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961.
煤矿环境噪声对居民健康影响的调查 总被引:2,自引:0,他引:2
参照国家环境噪声标准,在西山官地矿,选择了噪声在50dB(A)以下两类居民区,对16岁上的居民选256名为本次调查对象。监测结果,户外最75dB(A),均超过国家规定标准。在50dB(A)以上的环境下生活、工作和学习的居民神经系统和听力均有不同程度的损伤,而且损伤程度与居住年限有密切关系。神衰阳性率10年以上者,50dB(A)以上34.28%,50dB(A)以下为13.55%。语频听损检出率50d 相似文献
962.
火灾预防与控制技术实施中成本与效益的研究 总被引:6,自引:0,他引:6
用经济学的基本理论与方法分析了方法技术实施中成本与效益的关系,重点研究了合理投资及最佳投资的确定原理与方法,为人们综合考虑的防火投资的经济效益和系统的安全性提供了一个理论指导。 相似文献
963.
964.
965.
室内空气污染危害及其净化技术研究进展 总被引:1,自引:0,他引:1
随着中国居民居住条件的不断改善,室内空气污染已成为重要的环境问题得到越来越多的关注.分析了室内空气污染物的主要来源、种类及其对人体健康的主要危害,对国内外室内空气污染净化技术按照作用原理进行了归纳,分析了不同方法的优缺点.最后展望了室内空气污染净化技术的发展前景. 相似文献
966.
967.
为研究长江岳阳段水环境污染对人体健康产生的危害风险,根据2008-2012年长江岳阳段水质监测数据,采用美国环境保护署(USEPA)推荐的水环境健康风险评价模型,对长江岳阳段通过饮用水途径引起的水环境健康风险进行了评价。结果表明:总健康风险在1.64×10-5~2.25×10-5a-1之间,平均为1.91×10-5a-1,均低于国际辐射防护委员会(ICRP)推荐的最大可接受风险水平5×10-5a-1,对照水环境健康风险等级划分标准,长江岳阳段水环境健康风险为较低健康风险;化学致癌物质健康风险AsCd、平水期丰水期枯水期,非致癌物质健康风险氟化物CuNH3-NZn、枯水期丰水期平水期;总健康风险主要来自化学致癌物质,其中As为主要风险污染物,因此化学致癌物质尤其是As应作为风险决策管理的重点对象。 相似文献
968.
969.
Groundwater is a basic source of drinking water supply for urban and rural areas. This is especially the case for communities located in arid and semi-arid regions that rely on groundwater for drinking purposes. The present study set out to assess the potential health impacts of water impurities and to investigate the qualitative status of drinking water in Robat Karim rural areas, located in southwest Tehran, Iran. A total of 66 samples were collected from the water distribution network of 11 villages (33 sampling points, on two occasions) during September 2020 and were tested in terms of the most common quality parameters such as pH, mercury (Hg), lead (Pb), copper (Cu), zinc (Zn), chloride (Cl–), chlorate (ClO3–), nitrite (NO2–), nitrate (NO3–), and flouride (F–). Multiple methods and indexes including water quality index (WQI), hazard quotient (HQ), and hazard index (HI), were worked out to assess the quality of water and health risk assessment of NO3– Pb2+ and Hg2+. The results revealed that 33% and 90% of sampling sites have significantly high nitrate and total hardness (TH) concentrations, exceeding the maximum permissible limits set by World Health Organization (WHO; 50 and 200 mg/L, respectively). Furthermore, five sampling points exhibited poor WQIs mainly related to NO3– and TH. HQ values higher than 1 for nitrate were noticed in most sampling locations. Except for one sampling point, the HQ obtained for Pb2+ and Hg2+ were below 1 indicating no obvious health hazard. This study represents that children and infants are at higher risk of chronic toxicity by excess NO3– intake. The health hazard that is yet imposed on the community by NO3– necessitates regular monitoring of drinking water, the use of advanced technologies to purify water or otherwise alternative resources should be proposed. 相似文献
970.
Although investigation of microplastics (MPs) present in air environment has been intensively carried out, quantification, characteristics, and distribution of MPs released from the waste burning furnace (WBF) has been missing in literature. The aim of this study was to characterize the presence of MPs released from WBFs and analyze their associated health impacts. The examined locations were at two WBFs (nominated as TPS1 and TPS2) in Sidoarjo, Indonesia. MPs were collected using a 9 cm diameter glass beaker for a period of 8 h at two different sampling points, which are 3 and 15 m from each WBF. Several characteristics of MPs in terms of the number of particles, size, shape, color, and polymer type were comprehensively characterized. This study found that the obtained MPs were of fiber type and in the range of 46–77 and 41–59 particles at TPS1 and TPS2, respectively. In general, the polymer types of MPs were, respectively, cellophane and polytetrafluoroethylene at TPS1 and TPS2. Moreover, it was estimated that about 1.9–2.3 MPs can enter the human body via inhalation. This study offers a pilot examination of MPs released from WBF and findings from this study are crucial to provide new knowledge as a basis to carefully regulate the use of WBF particularly that are located closely to local community. 相似文献