Method for regulating heavy metal adsorption in single system using carbon nanomaterial

A technology of carbon nanomaterials and heavy metals, applied in chemical instruments and methods, adsorption water/sewage treatment, restoration of polluted soil, etc.

Inactive Publication Date: 2016-08-24
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] In short, the current carbon nanomaterial adsorption technology is mainly limited to the field of polluted water treatment, and there is no literature report on the technology that uses carbon nanomaterials to regulate the adsorption of heavy metals in a single system.

Method used

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  • Method for regulating heavy metal adsorption in single system using carbon nanomaterial
  • Method for regulating heavy metal adsorption in single system using carbon nanomaterial
  • Method for regulating heavy metal adsorption in single system using carbon nanomaterial

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Experimental program
Comparison scheme
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 30.49 g / 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 Festuca arundinacea, a common gramineous plant in the north;

[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: 8000 S / m; Carbon co...

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 / cm3 , 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 30.49 g / 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 Festuca arundinacea, a common gramineous plant in the north;

[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 ; Conductivity: 10000 S / m; Carbon co...

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Abstract

The invention discloses a method for regulating the adsorption of heavy metals in a single system by using carbon nanomaterials. It is to weigh 50 mg of carbon nanomaterials into a 150 ml Erlenmeyer flask, add 100 ml, 100 mg·L ‑1 Cu 2+ , Pb 2+ 、Cd 2 Single ion solution, adjust the pH to 6, shake at room temperature for 1 min, 3 min, 5 min, 10 min, 15 min, 30 min, 1 h, 2 h, 4 h, 8 h, 24 h, and filter the solution quickly , The residual concentration of metal ions in the filtrate was determined by atomic absorption spectrophotometry. The invention further discloses the application of the method for regulating the adsorption of heavy metals in a single system by carbon nanomaterials in improving the adsorption speed of heavy metals. Among them, the adsorption affinity is strong for carbon nanotubes and Cd, strong for graphene oxide and Cu, and strong for graphene and Pb.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a method for regulating and controlling the adsorption of heavy metals in a single system by using carbon nanomaterials. Background technique [0002] Most heavy metals are transition elements. In the soil environment, heavy metals will undergo redox reactions within a certain range, and heavy metals with different valence states have different activities and toxicity. Soil heavy metal pollution has the characteristics of wide range, long duration, strong concealment, enrichment through the food chain, difficult treatment, and irreversibility. A large number of biological analysis and toxicology studies have shown that the biological activity, toxicity and migration and transformation process of heavy metal elements in the environment are closely related to their existing forms in the environment. Therefore, it is difficult to indicate the pollution characteristic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00C02F1/28B01J20/20
CPCB09C1/00B01J20/20C02F1/283C02F2101/20
Inventor 多立安赵树兰卢云峰
Owner TIANJIN NORMAL UNIVERSITY
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