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Method for remedying heavy metals in domestic waste leakage solution

A technology for domestic garbage and seepage liquid, which is applied in the field of environmental protection to achieve the effects of reducing secondary pollution, broadening repair methods, and effectively utilizing resources.

Inactive Publication Date: 2009-12-09
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that in order to reduce the risk of secondary pollution of groundwater and deep soil by leaching treatment, it is necessary to effectively remove heavy metals in domestic waste seepage, which is a very valuable technology, but there is still no information about this technology. No reports

Method used

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  • Method for remedying heavy metals in domestic waste leakage solution
  • Method for remedying heavy metals in domestic waste leakage solution
  • Method for remedying heavy metals in domestic waste leakage solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of domestic waste seepage: place domestic waste in a leakage device that can collect the seepage, and leaching the domestic waste. The weight ratio of domestic waste to water is 1:3; leaching three and collect the seepage, and then add 5mmol / L EDT to the obtained seepage to obtain the domestic waste seepage; wherein the seepage: 5mmol / LEDTA ratio by weight is 1:0.03;

[0028] (2) sow ryegrass or tall fescue with 20g / square meter on the plastic net, water 85ml Hoagland nutrient solution and cultivate; Then cover two layers of medical gauze on the plastic gauze net, as the germination bed of lawn plant seed, control light intensity to be 600μmol·m-2·s-1, the average temperature is 24.5°C, and the average humidity is 56.5%;

[0029] (3) After the seeds are cultivated for 30 days, the nutrient solution is all poured out, and the nutrient solution is replaced with the domestic waste seepage liquid containing EDTA, and the lawn plants are continued to be germi...

Embodiment 2

[0033](1) Preparation of domestic waste seepage: place domestic waste in a leakage device that can collect the seepage, and leaching the domestic waste. The weight ratio of domestic waste to water is 1:1; leaching three and collect the seepage, and then add 15mmol / L EDT in the obtained seepage to obtain the domestic waste seepage; the ratio of parts by weight of 15mmol / LEDTA is 1: 0.02;

[0034] (2) sow ryegrass or tall fescue with 40g / square meter on the plastic net, water 200ml Hoagland nutrient solution and cultivate; Cover two layers of medical gauze on the plastic gauze then, as the germination bed of lawn plant seed, control light intensity to be 800μmol·m-2·s-1, the average temperature is 24.5℃, and the average humidity is 56.5%;

[0035] (3) After the seeds are cultivated for 30 days, the nutrient solution is all poured out, and the nutrient solution is replaced with the domestic waste seepage liquid containing EDTA, and the lawn plants are continued to be germinated w...

Embodiment 3

[0039] (1) Materials and methods

[0040] experiment material

[0041] Perennial ryegrass (Lolium perenne L.) and tall fescue (Festuca arundinacea L.), which are common in northern my country, were used as test materials in this experiment. Household waste comes from Tianjin City. Hoagland's nutrient solution composition: mother solution 1: Ca(NO 3 ) 2 4H 2 O 118g / L; mother liquor 2: KNO 3 50.5g / L; KH 2 PO 4 13.6g / L; mother liquor 3: MgSO 4 ·7H 2 O 24.6g / L; mother liquor 4: H 3 BO 3 3.09g / L; MnCl 2 4H 2 O 0.9g / L; ZnSO 4 ·7H 2 O 1.1g / L; CuSO 4 ·5H 2 O 7.5mg / L; (NH4) 2 MoO 4 124mg / L; mother liquor 5: EDTA-Na2 3.72g / L; FeCl 3 ·6H 2 O 2.70g / L. After the mother liquor is prepared, pour it into a bottle with its own label and store it in the refrigerator for later use. The nutrient solution is ready-to-use and ready-to-use. When preparing, take 10mL of mother liquor 1, 2, and 3 respectively, and take 1mL of mother liquor 4 and 5 respectively, mix and then d...

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Abstract

The invention discloses a method for remedying heavy metals in domestic waste leakage solution, which comprises the following steps: sowing lawn plants on a plastic net based on 20-40g / square meter and culturing the lawn plants by irrigating Hoagland nutrient solution; after the lawn plants are cultured for 30 days, pouring the nutrient solution out completely, transplanting the lawn plants to the domestic waste leakage solution containing EDTA and continuing soilless culture on the lawn plants until germination; after the lawn plants are processed in the domestic waste leakage solution for 7-30 days, harvesting Lolium perenne L or Festuca arundinacea L and determining the contents of the heavy metals in the domestic waste leakage solution, on the overground parts and in the root systems of the lawn plants, thereby achieving the remediation effects of the lawn plants on the heavy metals in the domestic waste leakage solution. The technical method of the invention can effectively reduce the contents of such heavy metals as Pb, Cu, Zn, Cd, Cr and Ni in the leakage solution and features simple technical operation process, obvious economic and environmental benefits and broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a technical method for urban domestic garbage pollution control. More specifically, it is a method for remediating heavy metals in domestic waste seepage. Background technique [0002] With the advancement of urbanization in my country, the problem of municipal solid waste has become increasingly prominent and the development trend is not optimistic. For a long time, most cities in my country have used open-air stacking, natural ditch filling and pit filling to deal with municipal solid waste. The harmful components in the waste have caused serious harm to the atmosphere, water bodies, soil, etc., affecting the urban ecological environment and harming the environment. The health of the people has also had a negative impact on the global ecological environment, making the problem of garbage disposal a hot and difficult issue of worldwide concern. The direct stacking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
Inventor 赵树兰多立安
Owner TIANJIN NORMAL UNIVERSITY
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