物种植面积估算及农业气象灾害定量监测评估的可行性,以江汉平原南部县市为研究区,利用2011年6景不同时相的HJ卫星CCD遥感数据,结合野外调查样方点和面积较大的试验基地样本,通过分析研究区主要秋收作物(棉花、一季中稻)不同生育期的光谱特征和归一化植被指数(NDVI)时序变化特征,对分类影像进行序列阈值分割、掩膜处理,最后利用决策树算法成功提取了棉花和一季中稻的种植面积,得到面积精度和样本点精度均大于90%,Kappa系数为0983 5的结果。只要不受到云和降水的影响,能获取江汉平原区域关键时相(5月中下旬、6月上旬、7月上旬、7月下旬或8月上中旬、10月上旬)HJ 卫星CCD影像数据,便能很好地应用于江汉平原棉花和中稻作物提取  相似文献   
454.
Environmental Fluid Mechanics - For centuries, the interaction between the transport and hydrographic networks represents a significant issue in a country such as France. For example, the French...  相似文献   
455.
To enlarge the possibilities of using organisms of the soil fauna to assess the bioaccumulative potential of chemicals, the kinetic of soil cadmium (Cd) transfer to the terrestrial gastropod Helix aspersa was investigated under laboratory conditions during a long-term experiment (6 months). During the exposure phase (3 months), juvenile snails were subjected to three different concentrations of Cd spiked in artificial ISO soil (ISO 0, 20 and 100 mg Cd kg(-1)) and to a field soil (ME4) industrially contaminated by 20 mg Cd kg (-1). For both soils, internal steady-state Cd concentrations were reached in the viscera of the snails, the main storage organ for Cd, after 2 weeks of exposure whatever the Cd concentration in soil. The equilibrium concentrations in the viscera were 0.7 (+/-0.1), 11.3 (+/-2.4), 73.3 (+/-4.8) and 6.3 (+/-1.3) mg Cd kg(-1) dry mass for ISO 0, ISO 20, ISO 100 and ME4, respectively. During the depuration phase (3 months), from 0 to 52% of the accumulated Cd in the viscera were removed by excretion or relocation in the foot. However, the snails were not able to depurate down to initial concentrations. Data were modelled by integrating a specific growth rate constant into one-compartment toxicokinetic models. This allowed the calculation of Cd uptake rates that can be used as indicators of metal bioavailability. Since this parameter was found to be lower for snails exposed to the field soil ME4, we concluded that lower Cd bioavailability in this field soil was responsible of the lower transfer to the snails compared to the ISO 20 soil, even though they were polluted to similar extents. Internal validation showed that the toxicokinetic models could be applied for predictive purposes, promising for the development of a bioaccumulation directive for terrestrial environment.  相似文献   
456.
457.
Environmental Science and Pollution Research - This work aims to integrate several hydrogen peroxide (H2O2) activation mechanisms, photolysis (UVC irradiation), chemical electron transfer (TiO2-P25...  相似文献   
458.
Environmental Science and Pollution Research - Triclosan (TCS) is widely used in the production of antibacterial products, being often found in wastewater. Therefore, this study developed new...  相似文献   
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