Preparation method of modified biochar for improving heavy metal pollution

A heavy metal and biochar technology, applied in the preparation/purification of carbon, energy input, etc., can solve problems such as reducing soil environmental risks, and achieve the effect of promoting effective absorption or enrichment, reducing content, and reducing potential risks

Active Publication Date: 2021-06-25
深圳金普迈生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In recent years, phytoremediation technology has been widely used to enrich a large amount of heavy metals in plants in polluted sites, effectively reducing the environmental risk of soil, but at the same time, it also produces a large amount of plant waste containing heavy metals.

Method used

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  • Preparation method of modified biochar for improving heavy metal pollution
  • Preparation method of modified biochar for improving heavy metal pollution
  • Preparation method of modified biochar for improving heavy metal pollution

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preparation example Construction

[0016] The object of the present invention is to provide a kind of preparation method for improving the modified biochar of heavy metal pollution, described method comprises:

[0017] Step 1, preparing biomass.

[0018] According to a preferred embodiment, the step 1 includes:

[0019] Step 1-1, planting plants in constructed wetlands containing heavy metals;

[0020] Step 1-2, pretreating the plants in step 1-1 to obtain biomass.

[0021] Step 1 is detailed below.

[0022] In step 1-1, the plants are not limited to any one or several plants that survive in the constructed wetland, including floating plants, rhizomes, bulbs and seed plants, emergent herbs, submerged plants, etc., preferably emergent herbs Plants, such as reeds, wild rice plants, cattails, chrysanthemums, phoenix grass, scallions, water onions, more preferably cattails, such as broad-leaved cattails.

[0023] According to the present invention, cattail is a landscaping plant for beautifying the environment ...

Embodiment 1

[0078] (1) Rinse the incubator with clean water, then place the improved Hoagland culture medium, sand grains with a particle size less than 3mm, and an appropriate amount of non-polluting soil in the incubator, and plant cattails in the soil in the incubator. After one week, , the Fe-DTPA solution that iron element concentration is 70mg / L is added in the incubator, after 10 days, apply the composite bacteria of bacillus licheniformis and bacillus subtilis that weight ratio is 1.5:1 again in the incubator, apply density is 48kg / hm 2 , turn it shallowly 3cm and mix it evenly, and add a lead nitrate solution with a lead element concentration of 310mg / L and a zinc chloride solution with a zinc element concentration of 100mg / L in the incubator, and dry the cattail after 40 days of cultivation. Crushed to 3-4 mm to obtain biomass, wherein Bacillus licheniformis was purchased from Tianjin Development Zone Kunhe Biotechnology Co., Ltd., and Bacillus subtilis was purchased from Luoyan...

Embodiment 2

[0090] The modified biochar was prepared in a manner similar to Example 1, except that no modified zeolite, diatomite and sepiolite were added.

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Abstract

The invention discloses a method for modified biochar for improving heavy metal pollution, wherein the method comprises the steps: enriching heavy metals lead and zinc in a constructed wetland by using typha orientalis which has a good enrichment effect on the heavy metals lead and zinc, adding a chelating agent and compound bacteria in the growth process of the typha orientalis to promote the absorption of the heavy metals, and drying to obtain biomass after culture is finished; and further, blending the biomass with modified zeolite, diatomite and sepiolite to obtain the modified biochar. According to the method disclosed by the invention, the heavy metals lead and zinc are stably enriched or coated in the modified biochar, so that the stability of the heavy metals is improved, the dissolution rate of the heavy metals is reduced, and the potential risk of the heavy metals to the environment is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental preparation, and in particular relates to a modified biochar for improving heavy metal pollution. Background technique [0002] The development, processing and utilization of mineral resources will also cause serious consequences such as environmental pollution and ecological damage while providing mineral resources. Due to the long biological half-life of heavy metals, it is almost difficult to biodegrade. Therefore, heavy metal pollution in water and soil can enter organisms through geochemical cycles and food chains, bringing serious hidden dangers to the food safety, ecological security and even social harmony of residents in mines and surrounding areas. Therefore, the prevention and control of environmental heavy metal pollution is extremely important. [0003] Heavy metal wastewater has a wide range of sources and many types. After realizing the harm of heavy metals to the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05Y02P20/133
Inventor 张根潘璐璐陈智轩
Owner 深圳金普迈生物科技有限公司
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