Composite regulating agent and method for precipitation conversion and flotation removal of metal ions in waste water

A metal ion and precipitation conversion technology, applied in chemical instruments and methods, flotation water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of secondary pollution, long cycle, low efficiency of metal ions, etc. Achieve efficient removal, low cost and simple process

Active Publication Date: 2019-05-17
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of low efficiency, long period, and easy secondary pollution caused by the existing technology of treating metal ions in waste water, the present invention provides a compound regulator and method for metal ion precipitation transformation and flotation removal in waste water, which can realize Efficient and rapid removal of metal ions in wastewater

Method used

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  • Composite regulating agent and method for precipitation conversion and flotation removal of metal ions in waste water
  • Composite regulating agent and method for precipitation conversion and flotation removal of metal ions in waste water
  • Composite regulating agent and method for precipitation conversion and flotation removal of metal ions in waste water

Examples

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Embodiment 1

[0046] A method for precipitation conversion and flotation removal of metal ions in wastewater, Cu in wastewater 2+ , Pb 2+ 、Co 2+ 、Ni 2+ , with a total concentration of 20 mg / L and a pH of 3.0.

[0047] like figure 1 As shown, the specific steps are as follows: sequentially add 300 mg / L of an organic composite regulator consisting of 65 parts of humic acid, 18 parts of fulvic acid, and 17 parts of xylitol in mass parts to the wastewater containing metal ions, and the molar amount consists of for n(Mn 2+ ) / (n(Mn 2+ )+n(Fe 3+ ))=0.2 Fe 3+ , Mn 2+ Particle size regulator 20 mg / L, to obtain metal ion precipitation transformation complex whose particle size is 100 μm; then add mass parts to the mixed solution to form 65 parts of cetyltrimethylammonium bromide, tetradecyl 25 parts of hydroxypropyl phosphate betaine and 10 parts of dodecyl dimethyl betaine, 45 mg / L of surfactant, were used as metal complex collectors for flotation separation, and the flotation separation ti...

Embodiment 2

[0050] A method for precipitation conversion and flotation removal of metal ions in wastewater, Pb in wastewater 2+ , Zn 2+ 、Co 2+ 、Ni 2+ 、As 3+ 、Cr 6+ , with a total concentration of 100 mg / L and a pH of 5.0.

[0051] like figure 1 As shown, the specific steps are as follows: sequentially add 600 mg / L of an organic compound regulator consisting of 70 parts of humic acid, 15 parts of fulvic acid and 15 parts of xylitol in mass parts to the waste water containing metal ions, and the molar amount consists of for n(Mn 2+ ) / (n(Mn 2+ )+n(Fe 3+ ))=0.15 Fe 3+ , Mn 2+ Particle size regulator 72 mg / L, to obtain metal ion precipitation conversion complex, its particle size is 85 μm; then add mass parts to the mixed solution to form cetyltrimethylammonium bromide 70 parts, tetradecane Surfactant 120 mg / L with 18 parts of hydroxypropyl phosphate betaine and 12 parts of dodecyl dimethyl betaine was used as metal complex collector for flotation separation, and the flotation separ...

Embodiment 3

[0054] A method for precipitation conversion and flotation removal of metal ions in wastewater, Cu in wastewater 2+ , Zn 2+ 、Co 2+ 、As 3+ 、As 5+ 、Cr 6+ , with a total concentration of 300 mg / L and a pH of 7.0.

[0055] like figure 1 As shown, the specific steps are as follows: sequentially add 1200 mg / L of an organic composite regulator consisting of 75 parts of humic acid, 18 parts of fulvic acid, and 7 parts of xylitol by weight in the wastewater containing metal ions, and the molar amount consists of for n(Mn 2+ ) / (n(Mn 2+ )+n(Fe 3+ ))=0.12 Fe 3+ , Mn 2+ Particle size regulator 190 mg / L to obtain metal ion precipitation conversion complex, its particle size is 80 μm; then add weight parts to the mixed solution to form 79 parts of cetyltrimethylammonium bromide, tetradecane Surfactant 240 mg / L of 15 parts of hydroxypropyl phosphate betaine and 6 parts of dodecyl dimethyl betaine was used as metal complex collector for flotation separation, and the flotation separa...

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Abstract

The invention discloses a composite regulating agent and method for precipitation conversion and flotation removal of metal ions in waste water. The flotation removal method comprises the steps that an organic composite regulating agent and a particle size regulating agent are sequentially added into the waste water containing metal ions, and a metal ion precipitation conversion compound is obtained; and a surfactant is added into the mixed solution to serve as a metal compound collecting agent to conduct flotation separation, the flotation residual solution is purified water, and the removalrate of metal ions in the waste water reaches up to 95.0-100%. The method can achieve rapid and efficient removal of the metal ions in the waste water, and can also realize effective enrichment of themetal ions in the water; in addition, the method has the advantages of simple technology and low cost, and industrialized application can be easily achieved.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a composite regulating agent and method for precipitation conversion and flotation removal of metal ions in waste water. Background technique [0002] Heavy metal wastewater mainly comes from mineral processing, metallurgy, pharmaceutical, chemical and other fields. Among them, heavy metal pollution not only refers to mercury, lead, cadmium, chromium and arsenic and other biologically toxic ions, but also includes copper, lead, zinc, iron, cobalt, nickel and other metal ions with certain toxicity. Based on the non-decomposable nature of heavy metal ions themselves, heavy metal wastewater has the characteristics of high difficulty in treatment, long time and continuous accumulation. Common heavy metal wastewater treatment methods mainly include physical methods, chemical methods and biological methods. [0003] The physical method is based on the physical interac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/24C02F101/20
Inventor 韩桂洪刘炯天黄艳芳刘兵兵王文娟苏盛鹏曹亦俊黄宇坤彭伟军杨淑珍武宏阳
Owner ZHENGZHOU UNIV
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