Showing 501 - 510 results of 510 for search '"Heilongjiang"', query time: 0.05s Refine Results
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    Fluoride in drinking water and associated non-carcinogenic health risk in Inner Mongolia Autonomous Region, 2022: a monitoring data analysis by Wenqian ZHANG, Jiake ZHU, Wenyu ZHANG, Xinrui JIA, Xuanzhi YUE, Huan LI, Duoduo WU, Yuhan QIN, Yaochun FAN

    Published 2024-11-01
    “…There were significant differences in fluoride content and associated non-cancer health risk for samples collected from different river basins (H = 648.781,P < 0.001); the fluoride content and associated non-cancer health risk (HQ = 0.40) were the highest for samples from the Liaohe River basin, followed by those from the basins of some inner rivers (0.37), Haihe River basin (0.36), Yellow River basin (0.26), and Heilongjiang River basin (0.24), respectively. The qualification rate (fluoride content lower than the national standard of ≤1.0 mg/L) of water samples from urban areas was higher than that from rural areas (95.96% vs. 89.58%, χ2 = 87.077; P < 0.001), and the qualification rate of groundwater samples was higher than that of surface water samples (99.72% vs. 91.23%, χ2 = 32.146; P < 0.001); both the fluoride content and the associated non-cancer health risk of surface water samples were lower than those of groundwater (0.340 mg/L vs. 0.500 mg/L, 0.21 vs. 0.31, Z = – 11.761; P < 0.001). …”
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    Gas drainage and utilization in coal mines in China: History, technological advances, and prospects by Guofu LI, Chao LI, Bichuan ZHANG, Yun XU, Zheng WANG, Xianjun ZHOU

    Published 2025-01-01
    “…From the 1960s to the 1970s, gas pumping while mining was used for the prevention and control of gas overrun and accidents in the Jixi and Shuicheng mining areas in Heilongjiang and Guizhou provinces, respectively, achieving encouraging results. …”
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