CN104475434A - Technological method for directionally separating heavy metal in soil and sludge - Google Patents
Technological method for directionally separating heavy metal in soil and sludge Download PDFInfo
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- CN104475434A CN104475434A CN201410670964.7A CN201410670964A CN104475434A CN 104475434 A CN104475434 A CN 104475434A CN 201410670964 A CN201410670964 A CN 201410670964A CN 104475434 A CN104475434 A CN 104475434A
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Abstract
The invention discloses a technological method for directionally separating heavy metal in soil and sludge. The specific implementation mode is realized by the following technological process: stabilizing heavy metal substances in soil and sludge by utilizing chitosan-like and humic acid-like composite chelating agents prepared by a natural chelating agent in a modification mode so as to prevent the heavy metal substances from migrating into underground water and crops; screening hyperaccumulation nuclear accumulated plants matched with pollution heavy metal, analyzing, absorbing and enriching the chelating state heavy metal by attaching specific microorganisms on the root parts of the hyperaccumulation nuclear accumulated plants, and harvesting and treating and recovering the plants centrally at regular intervals; and planting commercial crops or grains simply or rotationally so as to keep the utilization and production of the land under the condition of effective chelate stabilizers in order to guarantee the utilization of the treated and polluted land and the sludge treated land.
Description
Technical field
The present invention relates to a kind of technical field of administering soil and Heavy Metal Pollution in Sludge thing.
Background technology
So-called heavy metal pollution, refers to the environmental pollution caused by heavy metal or its compound.Caused by the human factors such as mining, toxic emission, sewage irrigation and use heavy metal goods; Because mankind's activity causes the content of beary metal in environment to increase, exceed normal range (NR), and cause environmental quality to worsen.Along with developing rapidly of global economy, the pollutant containing heavy metal enters soil by all means, causes soil severe contamination.
Heavy metal pollution of soil can affect the decline of Crop yield and quality, and by the health of food chain harm humans, also can cause the further deterioration of air and quality of water environment.Therefore the extensive attention of countries in the world is caused.The processing method of heavy metal pollution has a lot, mainly contains bioleaching, phytoremediation, electrokinetic technique, acidifying extraction method, heavy metal deactivation method etc., but all these methods all relate to the normal farming and the plantation that stop soil, and impact is produced normally.
Summary of the invention
Goal of the invention:
The object of the invention is to overcome the deficiencies in the prior art part, the process of the directional separation of a kind of soil and Heavy Metals in Sludge is provided.Its objective is the normal farming and industrial crops and grain that do not stop soil plantation and prevent heavy metal to earth's surface and underground water migration prerequisite under, the technical process of directional separation heavy metal contaminants wherein.
Technical scheme
The process of the directional separation of a kind of soil and Heavy Metals in Sludge, it is characterized in that: heavy metal has the planting of hyperaccumulation on soil or mud, add certain chelate stabilizing agent simultaneously, promote the absorption of plant heavy metal and prevent its water that permeates the ground, and not stopping the normal farming in soil and the plantation of industrial crops and grain simultaneously; The technique of directional separation is divided into three steps:
(1) preparation of chelate stabilizing agent: the heavy metal substance in the shitosan class prepared with natural chelators modification and humic acids association complex stable soil and mud, prevents it from moving in underground water and crop;
(2) screening of directed super enriching plant: the super enrichment core accumulation plant that screening and polluted heavy metals match, by adhering to specific microorganism at its root, realize the parsing to Chelating state heavy metal and absorption also enrichment, regularly plant gathered in and focus on recovery;
(3) selection of industrial crops and plantation: for ensureing the utilization in contaminated ground and the Treatment of Sludge soil be processed, in the effective situation of chelate stabilizing agent, letter value or crop rotation plants economic crops or grain, the utilization in maintenance soil and production.
