CN102210205A - Method for rapidly recovering vegetation in red mud disposal field - Google Patents

Abstract

The invention discloses a method for rapidly recovering vegetation in a red mud disposal field, belongs to a method for cultivating vegetation, and aims to provide a method for rapidly recovering vegetation in the red mud disposal field. The method comprises the following steps of: mixing powder phosphorus gypsum and red mud in a weight ratio of 1:2, adding water and stirring intermittently; standing and repeating; drying precipitates to obtain dealkalized red mud; mixing the dealkalized red mud and crushed phosphorus gypsum in a weight ratio of 10:1 to obtain a modified matrix; and mixing 30 to 40 percent of modified matrix and 60 to 70 percent of activated sludge to obtain a growth matrix, covering the growth matrix on the surface of the red mud disposal field, conventionally weeding, covering non-woven fabrics and performing construction management by using a conventional method. By the method, the red mud can be effectively solidified, and is prevented from being leaked, scoured and lost and flying, and the environmental pollution is reduced; moreover, the method is a method for recovering vegetation in the red mud disposal field.

Description

Method in the quick restore vegetation of red mud yard

Technical field: the present invention relates to a kind of method of restore vegetation, relate in particular to a kind of method in the quick revegetation of red mud yard.

Background technology: red mud is a large amount of refuses that discharge in the aluminum oxide production process, presents redness because of containing iron oxide, so claim " red mud "; Its pH value and salt are all very high, can impact environment.Red mud piling up not only will take a large amount of soils, stacks the cost build a dam also than higher, and the alkali in the red mud infiltrates easily and cause body of groundwater and soil pollution, and the ecosystem is damaged; Moreover, Luo Lu red mud forms dust and atmosphere pollution easily.Therefore, how on the red mud piling up field fast restore vegetation become problem anxious to be solved.

Summary of the invention: at the above-mentioned defective that prior art exists, the present invention aims to provide a kind of method in the quick restore vegetation of red mud yard, prevents or alleviates the harm that red mud causes environment to reach.

To achieve these goals, the present invention is by the following technical solutions: with ardealite and activated sludge is that material modified physicochemical property to red mud improves, with the configuration of the red mud after modification growth substrate, on growth substrate, cultivate vegetation according to a conventional method, concrete grammar is as follows:

1) ardealite is pulverized, smash diffusing, itself and the weight ratio of red mud by 1: 2 are mixed, add 6～10 times of weight water, stirred 1.5～2 hours intermittence; Leave standstill, repeat 3～5 times; Pour out supernatant, sediment dries, and gets the dealkalize red mud;

2) ardealite of dealkalize red mud and the pulverizing weight ratio by 10: 1 is mixed, modified substrate;

3) activated sludge of modified substrate and air-dry pulverizing is pressed column weight amount percentage mix, be configured to growth substrate: modified substrate 30～40%, activated sludge 60～70%;

4) growth substrate is covered red mud yard surface, cladding thickness 5～10cm;

5) dial according to a conventional method and spread grass seeds, cover nonwoven; Construction management according to a conventional method.

Activated sludge in the technique scheme is micropopulation and the organic substance that they depended on and the general name of inorganic substances, and micropopulation mainly comprises bacterium, protozoa and algae etc.Containing nutritive element and abundant microorganisms such as a large amount of nitrogen phosphorus in the activated sludge, is a kind of ideal material of revegetation.

Compared with the prior art, the present invention is owing to adopted technique scheme, utilize the relevant rudimentary knowledge and the basic theories of subjects such as botany, plant nutrition and fertilizer science, with activated sludge and ardealite is material modified, to the planting natural disposition and can improve of red mud, thereby realized the fast quick-recovery of red mud container yard vegetation slope protection greening.Ardealite in the scheme can not only in and the alkalescence of red mud, also provide phosphorus and calcium constituent and the function of solidifying muddy water in addition; Activated sludge can provide abundant nitrogen P elements and a large amount of microorganisms.The present invention can fixed red mud, control red mud seepage, washes away, runs off and fly upward, and alleviates the pollution of environment.

Below be to adopt the inventive method to carry out perennial ryegrass, clover, one group of obtained data of Festuca Arundinacea mixed seeding test:

The unit weight of growth substrate is less, and porosity is bigger, has certain water retention capacity, possesses the main base attribute of natural soils; The pH value is 6～9, and electrical conductivity is lower than 1.2ms, meets the requirement of plant growing; Percentage of seedgermination is greater than 90%, and plant growing is all right, plant no abnormality seen, phenomenon such as no withered and yellow, wilting, lodging; After one month, vegetation coverage has reached 100%.

Embodiment: the invention will be further described below in conjunction with specific embodiment:

Embodiment 1

1) ardealite is pulverized, is smash diffusing, standby;

2) get above-mentioned ardealite 10kg and red mud 20kg and mix, add 180kg water, intermittently stirred 1.5 hours; Left standstill 20 minutes, and repeated 3 times; Pour out supernatant, sediment dries, and gets the dealkalize red mud;

3) get dealkalize red mud 10kg and standby ardealite 1kg mixes, modified substrate;

4) get modified substrate 3kg and mix, be configured to growth substrate with the activated sludge 7kg of air-dry pulverizing;

5) growth substrate is covered red mud yard surface, cladding thickness 5cm;

6) dial according to a conventional method and spread grass seeds, cover nonwoven; Construction management according to a conventional method.

Embodiment 2

Each step is with embodiment 1, wherein, step 2) in water 300kg, stir 2 hours, repeat 5 times; The activated sludge 6kg of the modified substrate 4kg in the step 4), air-dry pulverizing; Cladding thickness 10cm in the step 5).

Embodiment 3

Each step is with embodiment 1, wherein, step 2) in water 240kg, stir 2 hours, repeat 4 times; The activated sludge 6.5kg of the modified substrate 3.5kg in the step 4), air-dry pulverizing; Cladding thickness 7cm in the step 5).

Claims (1)

1. method in the quick restore vegetation of red mud yard, it is characterized in that: with ardealite and activated sludge is that material modified physicochemical property to red mud improves, with the configuration of the red mud after modification growth substrate, on growth substrate, cultivate vegetation according to a conventional method, concrete grammar is as follows:

1) ardealite is pulverized, smash diffusing, itself and the weight ratio of red mud by 1: 2 are mixed, add 6～10 times of weight water, stirred 1.5～2 hours intermittence; Leave standstill, repeat 3～5 times; Pour out supernatant, sediment dries, and gets the dealkalize red mud;

2) ardealite of dealkalize red mud and the pulverizing weight ratio by 10: 1 is mixed, modified substrate;

3) activated sludge of modified substrate and air-dry pulverizing is pressed column weight amount percentage mix, be configured to growth substrate: modified substrate 30～40%, activated sludge 60～70%;

4) growth substrate is covered red mud yard surface, cladding thickness 5～10cm;

5) dial according to a conventional method and spread grass seeds, cover nonwoven; Construction management according to a conventional method.