CN112322301A - Composite soil conditioner and application thereof - Google Patents
Composite soil conditioner and application thereof Download PDFInfo
- Publication number
- CN112322301A CN112322301A CN202011058490.2A CN202011058490A CN112322301A CN 112322301 A CN112322301 A CN 112322301A CN 202011058490 A CN202011058490 A CN 202011058490A CN 112322301 A CN112322301 A CN 112322301A
- Authority
- CN
- China
- Prior art keywords
- magnesium
- peroxide
- soil
- soil conditioner
- heavy metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/38—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by oxidation; by combustion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C7/00—Fertilisers containing calcium or other cyanamides
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/26—Organic substances containing nitrogen or phosphorus
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/28—Organic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of soil conditioning, and particularly relates to a composite soil conditioner and application thereof. The invention relates to a composite soil conditioner which comprises, by mass, 15-45 parts of peroxide, 15-30 parts of a magnesium cyanamide compound and 25-70 parts of a dispersing aid. The invention uses peroxide as oxidant, and magnesium cyanamide compound as catalyst, and the process of degrading organic pollutant can not produce iron mud, and does not introduce poisonous metal component, and the magnesium oxide in the magnesium cyanamide compound material has strong adsorption property, can adsorb heavy metal and realize the stabilization of heavy metal ion, and has good effect on the stabilization of heavy metal ion in soil.
Description
Technical Field
The invention belongs to the technical field of soil conditioning, and particularly relates to a composite soil conditioner and application thereof.
Background
With the rapid development of modern industry and agriculture, a large amount of industrial wastes and domestic garbage containing organic pollutants and heavy metals enter soil, and a large amount of chemical fertilizers and pesticides are unreasonably used, so that the soil structure is damaged, the soil fertility is reduced, the physical and chemical properties of the soil are changed, and the yield is reduced. The pollutants have strong toxicity in soil, are difficult to naturally degrade and easy to enrich, and cause serious harm to human health and ecological systems. It is therefore very valuable to remediate and condition these contaminated lands.
Currently, chemical remediation is often used to remediate organic matter and heavy metal contamination in soil as a common soil remediation technology. CN 110846046A discloses a compound repairing agent for organic contaminated soil, a preparation method and application thereof, and particularly discloses that calcium peroxide coated with polyhydroxy fatty acid and polylactic acid is used as an active component, nano copper peroxide is used as a catalyst to effectively decompose and oxidize organic matters, although various organic matters can be efficiently degraded, transition metal copper and organic matters are introduced at the same time to cause secondary pollution.
CN 108998042A discloses a soil conditioner for passivating and restoring heavy metal pollution of farmland soil and a preparation method thereof, and particularly discloses that ore is used as the soil conditioner for processing heavy metal pollution, the effect of passivating heavy metal can be achieved by increasing the pH value and complexing heavy metal, but toxic and harmful heavy metal contained in mineral substances can easily enter soil along with entering soil to bring secondary pollution. Although the conditioners can play a good role in repairing soil pollution, new pollutants are inevitably introduced to cause secondary pollution, the action types are single, only one pollution type of soil can be treated generally, when the conditioner faces to the treatment of soil compositely polluted by multiple pollution sources, multiple different soil conditioners are required to be added, the operation is complex, and great challenges are brought to the environment bearing capacity of the soil. Therefore, it is urgently needed to develop a soil conditioner for treating organic matters and heavy metal pollution to solve the problem of soil combined pollution.
CN 104327859 discloses a soil in-situ remediation agent for synchronously treating heavy metal and organic matter pollution, and particularly discloses a soil remediation agent for simultaneously removing heavy metal and organic pollutants, but organic flocculants and ferric oxide are used in raw materials, so that adverse effects on soil structure and fertility are generated, and the introduction of iron components also has the risk of secondary pollution.
In conclusion, the prior art still lacks of a soil in-situ remediation agent which can treat organic matter and heavy metal pollution and does not bring secondary pollution.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a composite soil conditioner, which aims to solve the problem of organic pollution through the reaction of peroxide and organic matters, wherein a magnesium cyanamide composite material contains magnesium oxide and magnesium cyanamide, has strong adsorption performance, can adsorb heavy metals and realize the stabilization of heavy metal ions, thereby solving the technical problems of heavy metal pollution and organic pollution without bringing secondary pollution. The detailed embodiment of the present invention is as follows.
