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911.
为有效降低石化火灾造成的损失,提高石化火灾灭火救援效率,本文在深入剖析石化火灾特点的基础上,针对企业本身提出了夯实应急救援准备、把握灭火原则、强化自身灭火能力建设等建议.针对现场救援存在的问题提出了力量调集充足、安全防护到位、装备配置精良和战勤保障充足等关键对策,为高效、安全地扑灭石化火灾提供指导. 相似文献
912.
Manganese ion (Mn2+) generated from metallurgical, steel making and chemical industries enters sewage treatment plants and affects the sludge activity and flocculation. The effect of Mn2+ on the removal of chemical oxygen demand (COD) and total phosphorus (TP) and sludge activity were investigated in anoxic zone of an anaerobic/anoxic/oxic (A2O) process. The compositions and structures of extracellular polymeric substances (EPS) were characterized using three-dimensional excitation emission matrix fluorescence spectroscopy (3D-EEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) to reveal the relationship among Mn2+, EPS and sludge flocculation.The results showed that low concentration of Mn2+ (<5 mg/L) improved removal efficiencies of COD and TP and increased the activity of alkaline phosphatase, acid phosphatase and dehydrogenase. Meanwhile, the addition of Mn2+ increased total EPS, sludge contact angle, Zeta potential and sludge particle size, and thus enhanced sludge flocculation. However, high concentration of Mn2+ (>10 mg/L) hindered microbial flocculation and reduced removal efficiencies of the pollutants. When Mn2+was 5 mg/L, removal efficiencies of COD and TP reached 65% and 90%, respectively. Sludge flocculation was the best and SVI was 70.56 mL/g. The changes of Mn2+ concentration caused deviation of groups’ compositions in LB-EPS and TB-EPS, where the main components were always protein (PN) and polysaccharide (PS). The addition of Mn2+ resulted in the degradation of humic acids. However, it did not give rise to significant morphology changes of EPS. 相似文献
913.
Xie Yong Zuo Qingsong Guan Qingwu Wei Kexiang Zhang Bin 《Environmental science and pollution research international》2022,29(17):25029-25045
Environmental Science and Pollution Research - Improving the NOx conversion efficiency and particulate combustion efficiency under cold-start conditions (low-temperature conditions) is still the... 相似文献
914.
Huang Yu-Qi Zeng Yuan Wang Tao Chen She-Jun Guan Yu-Feng Mai Bi-Xian 《Environmental science and pollution research international》2022,29(25):37737-37747
Environmental Science and Pollution Research - Plasticizers are ubiquitous pollutants in the environment, whereas few efforts have been made to elucidate their emission sources in the atmosphere.... 相似文献
915.
Liu Anchen Lin Wenting Ping Senwen Guan Wenqi Hu Ningyi Zheng Sichun Ren Yuan 《Environmental science and pollution research international》2022,29(29):43984-44002
Environmental Science and Pollution Research - Antihistamines (ANTs) are medicines to treat allergic diseases. They have been frequently detected in the natural water environment, posing potential... 相似文献
916.
随着经济快速发展,工业固废、非正规垃圾、未覆盖建筑渣土等固体废物急剧增加,对区域生态环境造成极大威胁。固废堆场具有面积小、分布散等特点,目前国内仍缺少针对各类固废堆场的遥感自动识别研究。为此,基于国产高分辨率卫星遥感数据,根据野外实地光谱采集结果,分别开展了未覆盖建筑渣土、工业固废及非正规垃圾的自动识别方法研究,提取研究区各类固废堆场。结果表明:未覆盖建筑渣土在蓝波段与绿波段分别存在"吸收谷"与"反射峰",基于该特征构建的比值指数模型,结合直方图双峰法阈值分割可以有效提取未覆盖建筑渣土区域;工业固废、非正规垃圾2种固废类型多样,光谱反射率没有明显规律,结合其纹理、色调等特征,采用面向对象多尺度分割、支持向量机监督分类方法能够较好地识别2种类型固废;基于自动化提取技术并结合人机交互判读方法,提取的研究区未覆盖建筑渣土、工业固废及非正规垃圾等3种固废堆场的精度分别达到96.83%、88.26%、85.71%,各类固体废物遥感识别精度较高,极大提高了固废监测效率。 相似文献
917.
Wang Jin Han Ping Zhang Yanhua Li Jinyu Xu Linxu Shen Xue Yang Zhigang Xu Sisi Li Guangxue Chen Feiyong 《Environmental science and pollution research international》2022,29(25):37315-37326
Environmental Science and Pollution Research - The reserve of Tamarix forest, located in Changyi, China, is the only national marine special reserve taking Tamarix as the main object of protection.... 相似文献
918.
Basit Farwa Liu Jiaxin An Jianyu Chen Min He Can Zhu Xiaobo Li Zhan Hu Jin Guan Yajing 《Environmental science and pollution research international》2022,29(7):10183-10197
Environmental Science and Pollution Research - Brassinosteroids (BRs) are growth-promoting hormones that exhibit high biological activities across various plant species. BRs shield plants against... 相似文献