In step (2), the screening of directed super enriching plant comprises: choose black nightshade to cadmium pollution; Front yard mustard is chosen to nickel contamination; Red-spotted stonecrop is chosen to mercury, chromium, Cu-W ore deposit.
In step (2), choosing of microorganism comprises actinomyces and fungi, can realize parsing that heavy metal carries out and absorb and enrichment.
Advantage and effect:
The first, do not stop the normal farming in soil and the plantation of industrial crops and grain;
The second, prevent heavy metal to earth's surface and underground water migration;
3rd, the super enrichment core accumulation plant that screening and polluted heavy metals match, by adhering to specific microorganism at its root, realizes the parsing to Chelating state heavy metal and absorption also enrichment;
4th, regularly plant gathered in and focus on, and can precious metal be reclaimed.
accompanying drawing illustrates:fig. 1 is present invention process flow chart.
detailed description of the invention:
The present invention is the process of the directional separation of a kind of soil and Heavy Metals in Sludge, and concrete technology technical method is as follows:
Heavy metal substance in the shitosan class prepared with natural chelators modification and humic acids association complex stable soil and mud, prevents it from moving in underground water and crop; The super enrichment core accumulation plant that screening and polluted heavy metals match, by adhering to specific microorganism at its root, realizing the parsing to Chelating state heavy metal and absorption also enrichment, regularly gathers in plant and focus on recovery; For ensureing the utilization in contaminated ground and the Treatment of Sludge soil be processed, in the effective situation of chelate stabilizing agent, letter value or crop rotation plants economic crops or grain, the utilization in maintenance soil and production.
Embodiment 1: the original position oriented control in cadmium pollution rice field, Hunan Province and rehablitation project;
The land requirement improvement that the cadmium pollution of one piece, Hunan Province is very serious, starting fund at least 2,000 ten thousand.Nearly hundred mu of soil cadmium content severe overweights, start the water body that permeates the ground, and are badly in need of repairing; Now output a slice experimental plot and test the present invention.
Heavy metal substance in the shitosan class that the present invention is prepared with natural chelators modification and humic acids association complex stable soil and mud, prevents it from moving in underground water and crop.
The super enrichment core accumulation plant that screening and polluted heavy metals match, by adhering to specific microorganism at its root, realizing the parsing to Chelating state heavy metal and absorption also enrichment, regularly gathers in plant and focus on recovery.Black nightshade is heavy metal cadmium over-accumulated plant, and its growth cycle is short, and biomass is large; Have stronger degeneration-resistant border ability, stronger wins honour for, strives water and strives fertile ability; Nourish and grow rapidly, fertility is strong, and biomass such as can be increased sharply at the feature under environmental condition is suitable for situation.Inoculate the Paecilomyces lilacinus and trichoderma viride that screen from refuse landfill soil, bacterial strain has facilitation to black nightshade growth, can strengthen the absorbability of black nightshade to Cd, Pb.The concentration coefficient of black nightshade to Cd can reach 4.25, and its to the concentration coefficient of Pb only up to 0.19.
The selection of industrial crops and plantation: for ensureing the utilization in contaminated ground and the Treatment of Sludge soil be processed, in the effective situation of chelate stabilizing agent, letter value or crop rotation plants economic crops or grain, the utilization in maintenance soil and production.
Embodiment 2: somewhere, Inner Mongolia Autonomous Region irrigated area nickel contamination original position oriented control and rehablitation project;
Middle of Inner Mongolia Irrigated Area Soils biases toward heavy metal pollution, Environmental Quality of Cultivated Land makes people worried, wherein serious pollution point position reaches 1.5%, pollution element is the element such as nickel, mercury, cadmium, chromium, copper mainly, wherein nickel has exceeded nuisanceless place of production normal line, now outputs a slice experimental plot and tests the present invention.
