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Method for repairing heavy metal polluted tailing

A technology of heavy metals and tailings, which is applied in the field of phytoremediation of heavy metal pollution. It can solve the problems of occupying land, not being treated, and endangering the surrounding environment, and achieves the effects of low cost, convenient operation, and solving post-processing problems.

Inactive Publication Date: 2014-04-09
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the mining and smelting process, a large amount of tailings containing high concentrations of heavy metals will be produced. These tailings have been accumulated in the tailings pool for a long time without treatment, not only occupying a large amount of land, but also seriously endangering the surrounding environment.

Method used

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  • Method for repairing heavy metal polluted tailing

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Effect test

Embodiment 1

[0010] (1) Collect tailings from the tailings reservoir in Huanjiang County, Hechi City, Guangxi, air-dry, and put into pots, 2 kg per pot, and set up 2 groups with 3 pots in each group; ① Control group (CK): no modifier is applied, that is Each pot contains 2kg of tailings; ② Improver group (T): apply modifier: peat + pig manure + plant ash, that is, each pot contains 1.5kg of tailings + 0.4kg of pig manure + 0.1kg of plant ash + 0.2kg of peat.

[0011] (2) One week later, plant hybrid pennisetum in each group of three pots in step (1), transplant three plants in each pot, and water regularly every day to keep the water content at 75% of the field water holding capacity; Adjust the position of the experimental pot once a week to ensure that the light and temperature of each pot are basically the same. After 3 months of pasture growth, the plant survival rate, plant height, and leaf number were measured, and then the harvested plant samples were rinsed with deionized water, dr...

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Abstract

The invention discloses a method for repairing heavy metal polluted tailing. The method comprises the following concrete steps: (1) applying modifying agents to the heavy metal polluted tailing, wherein the tailing contains excessive heavy metals of arsenic (As), zinc (Zn), lead (Pb) and copper (Cu), the modifying agents comprise peat, pig manure and plant ash, and 0.2-0.6 T of pig manure, 0.02-0.07 T of plant ash and 0.1-0.5 T of peat are applied in the heavy metal polluted tailing per ton; (2) planting forage grass in the tailing after being processed in the step (1) to keep moist, wherein the forage grass is pnnisetumpurpureum Pglaucum; and (3) harvesting the forage grass after growing in the step (2), wherein the forage grass reaches national health and safety standards of feeds and is used for feed production and livestock breeding. The method has the advantages of low cost and convenience in operation; and purposes of polluted soil repair and production can be achieved, and the after-treatment problem of repaired plants can be solved.

Description

technical field [0001] The invention relates to the field of phytoremediation of heavy metal pollution, in particular to a method for remediating tailings polluted by heavy metals. Background technique [0002] During the mining and smelting process, a large amount of tailings containing high concentrations of heavy metals will be produced. These tailings have been accumulated in the tailings reservoir for a long time without treatment, not only occupying a large amount of land, but also seriously endangering the surrounding environment. A large amount of heavy metals spread to the surrounding soil, surface water body and groundwater in a radial and funnel shape due to sun exposure, rain, and water washing. my country has a large area of ​​abandoned tailings reservoirs, how to make use of these abandoned tailings is an important and urgent task. Contents of the invention [0003] The purpose of the invention is to provide a method for repairing tailings polluted by heavy ...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 张杏锋张学洪
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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