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Repairing method for remediation of antimony and zinc combined pollution and application

A technology for compound pollution and restoration method is applied to the restoration method and application field of restoration of antimony and zinc compound pollution, which can solve the problems of high cost of antimony and zinc pollution treatment, and the inability to repair antimony and zinc compound pollution at the same time, and achieves good industrial application. Prospects, reducing environmental pollution, and the effect of low cost

Pending Publication Date: 2021-09-07
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the present invention provides a repair method and application for repairing antimony and zinc compound pollution, so as to solve the problems that the existing antimony and zinc pollution control costs are high, and antimony and zinc compound pollution cannot be repaired at the same time

Method used

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  • Repairing method for remediation of antimony and zinc combined pollution and application
  • Repairing method for remediation of antimony and zinc combined pollution and application
  • Repairing method for remediation of antimony and zinc combined pollution and application

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1 A kind of remediation method for repairing antimony and zinc composite pollution

[0039] 1. Enrichment and domestication of sulfate-reducing bacteria

[0040] Enrichment medium formula: K 2 HPO 4 0.5 g / L, Na 2 SO 4 1 g / L, MgSO 4 ·7H 2 O 2g / L, CaCl 2 ·6H 2 O0.1g / L, NH 4 Cl 1g / L, yeast extract 1g / L, sodium lactate 1g / L, ascorbic acid 0.5g / L; pH 7.0±0.2.

[0041] Weigh 1g of the mine sample and inoculate it into a reactor containing 100mL enriched medium, and add 0.5g / LFe(NH 4 ) 2 ·(SO 4 ) 2 ·6H 2O, fill the reactor with nitrogen for 5 minutes to discharge the oxygen in the reactor, seal the bottle cap and place it in an incubator at 30°C for 5 days. After the liquid turns black and it turns black with lead acetate test paper, you can smell the obvious smell of rotten eggs when you open the bottle mouth, indicating that there is H in the bottle mouth. 2 S gas is produced, and the sulfate-reducing bacteria have grown in large numbers at this t...

experiment example 1

[0046] Identification of Experimental Example 1 Reaction Product

[0047] After one reaction cycle, the precipitate in SZ was collected, centrifuged and dried for characterization. Figure 4 (a) is the scanning electron micrograph of microorganisms, compared to figure 1 There is no clear short rod shape, and the whole is covered by a layer of things. It is speculated that the bacterial flora may be covered by the formed sediment. combine Figure 4 (b) and Table 1, it can be seen that the reaction products are mainly composed of C, O, S, P, Cl, Na, Mg, Sb, Zn and other elements, wherein the existence of C, O, and P is due to the The presence of organic matter, Cl, Na, Mg may be attributed to the culture medium of microorganisms, while the presence of elemental S and Zn, Sb may be due to the fixation of Sb(III) and Zn(II) as sulfide precipitates. In order to further verify this hypothesis, the precipitates generated in the SZ reactor were analyzed in combination with XRD. Su...

experiment example 2

[0051] Analysis of pH and TOC changes in the reactor of Experimental Example 2

[0052] The TOC value in the reaction process is detected by a total organic carbon analyzer, and the pH in the reaction process is detected by a pH meter. The result is as Image 6 As shown, the concentration of TOC gradually decreased in the first three days as the reaction progressed and gradually stabilized thereafter, indicating that sodium lactate acted as Electron donors and carbon sources, also indicated in previous studies. The pH of the solution first decreased, then increased slowly, and finally stabilized at about 6.5, indicating that the pH after the reaction was finally stabilized at neutral conditions without causing an extreme acid-base environment.

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Abstract

The invention discloses a remediation method for remediation of antimony and zinc combined pollution and application, and particularly relates to the field of soil remediation. The remediation method comprises the steps of enrichment of sulfate reducing bacteria, curing of the sulfate reducing flora on the Sb (III) and the Zn (II) and acute toxicity detection. When the microbial method provided by the invention is used for treating antimony-zinc combined pollution, the cost is low, the efficiency is high, and harmful pollutants in the environment can be treated in situ, so that the sustainable development of the environment is realized. The microbial metabolism capacity is high, the specific surface area is large, and the surface is charged, so that the microbial can repair heavy metal pollution through cell metabolism, biological adsorption, precipitation and redox. The sulfate reducing flora provided by the invention can be used for simultaneously converting Sb (III) and Zn (II) into sulfide precipitates and converting free forms of the Sb (III) and the Zn (II) into insoluble precipitates, so that the environmental pollution degree is reduced, a bioremediation material is provided for remediation of heavy metal pollution of mines, and the sulfate reducing flora has a very good industrial application prospect.

Description

technical field [0001] The invention relates to the field of soil pollution control, in particular to a repair method and application for repairing antimony and zinc compound pollution. Background technique [0002] Heavy metals are potentially harmful pollutants, mainly from industries such as mining and smelting, daily life, agriculture, transportation, etc. 40% of heavy metal pollution comes from non-ferrous metal mining industries. China has the most abundant antimony (Sb) resources in the world, mainly concentrated in Guangxi, Hunan, Yunnan and other places. The tin mine in the central part of Hunan Province is the largest antimony mine in the world and is known as the "World Antimony Capital". Sb is an indispensable element in modern industry. The widespread use of mining, smelting, coal burning and Sb-containing products makes a large amount of Sb pollutants enter the environment. In most mine environments, it is often the compound pollution of Sb and various heavy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/10B09C2101/00
Inventor 姚俊李淼淼刘思远刘建丽刘帮李浩宋琪
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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