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Method for restoring electronic waste contaminated soil through reinforcing nano zero-valent iron combined impatiens balsamina

A nano-zero-valent iron and polluted soil technology, applied in the field of phytoremediation enhancement, to achieve the effect of strong operability, good adaptability and large specific surface area

Inactive Publication Date: 2018-06-22
NANYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of zero-valent nano-iron combined with Impatiens to repair PCBs in PCBs-Pb composite polluted soil has rarely been reported

Method used

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  • Method for restoring electronic waste contaminated soil through reinforcing nano zero-valent iron combined impatiens balsamina
  • Method for restoring electronic waste contaminated soil through reinforcing nano zero-valent iron combined impatiens balsamina
  • Method for restoring electronic waste contaminated soil through reinforcing nano zero-valent iron combined impatiens balsamina

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] Nano-zero valent iron combined with Impatiens to remediate polychlorinated biphenyl-lead compound polluted soil experiment

[0025] The potting experiment site is located in the greenhouse of TEDA College, Nankai University. The site is located in Binhai New Area, Tianjin City, with an altitude of about 50m. There is no pollution source around the experimental site, and it is an uncontaminated area of ​​Pb and PCBs.

[0026] The soil used in the experiment was collected from Jieyang County, Guangdong City, Guangdong Province, China (geographic location 23.27'28N, 116.19'47E) farmland topsoil (0-20cm), the soil physical and chemical properties total C, total, total P and pH are in order 1.66%, 1021.68mg / kg, 1.14%, 0.60%, 6.50 and 5.4.

[0027] A total of 21 treatment groups were set up in this experiment, and each treatment was repeated 3 times. See Table 1 for details of different treatment groups set up in the experiment.

[0028] The PCBs trichlorobiphenyl, PCB18 and P...

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PUM

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Abstract

The invention discloses a method for restoring electronic waste contaminated soil through reinforcing nano zero-valent iron combined impatiens balsamina. The method comprises the following steps that(1), the nano zero-valent iron is added into the electronic waste contaminated soil, wherein the adding amount of the nano zero-valent iron is 0.05%(w / w); and (2), the impatiens balsamina in the seedling stage is planted in the contaminated soil, and the whole plant is moved away when the impatiens balsamina grows to the mature period. The method has the following advantages that (1), the nano zero-valent iron has the advantages of relatively strong reducibility, a large specific surface area and the like, and is widely applied to removal of organic matter, heavy metals and the like in water and soil, and the nano zero-valent iron is easy to prepare and obtain, and is low in cost; (2), the impatiens balsamina is strong in survivability and good in adaptability so that the dual purposes ofrestoring the soil and beautifying the environment can be achieved by taking the impatiens balsamina as a restoration plant; and (3), the nano zero-valent iron is used as a reinforcing agent, and is combined with the impatiens balsamina to restore the electronic waste contaminated soil, so that the method has the advantages of being high in operability, good in restoration effect, low in environmental risk and the like.

Description

technical field [0001] The invention relates to the strengthening technical field of phytoremediation, in particular to a method for strengthening impatiens with nanometer zero-valent iron to repair soil polluted by electronic waste. Background technique [0002] China has become the world's largest recipient of e-waste. Electronic and electrical waste has become a new environmental problem in the world, and is attracting more and more attention from the international community. In 2012, the Basel Action Network [Basel Action Network (BAN)] and the Silicon Valley Toxics Coalition (SVTC) published a long-form report jointly authored by them, "Export Hazards: High-tech Waste Flowing to Asia." The study found that the concentration of Ba in the sediment was 10 times the dangerous concentration stipulated by the US EPA, and Sn, Cr and Pb were 152 times, 1338 times and 212 times the danger markers, respectively. Water pollution in Guiyu Town is more serious than sediment. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/00
CPCB09C1/08B09C1/105B09C2101/00
Inventor 高园园黄运瑞周启星
Owner NANYANG NORMAL UNIV
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