Method for removing and adsorbing heavy metals from ciliate desert-grasses

A technology of centipede grass and heavy metals, which is applied in the field of removing and adsorbing heavy metals in centipede grass, can solve the problems of a large amount of smoke, high extraction cost, and large equipment consumption, and achieve the effect of promoting adsorption

Active Publication Date: 2017-09-29
台州中知英健机械自动化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current follow-up treatment of centipede grass enriched in heavy metals is mainly incineration treatment and leaching treatment. The former has a limited application range due to large equipment consumption, a large amount of smoke and dust, and the inability to recycle heavy metals. The latter is due to its efficient recovery of heavy metals. Highly respected for its ability, but also faces the problem of high extraction cost

Method used

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  • Method for removing and adsorbing heavy metals from ciliate desert-grasses
  • Method for removing and adsorbing heavy metals from ciliate desert-grasses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preliminary preparation:

[0028] Preparation of mercapto-modified sepiolite: in parts by weight, after mixing 100 parts of sepiolite, 3 parts of sodium bicarbonate and 5 parts of sodium acetate, place in a tube furnace, fill with inert gas, and Activation at 200°C and pressure of 0.3MPa for 5h, then add 150 parts of mercaptoacetic acid and 1 part of catalyst, mix well, place in a beaker, react at 100°C for 4h, filter, and wash the filter residue for 3 hours times, and finally after drying, the mercapto-modified sepiolite was obtained.

[0029] Preparation of the mixed bacteria starter: in parts by weight, 12 parts of high temperature bacteria and 10 parts of medium and low temperature bacteria are mixed, and stirred evenly to obtain the mixed bacteria starter.

[0030] The substance prepared above is used in the following method for removing and adsorbing heavy metals from centipede grass.

[0031] 2. A method for removing and adsorbing centipede grass heavy metal...

Embodiment 2

[0036] 1. Preliminary preparation:

[0037] Preparation of mercapto-modified sepiolite: in parts by weight, after mixing 115 parts of sepiolite, 3.5 parts of sodium bicarbonate and 6 parts of sodium acetate, they are placed in a tube furnace, filled with inert gas, and heated at a temperature of Activate at 220°C and 0.35MPa for 6h, then add 160 parts of thioglycolic acid and 1 part of catalyst, mix well, put in a beaker, react at 103°C for 4.5h, filter, and wash the filter residue 3 times, and finally after drying treatment, mercapto-modified sepiolite was obtained.

[0038] Preparation of the mixed bacteria starter: in parts by weight, 16 parts of high temperature bacteria and 15 parts of medium and low temperature bacteria were mixed and stirred evenly to obtain the mixed bacteria starter.

[0039] The substance prepared above is used in the following method for removing and adsorbing heavy metals from centipede grass.

[0040] 2. A method for removing and adsorbing centi...

Embodiment 3

[0045] 1. Preliminary preparation:

[0046] Preparation of mercapto-modified sepiolite: in parts by weight, after mixing 120 parts of sepiolite, 4 parts of sodium bicarbonate and 8 parts of sodium acetate, they are placed in a tube furnace, filled with inert gas, and heated at a temperature of Activate at 240°C and 0.4MPa for 7 hours, then add 165 parts of mercaptoacetic acid and 1 part of catalyst, mix well, place in a beaker, react at 110°C for 5 hours, filter, and wash the filter residue for 3 hours times, and finally after drying, the mercapto-modified sepiolite was obtained.

[0047] Preparation of the mixed bacteria starter: in parts by weight, 20 parts of high-temperature bacteria and 17 parts of medium-low temperature bacteria were mixed and stirred evenly to obtain the mixed bacteria starter.

[0048] The substance prepared above is used in the following method for removing and adsorbing heavy metals from centipede grass.

[0049] 2. A method for removing and adsorb...

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PUM

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Abstract

The invention discloses a method for removing and adsorbing heavy metals from ciliate desert-grasses. The method comprises the following steps: (1) pretreatment of the ciliate desert-grasses: mincing the ciliate desert-grasses, performing hermitical fermentation at 55 to 70 DEG C for 3 to 5 days, adding 3 to 5 parts of a mixed bacteria leavening agent, and performing secondary filtering treatment, thus obtaining filtrate and filter residues; (2) extraction treatment of the filter residues; (3) adsorption treatment: mixing an extracting solution with the filtrate, then putting the mixture into a high pressure reactor, adding mercaptochemical modified sepiolite, heating the mixture to 45 to 52 DEG C, feeding carbon dioxide-nitrogen mixed gas, enabling reaction under conditions that the pressure is 0.8 to 2 MPa and the stirring speed is 100 to 300 r / min for 4 to 7 hours, performing filtering, and obtaining a solid which is heavy metal-enriched modified sepiolite. According to the method disclosed by the invention, the heavy metal-enriched ciliate desert-grasses can be efficiently recycled; a new way is provided for subsequent treatment of the ciliate desert-grasses; and the application prospect of the ciliate desert-grasses is expanded.

Description

【Technical field】 [0001] The invention relates to the field of plant recovery and treatment, in particular to a method for removing and adsorbing heavy metals from centipede grass. 【Background technique】 [0002] In recent years, the problem of heavy metal pollution in the environment has attracted widespread attention. Excessive accumulation of heavy metals in the soil will lead to crop yield reduction, pollute water bodies and the atmosphere, and also endanger human health. There are two main sources of heavy metals in soil: one is natural sources, which enter the environment through rock weathering or volcanic eruptions; the other is anthropogenic sources, which are caused by human smelting, mining, coal burning, wood preservatives and pesticides. of. [0003] In the current research, there are three main methods for remediation of heavy metal contaminated soil: physical remediation, chemical remediation and biological remediation. In recent years, bioremediation techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/18C22B3/24
CPCC22B3/18C22B3/24C22B7/006Y02P10/20
Inventor 覃淑兰
Owner 台州中知英健机械自动化有限公司
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