添加剂在大型石灰石-石膏湿法烟气脱硫系统中的工程应用实验研究

以某公司出品的脱硫添加剂在浙江北仑发电厂的实际工程应用实验为例,对脱硫添加剂在大型湿法烟气脱硫系统的工程应用进行了研究,考察其对脱硫效率的影响及可能带来的经济效益。实验结果表明600 MW容量发电机组配备的脱硫系统在添加剂使用后相似工况下脱硫效率分别可以提升8%,1 000 MW容量发电机组配备的脱硫系统可提升5%左右...     

气相色谱-质谱法测定水中挥发性有机物的测量不确定度评定

根据测量不确定度评定与表示理论,采用气相色谱一质谱法测定水中挥发性有机物。以氯乙烯为例,通过计算和评定,得出当氯乙烯的测量结果为4．99μg／L时,取包含因子k=2（约95％置信概率）,扩展不确定度U=0．96μg／L。该不确定度评定方法在实际工作中具有较强的实用价值。     

硫磺和硫酸亚铁对鸡粪好氧堆肥的保氮效果

利用堆肥反应器控制堆肥条件,研究外源添加剂硫磺和硫酸亚铁在鸡粪好氧堆肥中的保氮效果。结果表明：与无添加剂的对照（CK）比较,堆肥中添加硫磺（T1）对堆肥升温和高温期的维持有一定影响,添加硫酸亚铁（T2）对堆肥升温和高温期的维持均无显著影响,而同时添加硫磺和硫酸亚铁（T3）更有利于高温期的持续,加速有机物的降解。添加硫磺...     

肘部张力对防静电无尘服功能的影响研究

本文模拟并计算了穿着状态下防静电无尘服肘部所受到的张力作用,以确定在穿用过程中服装受到的最大作用力。根据模拟计算结果,对在穿着状态下肘部张力对防静电服功能性的影响进行了实验研究,并对降低服装穿着时张力对性能的不良影响,提出了改进方法和建议。     

防静电无尘服装热湿舒适性研究

本文对舒适状态下的人体的透气透湿要求进行了分析,并且对日前国内外市场上常见的几种典型的防静电织物的透湿透气性能进行了研究。通过研究发现,目前很多防静电无尘织物的透气透湿性能都存在问题。针对这种现状,本文提出一些在不影响防静电无尘织物功能性的前提下织物结构改进的措施。     

Effects of individual ozone exposure on lung function in the elderly: a cross-sectional study in China

The aim of this study was to assess the acute health effects of individual ozone (O₃) exposure on the respiratory system in the elderly. A total of 40 non-smoking elderly volunteers completed personal 24 h of measurement for O₃ and fine particulate matter (PM_2.5). To assess health effects, we measured the pulmonary function and five inflammatory biomarkers in exhaled breath condensate (EBC), including interleukin-2 (IL-2), interferon-γ (IFN-γ), prostaglandin E₂ (PGE₂), and tumor necrosis factor α/β (TNFα/β). We used the generalized additive model to analyze the association between O₃ and these health effects, after adjusting PM_2.5, BMI, and sex as confounders. As a result, we found a negative correlation between O₃ and forced vital capacity (FVC) or forced expiratory volume-one second (FEV1). With the increasing of O₃ by 10 μg/m³, FVC and FEV1 decreased by 0.13 L (95% CI 0.01, 0.26) and 0.11 L (95% CI 0.02, 0.20), respectively. We found no statistical significance between O₃ and biomarkers in EBC. The results suggested that individual 24-h O₃ exposure was associated with decreased pulmonary function in the elderly.

     

太湖蓝藻暴发成因及其富营养化控制

根据近年太湖水质和生物监测资料，结合近年藻类生长趋势和区域污染物人湖状况，探讨近年夏季梅梁湖蓝藻暴发原因，并提出了控制太湖富营养化措施。     

Production disruption management for R/M integrated supply chain using system dynamics methodology

The impacts of production disruption in Remanufacturing/Manufacturing (R/M) integrated supply chain on the sales and the methods of production disruption management were studied. A system dynamics model for the R/M integrated supply chain with production disruption was improved by system dynamics methodology. The numerical examples were shown to illustrate the simulation results. The impacts of different recovery times of production disruption on the sales were presented. In order to mitigate the disruption risks and ensure the sales at the needed sales ratio, the methods for setting multi-echelon inventory levels before the occurring of the production disruption and the methods for making back-up plans after the production disruption occurs were given.     

Thin-layer fine-sand capping of polluted sediments decreases nutrients in overlying water of Wuhan Donghu Lake in China

Environmental Science and Pollution Research - Capping water body sediments with a thin layer of sand is an effective technique to decrease nutrient concentrations in the water column and...     

Effects of juvenile crucian carp (Carassius carassius) removal on submerged macrophyte growth—implications for subtropical shallow lake restoration

Environmental Science and Pollution Research - Rapid expansion of juvenile fish after biomanipulation can delay the successful restoration of submerged macrophytes, leading to a turbid water status...