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Method for treating heavy metal wastewater by superconductive HGMS (high gradient magnetic separation)-FeOOH coupled technique

A heavy metal and waste water technology, applied in the field of resources and environment, can solve the problems of high consumption and high operating costs

Active Publication Date: 2014-03-19
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when used alone, the consumption is large and the operating cost is too high

Method used

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  • Method for treating heavy metal wastewater by superconductive HGMS (high gradient magnetic separation)-FeOOH coupled technique
  • Method for treating heavy metal wastewater by superconductive HGMS (high gradient magnetic separation)-FeOOH coupled technique
  • Method for treating heavy metal wastewater by superconductive HGMS (high gradient magnetic separation)-FeOOH coupled technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take a certain amount of heavy metal wastewater, add 0.1g / ml FeOOH, inject it into the reaction tank of the magnetic field through the peristaltic pump with flow control, and let it stand in the 5T magnetic field for 3 minutes. The diameter of the reaction tank d / the distance i between the magnetic field generator and the reaction tank wall is 5. Measure the arsenic ion concentration in the treated water sample. The concentration of arsenic particles after treatment was 3506.5mL / L, reaching 29.03%.

Embodiment 2

[0026] Take a certain amount of heavy metal wastewater, add 0.6g / ml FeOOH, inject it into the reaction tank of the magnetic field through the peristaltic pump with flow control, and let it stand in the 5T magnetic field for 15 minutes. The diameter of the reaction tank d / the distance i between the magnetic field generator and the reaction tank wall is 3. Measure the arsenic ion concentration in the treated water sample. After treatment, the concentration of arsenic particles was 1130.3mL / L, reaching the best 77.12% (such as figure 2 shown).

Embodiment 3

[0028] Take a certain amount of heavy metal wastewater, add 0.8g / ml FeOOH, inject it into the reaction tank of the magnetic field through the peristaltic pump with flow control, and let it stand in the 5T magnetic field for 8 minutes. The diameter of the reaction tank d / the distance i between the magnetic field generator and the reaction tank wall is 4. Measure the concentration of arsenic ions in the treated water samples. The concentration of arsenic particles after treatment was 1284.6mL / L, reaching 74%.

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Abstract

The invention relates to a method for treating heavy metal wastewater by a superconductive HGMS (high gradient magnetic separation)-FeOOH coupled technique, belonging to the fields of resources and environments. The superconductive HGMS-FeOOH coupled technique for treating heavy metal wastewater has the advantages of simpler operation and higher treatment efficiency than the single absorption technique. The result proves that the superconductive HGMS-FeOOH coupled technique has favorable treatment effect under the conditions of the optimal technological parameters; and the removal rate of arsenic ions from high-concentration arsenic wastewater can reach higher than 77.12% under the following conditions: the addition amount of FeOOH is 0.1-0.9 g / ml, the magnetic gradient is 3-5T, the standing time is 1-15 minutes, and the distance i between the reaction tank diameter d / magnetic field generator and the reaction tank wall is not greater than 3. Before the treatment, no pretreatment is needed, and the pH value of the wastewater is not regulated. Under the technological conditions of the superconductive HGMS-FeOOH coupled technique, the saturation adsorption quantity of FeOOH is 6.5-7.5 mg / g, and the technological parameters can be properly regulated according to the arsenic ion concentration characteristic of wastewater.

Description

Technical field: [0001] The invention belongs to the field of resources and environment, and relates to a coupling process using superconducting HGMS (High Gradient Magnetic Separation) technology and FeOOH (iron oxyhydroxide), which can realize waste treatment and resource utilization. It is especially suitable for the treatment and reuse of acidic high-concentration arsenic-containing heavy metal wastewater. Background technique: [0002] Heavy metal wastewater mainly comes from electroplating, cold-rolled steel and non-ferrous metal smelters, etc. Heavy metal ions such as chromium (Cr), arsenic (As), cadmium (Cd), zinc (Zn), nickel (Ni) contained in wastewater have difficult Degradation, irreversibility, high toxicity and easy bioaccumulation, etc., can produce toxic effects in a small amount, which is extremely harmful, and its efficient treatment is imminent. [0003] Superconducting high-gradient magnetic separation (HGMS) technology shows advantages in the fields of ...

Claims

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Application Information

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IPC IPC(8): C02F1/48C02F1/72C02F101/20
Inventor 李素芹胡彬彬熊国宏钱鑫
Owner UNIV OF SCI & TECH BEIJING
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