Method for removing toxic heavy metal in water with modified nanometer titanium dioxide particle
A nano-titanium dioxide and heavy metal technology is applied in the field of lead, cadmium, toxic heavy metals, and efficient removal of copper in water bodies, achieving the effects of high practicability, economical operation, and huge adsorption capacity.
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Embodiment 1
[0009] First, put 20 g / ton of nano-titanium dioxide modified particles into the water body polluted by toxic heavy metals (including electroplating wastewater); then, fully mix the input nano-titanium dioxide modified particles with the polluted water for 30 minutes, and precipitate 2 Hours, after sedimentation, the treated sewage in the pool is discharged, leaving the nano-titanium dioxide modified particles adsorbed with toxic heavy metals; finally, the nano-titanium dioxide modified particles adsorbed with toxic heavy metals are transferred to the recovery pool, and added to the recovery pool 2mol / L hydrochloric acid solution, the volume ratio of hydrochloric acid solution to precipitate is 1:1; recover the toxic heavy metals desorbed from nano titanium dioxide modified particles.
[0010] The experimental results show that after precipitation, the concentration of copper, lead and cadmium in the raw water has been lower than the detection limit of the atomic absorption spec...
Embodiment 2
[0012] First, put 100 g / ton of nano-titanium dioxide modified particles into the water polluted by toxic heavy metals; then, fully mix the input nano-titanium dioxide modified particles with the polluted water for 60 minutes, and settle for 3 hours. The treated sewage in the pool is discharged, leaving the nano-titanium dioxide modified particles adsorbed with toxic heavy metals; finally, the nano-titanium dioxide modified particles adsorbed with toxic heavy metals are transferred to the recovery pool, and 6 mol / L of Hydrochloric acid solution, the volume ratio of hydrochloric acid solution to precipitate is 1:1; recover toxic heavy metals desorbed from nano titanium dioxide modified particles.
[0013] The experimental results show that after precipitation, the concentration of copper, lead and cadmium in the raw water has been lower than the detection limit of the atomic absorption spectrometer, which proves that the copper, lead and cadmium in the raw water have been complet...
Embodiment 3
[0015] First, put 60 g / ton of nano-titanium dioxide modified particles into the water polluted by toxic heavy metals; then, fully mix the input nano-titanium dioxide modified particles with the polluted water for 40 minutes, and settle for 3 hours. The treated sewage in the pool is discharged, leaving the nano-titanium dioxide modified particles adsorbed with toxic heavy metals; finally, the nano-titanium dioxide modified particles adsorbed with toxic heavy metals are transferred to the recovery pool, and 4 mol / L of Hydrochloric acid solution, the volume ratio of hydrochloric acid solution to precipitate is 1:1; recover toxic heavy metals desorbed from nano titanium dioxide modified particles.
[0016] The experimental results show that after precipitation, the concentration of copper, lead and cadmium in the raw water has been lower than the detection limit of the atomic absorption spectrometer, which proves that the copper, lead and cadmium in the raw water have been complete...
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