Abstract
The formaldehyde purification effect of diatom mud in the experimental box under sunny and cloudy conditions was tested for 24 h. The influence of light intensity, temperature, relative humidity and initial formaldehyde concentration on the purification effect was studied by the control variable method. The results showed that the formaldehyde purification rate of diatom mud containing nano-TiO2 was 64.5% at temperature 25 °C and sunny conditions for 24 h. The higher the temperature, relative humidity and light intensity, the better the formaldehyde purifying effect. The higher the initial formaldehyde concentration, the longer it took to purify formaldehyde.
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