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用过滤、离子交换和光解氧化分离自来水和经铝壶煮沸的饮用水中铝的形态,以石墨炉原子吸收光谱法测定铝的浓度,采用化学平衡模式计算铝的形态分布。实验结果表明:经铝壶煮沸1min的饮用水中颗粒态铝量比自来水降低了3.3倍,可交换态、不可交换有机态、不可交换无机态铝量分别增加了1.4、0.5和1.28倍,可交换态和不可交换无机态是铝的主要存在形态。随着煮沸时间的增加,可交换态、不可交换有机态、不可交换无机态铝量降低并趋于稳定,而颗粒态铝量则不断增大,成为铝的主要存在形态。
The morphology of aluminum in tap water and drinking water boiled by aluminum cans was separated by filtration, ion exchange and photolytic oxidation. The concentration of aluminum was determined by graphite furnace atomic absorption spectrometry. The chemical equilibrium model was used to calculate the morphological distribution of aluminum. The experimental results showed that the amount of particulate aluminum in drinking water boiled for 1 min decreased by 3.3 times than that of tap water, and the exchangeable and non-exchangeable organic matter and the non-exchangeable inorganic aluminum increased by 1.4 and 0.4 respectively. 5 and 1.28 times, exchangeable and non-exchangeable inorganic state is the main form of aluminum. With the increase of boiling time, the exchangeable and non-exchangeable organic forms, the non-exchangeable and non-exchangeable aluminum contents decreased and tended to be stable, while the particulate aluminum content increased continuously and became the main form of aluminum.