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Arundo donax resource utilization method for repairing extremely heavy metal contaminated soil

A technology that pollutes soil and heavy metals. It is applied in the fields of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc. It can solve the problems of low utilization rate and low added value of treatment schemes, and achieve the goal of improving economic value. Effect

Active Publication Date: 2019-09-27
YUNCHENG UNIVERISTY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield of biochar obtained by this method is generally 25-75%, the utilization rate is on the low side, and the added value of the follow-up treatment scheme is also on the low side, so it is necessary to remediate the resource utilization method of the plant Arundos arundis polluted by heavy metals do further research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for resource utilization of remedial heavy metal polluted soil, comprising the following steps:

[0033] Step 1, preprocessing;

[0034] After the reed bamboo is cleaned, it is pulverized into blocks or flakes with a particle size of 3-5cm with a pulverizer; according to the characteristics of different densities of the roots, stems and leaves, the roots of the reed bamboo and the roots of the reed bamboo are mixed with flowing water. stem and leaf separation;

[0035] Step 2, the processing method of reed bamboo root;

[0036] A, choose the root position of Arundis reed, it is pulverized to 1-2cm particle diameter, obtains Arundis root particle;

[0037] B. Ammonizing the reed bamboo root granules with an ammoniating reagent, then heating to 2200° C. with steam, and maintaining for 10 minutes to obtain the reed bamboo root granules after ammoniation activation;

[0038] C, the reed bamboo root granules are naturally aired for 1-2 days to remove moisture, th...

Embodiment 2

[0056] A method for resource utilization of remedial heavy metal polluted soil, comprising the following steps:

[0057] Step 1, preprocessing;

[0058] After the reed bamboo is cleaned, it is pulverized into blocks or flakes with a particle size of 3-5cm with a pulverizer; according to the characteristics of different densities of the roots, stems and leaves, the roots of the reed bamboo and the roots of the reed bamboo are mixed with flowing water. stem and leaf separation;

[0059] Step 2, the processing method of reed bamboo root;

[0060] A, choose the root position of Arundis reed, it is pulverized to 1-2cm particle diameter, obtains Arundis root particle;

[0061] B. The ammonification reagent is used to ammonify the reed bamboo root particles, and then heated to 190° C. by steam, and maintained for 12 minutes, to obtain the reed bamboo root particles after ammoniation activation;

[0062] C, the reed bamboo root granules are naturally aired for 1-2 days to remove mo...

Embodiment 3

[0080] A method for resource utilization of remedial heavy metal polluted soil, comprising the following steps:

[0081] Step 1, preprocessing;

[0082] After the reed bamboo is cleaned, it is pulverized into blocks or flakes with a particle size of 3-5cm with a pulverizer; according to the characteristics of different densities of the roots, stems and leaves, the roots of the reed bamboo and the roots of the reed bamboo are mixed with flowing water. stem and leaf separation;

[0083] Step 2, the processing method of reed bamboo root;

[0084] A, choose the root position of Arundis reed, it is pulverized to 1-2cm particle diameter, obtains Arundis root particle;

[0085] B. The ammonification reagent is used to ammonify the reed bamboo root granules, and then heated to 260° C. by steam for 8 minutes to obtain the reed bamboo root granules after ammoniation activation;

[0086] C, the reed bamboo root granules are naturally aired for 1-2 days to remove moisture, then crushed...

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PUM

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Abstract

The invention discloses an arundo donax resource utilization method for repairing extremely heavy metal contaminated soil. For the characteristics of low arundo donax utilization rate and low economic value of a traditional arundo donax resource utilization method, the roots and stem leaves of arundo donax are firstly separated and then carbonized respectively, according to different characteristics of the arundo donax, the arundo donax is made into a finished arundo donax root activated carbon product of an indoor adsorbent for civil use and a finished arundo donax stem leaf activated carbon product for industrial use separately, thereby significantly increasing the economic value of the arundo donax; a recycling mechanism is established, and recycled activated carbon is used for comprehensive utilization of non-ferrous metal metallurgy enterprises.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution, in particular to a method for resource utilization of remedial heavy metal polluted soil. Background technique [0002] At present, Arundo donax is a perennial tall herbaceous plant of the genus Arundo donax in the Poaceae family, with well-developed rhizomes. It has strong adaptability and has a certain tolerance to saline-alkali, drought, and barrenness. It is known as the "pioneer plant" in low-lying saline-alkali land. Arundis not only has the ecological benefits of preventing soil degradation and increasing soil carbon content and organic matter, but also has great potential for remediating heavy metal pollution in wetlands. [0003] However, the rehabilitated Arundos reticulum harvests contain a certain amount of heavy metals, which may cause secondary pollution of heavy metals if not properly disposed of. However, in the prior art, there are few studies on ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/342C01B32/348C01B32/336B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCC01B32/324C01B32/342C01B32/348C01B32/336B01J20/20B01J20/28009C02F1/281C02F2101/308B01J2220/4825
Inventor 刘缙王亚红王娟付蓉徐夏梦李肖凡魏熙呈刘璐
Owner YUNCHENG UNIVERISTY
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