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Method for treating chemical wastewater by nano particles
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A chemical wastewater and nanoparticle technology, applied in water/sewage treatment, aerobic process treatment, chemical instruments and methods, etc., can solve the problems of high cost, cumbersome steps, low reliability, etc., and achieve lower requirements and strong flocculation , the effect of improving the adsorption efficiency
Inactive Publication Date: 2019-11-12
JILIN JIANZHU UNIVERSITY
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Chemical wastewater treatment is an important part of sewage treatment. The existing chemical wastewater treatment methods have cumbersome steps, high cost and low reliability.
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[0030] The preparation method of nanoparticles in the embodiment of the present invention comprises the following steps:
[0033] (3) adding activated carbon and iron filings, and calcining the obtained product at a temperature of 700° C., with argon as a protective gas, to obtain the nanoparticles.
[0036] Step 1. Pretreat 1 ton of chemical wastewater. First, aerate the chemical wastewater for 30 minutes. Then filter the chemical wastewater. Add sulfuric acid to the pretreated chemical wastewater to adjust the pH of the chemical wastewater. To 4, obtain reaction solution A;
[0037] Step 2, put the nanoparticles into the reaction solution A, add 20kg of 30% H 2 o 2 Solution, react to obtain reaction solution B, the addition of nanoparticles is 5wt% of reaction solution A;
[0038] Step 3, adding calciumcarbideslagslurry to the reaction solution C, adjusting the pH to 8;
[0039] Step 4, set aside to settle, carry out solid-liquid separation, and detect the sewage, and the detection results are shown in Table 1.
[0040]
Embodiment 2
[0042] Step 1. Pretreat 1 ton of chemical wastewater. First, aerate the chemical wastewater for 30 minutes. Then filter the chemical wastewater. Add sulfuric acid to the pretreated chemical wastewater to adjust the pH of the chemical wastewater. To 3, obtain reaction solution A;
[0043] Step 2, put the nanoparticles into the reaction solution A, add 20kg of 30% H 2 o 2Solution, react to obtain reaction solution B, the addition of nanoparticles is 5wt% of reaction solution A;
[0044] Step 3, adding calciumcarbideslagslurry to the reaction solution C, adjusting the pH to 8;
[0045] Step 4, set aside to settle, carry out solid-liquid separation, and detect the sewage, and the detection results are shown in Table 1.
[0046]
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Abstract
The invention discloses a method for treating chemical wastewater by nano particles. The method comprises the following steps: pretreating the chemical wastewater, adding sulfuric acid into the pretreated chemical wastewater, and regulating the pH value of the chemical wastewater to 4 to obtain a reaction solution A; adding the nano particles into the reaction solution A, adding a H2O2 solution with a concentration of 30%, and performing a reaction to obtain a reaction solution B, wherein the adding amount of the nano particles is 5 wt% of the reaction solution A; adding an alkaline substanceinto a reaction solution C, and adjusting the pH value to 8; and allowing the reaction system to stand for precipitation, performing solid-liquid separation, and detecting the sewage to enable the sewage to reach the I-grade discharge standard of Integrated WastewaterDischarge Standard GB8978-1996. The treatment method disclosed by the invention has a high removal rate of COD and ammonianitrogen, and is simple and efficient.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating chemical wastewater by nano particles. Background technique [0002] Chemical wastewater contains toxic or highly toxic substances such as cyanide, phenol, arsenic, mercury, cadmium or lead, which can have toxic effects on organisms and microorganisms at a certain concentration. , Corrosive substances. The concentration of organic matter is high, especially the concentration of various organic acids, alcohols, aldehydes, ketones, ethers and epoxides in petrochemical wastewater will be further oxidized and decomposed in water, consuming a large amount of dissolved oxygen in water, directly affecting aquatic life. biological survival. The pH of chemical wastewater is unstable, and there are many nutrient substances. Wastewater with high phosphorus and nitrogen content will cause eutrophication of the water body, causing algae and microorganisms in the water t...
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