| 水温和pH对饮用水中铝形态分布的影响 |
| 摘要点击 2206 全文点击 1358 投稿时间：2008-09-20 修订日期：2008-10-25 |
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| 中文关键词 温度 pH 铝形态 荧光分光光度法 饮用水 |
| 英文关键词 temperature pH aluminum species fluorescence spectrophotometry drinking water |
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| 中文摘要 |
| 铝对输配水系统及人体健康的影响主要与其存在形态有关.本研究采用硫酸铝模拟配水考察了水温和pH对溶液中铝形态分布的影响情况.考察的主要铝形态包括单核铝、溶解铝、悬浮铝和多核铝；采用的形态分析方法为荧光分光光度法.结果表明：当pH=6.5时，悬浮铝为饮用水中铝的主要存在形态，在总铝中的质量分数为62.2%；而当pH>7.0时，单核铝为主要形态，且随反应时间的增加变化不大.各水质条件下的多核铝浓度均较低，且随反应时间的变化也不大.水温对铝形态的影响与pH是一致的，由pOH可将二者统一起来.通过调节pOH可以实现饮用水中铝形态的控制，这将对输配水系统的运行管理及铝毒性控制提供理论依据. |
| 英文摘要 |
| The effects of aluminum on water distribution system and human health are mainly attributable to their presence in drinking water. Laboratory experiments were performed to investigate the influence of temperature and pH on the distribution of aluminum species applying alum synthetic water. Aluminum species studied in the experiments included monomeric aluminum, soluble aluminum, suspended aluminum, and polymeric aluminum, which were determined by fluorescence spectrophotometry method. Results indicated that suspended aluminum was the major species at pH 6.5, occupied about 62.2% in the total aluminum mass concentration. While at pH above 7.0, monomeric aluminum was the major species; and varied little as reaction time increased. Polymeric aluminum mass concentration was low at studied water quality condition and also varied little as reaction time increased. The influence of temperature on aluminum species distribution was similar to solution pH; and both could be explained by pOH. Aluminum species in drinking water could be controlled by adjusting the pOH value, which provided theoretical guidance for the operation of the water distribution system and aluminum toxicity control. |
