CN105330473A - Lead zinc ore contaminated soil remediation fertilizer - Google Patents

Abstract

The invention discloses lead zinc ore contaminated soil remediation fertilizer which is prepared from, by weight, 3-5 parts of bacillus conidial powder, 26-30 parts of grass carbon powder, 40-45 parts of wheat bran, 8-10 parts of dregs of tea-oil tree fruits, 3-5 parts of citric acid, 2-3 parts of zinc sulfate powder, 30-35 parts of pinewood, 17-18 parts of siderite slag, 17-18 parts of limonite slag, 67-73 parts of orange peel, 4-6 parts of EM compound microorganism bacterium agents and a proper amount of water. According to the soil remediation fertilizer, for the content of heavy metal, especially the content of lead and zinc, in the lead zinc ore contaminated soil, through the synergistic effect of organic matter and bactericide in the fertilizer, the plant availability of heavy metal, such as lead and zinc is passivated, the toxicity of the lead element and the zinc element in the soil of the plant roots is relieved, meanwhile the organic content of the contaminated soil is greatly increased in match with the grass carbon powder and the dregs of tea-oil tree fruits, breeding of indigenous microorganism in the soil is promoted, and the self purification capacity of the soil is improved.

Description

A kind of Pb-Zn deposits contaminated soil remediation fertilizer

Technical field

The present invention relates to technical field of fertilizers, particularly relate to a kind of Pb-Zn deposits contaminated soil remediation fertilizer.

Background technology

Along with the fast development of economy and the progress of industrial technology, work, the detrimentally affect of agriculture production to environment are constantly aggravated, constantly stack to soil surface due to solid waste and topple over, harmful waste water constantly permeates in soil, obnoxious flavour in air and floating dust are also continuous to be dropped in soil with rainwater, result in soil pollution.Not only reduce the seed output and quality of farm crop, also the HUMAN HEALTH of indirect hazard.

And to the improvement of soil pollution mainly through engineering repairing method and phytoremediation, wherein engineering repairing method mainly comprises the method for improving the soil, electro reclamation, Soil leaching and heat treating process etc., engineering control measure is applicable to that contaminated area is little usually, severe pollutant and easily the soil effect of diffusion is comparatively obvious, fundamentally can improve soil at all, but treatment cost is high, and easily form secondary pollution, also possibility spoiled soil structure, easily causes soil fertility to decline.The usual cost of phytoremediation technology is low, soil organic matter content and soil fertility can be improved, but the patience of plant heavy metal pollutent is limited, be only applicable to the soil remediation of medium pollution degree, a kind of plant can only repair the soil of a certain heavy metal contamination usually simultaneously, and other heavy metals likely in activating soil, for various metals and organic combined pollution poor effect, super enriching plant poor growth, usual repairing efficiency is longer, is difficult to the requirement that satisfied quick rehabilitating soil pollutes.

Charcoal has good absorption property, stable chemical nature, can reduce the biological effectiveness of heavy metal in soil, can improve crop yield, and raw material is extensive, cost is low, makes it in pollution administration soil, have clear superiority and using value simultaneously.For this reason, it take charcoal as the soil remediation fertilizer of immobilized matrix that the present inventor provides a kind of for Pb-Zn deposits contaminated soil, and the reparation for soil pollution provides a kind of effective way.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of Pb-Zn deposits contaminated soil remediation fertilizer.

The present invention is achieved by the following technical solutions:

A kind of Pb-Zn deposits contaminated soil remediation fertilizer, is made up of the raw material of following weight part: subtilis spore powder 3-5, peat composed of rotten mosses powder 26-30, wheat bran 40-45, the withered 8-10 of tea, citric acid 3-5, zinc sulphate powder 2-3, pine 30-35, sparring slag 17-18, limonite slag 17-18, tangerine peel 67-73, EM complex micro organism fungicide 4-6, water are appropriate.

