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Hyperaccumulator plant biomass recycling method

A technology for hyper-accumulation of plant and biomass resources, applied in ion exchange regeneration, chemical/physical processes, pulping with organic compounds, etc.

Active Publication Date: 2021-06-18
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the soluble organic components in the hyperaccumulation plant biomass rich in harmful inorganic elements can not be separated from the harmful inorganic elements, collected and utilized as resources, Thereby providing a method for resource utilization of hyperaccumulator plant biomass

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Embodiment 1

[0051] This embodiment provides a method for resource utilization of hyperaccumulated plant biomass, which specifically includes the following steps:

[0052] Collect 2.5 tons of the above ground part of fresh centipede grass from moderately arsenic-polluted farmland, its water content is 60%, after directly crushing and homogenizing, use 6000L of ethanol aqueous solution with a volume fraction of 47%, at 60 ℃, 25KHz ultrasonic extraction for 180min, extract Incubate for 2 hours after the end, collect the first extraction solution and the first extraction residue;

[0053] The first extraction residue was further heated and extracted with 8000 L of ethanol aqueous solution with a volume fraction of 95% at 80° C. for 180 minutes, and kept for 2 hours after the extraction was completed, and the second extraction liquid and the second extraction residue were collected;

[0054] The second extraction residue was further dissolved in 5000 L of ethanol with a volume fraction of 65%,...

Embodiment 2

[0062] This embodiment provides a method for resource utilization of hyperaccumulated plant biomass, which specifically includes the following steps:

[0063] Collect fresh 3.1 tons of aboveground parts of centipede grass from heavily arsenic-polluted farmland, with a moisture content of 80%, stored at a humidity of 60%, at a temperature of 10 degrees Celsius, and protected from direct sunlight for 2 days, then freeze-dried for 3 days , measure its moisture content to be 10%, after cutting to 0.1mm, use 4340L ethanol aqueous solution with a volume fraction of 75%, ultrasonically extract at 40°C and 60KHz for 20min, keep warm for 1 hour after extraction, collect the first extract and the second - extraction residue;

[0064] The first extraction residue was further heated and extracted with 3500 L of ethanol aqueous solution with a volume fraction of 35% at 40° C. for 140 minutes, and kept for 1 hour after the extraction was completed, and the second extraction liquid and the s...

Embodiment 3

[0073] This embodiment provides a method for resource utilization of hyperaccumulated plant biomass, which specifically includes the following steps:

[0074] From moderate cadmium polluted farmland, 1 ton of fresh Sedum sedum above ground is collected, and its water content is 60%; 1.6 tons of above ground parts of fresh centipede grass are collected, and its water content is 75%; After collecting and directly pulverizing the homogenate, use 8000L of methanol aqueous solution with a volume fraction of 64%, heat and extract at 80°C for 120min, keep warm for 2 hours after the extraction, and collect the first extraction solution and the first extraction residue;

[0075] The first extraction residue was further extracted with 5600L of methanol aqueous solution with a volume fraction of 55%, ultrasonically extracted at 60°C and 40KHz for 20 minutes, and kept for 2 hours after the extraction was completed, and the second extraction solution and the second extraction residue were col...

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Abstract

A hyperaccumulator plant biomass recycling method provided by the invention comprises the following steps: carrying out pretreatment, alcohol extraction and resin column separation on hyperaccumulator plants to separate six products. The step of alcohol extraction comprises at least two times of alcohol extraction, the volume fraction of an alcohol solution adopted in the first-time alcohol extraction is 35-75%, and the volume fraction of an alcohol solution adopted in the subsequent alcohol extraction is 35-95%; the six products are respectively a mixture rich in cellulose and lignin, a mixture rich in inorganic elements, a mixture rich in amino acid, protein, monosaccharide, polysaccharide and inorganic elements, a mixture rich in polyphenol compounds, a mixture rich in saponin compounds, and a mixture rich in terpenoids and other fat-soluble compounds. According to the hyperaccumulator plant biomass recycling method provided by the invention, soluble organic components and inorganic elements in hyperaccumulator plant biomass rich in harmful inorganic elements can be separated, collected and recycled.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a method for resource utilization of hyperaccumulated plant biomass. Background technique [0002] At present, due to mining, metal smelting, and industrial sewage and sludge pollution, the area and degree of heavy metal-contaminated soil are increasing year by year. With the aggravation of heavy metal pollution in the soil, the area of ​​agricultural land has decreased sharply, and the soil quality of a considerable amount of farmland has also declined day by day. What is more serious is that the pollution produced by toxic heavy metals in the soil system has the characteristics of concealment, long-term and irreversibility. The heavy metal elements that enter the soil do not show harm to the environment and crops within a certain period of time, but when their accumulation exceeds the soil's bearing capacity or soil capacity, it will cause harm to crops and h...

Claims

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Application Information

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IPC IPC(8): B01D11/02B01D15/08D21B1/30D21C3/00
CPCB01D11/02B01D15/08D21C3/003D21B1/303
Inventor 蔡文陈同斌
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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