A method for reducing heavy metal content in sunflower seeds
A technology of heavy metals and sunflowers, applied in chemical instruments and methods, restoration of polluted soil, agricultural machinery and tools, etc., can solve problems such as threats to grain and oil, food safety, and increased content of heavy metals in sunflowers
Active Publication Date: 2021-01-15
NANHUA UNIV
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Problems solved by technology
[0004] The technical problem solved by the present invention is that at present, some people repair heavy metal-contaminated soil by applying chelating agents, plant hormones, or improving fertilization formula and planting sunflowers, but the heavy metal content accumulated in sunflowers increases sharply, which seriously threatens grain, oil and food safety.
Method used
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Embodiment 1
[0021] Soil heavy metal polluted area test plot: the area is 1m×1m;
[0022] Sunflower: the variety is Sandaomei;
[0023] Biochar: lychee charcoal powder (50 mesh);
[0024] HNO 3 : superior pure;
[0025] HClO 4 : superior pure;
[0026] Inductively coupled plasma emission spectrometer: Thermo Fisher, iCAP6300DUO;
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The invention discloses a method for reducing the content of heavy metals in sunflower seeds. The method comprises thefollowing steps: adding biochar to soil contaminated by the heavy metals, mixing evenly and planting sunflowers so as to reduce the content of the heavy metals in the sunflower seeds after maturation of the sunflowers. The method disclosed in the invention can be used for significantly reducing the accumulation of lead, cadmium, and arsenic in the sunflower seeds in a field by applying biochar. Compared with a method that no biochar is added, by using the method, the content ofthe heavy metals, such as lead, cadmium, and arsenic, in the sunflower seeds can be reduced significantly by about 80%, 40%, and 50%, respectively.
Description
technical field [0001] The invention relates to a method for reducing the content of heavy metals in sunflower seeds, in particular to a method for reducing the contents of Pb, Cd and As in sunflower seeds. Background technique [0002] Industrial activities such as mineral development, smelting and chemical industry in Hunan Province have promoted local economic development. However, due to the waste water, waste residue and dust fall in mining and smelting are not up to standard or discharged directly without treatment, water bodies, sediments, Soil and crops are seriously polluted by heavy metals, and enter the human body through soil-crop-food migration, thus endangering people's health and the sustainable development of society. Therefore, the treatment and remediation of heavy metal-contaminated soil is an urgent problem. [0003] The actual effect of phytoremediation of heavy metal-contaminated soil depends on the plant's own biomass and its ability to accumulate hea...
Claims
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IPC IPC(8): B09C1/00C09K17/02
CPCB09C1/00B09C2101/00C09K17/02C09K2101/00
Inventor 刘俊胡劲松朱允华谢红艳彭翠英朱宇曾宪琳管庆莲李银银蔡元松王锦霞向悦李志良
Owner NANHUA UNIV