The concrete steps of the preparation of described soil remediation fertilizer are as follows:

(1) mix after tangerine peel, pine dryness in the sun with sparring slag, be placed in airtight calcining furnace, 380-420 DEG C is warming up under nitrogen atmosphere with the speed of 15 DEG C/min, be incubated and add limonite slag after 20-30 minute, keep thermotonus 30-40 minute, then cool the temperature to 240-260 DEG C, constantly oxygen is passed in airtight calcining furnace, take out calcinate after 30 minutes, concussion is rocked after 10-15 minute and is crossed 20 mesh sieves, obtains magnetic bio carbon powder for subsequent use;

(2) withered to peat composed of rotten mosses powder, wheat bran, tea, the mixing of subtilis spore powder are dropped in fermentation vat, add water and keep fermentation heap water content at 50-60%, ferment and take out fermentation materials after 24-26 days, and squeeze and filter, obtain fermentation solid residue and fermented liquid for subsequent use;

(3) step 2 gained fermented liquid is mixed post-heating to 60-70 DEG C with citric acid, zinc sulphate powder, stir after 10-15 minute and add step 1 gained charcoal powder again, dipping 40-60 minute, during dipping, ultrasound wave irradiation is adopted to fermented liquid, ultrasonic frequency is 20-30kHz, and power is 50-80W, and the time is 90-120 minute, flood rear filtered through gauze, obtain dipping charcoal for subsequent use;

(4) step 3 gained dipping charcoal is mixed with step 2 gained fermentation solid residue, EM complex micro organism fungicide and other leftover materials be placed on granulation in tablets press, for subsequent use;

(5) frequency of utilization is 30-40kHz, power be the ultrasonic wave of 10W to step 4 gained particle irradiation 40-60 minute, weigh after packaging, obtain soil remediation fertilizer of the present invention.

The using method of repairing fertiliser of the present invention is be manured into soil after mixing according to the part by weight of 20%-25% and common fertilizer.

Advantage of the present invention is:

The sparring slag of same part by weight and limonite slag and biomass mixed calcining is used in preparation process, can by the recycling between product, the charcoal of the high magnetic of more efficient acquisition, and significantly increase charcoal surfactivity whereby, improve adsorptivity, add the accumulation ability to soil objectionable constituent, coordinate organic and effect that is mineral filler to play the dual-use function of nutrient supply and soil remediation.

Air in charcoal inner pore can be discharged by the ultrasound wave irradiation in preparation process during dipping, improves the degree of uniformity that in fermented liquid, solute disperses in charcoal, shortens dipping time.

In preparation process, second time ultrasound wave irradiation can to increase after granulation microbic activity in fertiliser granulates, improves the removal effect of dehydrogenase activity and organic pollutant.

Soil remediation fertilizer of the present invention is for Pb-Zn deposits Heavy Metals in Contaminated Soils especially Pb, Zn content, by synergy that is organic in fertilizer and microbial inoculum, the plant availability of the heavy metals such as the plumbous zinc of passivation, alleviate the plumbous zinc element toxicity of plant rhizosphere soil, be equipped with peat composed of rotten mosses powder simultaneously, tea is withered, significantly increase the organic content of contaminated soil, promote the breeding of soil indigenous microorganism, improve soil self-purification ability.

Embodiment

A kind of Pb-Zn deposits contaminated soil remediation fertilizer, is made up of the raw material of following weight part (kg): subtilis spore powder 3, peat composed of rotten mosses powder 26, wheat bran 40, tea are withered 8, citric acid 3, zinc sulphate powder 2, pine 30, sparring slag 17, limonite slag 17, tangerine peel 67, EM complex micro organism fungicide 4, water are appropriate.

The concrete steps of the preparation of described soil remediation fertilizer are as follows:

(1) mix after tangerine peel, pine dryness in the sun with sparring slag, be placed in airtight calcining furnace, 380 DEG C are warming up under nitrogen atmosphere with the speed of 15 DEG C/min, be incubated and add limonite slag after 20 minutes, keep thermotonus 30 minutes, then cool the temperature to 240 DEG C, constantly oxygen is passed in airtight calcining furnace, take out calcinate after 30 minutes, concussion is rocked after 10 minutes and is crossed 20 mesh sieves, obtains magnetic bio carbon powder for subsequent use;

(2) withered to peat composed of rotten mosses powder, wheat bran, tea, the mixing of subtilis spore powder are dropped in fermentation vat, add water and keep fermentation heap water content 50%, ferment and take out fermentation materials after 24 days, and squeeze and filter, obtain fermentation solid residue and fermented liquid for subsequent use;

