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WO2018043773A1 - Technique d'élimination et de régulation de métal lourd par électrolyse - Google Patents

Technique d'élimination et de régulation de métal lourd par électrolyse Download PDF

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Publication number
WO2018043773A1
WO2018043773A1 PCT/KR2016/009671 KR2016009671W WO2018043773A1 WO 2018043773 A1 WO2018043773 A1 WO 2018043773A1 KR 2016009671 W KR2016009671 W KR 2016009671W WO 2018043773 A1 WO2018043773 A1 WO 2018043773A1
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WO
WIPO (PCT)
Prior art keywords
electrolysis
heavy metals
heavy metal
solution
current density
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2016/009671
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English (en)
Korean (ko)
Inventor
원종일
정원영
서영록
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Industry Academic Cooperation Foundation of Dongguk University
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Industry Academic Cooperation Foundation of Dongguk University
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Publication date
Application filed by Industry Academic Cooperation Foundation of Dongguk University filed Critical Industry Academic Cooperation Foundation of Dongguk University
Publication of WO2018043773A1 publication Critical patent/WO2018043773A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/26—Treatment of water, waste water, or sewage by extraction
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • C02F1/64—Heavy metal compounds of iron or manganese
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment

Definitions

  • the present invention relates to a technique for removing and controlling heavy metals using electrolysis technology.
  • Heavy metal refers to a heavy metal element having a specific gravity of 4 or more mainly located below the periodic table such as arsenic, lead, mercury, cadmium, chromium, and copper.
  • the heavy metal when it is eluted in water and discharged into the environment, it is essential to have a technology for preventing environmental pollution by heavy metal because it moves to humans along the food chain while circulating in the biosphere.
  • groundwater, mine wastewater, landfill wastewater, and the like may contain heavy metals, and there are many difficulties in treating such heavy metals.
  • the present invention relates to a technology capable of easily removing and controlling heavy metals contained in an electrolyte solution using electrolysis technology, and to provide a method for removing heavy metals using electrolysis.
  • the present invention includes the steps of (a) charging the electrode in a solution containing heavy metal; (b) applying a current density to the solution; And (c) depositing the heavy metal in the solution into a powder to remove the precipitated heavy metal powder; It provides a method for removing heavy metals using electrolysis comprising a.
  • the heavy metals in the solution can be powdered, thereby easily removing the powdered heavy metals. It can work.
  • FIG. 1 is a view showing a schematic diagram of an electrolysis cell for removing heavy metals according to an embodiment of the present invention.
  • FIG. 2 is a view showing an electrode of an electrolytic cell according to an embodiment of the present invention ((a) anode, (b) cathode).
  • FIG. 3 is a photograph showing the color change of the electrolyte solution with time during the electrolysis process according to an embodiment of the present invention.
  • Figure 5 is a graph showing the amount of lead content change in the embodiment of the present invention.
  • Figure 6 is a graph showing the amount of chromium content change in the embodiment of the present invention.
  • FIG. 7 is a graph showing the amount of change in mercury content in an embodiment of the present invention.
  • the present invention relates to a method for removing heavy metals using electrolysis.
  • the method for removing heavy metals using the electrolysis of the present invention comprises the steps of (a) charging an electrode in a solution containing heavy metals, (b) applying a current density to the solution, and (c) the solution. And depositing the heavy metal in the powder, thereby removing the precipitated heavy metal powder.
  • the method for removing heavy metals using the electrolysis of the present invention it is possible to simply remove the heavy metals in a solution containing heavy metals, such as pickling waste liquid at low cost, accordingly the heavy metals using the electrolytic solution from which the heavy metals are removed.
  • the term “heavy metal” is mainly located below the periodic table such as arsenic, antimony, lead, mercury, cadmium, chromium, tin, zinc, barium, bismuth, nickel, cobalt, manganese, vanadium, and selenium. It means a heavy metal element having a specific gravity of 4 or more, in one embodiment of the present invention may mean a heavy metal contained in the pickling waste liquid.
  • current density refers to I / S obtained by dividing the current I flowing through a conductor by the cross-sectional area S in a direction perpendicular to the streamline. It may mean that the size is expressed per unit area.