A composite soil conditioner comprises, by mass, 15-45 parts of peroxide, 15-30 parts of a magnesium cyanamide compound and 25-70 parts of a dispersing aid.
The invention uses peroxide as oxidant and magnesium cyanamide compound as catalyst, which can decompose organic matter in soil, with the following reaction mechanism.
MO2+H2O→H2O2+M(OH)2 
ROS+organics→CO2+H2O
Preferably, the mass ratio of the peroxide to the magnesium cyanamide compound is (1-3) to (1-2).
Preferably, the peroxide comprises a mixture of one or more of metal peroxide and non-metal peroxide, and the metal peroxide is nanoscale metal peroxide. The nano material has many surface oxidation active sites and high active oxygen content, and is beneficial to uniform dispersion in soil.
Preferably, the metal peroxide is one or more of magnesium peroxide, calcium peroxide and zinc peroxide.
Preferably, the magnesium cyanamide compound is prepared by the following method: fully and uniformly mixing at least one of melamine, thiourea and urea with at least one of magnesium oxide, magnesium hydroxide, basic magnesium carbonate, magnesium ethoxide, magnesium acetate and magnesium carbonate, calcining for 1h-3h at the temperature of 400-650 ℃, and cooling to obtain the magnesium cyanamide compound.
Preferably, the magnesium cyanamide compound is a magnesium oxide/magnesium cyanamide compound, and the particle size is 20-100 nm.
Preferably, the dispersing auxiliary agent is one or a mixture of more of charcoal powder, straw powder, limestone powder, raw soil powder and animal waste dry powder.
The invention also protects the application of the soil conditioner, and the soil conditioner is used for organic matter pollution treatment, heavy metal pollution treatment and original/ex-situ remediation of composite contaminated soil in soil.
The invention has the following beneficial effects:
(1) the invention uses peroxide as oxidant, the magnesium cyanamide compound is used as novel Fenton-like system of the catalyst, will not produce iron mud in the course of degrading organic pollutant, does not introduce the poisonous metal component, the magnesium cyanamide composite material has very strong adsorption performance, can absorb heavy metal and realize the stability to heavy metal ion, have better effects to the stability of heavy metal ion in the soil, through the synergistic reaction of every ingredient, while providing the compost, can absorb free heavy metal effectively and realize stabilizing and degrading the organic pollutant difficult to biodegrade;
(2) the peroxide can continuously and slowly release oxygen in a humid environment or water, the oxygen content in soil is increased, and oxygen fertilizer required by plant growth is provided;
(3) the invention has wide range of applicable heavy metal and organic pollutants, can not generate iron mud and introduce no toxic metal ions, can realize the original/ex-situ remediation of the composite polluted soil, has simple implementation mode, does not influence the normal cultivation of the soil, and is beneficial to popularization and use.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
Preparation example preparation of magnesium cyanamide Complex
1g of thiourea and 0.5g of basic magnesium carbonate are weighed and mixed uniformly in a mortar, then the mixture is transferred into a crucible with a cover and the capacity of 30mL, and a layer of aluminum-tin-foil paper is wrapped outside the crucible. And finally, putting the crucible into a muffle furnace, heating to 550 ℃ at the speed of 10 ℃/min, preserving the heat for 2h, cooling to 80 ℃ along with the furnace, and sampling to obtain the magnesium cyanamide composite material.
Examples of the invention
Example 1
Weighing 50g of soil polluted by methyl orange and heavy metal cadmium, adding a mixture consisting of 0.5g of magnesium cyanamide compound and 2.5g of straw powder, uniformly stirring, adding 5g of 30% hydrogen peroxide, uniformly mixing, standing for one week, and detecting the content of the methyl orange and the heavy metal cadmium.
Example 2
Weighing 50g of soil polluted by methyl orange and heavy metal cadmium, adding a mixture consisting of 0.5g of magnesium peroxide, 0.5g of magnesium cyanamide compound and 2g of charcoal powder, uniformly mixing, standing for one week, and detecting the content of the methyl orange and the heavy metal cadmium.