(3) step 2 gained fermented liquid is mixed post-heating to 60 DEG C with citric acid, zinc sulphate powder, stir after 10 minutes and add step 1 gained charcoal powder again, flood 40 minutes, during dipping, ultrasound wave irradiation is adopted to fermented liquid, ultrasonic frequency is 20kHz, and power is 50W, and the time is 90 minutes, flood rear filtered through gauze, obtain dipping charcoal for subsequent use;

(4) step 3 gained dipping charcoal is mixed with step 2 gained fermentation solid residue, EM complex micro organism fungicide and other leftover materials be placed on granulation in tablets press, for subsequent use;

(5) frequency of utilization is 30kHz, power be the ultrasonic wave of 10W to step 4 gained particle irradiation 40 minutes, after weighing, packaging, obtains soil remediation fertilizer of the present invention.

In order to further illustrate using value of the present invention, contriver have chosen one piece of rice test field by plumbous zinc pollution, wherein half only uses common fertilizer as a control group during rice cultivation, second half uses repairing fertiliser of the present invention and common fertilizer mixed planting as experimental group, to soil sampling analysis between planting season, as follows in conjunction with rice yield:

Control group

Experimental group

Soil available nitrogen content (mg/kg)	50.52	62.24
			Soil available phosphorus content (mg/kg)	86.00	98.30
Available potassium in soils content (mg/kg)	144.30	165.34
			Zinc content of soil (mg/kg)	1537	72
Content of Pb in Soil (mg/kg)	1058	124
			Soil CEC (cmol/kg)	11.24	12.51
Rice yield (kg/ mu)	471	507

After can being found out employed soil remediation fertilizer of the present invention by above data, in soil, available nutrient content obviously increases, soil fertility gets a promotion, soil pollution simultaneously especially Pb, Zn content reduces, ion exchange capacity increases, and the final output improving crop, to soil, there is significant improved effect.

Claims (2)

1. a Pb-Zn deposits contaminated soil remediation fertilizer, it is characterized in that, be made up of the raw material of following weight part: subtilis spore powder 3-5, peat composed of rotten mosses powder 26-30, wheat bran 40-45, the withered 8-10 of tea, citric acid 3-5, zinc sulphate powder 2-3, pine 30-35, sparring slag 17-18, limonite slag 17-18, tangerine peel 67-73, EM complex micro organism fungicide 4-6, water are appropriate.

2. Pb-Zn deposits contaminated soil remediation fertilizer according to claim 1, it is characterized in that, the concrete steps of preparation method are as follows:

(1) mix after tangerine peel, pine dryness in the sun with sparring slag, be placed in airtight calcining furnace, 380-420 DEG C is warming up under nitrogen atmosphere with the speed of 15 DEG C/min, be incubated and add limonite slag after 20-30 minute, keep thermotonus 30-40 minute, then cool the temperature to 240-260 DEG C, constantly oxygen is passed in airtight calcining furnace, take out calcinate after 30 minutes, concussion is rocked after 10-15 minute and is crossed 20 mesh sieves, obtains magnetic bio carbon powder for subsequent use;

(2) withered to peat composed of rotten mosses powder, wheat bran, tea, the mixing of subtilis spore powder are dropped in fermentation vat, add water and keep fermentation heap water content at 50-60%, ferment and take out fermentation materials after 24-26 days, and squeeze and filter, obtain fermentation solid residue and fermented liquid for subsequent use;

(3) step 2 gained fermented liquid is mixed post-heating to 60-70 DEG C with citric acid, zinc sulphate powder, stir after 10-15 minute and add step 1 gained charcoal powder again, dipping 40-60 minute, during dipping, ultrasound wave irradiation is adopted to fermented liquid, ultrasonic frequency is 20-30kHz, and power is 50-80W, and the time is 90-120 minute, flood rear filtered through gauze, obtain dipping charcoal for subsequent use;

(4) step 3 gained dipping charcoal is mixed with step 2 gained fermentation solid residue, EM complex micro organism fungicide and other leftover materials be placed on granulation in tablets press, for subsequent use;

(5) frequency of utilization is 30-40kHz, power be the ultrasonic wave of 10W to step 4 gained particle irradiation 40-60 minute, weigh after packaging, obtain soil remediation fertilizer of the present invention.