A method of coupling adsorption to treat groundwater with high fluoride content
An adsorption treatment and groundwater technology, applied in the field of water treatment, can solve the problems of staying in the stage of publishing papers and laboratory research
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Embodiment 1
[0023] A kind of negative zirconium biosorbent prepared by garlic waste is coupled with magnesium oxide to remove fluoride ions in water. The operation steps are as follows:
[0024] Select the garlic waste to be crushed into granular materials with a particle size of 0.3 mm, add it to 10 liters of water containing 0.05 M concentration of zirconium oxychloride according to the ratio of 20 g / L, stir rapidly at a stirring speed of 150 RPM for 5 hours, and then reduce the stirring speed 50RPM, continue to stir for 15 hours, stop stirring and allow it to settle naturally for 2 hours, it can be found that the supernatant is clear and transparent, and the particles obtained after filtration are washed with water for many times and then dried to obtain garlic biomass loaded with zirconium ions Adsorption defluorination materials;
[0025]Take 10 liters of fluorine-containing groundwater, where the fluorine concentration is 5 mg / L, add dilute sulfuric acid to it, adjust its pH value t...
Embodiment 2
[0029] A kind of operation step that adopts negative zirconium ion exchange resin and magnesia coupling to remove fluoride ion in water is as follows:
[0030] Select the macroporous ion exchange resin D001 type, add it into 10 liters of water containing 0.05 M concentration of zirconium oxychloride according to the ratio of 20g / L, stir rapidly at a stirring speed of 150RPM for 1 hour, then reduce the stirring speed to 50RPM, and continue stirring for 12 After 1 hour, stop stirring and allow it to settle naturally for 0.5 hour, and it can be found that the supernatant is clear and transparent, and the resin obtained after filtering is washed with water for many times and then dried to obtain an ion-exchange resin defluorination material loaded with zirconium ions;
[0031] Take 10 liters of fluorine-containing groundwater, where the fluorine concentration is 5mg / L, add acetic acid to it, adjust its pH to 2.3, then add 30 grams of the above negative zirconium resin particles, st...
Embodiment 3
[0035] A kind of operation step that adopts negative cerium ion exchange resin and magnesium oxide coupling to remove the fluorine ion in water is as follows:
[0036] Select the macroporous ion exchange resin D001 type, add it into 10 liters of water containing 0.06 M concentration of cerium chloride according to the ratio of 20g / L, stir rapidly at a stirring speed of 150RPM for 1 hour, then reduce the stirring speed to 50RPM, and continue stirring for 12 After 1 hour, stop stirring and allow it to settle naturally for 0.5 hour, and it can be found that the supernatant is clear and transparent, and the resin obtained after filtering is washed with water for many times and then dried to obtain an ion-exchange resin defluorination material loaded with cerium ions;
[0037] Take 10 liters of fluorine-containing groundwater, where the fluorine concentration is 5mg / L, add acetic acid to it, adjust its pH value to 2.3, then add 30 grams of the above negative cerium resin particles, ...
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Abstract
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