铝壶煮沸的饮用水中铝的形态分析

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的饮用水中颗凿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２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

Analyses and Studies of Aluminum Speciation in the Water Boiled with Aluminum Kettle

The speciation of aluminum in tap water and the boiled water in aluminum kettle were separated by filtration, ion exchange and photooxidation procedures. The concentrations of aluminum speciation were determined by graphite furnace atomic absorption spectrometry and the distribution of those in water was calculated with a chemical equilibrium model. Experiment results showed that in the water boiled for 1 min in aluminum kettle, the concentration of particulate state Al decreased 3.3 fold,exchangeable Al, nonexchangeable organic Al and nonexchangable inorganic Al increased in 1. 4, 0. 5 and 1 .28 fold, respectively, compared with the speciation of aluminum in tap water. Exchangeable Al and nonexchangable inorganic Al were main existent forms of aluminum. With the increase of boiling time, exchangeable Al, nonexchageable orgauic Al and nonexchageable inorganic Al decreased and then hardly changed, particulate Al increased constantly and became to the main existent form of aluminum.