Method for treating acid mine wastewater based on engineering barrier multistage time sequence resistance control

An acid mine wastewater and barrier technology, applied in mining wastewater treatment, water/sewage multi-stage treatment, chemical instruments and methods, etc., can solve the problems of limited treatment effect, low maintenance cost, large floor space, etc., and achieve large-scale applications Value, easy on-site construction, good repair effect

Active Publication Date: 2020-04-17
河南省地质调查院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to solve the above problems, the object of the present invention is to address the technical problems of high treatment cost, limited treatment effect, and large floor area in the treatment of acid mine wastewater by traditional methods. On the basis of traditional methods such as neutralization method and adsorption method, the separated The technology of vertical engineering barrier barrier control in sewage anti-seepage engineering is introduced into the field of mine acid wastewater treatment, and a method for treating acid mine wastewater based on engineering barrier multi-level sequential barrier control is provided. The invention is generally simple and easy to implement, and can neutralize acid mine wastewater Wastewater, effectively remove a variety of heavy metal ions, and at the same time low maintenance cost, can be promoted in actual engineering, has important engineering significance and theoretical research value

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  • Method for treating acid mine wastewater based on engineering barrier multistage time sequence resistance control
  • Method for treating acid mine wastewater based on engineering barrier multistage time sequence resistance control
  • Method for treating acid mine wastewater based on engineering barrier multistage time sequence resistance control

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Effect test

Embodiment 1

[0044] A method for treating acidic mine wastewater based on engineering barrier multi-level time-sequential resistance control, the adopted process is as follows figure 1 As shown, the specific steps are as follows:

[0045] (1) First, the acid mine wastewater treatment site is divided into 6 sections along the direction of wastewater flow, see figure 2 , including:

[0046] Section I is the first neutralization reaction section for laying out the neutralization reaction wall 1;

[0047] Section II is the original stratum section;

[0048] Section III is used to arrange the second neutralization reaction section of the neutralization reaction wall 2;

[0049] Section IV is the original formation section, and three monitoring points are set in this section;

[0050] Section V is used to lay out the metal ion adsorption section of the red clay-bentonite soil engineering barrier;

[0051] Section VI is the final monitoring section, with 4 monitoring points.

[0052] (2) U...

Embodiment 2

[0071] Investigate the influence of different components and different contents of backfill soil in the engineering barrier wall on the treatment of acid mine wastewater: set up three experimental groups:

[0072] Experimental group 1: the backfill soil A in the tank a of section I is composed of red clay, fly ash and bentonite, and the corresponding mass ratio is 30:60:10; the backfill soil B in the tank b of section III is composed of red clay It is composed of clay, fly ash and bentonite, and its corresponding mass ratio is 60:25:15; the backfill soil C in the tank c of section V is composed of red clay and bentonite, and its mass ratio is 90:10.

[0073] Experimental group 2: The backfill soil A in the tank body a of section I is composed of red clay, fly ash and bentonite, and the corresponding mass ratio is 30:55:15; the backfill soil B in the tank body b of section III is composed of red clay It is composed of clay, fly ash and bentonite, and its corresponding mass rati...

Embodiment 3

[0088] Referring to the method of embodiment 1, the difference is: (5) the backfill soil prepared in step 4 is compacted into a block, and the pieces are put into corresponding reinforcement cages and tank bodies, and the compaction degree of the backfill soil A in the reinforcement cage is respectively The setting is 80%, 90%, 94%; the compaction degree of backfill soil B is 94%; the compaction degree of backfill soil C in tank c is 98%.

[0089] Figure 5 It is the final monitoring data of pH in section VI of backfill A under different compaction degrees.

[0090] from Figure 5 It can be seen from the figure that when the compaction degree of backfill soil A is 80%, the pores of the mixed soil are large, the residence time of acid wastewater in the first neutralization reaction stage is short, the acid mine wastewater is not completely neutralized, and the final monitoring value of pH is less than 7 (4.62). When the compaction degree of the backfill is 94%, the pH value ...

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Abstract

The invention discloses a method for treating acid mine wastewater based on engineering barrier multistage sequential resistance control. The method specifically comprises the steps: dividing an acidmine wastewater treatment site into six sections, namely a first neutralization reaction section, a first original stratum section, a second neutralization reaction section, a second original stratumsection, a metal ion adsorption section and a final monitoring section, along the wastewater flowing direction; digging a groove body a in the first neutralization reaction section, digging a groove body b in the second neutralization reaction section, and digging a groove body c in the metal ion adsorption section; filling the groove body a with a reinforcement cage filled with backfill soil A; filling the groove body b with a reinforcement cage filled with backfill soil B; and filling the groove body c with backfill soil C. The method is simple and feasible on the whole, can neutralize acidmine wastewater and effectively remove various heavy metal ions in the acid mine wastewater, is low in maintenance cost, has generalizability in actual engineering, and has important engineering significance and theoretical research value.

Description

technical field [0001] The invention relates to the field of geological engineering technology or groundwater treatment, in particular to a method for treating acidic mine wastewater based on engineering barrier multi-level time-sequence resistance control. Background technique [0002] China is one of the countries with the richest minerals and the most resources in the world. By the end of 2018, 173 kinds of minerals had been discovered in my country, including 162 kinds of minerals with proven reserves. The industrial technological revolution will continue to promote the in-depth development of mineral resources in my country. At the same time, the environmental problems brought about by the development of mineral resources are becoming more and more serious. Mine wastewater is one of the main pollution sources of mine environment, among which acid mine wastewater has the widest scope of pollution and the most harmful degree. Sulfur-containing minerals in ore deposits, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F103/10
CPCC02F1/28C02F1/66C02F2101/20C02F2103/10
Inventor 贺勇胡广张可能薛生国李冰冰喻志鹏蒋文强
Owner 河南省地质调查院
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