The super enrichment core accumulation plant that screening and polluted heavy metals match, by adhering to specific microorganism at its root, realizing the parsing to Chelating state heavy metal and absorption also enrichment, regularly gathers in plant and focus on recovery.In the soil of nickel contamination, plant front yard mustard, fertility is strong, and under environmental condition is suitable for situation, biomass can be increased sharply.Inoculation trichoderma viride, bacterial strain has facilitation to the growth of front yard mustard, can strengthen the absorbability of front yard mustard to nickel.
The selection of industrial crops and plantation: for ensureing the utilization in contaminated ground and the Treatment of Sludge soil be processed, in the effective situation of chelate stabilizing agent, letter value or crop rotation plants economic crops or grain, the utilization in maintenance soil and production.
The present invention still tests other heavy metal, heavy metal is polluted, as nickel, mercury, cadmium, chromium, copper etc., black nightshade, front yard mustard, red-spotted stonecrop etc. are comprised to the screening of super enrichment core accumulation plant, actinomyces, fungi etc. are comprised to the selection of microorganism, as Paecilomyces lilacinus and trichoderma viride etc., good effect can both be played.
Conclusion: by above experiment, prove this method can well the normal farming and industrial crops and grain that do not stop soil plantation and prevent heavy metal to earth's surface and underground water migration prerequisite under, the technical process of directional separation heavy metal contaminants wherein.
Claims (3)
1. the process of the directional separation of a soil and Heavy Metals in Sludge, it is characterized in that: heavy metal has the planting of hyperaccumulation on soil or mud, add certain chelate stabilizing agent simultaneously, promote the absorption of plant heavy metal and prevent its water that permeates the ground, and not stopping the normal farming in soil and the plantation of industrial crops and grain simultaneously; The technique of directional separation is divided into three steps:
(1) preparation of chelate stabilizing agent: the heavy metal substance in the shitosan class prepared with natural chelators modification and humic acids association complex stable soil and mud, prevents it from moving in underground water and crop;
(2) screening of directed super enriching plant: the super enrichment core accumulation plant that screening and polluted heavy metals match, by adhering to specific microorganism at its root, realize the parsing to Chelating state heavy metal and absorption also enrichment, regularly plant gathered in and focus on recovery;
(3) selection of industrial crops and plantation: for ensureing the utilization in contaminated ground and the Treatment of Sludge soil be processed, in the effective situation of chelate stabilizing agent, letter value or crop rotation plants economic crops or grain, the utilization in maintenance soil and production.
2. the process of the directional separation of soil according to claim 1 and Heavy Metals in Sludge, is characterized in that: in step (2), the screening of directed super enriching plant comprises: choose black nightshade to cadmium pollution; Front yard mustard is chosen to nickel contamination; Red-spotted stonecrop is chosen to mercury, chromium, Cu-W ore deposit.
3. the process of the directional separation of soil according to claim 1 and Heavy Metals in Sludge, is characterized in that: in step (2), and choosing of microorganism comprises actinomyces and fungi, can realize parsing that heavy metal carries out and absorb and enrichment.
