CN105330481A - Chromium-contaminated soil restoring fertilizer - Google Patents

Abstract

The invention discloses chromium-contaminated soil restoring fertilizer which is prepared from, by weight, 13-15 parts of straw fibers, 28-30 parts of castor cakes, 24-26 parts of animal broken bone powder, 1-3 parts of sodium tripolyphosphate, 2-3 parts of ferrous sulfate, 22-25 parts of flax fiber beams, 23-25 parts of spathic iron slag, 23-25 parts of limonite slag, 75-80 parts of orange peel, 3-4 parts of an EM compound microbial agent and a proper amount of water. According to the soil restoring fertilizer, multiple materials are adopted and matched, through the chelation and adsorption functions of sodium tripolyphosphate, charcoal and the like, the harm of heavy metal to soil is lowered, ferrous sulfate and the like are added and jointly act with microorganisms and organic matter, reduction of hexavalent chromium in the soil into nontoxic hexavalent chromium is promoted, meanwhile the content of effective nutritious elements in the soil is increased, the purpose of restoring soil contaminated by heavy metal, especially chromium is achieved, and the chromium-contaminated soil restoring fertilizer has quite good application and popularization value.

Description

A kind of chromium-polluted soil repairing fertiliser

Technical field

The present invention relates to technical field of fertilizers, particularly relate to a kind of chromium-polluted soil repairing fertiliser.

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 chromium-polluted 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 chromium-polluted soil repairing fertiliser.

The present invention is achieved by the following technical solutions:

A kind of chromium-polluted soil repairing fertiliser, is made up of the raw material of following weight part: stalk fibre 13-15, Semen Ricini cake 28-30, animal crushed bone meal 24-26, tripoly phosphate sodium STPP 1-3, ferrous sulfate 2-3, flax shive 22-25, sparring slag 23-25, limonite slag 23-25, tangerine peel 75-80, EM complex micro organism fungicide 3-4, water are appropriate.

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

(1) mix after tangerine peel, flax shive dryness in the sun with sparring slag, be placed in airtight calcining furnace, 370-430 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 250-260 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) stalk fibre, Semen Ricini cake, the mixing of animal crushed bone meal are dropped in fermentation vat, add water and keep fermentation heap water content at 45-55%, 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) by step 2 gained fermented liquid with tripoly phosphate sodium STPP, ferrous sulfate mixing post-heating to 60-70 DEG C, 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 70-80W, and the time is 100-120 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 adopts many material matchings, heavy metal-polluted soil harm is reduced by the chelating adsorption of tripoly phosphate sodium STPP, charcoal etc., the interpolation of ferrous sulfate etc. and microorganism, organic acting in conjunction, promote that in soil, hexavalent chrome reduction is nontoxic trivalent chromium, and promote the effective nutritive element content of soil simultaneously, reach the reparation object of heavy metal especially chromium-polluted soil, there is good application value.

Embodiment

A kind of chromium-polluted soil repairing fertiliser, is made up of the raw material of following weight part (kg): stalk fibre 13, Semen Ricini cake 28, animal crushed bone meal 24, tripoly phosphate sodium STPP 1, ferrous sulfate 2, flax shive 22, sparring slag 23, limonite slag 23, tangerine peel 75, EM complex micro organism fungicide 3, water are appropriate.

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

(1) mix after tangerine peel, flax shive dryness in the sun with sparring slag, be placed in airtight calcining furnace, 370 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 250 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) stalk fibre, Semen Ricini cake, the mixing of animal crushed bone meal are dropped in fermentation vat, add water and keep fermentation heap water content 45%, ferment and take out fermentation materials after 24 days, and squeeze and filter, obtain fermentation solid residue and fermented liquid for subsequent use;

(3) by step 2 gained fermented liquid and tripoly phosphate sodium STPP, ferrous sulfate mixing post-heating to 60 DEG C, 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 70W, and the time is 100 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 the rice test field of one piece of light contamination, 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)	50.41	62.93

Soil available phosphorus content (mg/kg)	82.88	101.81
			Available potassium in soils content (mg/kg)	144.40	170.19
Soil Cr content (mg/kg)	2285	341
			Soil CEC (cmol/kg)	10.57	12.33
Rice yield (kg/ mu)	473	490

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, the especially pollution of chromium level of soil pollution simultaneously reduces, ion exchange capacity increases, and the final output improving crop, to soil, there is significant improved effect.

Claims (2)

1. a chromium-polluted soil repairing fertiliser, it is characterized in that, be made up of the raw material of following weight part: stalk fibre 13-15, Semen Ricini cake 28-30, animal crushed bone meal 24-26, tripoly phosphate sodium STPP 1-3, ferrous sulfate 2-3, flax shive 22-25, sparring slag 23-25, limonite slag 23-25, tangerine peel 75-80, EM complex micro organism fungicide 3-4, water are appropriate.

2. chromium-polluted soil repairing fertiliser according to claim 1, is characterized in that, the concrete steps of preparation method are as follows:

(1) mix after tangerine peel, flax shive dryness in the sun with sparring slag, be placed in airtight calcining furnace, 370-430 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 250-260 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) stalk fibre, Semen Ricini cake, the mixing of animal crushed bone meal are dropped in fermentation vat, add water and keep fermentation heap water content at 45-55%, 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) by step 2 gained fermented liquid with tripoly phosphate sodium STPP, ferrous sulfate mixing post-heating to 60-70 DEG C, 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 70-80W, and the time is 100-120 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.