Industrial wastewater remediation material and application thereof, and treatment method of industrial wastewater containing cobalt-nickel divalent metal cations

A technology for industrial wastewater and restoration materials, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve problems such as easy analysis of heavy metals, secondary pollution, and long-term restoration effects. Achieve the effect of reducing repair cost, reducing raw material dosage, and fast and efficient repair effect

Pending Publication Date: 2020-08-21
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the subsequent treatment of biochar that has adsorbed heavy metals is improper, the adsorbed heavy met...

Method used

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  • Industrial wastewater remediation material and application thereof, and treatment method of industrial wastewater containing cobalt-nickel divalent metal cations
  • Industrial wastewater remediation material and application thereof, and treatment method of industrial wastewater containing cobalt-nickel divalent metal cations
  • Industrial wastewater remediation material and application thereof, and treatment method of industrial wastewater containing cobalt-nickel divalent metal cations

Examples

Experimental program
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preparation example Construction

[0034] In terms of parts by mass, the industrial wastewater restoration material provided by the present invention includes independently packaged component A, and the component A is rice straw biochar. In the present invention, the method for preparing rice straw biochar preferably includes: successively pulverizing and pyrolyzing rice straw to obtain rice straw biochar.

[0035] The present invention has no special limitation on the source of the rice straw, which can be obtained according to methods well known in the art. The present invention has no special limitation on the crushing process, as long as the rice straw can be crushed. In the present invention, the particle size of the pulverized material is preferably 20-200 mesh, more preferably 50-100 mesh. In the present invention, the pyrolysis temperature is preferably 700-900° C., more preferably 750-850° C., and the time is preferably 2-16 hours, more preferably 4-10 hours. In the present invention, the pyrolysis i...

Embodiment 1

[0056] The industrial wastewater used in this example comes from a non-ferrous metal smelting enterprise in Jiaxing City, Zhejiang Province, and is the untreated smelting wastewater of the enterprise. According to "Determination of Nickel in Water Quality by Flame Atomic Absorption Spectrophotometry (GB / T 11912-1989)" and "Determination of Total Cobalt in Water Quality 5-Chloro-2-(Pyridylazo)-1,3-Diaminobenzene Spectrophotometry (HJ 550-2009) "determination of nickel and cobalt content in the waste water, its nickel and cobalt content reached 242mg / L and 329mg / L respectively, and "copper, nickel, cobalt industrial pollutant discharge standard (GB 25467- 2010)" compared with the discharge standards of nickel and cobalt (both 1.0mg / L), exceeding the standard by 242 and 329 times respectively;

[0057] Restoration material ratio: component A rice straw biochar 57.1g, component B (aluminum chloride) 1g, component C (quicklime);

[0058] Among them, the preparation process of comp...

Embodiment 2

[0069] Study the pyrolysis temperature of rice straw and the application amount of component A on the adsorption and stabilization effect of industrial wastewater. In this example, the application amount of component A is 0.5 and 1% of the application amount of component A in Example 1, respectively. times and 5 times, respectively as low application amount group, middle application amount group and high application amount group, other conditions are the same as in Example 1, compare the contents of cobalt and nickel in industrial wastewater after treatment and cobalt and nickel in repair materials after adsorption The dissolution, as shown in Table 1.

[0070] Table 1 The adsorption and stabilization effects of component A with different pyrolysis temperatures and different application amounts on industrial wastewater (unit: mg / L)

[0071]

[0072]

[0073] According to Table 1, it can be seen that Component A obtained by pyrolysis at 700°C has the highest adsorption ca...

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Abstract

The invention provides an industrial wastewater remediation material and application thereof, and a treatment method of industrial wastewater containing cobalt-nickel divalent metal cations, and belongs to the technical field of cationic heavy metal polluted water remediation. A component A in the industrial wastewater remediation material can adsorb metal ions in industrial wastewater and can also adsorb aluminum or iron ions in a component B and improve the concentration of local metal ions, meanwhile, under the pH condition provided by a component C, the conversion from the metal ions to ahydrotalcite-like mineral phase can be accelerated, and the three components are jointly used as components of the remediation material and can achieve a good synergistic effect. After the industrialwastewater remediation material is used for adsorbing heavy metal ions in industrial wastewater, the remediation material after adsorption is subjected to stabilizing treatment, heavy metal can be adsorbed for a long time to form stable hydrotalcite minerals, environmental changes can be well resisted, secondary release of the metal ions is avoided, and the problem of secondary pollution by the heavy metal is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of restoration of cationic heavy metal polluted water bodies, in particular to an industrial wastewater restoration material and its application, and a treatment method for industrial wastewater containing cobalt-nickel divalent metal cations. Background technique [0002] At present, the situation of the water environment is very severe. Heavy metal pollution exists widely in the wastewater of electroplating, non-ferrous metal smelting, tanning and other industries. The heavy metals in the wastewater are highly mobile and cannot be degraded. It is enriched through the food chain and endangers human health. [0003] Conventional heavy metal pollution treatment methods are mainly chemical methods, physical chemical methods and biochemical methods; among them, chemical methods include neutralization precipitation method, sulfide precipitation method and iron oxide precipitation method. The chemical method is ...

Claims

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Application Information

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IPC IPC(8): B01J20/20C02F1/28C02F101/20
CPCB01J20/0229B01J20/0248B01J20/0281B01J20/0288B01J20/0296B01J20/041B01J20/20B01J2220/42B01J2220/4806C02F1/281C02F1/283C02F2101/20
Inventor 崔培昕王玉军杨强
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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