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活性氧化铝的除砷机理以吸附为主,其除As~(5+)的效率非常显著地高于As~(3+)。水中As~(3+)用氯氧化后的去除率和As~(5+)相同。含砷0.75mg/L左右的原水将pH调至6.0～6.5的条件下,除砷容量为1.4～2.0mg/g Al_2O_3,处理1m3水的化学品费用为0.221元。1m~3 Al_2O_3每个周期可处理水1700m~3以上。
The mechanism of arsenic removal by activated alumina is mainly adsorption, and its efficiency except As ~ (5+) is very significantly higher than that of As ~ (3+). The removal rate of As ~ (3 +) in water after oxidation with chlorine is the same as As ~ (5+). Under the condition that the raw water containing about 0.75mg / L of arsenic has the pH adjusted to 6.0-6.5, the cost of removing arsenic is 1.4-2.0mg / g Al 2 O 3 and the cost of treating 1m 3 water is 0.221 yuan. 1m ~ 3 Al_2O_3 can handle more than 1700m ~ 3 water per cycle.