  • Method for removing heavy metals using electrolysis comprises the steps of (a) charging the electrode in a solution containing heavy metal, (b) applying a current density to the solution and (c) the heavy metal in the solution powder Precipitating to, including the step of removing the precipitated heavy metal powder.
  • the “heavy metal-containing solution” may refer to any solution containing heavy metals, and may refer to an electrolyte that is dissolved in a solvent such as water and dissociated into ions to flow a current. For example, it may be pickling waste liquid discharged from the metal smelting industry.
  • the electrode in step (a) may be composed of a positive electrode and a negative electrode, more specifically, the electrode may be at least two selected from the group consisting of iron, stainless steel, zinc, copper, platinum, for example, the positive electrode As a high purity iron, a high purity stainless steel can be used as the cathode.
  • the current density may be appropriately applied in consideration of the area of the cathode, which is a general thin film plating condition in order to grow heavy metal to be removed from the electrode of the electrolytic cell in the form of powder rather than a thin film. More overcurrent can be applied.
  • step (b) it is possible to control the current density, the application time of the current density, the temperature of the solution and the hydrogen ion index (pH).
  • the current density may be 20 to 200 mA / cm 2 . More specifically, when the current density is less than 20 mA / cm 2 , a long time is required for heavy metal removal, and when the current density exceeds 200 mA / cm 2 , the current density applied to the electrolytic cell is increased due to an increase in heavy metal removal cost. To 200 mA / cm 2 is preferred.
  • the higher the current density applied to the solution the more effectively the heavy metal can be removed, but it can be changed according to experimental conditions such as the area of the cathode electrode, the capacity of the solution and the type of heavy metal to be removed.
  • the current density may be applied for 1 to 240 hours, and more specifically, within 24 hours.
  • lead was removed in 12 hours, and it took 6 hours to remove 100% of chromium and mercury.
  • the temperature of the solution in step (b) may be 15 to 80 ° C, heavy metal removal can be carried out at room temperature.
  • the temperature of the solution exceeds 80 °C can evaporate the solution may cause a phenomenon that the electrolyte is insufficient.
  • the hydrogen ion index of the above-described solution may be controlled to pH0.01 to pH10.
  • the solution may be removed using a strong acid pickling solution of a strong acid to remove heavy metals in the pickling solution.
  • the heavy metal in the electrolyte solution may be precipitated as a powder to remove the precipitated heavy metal powder. More specifically, the step (c) may be removed by filtering or separating from the solution containing the precipitated heavy metal powder to extract the heavy metal.
  • the heavy metal in the pickling waste liquid was removed by using an electrolysis technique.
  • Figure 1 shows an electrolytic cell for removing heavy metals in the pickling waste liquid by the electrolysis technique.
  • an electrolytic cell was formed, and an pickling waste liquid from which impurities were removed was used as an electrolyte solution.
  • the positive electrode used high purity iron, and the negative electrode to which the heavy metal to be removed is adsorbed and / or precipitated substantially used stainless steel of high purity.
  • the current density was applied by calculating the area of the cathode and the experiment was performed.
  • FIG. 2 is a view showing the electrode of the electrolytic cell according to an embodiment of the present invention ((a) anode, (b) cathode), referring to Figure 2, it can be seen that the area of the cathode is larger than the area of the anode. .
  • the pickling waste solution was repeatedly filtered through an filter paper to remove impurities, and the pH of the electrolyte solution was adjusted using hydrochloric acid (HCl) and sodium hydroxide (NaOH).
  • a current density of 50 mA / cm 2 was applied to the electrolyte of the pickling waste liquid from which impurities were removed, and the amount of change of heavy metals was changed by changing the application time of the current density to 3 hours, 6 hours, 9 hours, 12 hours, 24 hours, and 48 hours. Measured.
  • FIG. 3 is a photograph showing a color change for electrolysis with time in the process of electrolysis according to an embodiment of the present invention.
  • the color of the electrolyte solution was changed as the application time was increased. This means that, in accordance with the principle of electrolysis technology, various metal components together with heavy metals in pickling waste used as electrolytes were adsorbed on the surface of stainless steel, which is a cathode, or precipitated as powders in electrolytes.
  • Example 1 The color change of the electrolyte in Example 1 was analyzed by an Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES), and the results are shown in FIGS. 4 to 7.
  • ICP-OES Inductively Coupled Plasma Optical Emission Spectrometer