Example 3
Weighing 50g of soil polluted by methyl orange and heavy metal cadmium, adding a mixture consisting of 0.5g of calcium peroxide, 0.5g of magnesium cyanamide compound and 3g of limestone powder, uniformly mixing, standing for one week, and detecting the content of the methyl orange and the heavy metal cadmium.
Example 4
Weighing 50g of soil polluted by methyl orange and heavy metal cadmium, adding a mixture consisting of 1g of magnesium peroxide, 0.5g of magnesium cyanamide compound, 1.0g of charcoal powder, 0.4g of straw powder and 0.4g of limestone powder, uniformly mixing, standing for one week, and detecting the content of the methyl orange and the heavy metal cadmium.
Example 5
Weighing 50g of soil polluted by methyl orange and heavy metal cadmium, adding a mixture consisting of 0.5g of magnesium peroxide, 1g of magnesium cyanamide compound and 2.5g of raw soil powder, uniformly mixing, standing for one week, and detecting the content of the methyl orange and the heavy metal cadmium.
Example 6
Weighing 50g of soil polluted by tetracycline and heavy metal lead, adding a mixture consisting of 0.5g of magnesium peroxide, 0.5g of magnesium cyanamide compound and 2g of animal waste dry powder, uniformly mixing, standing for one week, and detecting the content of tetracycline and heavy metal lead.
Example 7
Weighing 50g of soil polluted by tetracycline and heavy metal cadmium, adding a mixture consisting of 0.5g of magnesium peroxide, 0.5g of magnesium cyanamide compound, 1.2g of charcoal powder and 1g of raw soil powder, uniformly mixing, standing for one week, and detecting the content of tetracycline and heavy metal cadmium.
Example 8
Weighing 50g of soil polluted by methyl orange and heavy metal cadmium, adding a mixture consisting of 0.3g of magnesium peroxide, 0.2g of zinc peroxide, 0.5g of magnesium cyanamide compound, 1.2g of charcoal powder, 1g of limestone powder and 1g of animal waste dry powder, uniformly mixing, standing for one week, and detecting the content of the methyl orange and the heavy metal cadmium.
Example 9
Weighing 50g of soil polluted by polycyclic aromatic hydrocarbon and heavy metal cadmium, adding a mixture consisting of 0.2g of magnesium peroxide, 0.3g of calcium peroxide, 0.5g of magnesium cyanamide compound, 1g of charcoal powder, 1g of straw powder and 1g of animal waste, uniformly mixing, standing for one week, and detecting the content of polycyclic aromatic hydrocarbon and heavy metal cadmium.
Example 10
Weighing 50g of soil polluted by polycyclic aromatic hydrocarbon and heavy metal cadmium, adding a mixture consisting of 0.3g of magnesium peroxide, 0.2g of calcium peroxide, 0.1g of zinc peroxide, 0.5g of magnesium cyanamide compound, 1.4g of charcoal powder and 1g of straw powder, uniformly mixing, standing for one week, and detecting the content of the polycyclic aromatic hydrocarbon and the heavy metal cadmium.
Test examples
1. And (5) organic matter removal detection test. Extracting organic matters in soil by using an extracting agent, and then measuring the concentration of the organic matters by using a chromatograph, specifically, taking 45mg of soil into a 5mL centrifugal tube, adding 1mL extracting agent, uniformly mixing, carrying out ultrasonic treatment for 20min, placing the centrifugal tube into a centrifuge for centrifugation, taking supernate, filtering the supernate by using a 0.22 mu m organic filter membrane to remove nanoparticles, obtaining an organic matter solution, and testing by using the chromatograph.
2. And (5) testing the content of heavy metal. The detection of the heavy metal is determined by adopting a diethylenetriamine pentaacetic acid (DTPA) leaching-atomic absorption method, specifically, the air-dried restored soil is taken to be placed in a plastic bottle, 20mL of DTPA extractant is added, the vibration is carried out for 2h, the supernatant is obtained by filtration, and the determination is carried out by using an atomic absorption spectrophotometer.
The main parameters and test results of examples 1-10 are shown in table 1.
TABLE 1 test results table
Results and discussion.
