[Comparative Analysis of NO Emission Characteristics of Non-Ultra-Low- and Ultra-Low-Emission Coal-Fired Power Units During the Start-Up Process].

Based on the NO emission information of 671 coal-fired power units, the NO emission characteristics of non-ultra-low-emission (non-ULE) and ultra-low-emission (ULE) coal-fired power units during the start-up process were compared and analyzed. The results showed that in the start-up stage of non-ULE units, the exceeding standard rate (ESR) of NO emission concentration was 81.53%, the average exceeding standard hours (ESHs) was 2.

[Health risk assessment of heavy metals in drinking water based on field measurement of exposure factors of Chinese people].

This study was carried out in Biyang County, located in the junction of Yangtze river and Huaihe river. Drinking water samples of 20 sites in urban and rural areas in this county were collected to measure 14 heavy metals by ICP/MS. About 2 500 subjects with different age and sex were selected to measure exposure factors.