Method for repairing heavy metal element pollutions in urban water by using hydroponic plants

A technology for hydroponic plants and metal elements, which is applied in the field of phytoremediation of urban water pollution, can solve the problem of inability to completely remove harmful heavy metals from sewage, and achieve the effect of improving water quality, easy implementation and less disturbance.

Inactive Publication Date: 2017-07-25
苏州梵时轮园艺科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are a lot of hyperaccumulative plants found, most of them are native plants. There are few species used to remove heavy metal pollution in urban water, and there are only a limited number of aquatic plants, so it is impossible to completely remove harmful heavy metals in sewage, because Each hyperaccumulative plant root system is selective and can only absorb one or several heavy metal elements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1. A method for repairing lead (Pb) pollution in urban water bodies by utilizing hydroponic sunflowers

[0031] The study by Niu Zhixin et al. in 2010 showed that the soil plant sunflower has a strong ability to absorb the heavy metal lead (Pb) in the soil. Therefore, this experiment took sunflower seedlings as the research object, and transformed them into hydroponic plants through the aquatic root induction technology. After 1 week of induction, 30 hydroponic sunflower seedlings were successfully obtained. Pb(NO) was then dissolved in deionized water 3 ) 2 .H 2 O (analytical grade), prepared into five gradients of 0mg / L, 50mg / L, 100mg / L, 200mg / L, 300mg / L, and divided the hydroponic sunflower seedlings into five groups, and each group of 6 plants was put into five groups containing five Concentration of Pb 2+Cultivated in nutrient solution for 2 months, observed the biomass difference of hydroponic sunflower and the change of Pb absorption and enrichment...

Embodiment 2

[0043] Embodiment 2. A method of utilizing hydroponic spider plants to repair cadmium (Cd) pollution in urban water bodies

[0044] The study by Wang Youbao et al. in 2010 showed that the potted plant Chlorophytum had a strong ability to accumulate heavy metal cadmium (Cd) in soil. When the soil Cd concentration was 10 mg / Kg, the Cd accumulation concentration of the roots and aerial parts of Chlorophytum were 179.6 and 149.3 respectively. mg / Kg, reaching the standard of hyperaccumulator. Therefore, this experiment took Chlorophytum seedlings as the research object, and transformed them into hydroponic plants through the aquatic root induction technology. After 10 days of induction, 50 hydroponic Chlorophytum seedlings were successfully obtained. Cd(NO) was then dissolved in deionized water 3 ) 2 .H 2 O (analytical grade), prepared into five gradients of 0mg / L, 50mg / L, 100mg / L, 200mg / L and 300mg / L, and divided the hydroponic Chlorophytum seedlings into five groups. Concentr...

Embodiment 3

[0056] Embodiment 3. A method of utilizing hydroponic honeysuckle to repair cadmium (Cd) pollution in urban water bodies

[0057] The study by Liu Zhouli et al. in 2013 showed that different concentrations of Cd treatment did not cause toxic effects on the growth of woody plant honeysuckle, whether in hydroponics or soil culture, under higher concentrations of Cd treatment, honeysuckle can still be maintained. Grows normally and shows good tolerance. Therefore, this experiment took honeysuckle as the research object, and transformed it into a hydroponic plant through the aquatic root induction technology. After 15 days of induction, 50 hydroponic honeysuckle were successfully obtained. Cd(NO) was then dissolved in deionized water 3 ) 2 .H 2 O (analytical grade), prepared into five gradients of 0mg / L, 20mg / L, 50mg / L, 100mg / L, 200mg / L, and divided the hydroponic honeysuckle into five groups, and 10 plants in each group were put into five concentrations Cd 2+ Cultivated in n...

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Abstract

The invention discloses a method for repairing heavy metal element pollutions in urban water by using hydroponic plants. The method comprises the following steps: screening hyper-accumulative native plants; transforming the selected plants into hydroponic plants adapting to aquatic environment through an aquatic root inducing system; planting the hydroponic plants in urban heavy metal polluted water, and carrying out growth cultivation for 1 month or more; moving away the integral plants from the sewage when the hydroponic plants are in a flowering stage or a mature stage; and re-planting the hydroponic plants transformed by the aquatic root inducing system, and repeating above processes to remove the heavy metals from the urban water. The hyper-accumulative native plants which have extremely strong absorption ability to heavy metal elements are transformed into the hydroponic plants which can grow normally in water by an aquatic root inducing technology, so the variety of plants for repairing the urban water pollution is enriched, and the removal ability and the kind of heavy metals are increased, thereby the water quality is improved.

Description

technical field [0001] The invention relates to a method for remediating heavy metal element pollution of urban water by utilizing hydroponic plants, and belongs to the technical field of phytoremediation of urban water pollution. Background technique [0002] At present, the status quo of urban water pollution in my country is that "partial improvements have been made, and the overall situation is still deteriorating". According to the test of the national environmental protection department, the river sections and nearby direct currents in big cities have been polluted to varying degrees, and the serious ones have become stinky ditches. The water pollution situation is very serious, and more than 60% of the river sections have potential drinking problems. Relevant data show that domestic sewage and industrial wastewater are the main sources of water pollution, and the annual discharge in recent years has increased unabated. In 1996, the Chinese Academy of Sciences conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32A01G31/00
CPCA01G31/00C02F3/32Y02W10/10Y02W10/37
Inventor 卢鹏刘起东张磊余文洁陈晓菲胡秀志万倩马刚
Owner 苏州梵时轮园艺科技有限公司
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