CN108264649A - A kind of recovery method of environment protection type soil eluent PASP - Google Patents

A kind of recovery method of environment protection type soil eluent PASP Download PDF

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Publication number
CN108264649A
CN108264649A CN201810052684.8A CN201810052684A CN108264649A CN 108264649 A CN108264649 A CN 108264649A CN 201810052684 A CN201810052684 A CN 201810052684A CN 108264649 A CN108264649 A CN 108264649A
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China
Prior art keywords
pasp
eluent
recovery method
soil
liquid
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CN201810052684.8A
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CN108264649B (en
Inventor
胡晓钧
汪波
姜伟杰
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Shanghai Institute of Technology
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Shanghai Institute of Technology
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
    • C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Abstract

The invention discloses a kind of recovery methods of environment protection type soil eluent PASP.It is as follows：The pH value of contaminated soil eluent is adjusted between 7.0~7.5 using pH adjusting agent；18 heavy metal chelating agents of TMT are added in contaminated soil eluent, stir 1~5h；1~3h is stood after stirring, separation of solid and liquid obtains liquid；Potassium chloride is added in into the liquid of step (3) to saltout, is obtained, and obtained sediment drying, i.e. recycling obtains environment protection type soil eluent PASP.The present invention realizes the quick recycling to environmentally-friendly eluent PSAP using 18 heavy metal chelating agents of TMT and salting-out method, and the rate of recovery of Soil leaching agent PASP is up to more than 80%, and cost recovery is low, easy to operate and feasible, will not cause secondary pollution.

