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In this study, the relationship between fluorine in drinking water and that in urine of urban residents in China is assessed. Fluorine concentrations in tap water and those in urine show a good correlation with a linear regression coefficient of 0. 9798, indicating that the fluorine concentrations in big cities under investigation are extremely low, and the main source of fluorine is tap water. The weather effect on the intake amount of fluorine is also discussed. When air temperature is above 15℃, people would intake more fluorine through drinking water with the rise of air temperature. When temperature is below 15℃, no remarkable relationship is observed between air temperature and the intake amount of fluorine. This phenomenon indicates that the main source of fluorine in China is tap water instead of foodstuff. 相似文献
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加氯水体有机浓集物对团头鲂血液指标的影响 总被引：1，自引：0，他引：1
本文对团头鲂２项血液学指标（红细胞数ＲＢＣ和血红蛋白量Ｈｂ）的正常值进行了研究,同时检测了加氯水体中有机浓集物对这２项指标的影响。结果表明,团头鲂血液中ＲＢＣ和Ｈｂ的正常值受生长和水温等因素影响;在相同的试验条件下,加氯水体中的有机浓集物对团头鲂血液ＲＢＣ和Ｈｂ有抑制作用,抑制率分别为４．３％～２６．０％和５．０％～２２．５％,表明此类物质对鱼类正常的生长代谢有一定的危害。 相似文献
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光激发的臭氧是使用波长低于１８０ｎｍ的光量子激发氧分子（Ｏ２）而产生的，与常规的地臭氧的区别是：光臭氧为呈碱性负离子状态的气流，它的氧化电势为２．６０Ｖ，不呈现氮氧化物，在水中的半衰期超过２ｈ，是极强的氧化剂，其杀菌消毒效果远高于常用消毒剂。它可以一次同时完成杀菌消毒、净化水质和增氧三大任务，而且不产生二次污染，是当前水产养殖中水质消毒净化的理想物质具有极其广泛的推广应用前景。 相似文献
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Shaoyong LU Xiangcan JIN Jianning GUO 《中国地球化学学报》2006,25(B08):257-257
Knowledge of phosphorus （P） variation regularity of sediment-water system has important influence on water pollution. Thus P variation regularity of top-sediment affected by some factors such as type of sediment （sandy and silty）, background value of sediment, P concentration of overlaying water, inhibiter, disinfection, was investigated. The results stated that, （1） P in the sandy sediment occurred mainly in the form of insoluble P. Silty sediment with a low background level has higher dissoluble total phosphorus （DTP） content than silty sediment with a high background level. （2） Low-P primary liquid has low TP and DTP contents, TP in the overlying water was rich in DTP. While TP in overlying water of high P primary liquid was rich in insoluble total phosphorus （ITP）. Overlying water of adding inhibitor set has high TP, dominated by ITP. TP in overlying water of no inhibitor set was dominated by DTP. Adding inhibitor set has obviously high pH value and tallish DO concentration in overlying water than in no inhibitor set. Disinfection set has high Pcontent in overlying water, DTP content is high. DO and ORP in overlying water of non-disinfection set were obviously higher than in that disinfection set. 相似文献
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