Preparation method of fungus modified biogas residue heavy metal adsorbent

A heavy metal and adsorbent technology, which is applied in the field of preparation of a fungal modified biogas residue heavy metal adsorbent, can solve the problems of wasting resources, affecting the ecological environment, etc., and achieves the effects of low cost, solving secondary environmental pollution, and excellent adsorption performance.

Inactive Publication Date: 2018-10-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Every year, a large amount of biogas residues are landfilled or incinerated, which not only affects the ecological environment, but also wastes resources. If these wastes are used as resources to turn waste into treasure, it will be of great significance to human health and the ecological environment
Namasivayam et al. have tried to use biogas residues to prepare adsorbents, which can effectively adsorb heavy metals such as chromium and lead, but there is no report on the preparation of heavy metal adsorbents using biogas residues modified by fungi.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The preparation of embodiment 1 heavy metal adsorbent

[0013] The biogas residue, a by-product of the fermentation process, is simply treated. Inoculate the fungus Aspergillus niger into the biogas residue according to a certain solid-liquid ratio, mix evenly, and culture it in a constant temperature incubator. After the surface of the biogas residue is covered with a thick layer of fungal aerial hyphae, dry, grind, and sieve , to obtain the fungus-modified biogas residue heavy metal adsorbent.

Embodiment 2

[0014] The adsorption effect of embodiment 2 heavy metal adsorbent to lead ion

[0015] Configure Pb with a concentration of 10mg / L 2+ solution, take 100mL of Pb 2+ Put the solution in a 250mL Erlenmeyer flask, add 100mg of the adsorbent prepared according to Example 1, without adjusting the pH value, put it in a water bath shaker at 30°C for 8 hours, and measure the Pb in the solution 2+ The removal rate is 92.5%.

Embodiment 3

[0016] Embodiment 3 heavy metal adsorbent is to the adsorption effect of copper ion

[0017] Also prepare 10mg / L of Cu 2+ solution, the prepared adsorbent was added to Cu at a concentration of 1 g / L 2+ In the solution, there is no need to adjust the pH value, put it in a water bath shaker at 30°C for 8 hours, and measure the Cu in the solution 2+ The removal rate is 93.2%.

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PUM

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Abstract

The invention relates to a heavy metal adsorbent technology. Particularly, Simply aired biogas residues are inoculated with fungi for mixed culture, after fungus aerial mycelia constantly grow and breed on the surfaces of the biogas residues until one layer is covered, the biogas residues are dried, crushed, ground and sieved, and the fungus modified biogas residue heavy metal adsorbent is obtained. Aspergillus niger mycelia have adsorption performance, the surfaces of biogas residues are inoculated with the aspergillus niger mycelia, and the efficient heavy metal adsorbent with a rough surface and a mesoporous structure can be obtained. The prepared modified biogas residue heavy metal adsorbent has the advantages of low cost, excellent adsorption performance and the like.

Description

technical field [0001] The invention relates to a heavy metal adsorbent, in particular to a preparation method of a fungus-modified biogas residue heavy metal adsorbent. Background technique [0002] Due to the non-degradability of heavy metals, the heavy metals in the water body will increase step by step through the food chain, and eventually endanger human health. The current methods for removing heavy metals include chemical precipitation, redox, ion exchange, electrochemical treatment, filtration, reverse osmosis, solvent extraction and adsorption. Among them, the adsorption method has attracted much attention because of its rapidity and flexibility, especially the biosorption method is currently the preferred method for development. In recent years, with the large-scale and rapid development of my country's biogas projects, the disposal of remaining biogas residues and biogas liquids has become a thorny issue. Every year, a large amount of biogas residues are landfil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C12N1/14C12R1/685
CPCB01J20/24C12N1/14Y02E50/30
Inventor 汪素芳赵博玮岳秀萍周爱娟赵晓婵
Owner TAIYUAN UNIV OF TECH
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