Description

A kind of recovery method of environment protection type soil eluent PASP
Technical field
The present invention relates to Soil leaching recovery technique, more particularly to a kind of recycling side of environment protection type soil eluent PASP Method.
Background technology
According to statistics, in past over half a century, the cadmium in about 2.2 ten thousand tons of the whole world, 93.9 ten thousand tons of copper, 78.3 ten thousand In the lead and the heavy metals emissions to soil for the survival of mankind such as 1,350,000 tons of zinc of ton, which part with waste water, rainwater and Other approach are penetrated into soil, over time, already lead to country variant on the earth with the soil in area by not With the pollution of degree.In Europe, as many as millions of hectares only are had reached by the agricultural land soil area of heavy metal pollution, in Asia Japan, the contaminated area of agricultural land soil has been over 6000 hectares.In some vegetables of Australia and Bangladesh Content of beary metal alreadys exceed the standard of local formulation, Spain's mercury pollution is brought the problem of, has caused local government Concern.However, making people worried, China is also extremely serious by the soil erosion of heavy metal pollution.At present, China's soil is total Exceeding standard rate is 16.1%, the point position exceeding standard rate of wherein cadmium, mercury, arsenic, copper, lead, chromium, zinc and nickel is respectively 7.0%, 1.6%, 2.7%th, 2.1%, 1.5%, 1.1%, 0.9% and 4.8%.
TMT-18 series heavy metal ion agent for capturing is to rely on the Central China University of Science and Technology by Wuhan Bo Ren enlightening Science and Technology Ltd. With the scientific research strength of Hubei University Of Technology, the high-tech water developed with great concentration with reference to the practical water quality condition of Chinese effluent containing heavy metal ions Treatment agent (organic sulfur compound).This product can at normal temperatures in waste water various heavy metal ion (mercury, lead, copper, nickel, manganese, Zinc, chromium etc.) reaction rapidly, generation is not soluble in water, and the chelate with good chemical stability, is removed so as to reach to capture The purpose of heavy metal, especially TMT-18F types, it has nontoxic, odorlessness, will not cause secondary pollution, when putting into a large amount of Water color-changing will not be enabled, suitable for the various occasions for removing removing heavy metals.
PASP (poly-aspartate sodium salt) is a kind of water-soluble high-molecular substance of artificial bionic synthesis, has without phosphorus, nothing Malicious, nuisanceless and biodegradable characteristic is a kind of internationally recognized " green chemical ".Poly-aspartate because containing peptide bond and The design feature of carboxyl isoreactivity group has the stronger performance with heavy metal chelating, and compatibility is fabulous；Therefore it is well suited for Eluent as contaminated soil.Chinese invention patent (CN107011908A) reports correlations of the PASP as Soil leaching agent Situation.In terms of engineer application, from the aspect of cost-effective, after Soil leaching, PASP Soil leachings agent needs are returned It receives, to recycle.
Invention content
The purpose of the present invention is to provide a kind of environment protection type soil eluent PASP recovery method, this method can be fast Soil leaching agent PASP in speed recycling eluent, organic efficiency are high.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of recovery method of environment protection type soil eluent PASP, is as follows：
(1) pH value of contaminated soil eluent is adjusted between 7.0~7.5 using pH adjusting agent；
(2) TMT-18 heavy metal chelating agents are added in contaminated soil eluent, stirs 1~5h；
(3) 1~3h is stood after stirring, separation of solid and liquid obtains liquid；
(4) potassium chloride being added in into the liquid of step (3) to saltout, being obtained, obtained sediment drying, i.e. recycling obtains ring Guarantor's type Soil leaching agent PASP.
In the present invention, in step (1), pH adjusting agent is 4~10wt%NaOH solution or 4~10wt%HNO3Solution.
In the present invention, in step (2), the mass volume ratio of TMT-18 heavy metal chelating agents and contaminated soil eluent is 1:8~1:15g/mL.
In the present invention, in step (2), stir speed (S.S.) is between 160~250 revs/min.
In the present invention, in step (3), separation of solid and liquid uses and is separated by filtration or centrifuges mode.
In the present invention, in step (4), drying temperature is 45~55 DEG C.
Compared to the prior art, the beneficial effects of the present invention are：
The present invention can use TMT-18 to be realized for heavy metal chelating agent and salting-out method to the fast of environmentally-friendly eluent PSAP Speed recycling, the rate of recovery of Soil leaching agent PASP is up to more than 80%, and cost recovery is low, easy to operate and feasible, will not Cause secondary pollution.
Specific embodiment
It describes in detail with reference to embodiment to technical scheme of the present invention.
Embodiment 1
1. use 5%NaOH and 5%HNO3Solution is adjusted the pH value of contaminated soil eluent to 7 for pH adjusting agent, Its eluent derives from Chinese invention patent (CN107011908A) embodiment 2；
2. weigh weight (gram):Contaminated soil eluent (milliliter) is 1:10 TMT-18 heavy metal chelating agents；
3. 10 grams of heavy metal chelating agent TMT-18 are added in 100 milliliters of contaminated soil eluents, then at room temperature with 180 revs/min of rate stirs 2 hours；
4. standing 2 hours, the method for suction filtration filtering removal sediment is used；
5. adding in potassium chloride to saltout, make PASP eluents generation precipitation；
6. solution is placed in centrifuge tube, is centrifuged 10 minutes under 5000 revs/min of rates, topple over supernatant；
7. PASP precipitations are placed in baking oven, dried under the conditions of 50 DEG C, you can the environment protection type soil leaching after being recycled The rate of recovery of lotion PASP, Soil leaching agent PASP pass through differential scanning up to more than 80%, by the Soil leaching agent of recycling Calorimetry (DSC) measures its purity, and the purity of Soil leaching agent PASP is up to more than 80%.
Embodiment 2
1. use 8%NaOH and 8%HNO3Solution for pH adjusting agent by the pH value of contaminated soil eluent adjust to 7.5, eluent derives from Chinese invention patent (CN107011908A) embodiment 1；
2. weigh weight (gram):Contaminated soil eluent (milliliter) is 1:8 TMT-18 heavy metal chelating agents；
3. 50 grams of heavy metal chelating agent TMT-18 are added in 400 milliliters of contaminated soil eluents, then at room temperature with 160 revs/min of rate stirs 2 hours；
4. standing 1 hour, the method for suction filtration filtering removal sediment is used；
5. adding in potassium chloride to saltout, make PASP eluents generation precipitation；
6. solution is placed in centrifuge tube, is centrifuged 10 minutes under 5000 revs/min of rates, topple over supernatant；
7. PASP precipitations are placed in baking oven, dried under the conditions of 50 DEG C, you can the environment protection type soil leaching after being recycled The rate of recovery of lotion PASP, Soil leaching agent PASP pass through differential scanning up to more than 80%, by the Soil leaching agent of recycling Calorimetry (DSC) measures its purity, and the purity of Soil leaching agent PASP is up to more than 80%.
Embodiment 3
1. use 5%NaOH and 5%HNO3Solution is adjusted the pH value of contaminated soil eluent to 7 for pH adjusting agent, Its eluent derives from Chinese invention patent (CN107011908A) embodiment 1；
2. weigh weight (gram):Contaminated soil eluent (milliliter) is 1:15 TMT-18 heavy metal chelating agents；
3. 20 grams of heavy metal chelating agent TMT-18 are added in 300 milliliters of contaminated soil eluents, then at room temperature with 250 revs/min of rate stirs 2 hours；
4. standing 3 hours, the method for suction filtration filtering removal sediment is used；
5. adding in potassium chloride to saltout, make PASP eluents generation precipitation；
6. solution is placed in centrifuge tube, is centrifuged 10 minutes under 5000 revs/min of rates, topple over supernatant；
7. PASP precipitations are placed in baking oven, dried under the conditions of 50 DEG C, you can the environment protection type soil leaching after being recycled The rate of recovery of lotion PASP, Soil leaching agent PASP pass through differential scanning up to more than 80%, by the Soil leaching agent of recycling Calorimetry (DSC) measures its purity, and the purity of Soil leaching agent PASP is up to more than 80%.

