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Application of treating chromate-containing wastewater based on cupric ion-yeast extract powder compound preparation

A technology of yeast extract powder and compound preparation, which is applied in the field of environmental pollution control and achieves a good application prospect

Inactive Publication Date: 2019-01-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cell membrane is selectively permeable to dichromate, which to some extent inhibits the rate of this reduction reaction

Method used

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  • Application of treating chromate-containing wastewater based on cupric ion-yeast extract powder compound preparation
  • Application of treating chromate-containing wastewater based on cupric ion-yeast extract powder compound preparation
  • Application of treating chromate-containing wastewater based on cupric ion-yeast extract powder compound preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Effect of different concentrations of Cu(II) on the removal rate of Cr(VI)

[0035] 1. Preparation of Cr(VI) mother liquor and Cu(II) mother liquor and Cr(VI) chromogen

[0036] 0.368g K 2 Cr 2 o 7 Dissolve in 5mL deionized water to make its Cr(VI) concentration 26g L -1 ; 0.085gCuCl 2 Dissolve in 5mL deionized water so that the Cu(II) concentration is 6.35g L -1 ; Dissolve 0.2g diphenylcarbazide in 50mL acetone, then settle to 100mL with deionized water, dilute concentrated sulfuric acid and concentrated phosphoric acid with deionized water in a ratio of 1:1 respectively, acetone solution: dilute sulfuric acid : Dilute phosphoric acid is mixed at a ratio of 4:1:1 to be Cr(VI) developer.

[0037] 2. Preparation of systems with different concentrations of Cu(II)

[0038] Take 0.6g of yeast extract powder and dissolve it in 120ml of deionized water, shake it well and divide the solution into 6 equal parts, each 20mL. Add 4 μL of Cr(VI) mother solution to each solu...

Embodiment 2

[0042] Effects of Different Concentrations of Yeast Extract Powder on the Removal Rate of Cr(VI)

[0043] 1. Prepare a system with different concentrations of yeast extract powder

[0044] Take six 50mL Erlenmeyer flasks and add 20ml of deionized water to each, and then add 0, 0.02, 0.04, 0.1, 0.2, 0.4g of yeast extract powder to make the concentration 0, 1, 2, 5, 10, 20g·L -1 . Then add 20 μL of Cu(II) and 4 μL of Cr(VI) mother solution so that the concentrations of Cu(II) and Cr(VI) are 6.35 and 5.2 mg·L, respectively -1 .

[0045] 2. Study the removal rate of Cr(VI) in Cu-yeast extract powder system with different concentrations of yeast extract powder

[0046] Take 1ml of the prepared solution and mix it with 1ml of Cr(VI) chromogen, measure the absorbance value with a spectrophotometer at a wavelength of 540nm, and then measure it every 3h. The Cr(VI) concentration was calculated using the standard curve to obtain the Cr(VI) removal rate. Experimental results such as...

Embodiment 3

[0048] Effect of Common Cations on Cr(VI) Removal Rate

[0049] 1. Preparation of Mn 2+ 、Co 2+ , Zn 2+ , Fe 3+ 、Ni 2+ , NH 4 + mother liquor

[0050] Dissolve 0.063g of manganese chloride, 0.065g of cobalt chloride, 0.068g of zinc chloride, 0.081g of ferric chloride, 0.065g of nickel chloride, and 0.027g of ammonium chloride in 5mL of deionized water to make Mn 2+ 、Co 2+ , Zn 2+ , Fe 3+ 、Ni 2+ , NH 4 + The concentration is 5.49, 5.89, 6.54, 5.58, 5.87, 1.8g L -1 .

[0051] 2. Preparation of Cu-yeast extract powder system with coexistence of different cations

[0052] Take 2.8g of yeast extract powder and dissolve it in 140mL deionized water so that the concentration of yeast extract powder is 20g L -1 , Shake to mix and divide the solution into 7 equal parts. 20 μL of Cr(VI) and Cu(II) mother solutions were added to each solution so that the final concentrations of the two were 26 mg·L -1 and 6.35mg·L -1 . Add 20 μL of Mn to each of the 6 solutions with a p...

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Abstract

The invention provides an application of treating chromate-containing wastewater based on a cupric ion-yeast extract powder compound preparation. According to the method, yeast extract powder is takenas a reducing agent of hexavalent chromium ions and cupric ions are served as a catalyst for reduction reaction of hexavalent chromium ions, for effectively treating different types of chromate-containing wastewater. Sodium hydroxide can be added for precipitating and collecting trivalent chromium substances generated according to the method; or wastewater is further settled for supporting growthand reproduction of natural microorganisms in wastewater; organic trivalent chromium can be absorbed to the surface of bacteria or taken into bacteria, so as to prepare a chromium additive applied tofeed industry; the generated biomass-organic trivalent chromium compound can be calcined under high temperature so as to remove biomass and generate a chromic oxide catalyst. The catalytic system according to the invention is high in performance stability and is capable of effectively treating and recycling hexavalent chromium wastewater in different concentrations under various conditions of strong acidity, coexistence of other metal ions, and the like. The preparation is low in cost and has an excellent industrialized application prospect.

Description

technical field [0001] The invention belongs to the field of environmental pollution control, and in particular relates to an application for treating chromium-containing wastewater based on a copper ion-yeast extract powder composite preparation. Background technique [0002] With the rapid economic development, a variety of heavy metals are widely used in different industrial fields. Wastewater containing these metals enters the environment and may cause long-term or acute health risks to the human body. Unlike organic pollution, heavy metals cannot be completely degraded and mineralized, but can only be immobilized through adsorption, redox, or other reactions to reduce the environmental risk of specific heavy metals. [0003] Different from other heavy metal pollutants, among the chromium species commonly used in chemical industry, electronics, leather tanning, electroplating and other processes, hexavalent chromium, which is more harmful to human body, is usually repres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/34C02F101/22
CPCC02F1/5236C02F3/34C02F2101/22C02F2305/06
Inventor 周豪杨重王志威庞巧童刘欣占敬敬
Owner DALIAN UNIV OF TECH
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