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Preparation method of soy sauce residue biochar heavy metal soil conditioner and product thereof

A technology of soil improver and soy sauce residue, which is applied in the field of soil remediation, can solve problems such as the inability to coordinate the relationship between heavy metal adsorption and soil conditioning, the inability to use soil remediation requirements, and unsatisfactory enzyme activity of conditioners, etc., to achieve fast adsorption efficiency and promote Effects of growth and development, increase in pore structure and specific surface area

Active Publication Date: 2020-10-27
TIANJIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A variety of remedial technologies have been developed for heavy metal soil problems, such as ion exchange, chemical precipitation, membrane filtration, and biodegradation, but such methods are complicated in procedures and demanding in technical conditions, and cannot be used for a wide range of soil remediation needs
[0004] At present, most heavy metal soil conditioners cannot coordinate the relationship between heavy metal adsorption and soil conditioning, and the heavy metal adsorption capacity and conditioner enzyme activity are not ideal

Method used

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  • Preparation method of soy sauce residue biochar heavy metal soil conditioner and product thereof
  • Preparation method of soy sauce residue biochar heavy metal soil conditioner and product thereof
  • Preparation method of soy sauce residue biochar heavy metal soil conditioner and product thereof

Examples

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Embodiment 1

[0035] The present embodiment provides a kind of preparation method of soy sauce residue biochar heavy metal soil conditioner, comprising:

[0036] (1) Preparation of raw biochar: Dry the soy sauce residue at 80°C to constant weight and grind through an 80-mesh sieve. 2 Under filling, the temperature was raised to 600°C at 10°C / min and maintained for 2 hours, then the temperature was lowered to 300°C at 10°C / min and kept at a constant temperature for 30 minutes, and the temperature was naturally lowered to room temperature to obtain the original soy sauce residue biochar.

[0037] (2) Modified desalination after carbonization: in parts by weight, every part of original soy sauce residue biochar is soaked in deionized water until the removal rate of salt content reaches more than 70%, and then mixed with 3 parts of 75% H 3 PO 4 Soak in the solution for 10 hours to modify and further desalinate, filter out the biochar and wash it with deionized water until neutral.

[0038] (3) ...

Embodiment 2

[0041] Compared with Example 1, this example contains 15 parts of biochar and 5 parts of biological enzyme agent in soy sauce residue biochar heavy metal soil amendment, and other preparation process conditions are all the same as in Example 1.

Embodiment 3

[0043] Compared with Example 1, this example contains 15 parts of biochar and 3 parts of biological enzyme agent in soy sauce residue biochar heavy metal soil amendment, and other preparation process conditions are all the same as in Example 1.

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Abstract

The invention provides a preparation method of a soy sauce residue biochar heavy metal soil conditioner and a product thereof. The preparation method comprises the following steps of: taking a waste byproduct high-salt soy sauce residue obtained by fermenting soy sauce as a raw material, and preparing original biochar; carrying out surface active adsorption group chemical modification on the obtained biochar by using phosphoric acid and removing salt of the biochar at the same time; and using an earthworm extraction bio-enzyme agent for assisting the charcoal to form the soy sauce residue biochar heavy metal soil conditioner. According to the method, the biochar and the earthworm bio-enzyme agent are mixed, so that the improvement efficiency of the biochar by earthworms due to limitation of feeding and activity of the earthworms is broken through, the quality uniformity of the improved charcoal is improved, and compared with biologically improved biochar, the heavy metal adsorption capacity of the biochar improved by the bio-enzyme agent is obviously improved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a preparation method of soy sauce residue biochar heavy metal soil improver and a product thereof. Background technique [0002] As a special pollutant that cannot be degraded in the ecological circle, heavy metals have the characteristics of hidden pollution, wide pollution range, long pollution time and irreversible pollution. The long-term use of various organic fertilizers and chemical agents such as pesticides, herbicides, and fungicides that agricultural production relies on, as well as the irrigation conditions of sewage and wastewater have resulted in the accumulation of heavy metals in intensive agricultural soils. Heavy metal elements will seep into groundwater through soil solution to form toxic substances, or be absorbed by plants and enter the food chain in the form of plants or agricultural products. The accumulation of heavy metals in crops will lead to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 姚云平周新运赵国忠陈文庞倩婵
Owner TIANJIN UNIV OF SCI & TECH
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