Hydrogen molecule-based reductive remediation method for heavy metal pollution

A technology of heavy metals and heavy metal ions, applied in the restoration of polluted soil, etc., can solve problems such as difficulty in repairing, and achieve the effect of avoiding the increase of environmental pH, improving soil structure, and repairing heavy metal pollution

Pending Publication Date: 2020-05-12
SOUTH CHINA BOTANICAL GARDEN CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a mixture of multiple heavy metals, it will be more difficult to repair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1. Using sodium borohydride to prepare saturated hydrogen-rich water for remediation of heavy metal polluted industrial sewage

[0045] First, calculate the amount of sodium borohydride used according to the water storage capacity of the factory sewage pool (1 kg of sodium borohydride can react with water to form at least 10,000 liters of saturated hydrogen-rich water). Then put sodium hydroxide or lime into the sewage pool, stir evenly, until the pH value of the sewage reaches 8.0-8.5, then slowly and evenly put sodium borohydride, and keep stirring. After standing still for 12 hours, the treated sewage on the surface of the sewage pool was taken to detect the concentration of heavy metal ions. If the concentration of heavy metal ions reaches the discharge standard, the remediation is completed. If the test result still fails to meet the standard, continue to weigh an appropriate amount of sodium borohydride, and repeat the repair steps until the pollution is ...

Embodiment 2

[0046] Example 2. Utilizing activated carbon or carbon nanotubes to prepare hydrogen storage materials and their use in the restoration of heavy metal polluted sewage

[0047] Activated carbon or carbon nanotubes and hydrogen are made into activated carbon or carbon nanotubes hydrogen storage materials under high pressure. About 1kg of this hydrogen storage material can treat 10-30 tons of heavy metal polluted sewage. First put sodium hydroxide or lime into the sewage pool, stir evenly until the pH value of the sewage reaches 8.0-8.5, then slowly and evenly put in activated carbon or carbon nanotube hydrogen storage materials, and keep stirring. After standing still for 12 hours, the treated sewage on the surface of the sewage pool was taken to detect the concentration of heavy metal ions. If the concentration of heavy metal ions reaches the discharge standard, the remediation is completed. If the test result still does not meet the standard, continue to weigh an appropriate...

Embodiment 3

[0048] Example 3. The method of using supersaturated hydrogen-rich water to remediate heavy metal polluted sewage

[0049] First put sodium hydroxide or lime into the sewage pool, stir evenly until the pH value of the sewage reaches 8.0-8.5, then slowly pour in supersaturated hydrogen-rich water, and keep stirring, the volume ratio of supersaturated hydrogen-rich water to heavy metal sewage About 1:100-200. After standing still for 12 hours, the treated sewage on the surface of the sewage pool was taken to detect the concentration of heavy metal ions. If the concentration of heavy metal ions reaches the discharge standard, the remediation is completed. If the test result still fails to meet the standard, continue to add an appropriate amount of supersaturated hydrogen-rich water, and repeat the repair steps until the pollution is completely repaired, and the sewage can be discharged after the repair reaches the discharge standard.

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Abstract

The invention provides a method for remedying heavy metal pollution based on reducibility of hydrogen molecules. The method is mainly characterized in that hydrogen molecules released by a physical orchemical hydrogen storage material in water are used for reducing heavy metal ions into a simple substance or a low-valence state under an alkaline condition, so that heavy metal pollution is repaired or heavy metal harm is reduced. The method is suitable for repairing heavy metal pollution of water bodies and soil, can be used for repairing mixed pollution of various heavy metals, and is a heavymetal pollution repairing method which is simple to operate, low in cost, environment-friendly, rapid in repairing, efficient, thorough and universal.

Description

technical field [0001] The invention belongs to the field of heavy metal pollution prevention and repair, and in particular relates to a method for repairing heavy metal pollution based on hydrogen reducibility. Background technique [0002] Some human activities, such as mining, chemical industry, agriculture based on modern pesticides and fertilizers, and modern lifestyles, often release a large amount of heavy metal ions into the environment, resulting in water and soil heavy metal pollution. Heavy metal pollution has become a serious global problem. According to statistics, the world averages 5 million tons of lead (Pb), about 15,000 tons of mercury (Hg), 15 million tons of manganese (Mn), 3.4 million tons of copper (Cu), and 1 million tons of nickel (Ni) every year. About 20% of my country's arable land area (about 20 million hectares) is polluted by heavy metals such as cadmium (Cd), arsenic (As), chromium (Cr), lead (Pb), resulting in an annual reduction of more than...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor曾纪晴
OwnerSOUTH CHINA BOTANICAL GARDEN CHINESE ACADEMY OF SCI