Method for treating sewage from iron-carbon micro-electrolysis waste and subsequent preparation of catalytic nitro reduction catalyst
A technology of iron-carbon micro-electrolysis and waste, which is applied in the fields of chemical industry and environmental protection. It can solve the problems of large sludge and achieve the effects of high reusability, high adsorption capacity, and convenient magnetic separation and recovery.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0021] The preparation method of the adsorbent: the residue after acid-base activation is mixed with melamine or urea and calcined. The specific reaction conditions are: residue mass (after acid-base activation): melamine mass (urea) = (0.1-1): 5, calcining temperature The temperature is 500-560° C., the calcination time is 3-5 hours, and the calcination procedure is 3-7° C. / min, and the carbon nitride material containing activated carbon particles is prepared. Then mix it with the iron-containing solution extracted before, and co-precipitate with ammonia water to obtain C@C with a porous structure. 3 N 4 @Fe 2 o 3 Adsorbent.
[0022] The method of treating wastewater with adsorbent: the optimal working pH range of the adsorbent is 4-8, and the concentration of antimony-containing wastewater is 50-200mg / L. After shaking at 25-40° C. for 1-4 hours, the adsorbent is recovered by magnetic separation.
[0023] The method of preparing the nitro reduction catalyst from the reco...
Embodiment 1
[0026] In this embodiment, the method of treating sewage by iron-carbon micro-electrolysis waste and subsequently preparing a catalytic nitro reduction catalyst is as follows:
[0027] Preparation of adsorbent: Take 10 g of iron-carbon waste residue produced by iron-carbon micro-electrolysis water treatment method, soak it in NaOH aqueous solution with a concentration of 7.5% (mass), stir at 40°C for about 30 minutes, and suction filter to obtain solid waste residue S1, and use distilled water to Rinse waste residue S1 to neutral. Then soak the iron-carbon waste residue S1 after washing in dilute sulfuric acid with a concentration of 5.5% (volume) for 1 h, settle for 0.5 h to obtain residue H1 and supernatant L1, and transfer the supernatant L1 to another beaker for use. The residue H1 was repeatedly washed with deionized water until near neutral (pH=5-7), and then dried at 80°C. Take 0.1g of dried residue H1, fully mix it with 5g of melamine, put it into a muffle furnace and...
Embodiment 2
[0031] In this embodiment, the method of treating sewage by iron-carbon micro-electrolysis waste and subsequently preparing a catalytic nitro reduction catalyst is as follows:
[0032] Preparation of adsorbent: Take 10 g of iron-carbon waste residue produced by iron-carbon micro-electrolysis water treatment method, soak it with NaOH aqueous solution with a concentration of 5% (mass), stir at 50°C for about 10 minutes, and suction filter to obtain solid waste residue S2. Rinse to neutral. Then soak the iron-carbon waste residue S2 after washing in dilute sulfuric acid with a concentration of 1% (volume) for 0.5h, settle for 2.5h to obtain residue H2 and supernatant L2, and transfer the supernatant L2 to another beaker for use . The residue H2 was washed repeatedly with deionized water until near neutral (pH=5-7), and then dried at 80°C. Take 1g of dried residue H2, mix it fully with 5g of melamine, put it into a muffle furnace and increase the temperature by 7°C / min. After re...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More