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Method for regulating heavy metal desorption of compost extract liquid by adopting carbon nanomaterial

A technology of carbon nanomaterials and compost extraction, which is applied in the preparation and application of organic fertilizers, organic fertilizers, etc.

Inactive Publication Date: 2016-11-16
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In short, the current use of carbon nanomaterials in the passivation technology of heavy metals is mainly limited to the field of polluted water treatment, but there is no literature report on the control technology for the desorption of domestic waste composting lawn matrix extract

Method used

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  • Method for regulating heavy metal desorption of compost extract liquid by adopting carbon nanomaterial
  • Method for regulating heavy metal desorption of compost extract liquid by adopting carbon nanomaterial
  • Method for regulating heavy metal desorption of compost extract liquid by adopting carbon nanomaterial

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Experimental program
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Effect test

Embodiment 1

[0071] (1) Development materials

[0072] The waste compost for the test was taken from Tianjin Xiaodian Domestic Waste Composting Treatment Plant and passed through a 2mm sieve for later use; the basic physical and chemical properties of Xiaodian Domestic Waste Compost are: organic matter content 22.00%, bulk density 0.79g / cm 3 , porosity 67.98%, saturated water content 0.67ml·g -1 , pH value 7.49, total nitrogen 0.57%, total phosphorus 0.34%, total potassium 1.21%, available phosphorus 0.078 g·kg -1 , C / N is 8.37, and the metal contents are: Ca 23.23 mg / kg, Fe 30.49g / kg, Mg 5.78 g / kg, Cu341.34 mg / kg, Zn 677.33 mg / kg, Pb 216.98 mg / kg kg, Cd 5.02 mg / kg, Mn 437.88 mg / kg, Cr 702.6 mg / kg, Ni 41.82 mg / kg.

[0073] The grass species is selected from the common northern gramineous tall fescue ( Festuca arundinacea );

[0074] Microplate size of graphene microplatelets: 10 μm; microplate thickness: 5 nm; specific surface area: 40m 2 / g; density: about 2.25 g / cm 3 ; Conductivity...

Embodiment 2

[0083] (1) Development materials

[0084] The waste compost for the test was taken from Tianjin Xiaodian Domestic Waste Composting Treatment Plant and passed through a 2mm sieve for later use; the basic physical and chemical properties of Xiaodian Domestic Waste Compost are: organic matter content 22.00%, bulk density 0.79g / cm 3 , porosity 67.98%, saturated water content 0.67ml·g -1 , pH value 7.49, total nitrogen 0.57%, total phosphorus 0.34%, total potassium 1.21%, available phosphorus 0.078 g·kg -1 , C / N is 8.37, and the metal contents are: Ca 23.23 mg / kg, Fe 30.49g / kg, Mg 5.78 g / kg, Cu341.34 mg / kg, Zn 677.33 mg / kg, Pb 216.98 mg / kg kg, Cd 5.02 mg / kg, Mn 437.88 mg / kg, Cr 702.6 mg / kg, Ni 41.82 mg / kg.

[0085] The grass species is selected from the common northern gramineous tall fescue ( Festuca arundinacea );

[0086] Microplate size of graphene microplatelets: 20 μm; microplate thickness: 25 nm; specific surface area: 60 m 2 / g; density: about 2.25g / cm 3 ; Conductivit...

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Abstract

The invention discloses a method for regulating heavy metal desorption of a compost extract liquid by adopting a carbon nanomaterial. The method comprises steps as follows: a mixed solution containing three kinds of heavy metal ions including Cu<2+>, Pb<2+> and Cd<2+> is prepared, and a concentration ratio of the three kinds of heavy metal ions is 6:4:1; the prepared heavy metal mixed solution and the compost extract liquid in a mass ratio being 1:2 are mixed; 10 mg of the carbon nanomaterial is weighed and put into a conical flask, 20 ml of the heavy metal mixed solution or 20 ml of the pure compost extract liquid is added to the conical flask, and a mixture is oscillated for 6 h, is filtered and then is measured. The invention further discloses an application of the method for regulating the heavy metal desorption of the compost extract liquid by adopting the carbon nanomaterial in the aspect of increase of desorption rate of the heavy metal including Cu<2+>, Cd<2+> and Pb<2+>. The desorption rate of the heavy metal refers to desorption of Cd, Cu and Pb by the aid of graphene, graphene oxide and multi-walled carbon nanotubes.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for regulating and controlling the desorption of heavy metals in compost leachate by using carbon nanometer materials. Background technique [0002] Household garbage mainly refers to the solid waste generated in residents' daily life and production. Global domestic waste will increase by 51% from 2005 to 2025. The average annual growth rate of domestic waste in my country exceeds 15%, and the accumulation of waste piles across the country has occupied more than 500 million square meters of land. By 2015, the annual domestic waste production in some of our cities is expected to exceed 10 million tons. The distribution of physical components of domestic waste is mainly inorganic matter such as glass, brick tiles, and cinder ash, and organic matter such as plants, fibers, plastics, and paper, among which compostable matter accounts for more than 30%. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00C22B3/24
CPCC05F17/80C22B3/22Y02P10/20Y02W30/40
Inventor 赵树兰多立安卢云峰
Owner TIANJIN NORMAL UNIVERSITY
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