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Preparation method and application of wetland plant and pig manure composite biochar

A technology for wetland plants and biochar, applied in chemical instruments and methods, water pollutants, and other chemical processes, can solve the problems of underutilization of a variety of biomass resources, reduce the risk of eutrophication, have a wide range of sources, high yield effect

Active Publication Date: 2019-10-22
JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents generally use a single or several plants to produce biochar, and do not make full use of various local biomass resources, and do not achieve better resource utilization and environmental benefits through the combination of various waste resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]During the peak growth season of wetland plants in Poyang Lake, the wetland plants in Poyang Lake were harvested. Among them, the biomass of sedge, Nandi, reed, and gray carex was harvested according to the ratio of 4:3:2:2, washed, dried, and crushed for 50 Mesh sieve; Feces from pig farms were dried and crushed and passed through a 50-mesh sieve; wetland plant biomass and pig manure biomass were fully mixed according to the mass ratio of 1:1 to make mixed biomass; chitosan and alkali residue were passed through After drying, mix according to the mass ratio of 1:1 and then fully pulverize and pass through a 150-mesh sieve to make chitosan alkali residue powder; then mix the mixed biomass and chitosan alkali residue powder in a mass ratio of 10:1 to make composite biomass , according to the mass ratio of composite biomass to solution 1:20 to Fe 3+ / Fe 2+ NaOH was added to the mixed solution to adjust the pH value to about 10, and the composite biochar was made by hydrot...

Embodiment 2

[0038] During the peak growth season of wetland plants in Poyang Lake, the wetland plants in Poyang Lake were harvested. Among them, the biomass of sedge, Nandi, reed, and gray carex was harvested according to the ratio of 4:3:2:2, washed, dried, and crushed for 50 Mesh sieve; Feces from pig farms were dried and crushed and passed through a 50-mesh sieve; wetland plant biomass and pig manure biomass were fully mixed according to the mass ratio of 1:1 to make mixed biomass; chitosan and alkali residue were passed through After drying, mix according to the mass ratio of 1:1 and then fully pulverize and pass through a 150-mesh sieve to make chitosan alkali residue powder; then mix the mixed biomass and chitosan alkali residue powder in a mass ratio of 10:1 to make composite biomass , according to the mass ratio of composite biomass to solution 1:20 to Fe 3+ / Fe 2+ NaOH was added to the mixed solution to adjust the pH value to about 10, and composite biochar was produced by hydro...

Embodiment 3

[0040] The biochar preparation steps are the same as in Example 2, except that the composite biochar is used for the adsorption of copper in water. The concentration of copper in the solution is 1000mg / L, the ph value is 6.2, and the amount of composite biochar added is 10g / L. After 24 hours of adsorption, filter and measure the concentration of copper in the solution to obtain the adsorption rate of composite biochar to copper in water 78%.

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Abstract

The invention provides a preparation method of a wetland plant and pig manure composite biochar, and an application of the composite biochar in the adsorption of heavy metals in water. Typical wetlandplants of Poyang Lake are selected, the aerial parts of the wetland plants are harvested in the growing season, pig manure is obtained from a pig farm, the collected wetland plant biomass is washed with water, dried and crushed, the pig manure is dried and crushed sequentially, and the plant biomass and pig manure biomass are mixed according to a ratio 1:1 to form a mixed biomass; chitosan and alkali residues are dried, and are crushed and mixed according to a mass ratio of 1:1; the mixed biomass and the obtained chitosan and alkali residue powder are mixed according to a ratio of 10:1 to prepare a composite biomass; and the composite biomass is added to an iron solution, anaerobic hydrothermal carbonization is carried out to form the composite biochar, and the composite biochar is used for adsorbing heavy metals in water. The preparation method fully utilizes several typical wastes in the Poyang Lake basin, achieves the purpose of treating pollution with wastes, and also has the advantages of wide sources of raw materials, low cost, simplicity, and easiness in operation, and the prepared biochar adsorbent is nontoxic and harmless, and is friendly to the environment.

Description

technical field [0001] The invention belongs to the field of environmental protection, in particular to the field of environmental functional materials and environmental restoration, in particular to a method for preparing wetland plants and pig manure composite biochar and its application, which utilizes waste biomass resources to remove nitrogen, phosphorus and heavy metals from water in wetlands. Background technique [0002] Poyang Lake faces the risk of water eutrophication. Nitrogen and phosphorus elements in the wetland soil of Poyang Lake easily enter the water body of Poyang Lake during the flooding period, and move to other locations with the water flow, causing eutrophication of the water body of Poyang Lake. Potentially risky. [0003] The Poyang Lake Basin is located in the red soil area. The red soil itself has the characteristics of high development and strong leaching. In addition to the unreasonable development and utilization of red soil resources, the acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/041B01J20/20B01J2220/4843B01J2220/4887C02F1/281C02F1/283C02F2101/20
Inventor 辛在军吴永明姚忠邓觅游海林
Owner JIANGXI ACADEMY OF SCI
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