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Copper ions accelerate fructose-k 2 hpo 4 Product treatment method for chromium-containing wastewater

A technology of -K2HPO4 and copper ions, applied in the field of environmental pollution control, can solve the problems of expensive chemical reduction agents, waste of resources, secondary pollution, etc., and achieve simple and easy-to-control reaction process, efficient treatment and resource recovery, and reaction rate fast effect

Active Publication Date: 2021-10-15
DALIAN UNIV OF TECH
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  • Claims
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Problems solved by technology

However, it is undeniable that this method does not completely remove trivalent chromium, and it still remains in the water body, which has the risk of being re-oxidized to hexavalent chromium, and most chemical reducing agents are expensive, which is easy to cause waste of resources and improper follow-up treatment It may even cause secondary pollution

Method used

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  • Copper ions accelerate fructose-k <sub>2</sub> hpo <sub>4</sub> Product treatment method for chromium-containing wastewater
  • Copper ions accelerate fructose-k <sub>2</sub> hpo <sub>4</sub> Product treatment method for chromium-containing wastewater
  • Copper ions accelerate fructose-k <sub>2</sub> hpo <sub>4</sub> Product treatment method for chromium-containing wastewater

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Embodiment 1

[0033] This embodiment discloses a copper ion accelerated fructose-K 2 HPO 4 The method of product treatment chromium-containing wastewater, such as Image 6 As shown, the steps are as follows:

[0034] 1. Prepare simulated wastewater with a Cr(VI) concentration of 52mg / L

[0035] 0.368g K 2 Cr 2 o 7 Dissolve in 5mL deionized water to make the concentration of Cr(VI) mother liquor be 26g / L; 0.085gCuCl 2 Be dissolved in 5mL deionized water, make the concentration of Cu(II) mother liquor be 6.35g / L; 3g K 2 HPO 4Dissolve in 20mL deionized water so that K 2 HPO 4 The concentration of mother liquor is 150g / L; Add 0.2g fructose and 200μL K to 20mL of deionized water 2 HPO 4 , reacted at 121°C for 20 min, and after cooling to room temperature, 40 μL of Cr(VI) mother liquor and 20 μL of Cu(II) mother liquor were added to prepare simulated wastewater. Simulated wastewater contains 1% fructose, 1.5g / L K 2 HPO 4 , 52mg / L of Cr(VI) and 6.35mg / L of Cu(II)

[0036] 2. Measuri...

Embodiment 2

[0039] 1. Measuring Fructose-K 2 HPO 4 Reduction effect of thermal reaction products on Cr(VI) in real wastewater

[0040] The real wastewater is coking wastewater from a steel plant. Its basic water quality parameters are as follows: COD 300mg / L, volatile phenol 30mg / L, conductivity 5000μS / cm, total salinity 2600, pH 7.9. Add 0.2 g fructose and 200 μL K to 20 mL of wastewater 2 HPO 4 , reacted at 121° C. for 20 min, and added 40 μL of Cr(VI) mother liquor and 20 μL of Cu(II) mother liquor after cooling to room temperature. Real wastewater contains 1% fructose, 1.5g / L of K 2 HPO 4 , 52mg / L of Cr(VI) and 6.35mg / L of Cu(II) and various organic compounds. Also take 1mL of real wastewater and mix it with 1mL of Cr(VI) chromogen, measure the absorbance value at a wavelength of 540nm with a spectrophotometer, and then measure it every 0.5h. The Cr(VI) concentration was calculated using the standard curve to obtain the reduction efficiency of Cr(VI). Experimental results such...

Embodiment 3

[0048] Removal of Organic Trivalent Chromium and Cu(II) from Treated Wastewater by Mn(II)

[0049] 1. Preparation of Mn(II) mother liquor

[0050] 0.9896g of manganese chloride tetrahydrate was dissolved in 5mL of deionized water so that the concentration of Mn(II) was 54.9g / L.

[0051] 2. Research on the removal of organic trivalent chromium and Cu(II) in treated wastewater by Mn(II)

[0052] Add 100 μL of Mn(II) mother liquor to the 20mL wastewater system, so that the concentration of Mn(II) in the system is 137.3mg / L, and wait for Mn(II) to react with organic trivalent chromium and Cu(II) in the wastewater for 10min, Samples were taken at 20min, 2h, 6h, and 12h, and the solution was centrifuged for 10min at a speed of 5000r / min, and the supernatant was taken to measure the Cr(VI) concentration, total chromium concentration and total copper concentration respectively. Measured in the same way as before, the concentrations of total chromium and total copper were measured by...

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Abstract

The invention provides a copper ion accelerated fructose-K 2 HPO 4 The method for product processing chromium-containing wastewater comprises the following steps: Step 1, fructose and K 2 HPO 4 React at 90-150°C for 0.1-2h to generate a reducing compound preparation; Step 2, mix industrial wastewater containing hexavalent chromium ions, reducing compound preparation and Cu(II), and react for 0.5-12h; Step 3, in Divalent manganese ions are added to the waste water treated in the second step, and react for a certain period of time, so that organic trivalent chromium and Cu(II) are precipitated, and the metal precipitates are removed by filtration. Copper Ion Accelerated Fructose‑K 2 HPO 4 The method for treating chromium-containing wastewater by the product can efficiently remove chromium ions.

Description

technical field [0001] The invention relates to environmental pollution control technology, in particular to a copper ion accelerated fructose-K 2 HPO 4 The product is a method for treating chromium-containing wastewater. Background technique [0002] Due to the extensive use of chromium in the chemical industry, electronics, leather tanning, electroplating and other industries, the chromium-containing pollutants in the environment have increased sharply. Among them, hexavalent chromium is more harmful to the environment and human beings due to its characteristics of high toxicity, wide migration range, and difficult precipitation. big. my country's "Comprehensive Wastewater Discharge Standard" stipulates that the content of hexavalent chromium in industrial discharges should not exceed 0.5mg / L, and the content of total chromium including trivalent chromium should not exceed 1.5mg / L. Therefore, how to find a fast and effective method to remove hexavalent chromium and tota...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/70C02F101/22
CPCC02F1/70C02F2101/22
Inventor 周豪杨重徐天怡刘奕含占敬敬柳丽芬
Owner DALIAN UNIV OF TECH
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