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Fixing agent and method for safely disposing heavy metal polluted soil repairing plant

A technology for polluted soil and plant restoration, applied in the field of resources and environment, can solve the problems of less research on post-processing technology and lack of practical process application, and achieve the effect of simple and convenient operation, solving the problem of safe disposal and easy implementation.

Active Publication Date: 2011-07-27
广东华农大城市规划设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few researches on post-processing technology of polluted soil phytoremediation harvest, and there is a lack of practical process application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The sugar cane planted in heavy metal polluted soil contains heavy metal bagasse after being squeezed. It has been determined that the cadmium content is 0.99mg / kg, the lead content is 1.83mg / kg, the copper content is 10.20mg / kg, and the zinc content is 98.3mg. / kg, add its weight 1% fixing agent in bagasse, described heavy metal fixing agent is the solid particle that calcium phosphate ore and bentonite are mixed according to the ratio of 1: 1, bagasse and fixing agent are placed in rotary kiln and incinerated , through the tracking and determination of cadmium, lead, copper and zinc in the ash slag, the final results show that the mass percentages of the measured heavy metal elements are: 91.3% cadmium, 95.2% lead, 92.2% copper, 92.2% copper, Zinc 92.8%. The ash containing heavy metals is collected and returned to the mine to be used as raw material for metal smelting.

Embodiment 2

[0026] Sugarcane planted in heavy metal-polluted soil contains bagasse containing heavy metals after being squeezed. kg, add its weight 8% heavy metal fixing agent in the slag, described heavy metal fixing agent is the solid particle that calcium phosphate ore and bentonite are mixed according to the ratio of 1:3, is placed in the rotary burning kiln and incinerated, by cadmium, lead The trace determination of four heavy metal elements, copper and zinc, the final results show that the mass percentages of the heavy metal elements measured are: 91.8% cadmium, 95.4% lead, 92.9% copper, and 93.0% zinc. The ash containing heavy metals is collected and returned to the mine to be used as raw material for metal smelting.

Embodiment 3

[0028] Dioscorea chrysanthemum planted in heavy metal-polluted soil is extracted from saponin, fermented to produce ethanol, and then dried to obtain the fermented residue of diosminum chrysanthemum containing heavy metals. After determination, the cadmium content in the fermentation residue of Dioscorea chrysanthemum was 0.82mg / kg, the lead content was 2.12mg / kg, the copper content was 7.33mg / kg, and the zinc content was 182.9mg / kg. Add 6% of its weight to the fermentation residue The heavy metal fixative calcium phosphate ore and bentonite mixed solid particles in a ratio of 1:1 were placed in a rotary kiln for incineration. Through the tracking and determination of cadmium, lead, copper and zinc, the four heavy metal elements, the final results showed that the The mass percentages of heavy metal elements being adsorbed and deposited are: 90.8% cadmium, 93.5% lead, 93.2% copper, and 94.2% zinc. The ash containing heavy metals is collected and returned to the mine to be used ...

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Abstract

The invention discloses a fixing agent and a method for safely disposing a heavy metal polluted soil repairing plant. The fixing agent comprises calcium phosphate ore and bentonite. The fixing agent is added into a heavy metal polluted soil repairing plant to be burnt according to proper amount for being burnt, heavy metal can be successfully precipitated in ash for recycle, and the secondary pollution is prevented.

Description

technical field [0001] The invention belongs to the technical field of resources and environment, and relates to a safe disposal technology of heavy metal-contaminated soil remediation plants, specifically to fix heavy metal elements such as copper, cadmium, lead, and zinc in the incineration of accumulated heavy metal remediation plants, and prevent them from being discharged through flue gas. Safe disposal methods for secondary pollution. Background technique [0002] Since the 1980s, phytoremediation has entered the stage of industrialization due to its permanent treatment effect, in-situ treatment process, low treatment cost, and environmental aesthetic compatibility. However, there are few research reports at home and abroad on the disposal of accumulated heavy metal remediation plants. [0003] The corresponding post-processing technologies for energy trees and bagasse mainly include incineration, composting, landfill, pyrolysis, and liquid phase extraction. [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/06
Inventor 陈晓阳谢君陈国涛徐宁冯蕾罗思施徐晓立
Owner 广东华农大城市规划设计院有限公司
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