Claims (6)

1. a kind of recovery method of environment protection type soil eluent PASP, which is characterized in that be as follows：
(1) pH value of contaminated soil eluent is adjusted between 7.0~7.5 using pH adjusting agent；
(2) TMT-18 heavy metal chelating agents are added in contaminated soil eluent, stirs 1~5h；
(3) 1~3h is stood after stirring, separation of solid and liquid obtains liquid；
(4) potassium chloride being added in into the liquid of step (3) to saltout, being obtained, obtained sediment drying, i.e. recycling obtains environment-friendly type Soil leaching agent PASP.
2. recovery method according to claim 1, which is characterized in that in step (1), pH adjusting agent is 4~10wt% NaOH solution or 4~10wt%HNO3Solution.
3. recovery method according to claim 1, which is characterized in that in step (2), TMT-18 heavy metal chelating agents and dirt The mass volume ratio for contaminating soil elution liquid is 1:8~1:15g/mL.
4. recovery method according to claim 1, which is characterized in that in step (2), stir speed (S.S.) 160~250 turns/ Between minute.
5. recovery method according to claim 1, which is characterized in that in step (3), separation of solid and liquid using being separated by filtration or Centrifugation mode.
6. recovery method according to claim 1, which is characterized in that in step (4), drying temperature is 45~55 DEG C.
CN201810052684.8A 2018-01-19 2018-01-19 Recovery method of environment-friendly soil eluting agent PASP Active CN108264649B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1151702A (en) * 1994-06-28 1997-06-11 耐克麦德英梅金公司 Low viscosity chelating polymers
US20050150419A1 (en) * 2002-07-26 2005-07-14 Jun Zhang Polymeric wood preservative compositions
CN101157861A (en) * 2007-11-07 2008-04-09 华东理工大学 Application of polyaspartic acid in repairing heavy-metal polluted soil
CN107011196A (en) * 2017-05-09 2017-08-04 上海应用技术大学 A kind of recovery method of environment-friendly type IDS Soil leaching agent

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1151702A (en) * 1994-06-28 1997-06-11 耐克麦德英梅金公司 Low viscosity chelating polymers
US20050150419A1 (en) * 2002-07-26 2005-07-14 Jun Zhang Polymeric wood preservative compositions
CN101157861A (en) * 2007-11-07 2008-04-09 华东理工大学 Application of polyaspartic acid in repairing heavy-metal polluted soil
CN107011196A (en) * 2017-05-09 2017-08-04 上海应用技术大学 A kind of recovery method of environment-friendly type IDS Soil leaching agent

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SHAOYU LV ET AL.: ""Multifunctional Environmental Smart Fertilizer Based on L‑Aspartic Acid for Sustained Nutrient Release"", 《JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY》 *
廖冬梅 等: ""三巯基均三嗪三钠盐处理脱硫废水及沉淀产物性质研究"", 《热力发电》 *

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