Preparation method of fungus modified biogas residue heavy metal adsorbent

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...

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.