Nano-manganese dioxide for removing underground water heavy metal pollution and preparation method of nano-manganese dioxide for removing underground water heavy metal pollution
A technology of nano-manganese dioxide and heavy metals, applied in biochemical equipment and methods, methods based on microorganisms, microorganisms, etc., can solve problems such as pollution, complex processes, and high equipment requirements, so as to prolong service life and enhance oxidation and adsorption effect of ability
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Embodiment 1
[0037]Inoculate the sterilized microbial growth medium with Leptothrixdiscophora SS-1 and culture at 25°C for 18 hours. Then the obtained mixture was subjected to high-speed centrifugation to obtain bacterial cells, and the precipitated bacterial cells were washed twice with sterile water. The obtained bacteria were inoculated into sterilized manganese oxide medium, in which the acid hydrolyzed casein was sterilized separately at 115°C at low temperature, and the glucose and HEPES were sterilized through a 0.22 μm filter membrane. After culturing at 25°C for 4 hours, add MnCl filtered through a 0.22 μm membrane 2 Make it to a concentration of 10mM and pass through the Na 3 VO 4 Make the concentration 5mM. Cultivate at 28°C for 18 hours to obtain a black precipitate which is the nano-manganese dioxide material.
[0038] 0.2g of the prepared manganese dioxide material was used to remediate 400ml of groundwater with an As(III) concentration of 1mg / L. By detecting and analyzi...
Embodiment 2
[0040] The mixed cells of Pseudomonas putida MnB1 and Bacillus sp SG-1 were inoculated into the sterilized microbial growth medium, and cultured at 30°C for 28 hours. Then the obtained mixture was subjected to high-speed centrifugation to obtain bacterial cells, and the precipitated bacterial cells were washed with sterile water for 3 times. The obtained bacteria were inoculated into sterilized manganese oxide medium, in which the acid hydrolyzed casein was sterilized separately at 115°C at low temperature, and the glucose and HEPES were sterilized through a 0.22 μm filter membrane. After culturing at 30°C for 8 hours, add MnCl filtered through a 0.22 μm membrane 2 Make its concentration 60mM and pass through 0.22μm filter Na 3 VO 4 The concentration was made 10 mM. Cultivate at 30°C for 24 hours to obtain a black precipitate which is the nano-manganese dioxide material.
[0041] 0.5g of the prepared manganese dioxide material was used to remediate 400ml of groundwater who...
Embodiment 3
[0043] Bacillus sp (Bacillus sp) SG-1 was inoculated into the sterilized microbial growth medium, and cultured at 28° C. for 22 hours. Then the obtained mixture was subjected to high-speed centrifugation to obtain bacterial cells, and the precipitated bacterial cells were washed with sterile water for 3 times. The obtained bacteria were inoculated into sterilized manganese oxide medium, in which the acid hydrolyzed casein was sterilized separately at 115°C at low temperature, and the glucose and HEPES were sterilized through a 0.22 μm filter membrane. After culturing at 28°C for 6 hours, add MnCl filtered through a 0.22 μm membrane 2 Make its concentration 40mM and pass through 0.22μm Na 3 VO 4 Make the concentration 8mM. Cultivate at 30°C for 22 hours to obtain a black precipitate which is the nano-manganese dioxide material.
[0044] 0.3g of the prepared manganese dioxide material was used to remediate 400ml of groundwater with a Pb(II) concentration of 40mg / L. After 20...
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