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

La présente invention concerne un procédé d'élimination de métal lourd au moyen d'une électrolyse, le procédé comprenant les étapes consistant : (a) à insérer des électrodes dans une solution contenant un métal lourd ; (b) à appliquer une densité de courant à la solution ; et (c) à éliminer la poudre de métal lourd précipité, le métal lourd dans la solution ayant été précipité en une poudre.
PCT/KR2016/009671 2016-08-29 2016-08-30 Technique d'élimination et de régulation de métal lourd par électrolyse Ceased WO2018043773A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20160109808 2016-08-29
KR10-2016-0109808 2016-08-29

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WO2018043773A1 true WO2018043773A1 (fr) 2018-03-08

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PCT/KR2016/009671 Ceased WO2018043773A1 (fr) 2016-08-29 2016-08-30 Technique d'élimination et de régulation de métal lourd par électrolyse

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112945824A (zh) * 2021-02-24 2021-06-11 西安欧中材料科技有限公司 一种细粒径镍基高温合金粉末中夹杂物的检测方法
CN113526626A (zh) * 2021-07-21 2021-10-22 浙江大学 一种三维铁锰复合电极去除水中五价锑污染物的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000052340A (ko) * 1999-01-23 2000-08-25 이호인 아연페라이트가 함유된 제강분진으로부터 염산과 금속아연의 회수방법
KR20040052844A (ko) * 2004-05-10 2004-06-23 박재호 니켈폐액 및 수산니켈슬러지에서 니켈 회수방법
JP2008540835A (ja) * 2005-05-10 2008-11-20 プバダ、ジョージ 電炉その他の炉から排出される酸化亜鉛とジンクフェライトを含むダストや残滓の処理工程
KR101282796B1 (ko) * 2013-03-11 2013-07-05 주식회사 엔코 아연함유 폐산으로부터 아연 금속 분말의 회수방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000052340A (ko) * 1999-01-23 2000-08-25 이호인 아연페라이트가 함유된 제강분진으로부터 염산과 금속아연의 회수방법
KR20040052844A (ko) * 2004-05-10 2004-06-23 박재호 니켈폐액 및 수산니켈슬러지에서 니켈 회수방법
JP2008540835A (ja) * 2005-05-10 2008-11-20 プバダ、ジョージ 電炉その他の炉から排出される酸化亜鉛とジンクフェライトを含むダストや残滓の処理工程
KR101282796B1 (ko) * 2013-03-11 2013-07-05 주식회사 엔코 아연함유 폐산으로부터 아연 금속 분말의 회수방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KIM, JAE YONG, JOURNAL OF INDUSTRIAL SCIENCE AND TECHNOLOGY INSTITUTE, vol. 16, no. 1, 30 June 2002 (2002-06-30), pages 171 - 183 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112945824A (zh) * 2021-02-24 2021-06-11 西安欧中材料科技有限公司 一种细粒径镍基高温合金粉末中夹杂物的检测方法
CN113526626A (zh) * 2021-07-21 2021-10-22 浙江大学 一种三维铁锰复合电极去除水中五价锑污染物的方法

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