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| CN201410670964.7A CN104475434A (en) | 2014-11-21 | 2014-11-21 | Technological method for directionally separating heavy metal in soil and sludge |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946542A (en) * | 2015-06-18 | 2015-09-30 | 河南农业大学 | Screening method for fungi with heavy metal enrichment capacity |
| CN105087943A (en) * | 2015-09-18 | 2015-11-25 | 韶关朗润环保科技有限公司 | Process for recovering heavy metal from heavy metals contaminated soil by biological method |
| CN106938275A (en) * | 2017-03-22 | 2017-07-11 | 中国石油大学(华东) | Pyrolysis bio-oils produce chromium-polluted soil biofluid humic acid in-situ immobilization agent |
| CN107520248A (en) * | 2017-09-12 | 2017-12-29 | 贵州省草业研究所 | A kind of method that crops repair farmland mercury contaminated soil |
| CN108675883A (en) * | 2018-08-07 | 2018-10-19 | 湖南艾布鲁环保科技股份有限公司 | Soil activating agent, preparation method and its application for cadmium pollution soil repair |
| CN109734263A (en) * | 2017-10-31 | 2019-05-10 | 中环沃野环保有限公司 | A method of domestic sludge is quickly repaired using CPPM collaboration recovery scenario |
| CN110665948A (en) * | 2018-07-03 | 2020-01-10 | 河南理工大学 | Ecological restoration method suitable for heavy metal contaminated soil in multiple regions |
| CN111302584A (en) * | 2020-04-23 | 2020-06-19 | 南昌鑫淼源环保有限公司 | Municipal sludge treatment system |
| CN111687195A (en) * | 2020-05-29 | 2020-09-22 | 浙江大学 | Preparation of compost humus and method for restoring cadmium-polluted soil by using compost humus and combined plants |
| CN113351639A (en) * | 2021-02-25 | 2021-09-07 | 广州穗土环保工程有限公司 | Method for effectively reducing leaching concentration of composite heavy metal |
| CN113732051A (en) * | 2021-09-15 | 2021-12-03 | 河南省科学院高新技术研究中心 | Method for restoring farmland polluted by heavy metals |
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| CN103990647A (en) * | 2014-05-12 | 2014-08-20 | 华南师范大学 | Method of enhancing cadmium absorption of black nightshade from soil by utilization of arbuscular mycorrhizal fungi |
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Patent Citations (4)
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| CN101116865A (en) * | 2007-08-31 | 2008-02-06 | 浙江大学 | Method for producing and restoring vegetables growing in the heavy metal mildly-polluted soil |
| CN102580987A (en) * | 2012-01-18 | 2012-07-18 | 浙江大学 | Method for improving phytoremediation efficiency of farmland soil with light cadmium pollution by using potash fertilizer |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946542A (en) * | 2015-06-18 | 2015-09-30 | 河南农业大学 | Screening method for fungi with heavy metal enrichment capacity |
| CN105087943A (en) * | 2015-09-18 | 2015-11-25 | 韶关朗润环保科技有限公司 | Process for recovering heavy metal from heavy metals contaminated soil by biological method |
| CN106938275A (en) * | 2017-03-22 | 2017-07-11 | 中国石油大学(华东) | Pyrolysis bio-oils produce chromium-polluted soil biofluid humic acid in-situ immobilization agent |
| CN107520248A (en) * | 2017-09-12 | 2017-12-29 | 贵州省草业研究所 | A kind of method that crops repair farmland mercury contaminated soil |
| CN109734263A (en) * | 2017-10-31 | 2019-05-10 | 中环沃野环保有限公司 | A method of domestic sludge is quickly repaired using CPPM collaboration recovery scenario |
| CN110665948A (en) * | 2018-07-03 | 2020-01-10 | 河南理工大学 | Ecological restoration method suitable for heavy metal contaminated soil in multiple regions |
| CN108675883A (en) * | 2018-08-07 | 2018-10-19 | 湖南艾布鲁环保科技股份有限公司 | Soil activating agent, preparation method and its application for cadmium pollution soil repair |
| CN111302584A (en) * | 2020-04-23 | 2020-06-19 | 南昌鑫淼源环保有限公司 | Municipal sludge treatment system |
| CN111687195A (en) * | 2020-05-29 | 2020-09-22 | 浙江大学 | Preparation of compost humus and method for restoring cadmium-polluted soil by using compost humus and combined plants |
| CN113351639A (en) * | 2021-02-25 | 2021-09-07 | 广州穗土环保工程有限公司 | Method for effectively reducing leaching concentration of composite heavy metal |
| CN113732051A (en) * | 2021-09-15 | 2021-12-03 | 河南省科学院高新技术研究中心 | Method for restoring farmland polluted by heavy metals |
| CN113732051B (en) * | 2021-09-15 | 2022-08-02 | 河南省科学院高新技术研究中心 | Method for restoring farmland polluted by heavy metals |
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Application publication date: 20150401 |