The result shows that the removal effect of the organic matters is the best when the ratio of the oxidant to the catalyst is 2:1, and can reach 93%. The stability of the peroxide mixture system to the active heavy metal ions can reach more than 50 percent. Therefore, the fact that the novel Fenton-like system with peroxide as an oxidant and a magnesium cyanamide compound as a catalyst is used for degrading organic pollutants in soil is proved, and meanwhile, the magnesium oxide in the magnesium cyanamide compound serving as a stronger adsorbent can also realize the stability of active heavy metal ions in the soil.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The composite soil conditioner is characterized by comprising 15-45 parts of peroxide, 15-30 parts of magnesium cyanamide compound and 25-70 parts of dispersing aid by mass.
2. The soil conditioner of claim 1, wherein the mass ratio of the peroxide to the magnesium cyanamide complex is (1-3) to (1-2).
3. The soil conditioner of claim 1 or 2, wherein the peroxide comprises a mixture of one or more of a metal peroxide and a non-metal peroxide, and the metal peroxide is a nanoscale metal peroxide.
4. The soil conditioner of claim 3, wherein the metal peroxide is a mixture of one or more of magnesium peroxide, calcium peroxide, and zinc peroxide.
5. The soil conditioner according to claim 1 or 2, wherein the magnesium cyanamide compound is prepared by the following method: fully and uniformly mixing at least one of melamine, thiourea and urea with at least one of magnesium oxide, magnesium hydroxide, basic magnesium carbonate, magnesium ethoxide, magnesium acetate and magnesium carbonate, calcining for 1h-3h at the temperature of 400-650 ℃, and cooling to obtain the magnesium cyanamide compound.
6. The soil conditioner of claim 5, wherein the magnesium cyanamide complex is a magnesium oxide/magnesium cyanamide complex having a particle size of 20-100 nm.
7. The soil conditioner of claim 1, wherein the dispersing aid is one or more of charcoal powder, straw powder, limestone powder, raw soil powder and animal waste dry powder.
8. Use of a soil conditioner according to any one of claims 1 to 7, wherein the use includes use in organic pollution remediation, heavy metal pollution remediation and in situ/ex situ remediation of complex contaminated soil in the soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011058490.2A CN112322301A (en) | 2020-09-30 | 2020-09-30 | Composite soil conditioner and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011058490.2A CN112322301A (en) | 2020-09-30 | 2020-09-30 | Composite soil conditioner and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112322301A true CN112322301A (en) | 2021-02-05 |
Family
ID=74313317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011058490.2A Pending CN112322301A (en) | 2020-09-30 | 2020-09-30 | Composite soil conditioner and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112322301A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113245359A (en) * | 2021-05-28 | 2021-08-13 | 深圳市天健水环境工程科技有限公司 | Method for simultaneously treating heavy metal and organic pollutants in soil |
| CN114479876A (en) * | 2022-03-04 | 2022-05-13 | 广东省农业科学院农业资源与环境研究所 | Conditioner special for acid field and capable of inhibiting negative effect of straw returning and application of conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583440A (en) * | 2016-12-22 | 2017-04-26 | 常州大学 | Method for synergistically remediating soil contaminated by organo-chlorine pesticide through nanoscale zero-valent iron/calcium peroxide |
| CN107214188A (en) * | 2017-06-02 | 2017-09-29 | 常州大学 | A kind of method of BHC in potassium ferrate collaboration calper calcium peroxide degraded soil elution liquid |
| CN108380663A (en) * | 2018-04-25 | 2018-08-10 | 上海化工研究院有限公司 | The method that class Fenton oxidation method removes half volatile organic contaminant in soil |
| CN109304363A (en) * | 2018-10-29 | 2019-02-05 | 东华大学 | A kind of chemical remediation medicament and its application method suitable for oil-polluted soils |
| CN109701587A (en) * | 2018-12-24 | 2019-05-03 | 华中科技大学 | Cyanamide magnesium compound and preparation method thereof and the application as class Fenton catalysis material |
-
2020
- 2020-09-30 CN CN202011058490.2A patent/CN112322301A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583440A (en) * | 2016-12-22 | 2017-04-26 | 常州大学 | Method for synergistically remediating soil contaminated by organo-chlorine pesticide through nanoscale zero-valent iron/calcium peroxide |
