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Method for enriching heavy metal by using water plant

A technology for aquatic plants and heavy metals, applied in the field of copper or lead, can solve the problems of long enrichment time, difficulty in phytoremediation of heavy metal sewage, and poor enrichment effect of heavy metals, etc., and achieve a large enrichment effect

Inactive Publication Date: 2010-01-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It can be seen that the aquatic plants studied by previous studies have no good enrichment effect on heavy metals, and the enrichment time is long, which brings difficulties to the phytoremediation of heavy metal sewage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2、3

[0014] Under laboratory conditions, select black algae with similar plant size and put them into four 2L beakers, and put about 25g in each beaker (the plants are one by one, it cannot be the exact 25g, it can only be an approximation), and then Expose to a copper sulfate solution prepared in deionized water and change the water every 24 hours. The exposure time was 8 days, pH=5.9, and on the 8th day of exposure, the plants and solution in the beaker were taken to measure the copper content. Carry out 5, 20, 60, 80 mg / L copper sulfate solution (exposure concentration refers to the concentration of heavy metal ions) of black algae exposure test respectively. Table 1 shows the heavy metal copper content in the black algae when exposed for 8 days.

[0015] Table 1. Heavy metal copper content in black algae when exposed for 8 days

[0016] Example number

Embodiment 5、6、7

[0018] Under laboratory conditions, select black algae with similar plant size and put them into three 2L beakers, and place about 25g in each beaker, and then expose them to a 20mg / L copper sulfate solution prepared with deionized water, and change them every 24 hours. water once. The exposure time was 50 days, pH=5.9, on the 1st, 30th, and 50th day of exposure, the plants and solutions in the beaker were taken to measure the copper content. See Table 2 for the heavy metal copper content in the hydrilla on the first, 30th, and 50th day of exposure.

[0019] Table 2. The content of heavy metal copper in hydrilla on the 1st, 30th and 50th day of exposure

[0020]

Embodiment 8、9、10

[0022] Under laboratory conditions, select black algae with similar plant size and put them into three 2L beakers, about 25g in each beaker, and then expose to 20mg / L sulfuric acid with pH=3, 5, 7 prepared in deionized water In the copper solution, change the water every 24 hours. The exposure time was 8 days, and on the 8th day of exposure, the plants and solutions in the beakers were taken out to determine their copper content. Table 3 shows the heavy metal copper content in the black algae on the 8th day of exposure.

[0023] Table 3. Under different pH conditions, the content of heavy metal copper in hydrilla on the 8th day of exposure

[0024]

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PUM

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Abstract

The invention relates to a method for enriching heavy metals by using a water plant, which comprises the step of enriching the heavy metals from water bodies by using the water plant. the method is characterized in that the water plant is a plant species named as hydrilla verticillata. The concrete enriching method comprises the following steps: exposing hydrilla verticillata in certain weight to a heavy metal ionic solution with a pH value of 3-7 and the concentration of 1-200mg / L, reconfiguring the solution every 24 hours, and continuously exposing for 1-50 days. The method has the advantages that the super-enriching water plant of heavy metal copper and lead has a good enriching effect on heavy metal copper and lead in water, has good tolerance to the copper and lead, and has short enriching time. The method can be used for treating sewage, and particularly for removing the heavy metals in the sewage.

Description

Technical field: [0001] The invention relates to sewage treatment technology, in particular to a method for enriching heavy metals in water, especially copper or lead, with super-enrichment aquatic plants. Background technique: [0002] Heavy metals generally exist in the natural environment at low natural concentrations. With the intensification of human activities, heavy metals are more and more used in human life and production, resulting in more and more serious heavy metal pollution in environmental pollution. Heavy metals are easy to accumulate in animals and plants, and are not easily excreted. Heavy metals can be gradually enriched through the predation of organisms, making their pollution concentration exponentially magnified, difficult to degrade in the environment, and eventually cause harm to the human body. Heavy metal pollution of water bodies has always been one of the most important environmental pollution problems. Some conventional repair methods have cert...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F1/62C02F101/20
CPCY02W10/10
Inventor 李子燕李晋
Owner KUNMING UNIV OF SCI & TECH
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