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951.
在对某制药厂鼓风机房现场噪声测量的基础上,对机房的噪声特性和噪声源进行了分析,提出针对噪声特性的吸声和隔声方案.在该方案不能满足要求的情况下提出在电机和鼓风机的基础下面安装弹簧隔振器、使用金属软管进行管道隔振的补充方案.测试表明,补充方案是有效的控制措施,降噪效果明显,能完全满足厂家提出的要求. 相似文献
952.
Weihai Xu Wen Yan Weixia Huang Li Miao Lifeng Zhong 《Environmental geochemistry and health》2014,36(6):1095-1104
A study was conducted to investigate the occurrence and behavior of six endocrine-disrupting chemicals (EDCs) in sewage, river water, and seawater from the Pearl River Delta (PRD). The six EDCs under study were 4-nonylphenol (NP), bisphenol A (BPA), 17α-ethynylestradiol (EE2), estrone (E2), 17β-estradiol (E2), and estriol (E3). These EDCs, predominated by BPA, were found in high levels in the influents and the effluents of sewage treatment plants in the area. The relatively high concentrations (0.23–625 ng/L) of the EDCs detected in the receiving river water suggested that the untreated sewage discharge was a major contributor. The EDCs detected in eight outlets of the Pear River and the Pear River Estuary were in the ranges of 1.2–234 and 0.2–178 ng/L, respectively. The estrogen equivalents in the aquatic environments under study ranged from 0.08 to 4.5 ng/L, with E1 and EE2 being the two predominant contributors. As the fluxes of the EDCs from the PRD region to the nearby ocean are over 500 tons each year, the results of this study point to the potential that Pearl River is a significant source of the EDCs to the local environment there. 相似文献
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Yaru Zhang Jinfeng Bai Jun Xu Xiangyun Zhong Zhenning Zhao Hongchun Liu 《环境科学学报(英文版)》2013,(S1):S190-S195
The stamp-charging coke making process has some advantages of improving the operation environment, decreasing fugitive emission, higher gas collection efficiency as well as less environmental pollution. This article describes the different structure strength and high temperature thermal properties of 4 different types of coke manufactured using a conventional coking process and the stamp-charging coke making process. The 4 kinds of cokes were prepared from the mixture of five feed coals blended by the petrography blending method. The results showed that the structure strength indices of coke prepared using the stamp-charging coke method increase sharply. In contrast with conventional coking process, the stamp-charging process improved the coke strength after reaction but had little impact on the coke reactivity index. 相似文献
955.
Zhong Jie Ma Yancheng Jiang Shaojun Dai Guangling Liu Zhenyuan Shu Yuehong 《Environmental science and pollution research international》2022,29(59):88630-88643
Environmental Science and Pollution Research - Metal-free biochar to activate persulfate and degrade organic contaminants has attracted great attention in advanced oxidation processes, while the... 相似文献
956.
The Western Development Initiative (WDI), launched in 2000 by the Chinese Government, will greatly change the modes and improve the quality of life of the 355 million people living in the western region of China. This paper presents a panoramic picture of the mineral industries under the framework of the WDI. First, it gives an overview of the WDI, including a summary of the favorable and unfavorable conditions for the WDI, the objectives, priorities and key geographical areas for the WDI and the national policies and measures for implementing the WDI. Second, it describes the roles of the mineral industries in the WDI. Finally, it details the policies and actions of the Chinese Government on the exploration and development of mineral resources in the western region in support of the WDI. 相似文献
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959.
A GIS-based decision support system for regional eco-security assessment and its application on the Tibetan Plateau 总被引:1,自引:0,他引:1
Regional eco-security assessment is an intricate, challenging task. In previous studies, the integration of eco-environmental models and geographical information systems (GIS) usually takes two approaches: loose coupling and tight coupling. However, the present study used a full coupling approach to develop a GIS-based regional eco-security assessment decision support system (ESDSS). This was achieved by merging the pressure-state-response (PSR) model and the analytic hierarchy process (AHP) into ArcGIS 9 as a dynamic link library (DLL) using ArcObjects in ArcGIS and Visual Basic for Applications. Such an approach makes it easy to capitalize on the GIS visualization and spatial analysis functions, thereby significantly supporting the dynamic estimation of regional eco-security. A case study is presented for the Tibetan Plateau, known as the world’s “third pole” after the Arctic and Antarctic. Results verified the usefulness and feasibility of the developed method. As a useful tool, the ESDSS can also help local managers to make scientifically-based and effective decisions about Tibetan eco-environmental protection and land use. 相似文献
960.
为加强洪灾研究工作,做好灾前预评估、灾中跟踪评估、灾后详细评估工诈,应用地理信息系统(GIS)技术,建立起海河流域西三洼(东淀洼、文安茬、贾口控)洪灾遥感监测背景信息系统。 相似文献