Soil remediation agent, preparation method and applications thereof

A soil remediation agent and soil technology, applied in the restoration of polluted soil, application, soil conditioning materials, etc., can solve the problems of easy aggregation and oxidation of FeS nanoparticles, and achieve the prevention of aggregation, easy control, and stabilization high effect

Inactive Publication Date: 2020-02-11
NANJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, in the actual application process, FeS nanoparticles are extr...

Method used

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  • Soil remediation agent, preparation method and applications thereof

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Embodiment 1

[0024] Example 1: Preparation of a soil improvement and restoration agent for heavy metal polluted soil

[0025] In the present embodiment, dissolved organic matter (DOM) is humic acid (HA), and configuration mass percentage composition is the humic acid solution of 1%; Ferrous ammonium sulfate (((NH 4 ) 2 Fe(SO 4 ) 2 ) solution concentration is 5mol / L; sodium sulfide (Na 2 S) concentration is 10mol / L.

[0026] Under normal temperature and anaerobic conditions, sodium sulfide solution is slowly added dropwise to the solution containing dissolved organic matter and ferrous ammonium sulfate, DOM(HA):(NH 4 ) 2 Fe(SO 4 ) 2 :Na 2 The volume ratio of S is 12:2:1, stirring (300rpm) while adding dropwise, and ultrasonic dispersion at the same time. The ultrasonic frequency is 40kHZ. After 60 minutes of reaction, the dissolved organic matter-ferrous sulfide nanoparticle suspension is obtained, which is the heavy metal Contaminated soil remediation agent. figure 1 B is the sca...

Embodiment 2

[0031] Embodiment 2: Preparation of a soil improvement and restoration agent for heavy metal polluted soil

[0032] In the present embodiment, dissolved organic matter (DOM) is tannic acid (TA), and configuration mass percentage composition is the humic acid solution of 1.5%; Ferrous ammonium sulfate (((NH 4 ) 2 Fe(SO 4 ) 2 ) solution concentration is 5mol / L; sodium sulfide (Na 2 S) concentration is 10mol / L.

[0033] Under normal temperature and anaerobic conditions, slowly add sodium sulfide solution dropwise to the solution containing dissolved organic matter and ferrous ammonium sulfate, DOM(TA):(NH 4 ) 2 Fe(SO 4 ) 2 :Na 2 The volume ratio of S is 12:2:1, stirring (300rpm) while adding dropwise, and ultrasonic dispersion at the same time. The ultrasonic frequency is 40kHZ. After 60 minutes of reaction, the dissolved organic matter-ferrous sulfide nanoparticle suspension is obtained, which is the heavy metal Contaminated soil remediation agent.

[0034] The soil re...

Embodiment 3

[0038] Embodiment 3: a kind of soil improvement repairing agent preparation for heavy metal polluted soil

[0039] In the present embodiment, dissolved organic matter (DOM) is humic acid (HA), and configuration mass percentage composition is the humic acid solution of 2.5%; Ferrous ammonium sulfate (((NH 4 ) 2 Fe(SO 4 ) 2 ) solution concentration is 4.5mol / L; sodium sulfide (Na 2 S) concentration is 9mol / L.

[0040] Under normal temperature and anaerobic conditions, sodium sulfide solution is slowly added dropwise to the solution containing dissolved organic matter and ferrous ammonium sulfate, DOM:(NH 4 ) 2 Fe(SO 4 ) 2 :Na 2 The volume ratio of S is 12:2:1, stirring (300rpm) while adding dropwise, and ultrasonic dispersion at the same time. The ultrasonic frequency is 40kHZ. After 60 minutes of reaction, the dissolved organic matter-ferrous sulfide nanoparticle suspension is obtained, which is the heavy metal Contaminated soil remediation agent.

[0041] The soil re...

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Abstract

The invention discloses a soil remediation agent, a preparation method and applications thereof, wherein the soil remediation agent is a soluble organic matter-ferrous sulfide nanoparticle suspensionliquid, the mass percentage concentration of the soluble organic matter is 0.06-0.4%, the soluble organic matter is one or a plurality of materials selected from humic acid, fulvic acid and tannic acid, and the particle size of the ferrous sulfide nanoparticles is 150-250 nm. According to the invention, the soil remediation agent is applied to remediation of heavy metal contaminated soil, has slow-release removal effect on heavy metals in heavy metal contaminated soil, can efficiently treat soil containing heavy metals such as chromium, arsenic, lead, zinc and the like in a low consumption manner, and has great popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of soil treatment, and the invention relates to a soil remediation agent, a preparation method and an application. Background technique [0002] In recent years, with the continuous acceleration of industrialization, the irrational exploitation of mineral resources, long-term sewage irrigation and sludge application, atmospheric subsidence caused by human activities, and the application of chemical fertilizers and pesticides have caused serious soil pollution, especially Heavy metal pollution. The main types of heavy metal pollution in farmland soil are mainly compound pollution of various heavy metal elements such as cadmium-copper, arsenic-cadmium-lead, lead-cadmium-zinc, etc. According to the research, improving soil heavy metal pollution through the application of remediation agent is a new treatment method with low cost, controllable remediation, and meeting the needs of environmentally friendly develo...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08C09K101/00
CPCB09C1/08B09C2101/00C09K17/40C09K2101/00
Inventor 李时银米纳姚有如阴俐李晶何欢杨绍贵
Owner NANJING NORMAL UNIVERSITY
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