| CN107214188A (en) * | 2017-06-02 | 2017-09-29 | 常州大学 | A kind of method of BHC in potassium ferrate collaboration calper calcium peroxide degraded soil elution liquid |
| CN108380663A (en) * | 2018-04-25 | 2018-08-10 | 上海化工研究院有限公司 | The method that class Fenton oxidation method removes half volatile organic contaminant in soil |
| CN109304363A (en) * | 2018-10-29 | 2019-02-05 | 东华大学 | A kind of chemical remediation medicament and its application method suitable for oil-polluted soils |
| CN109701587A (en) * | 2018-12-24 | 2019-05-03 | 华中科技大学 | Cyanamide magnesium compound and preparation method thereof and the application as class Fenton catalysis material |
Non-Patent Citations (3)
| Title |
|---|
| 张二勇: "《地下水氯代烃污染羽原位修复》", 31 March 2015, 地质出版社 * |
| 徐炎华: "《环境保护概论》", 31 December 2009, 中国水利水电出版社 * |
| 郭春梅: "《环境工程概论》", 31 May 2018, 中国石油大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113245359A (en) * | 2021-05-28 | 2021-08-13 | 深圳市天健水环境工程科技有限公司 | Method for simultaneously treating heavy metal and organic pollutants in soil |
| CN114479876A (en) * | 2022-03-04 | 2022-05-13 | 广东省农业科学院农业资源与环境研究所 | Conditioner special for acid field and capable of inhibiting negative effect of straw returning and application of conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rinklebe et al. | Redox-induced mobilization of Ag, Sb, Sn, and Tl in the dissolved, colloidal and solid phase of a biochar-treated and un-treated mining soil | |
| Huang et al. | In situ remediation of mercury-contaminated soil using thiol-functionalized graphene oxide/Fe-Mn composite | |
| Wu et al. | Arsenic sorption by red mud-modified biochar produced from rice straw | |
| Song et al. | Leaching behavior of heavy metals from sewage sludge solidified by cement-based binders | |
| Sahu et al. | Response surface modeling and optimization of chromium (VI) removal from aqueous solution using Tamarind wood activated carbon in batch process | |
| Bhatnagar et al. | Vanadium removal from water by waste metal sludge and cement immobilization | |
| Hazrati et al. | Functionalization of ultrasound enhanced sewage sludge-derived biochar: Physicochemical improvement and its effects on soil enzyme activities and heavy metals availability | |
| Khokhotva et al. | The influence of dissolved organic carbon on sorption of heavy metals on urea-treated pine bark | |
| Bhatnagar et al. | Adsorptive removal of 2, 4-dichlorophenol from water utilizing Punica granatum peel waste and stabilization with cement | |
| Mohamadiun et al. | Removal of cadmium from contaminated soil using iron (III) oxide nanoparticles stabilized with polyacrylic acid | |
| CN111944538A (en) | Stabilizer for repairing soil cadmium, lead and arsenic combined pollution and preparation method thereof | |
| CN112322301A (en) | Composite soil conditioner and application thereof | |
| Cao et al. | Removal of Pb, Zn, and Cd from contaminated soil by new washing agent from plant material | |
| Azari et al. | Reducing As availability in calcareous soils using nanoscale zero valent iron | |
| Sun et al. | Characterization of Hg0 re-emission and Hg2+ leaching potential from flue gas desulfurization (FGD) gypsum | |
| Liyun et al. | The characteristics of steel slag and the effect of its application as a soil additive on the removal of nitrate from aqueous solution | |
| Ghasemzadeh et al. | The removal of lead and nickel from the composted municipal waste and sewage sludge using nanoscale zero-valent iron fixed on quartz | |
| WO2019212418A1 (en) | A method and system for heavy metal immobilization | |
| Kiurski et al. | Adsorption efficiency of low-cost materials in the removal of Zn (II) ions from printing developer | |
| Yao et al. | Effects of organic acids on heavy metal release or immobilization in contaminated soil | |
| JP6850634B2 (en) | How to purify mercury-contaminated soil | |
| CN106242013B (en) | Method for treating heavy metal ion-containing wastewater by mixing natural pyrrhotite and zero-valent iron | |
| Ha et al. | Remediation of arsenic contaminated water and soil using mechanically (ball milling) activated and pyrite-amended electrolytic manganese slag | |
| Pang et al. | Adsorption of chromium (VI) onto activated carbon modified with KMnO4 | |
| Zhan et al. | A study on the competitive adsorption process of NH4+ and Zn2+ on activated carbon and zeolite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |