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Soil conditioning agent and method for reducing heavy metal Cd content in brown rice

A soil conditioner and heavy metal technology, which is applied in the field of heavy metal pollution control in paddy fields, can solve the problems of secondary pollution of soil, unstable effect and high treatment cost, and achieves the effects of restoring soil fertility, solving high treatment cost, and having a loose and porous surface structure.

Inactive Publication Date: 2017-07-07
INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a soil conditioner and method for reducing heavy metal Cd content in brown rice, which is used to solve the problems of high processing cost, unstable effect, secondary pollution and Technical Defects of Soil Compaction

Method used

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  • Soil conditioning agent and method for reducing heavy metal Cd content in brown rice
  • Soil conditioning agent and method for reducing heavy metal Cd content in brown rice

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 1000kg of coconut shell, put it into an anaerobic carbonization furnace after drying it, vacuumize it and feed it with nitrogen as a protective gas, raise the temperature to 220°C at an acceleration of 6°C / min, stay for 30min, and then increase the temperature at 2°C / min After the temperature was raised to 550°C at an accelerated rate, the temperature was kept for 3 hours to obtain the intermediate carbonization product 1.

[0025] Put the intermediate carbonization product 1 into the vertical reactor, pass nitrogen into the reactor to drive away the air, start heating after 30 minutes, and raise the temperature to 900°C at a speed of 10°C / min; then, with the air flow rate of 0.45 Water vapor was passed in at L / min for activation. After activation at 900°C for 1 hour, the heating was stopped, the gas flow was switched to nitrogen, and the temperature was lowered to room temperature under the protection of nitrogen, and then vacuum-dried at 120°C for 8 hours. After...

Embodiment 2

[0029] Weigh 1000kg of palm fiber and 1000kg of sawdust, put them into an anaerobic carbonization furnace after drying, vacuumize and feed nitrogen as a protective gas, raise the temperature to 220°C at an acceleration of 6°C / min, stay for 30min, and then After heating up to 550°C at an acceleration of °C / min, the temperature was kept for 3 hours to obtain an intermediate carbonization product 2.

[0030] Put the intermediate carbonization product 2 into the vertical reactor, pass nitrogen into the reactor to drive out the air, start heating after 30 minutes, and raise the temperature to 900°C at a speed of 10°C / min; then, with the air flow rate of 0.45 Water vapor was passed in at L / min for activation. After activation at 900°C for 1 hour, the heating was stopped, the gas flow was switched to nitrogen, and the temperature was lowered to room temperature under the protection of nitrogen, and then vacuum-dried at 120°C for 8 hours. After cooling, take it out and grind it, and p...

Embodiment 3

[0034] Weigh 1000kg peanut husk and 1000kg rice husk, put them into an anaerobic carbonization furnace after drying, and pass nitrogen as a protective gas after vacuuming, raise the temperature to 220°C at an acceleration of 6°C / min, stay for 30min, and then After heating up to 550°C at an acceleration of 2°C / min, the temperature was kept for 3 hours to obtain the intermediate carbonization product 3.

[0035] Put the intermediate carbonization product 3 into the vertical reactor, feed nitrogen into the reactor to drive out the air, start heating after 30 minutes, and raise the temperature to 900°C at a rate of 10°C / min; then, with the air flow rate of 0.45 Water vapor was passed in at L / min for activation. After activation at 900°C for 1 hour, the heating was stopped, the gas flow was switched to nitrogen, and the temperature was lowered to room temperature under the protection of nitrogen, and then vacuum-dried at 120°C for 8 hours. After cooling, take it out and grind it, a...

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Abstract

The invention belongs to the technical field of paddy field heavy metal pollution governance, and particularly relates to a soil conditioning agent and method for reducing the heavy metal Cd content in brown rice. The soil conditioning agent provided by the invention comprises a biological charcoal base and a basifier, wherein the restoration effect of the soil conditioning agent on the paddy field soil heavy metal Cd pollution restoration is obvious; the heavy metal in the brown rice can be obviously reduced; the raw material resources are wide; the production process is simple; green and environment-friendly effects are achieved; in addition, the soil carbon gathering of the heavy metal polluted soil can be increased; the soil hardening is relieved; the greenhouse gas exhaust is reduced; the generation of secondary pollution is avoided in the application process.

Description

technical field [0001] The invention belongs to the technical field of heavy metal pollution control in paddy fields, and in particular relates to a soil conditioner and a method for reducing heavy metal Cd content in brown rice. Background technique [0002] With the acceleration of urbanization and industrialization in my country, the discharge of "three wastes" from mining, smelting, electroplating, printing and dyeing industries is increasing, making heavy metals enter the soil through various channels. Coupled with the unreasonable application of pesticides and fertilizers containing heavy metals in agricultural production, the degree of acidification of paddy soil has continued to increase, the dissolution rate of heavy metals in the soil has increased, and the activation of heavy metals in the soil has significantly increased their bioavailability. [0003] According to the "National Soil Condition Survey Bulletin" jointly issued by the Ministry of Environmental Prote...

Claims

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Application Information

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IPC IPC(8): C09K17/06C09K17/02C09K17/04A01B79/00C09K101/00C09K109/00
CPCA01B79/00C09K17/02C09K17/04C09K17/06C09K2101/00C09K2109/00Y02P60/40Y02A40/22
Inventor 黄庆刘忠珍杨少海黄连喜黄玉芬魏岚李衍亮许桂芝
Owner INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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