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A method for remediating uranium (VI) polluted water by using fungi treated with nonionic surfactants

A surfactant, non-ionic technology, used in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effects of rich mycelium source, convenient fermentation and cultivation, and simple management

Inactive Publication Date: 2015-09-09
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the past ten years, the treatment of uranium (VI)-containing wastewater by microbial remediation is mainly reflected in the following two aspects: (1) Modified microbial materials remediate uranium (VI) polluted water, usually chemical modification of microorganisms Most of the substances are common organic solvents, organic acids and bases, and organic monomers that can undergo polymerization reactions, but there are few reports on the use of non-ionic surfactants to modify microorganisms
This patent is a facultative South China Sea mangrove endogenous fungus treated with cetyltrimethylammonium bromide Fusarium sp. #ZZF51 The method of repairing uranium (VI) polluted water body has not been reported in the literature so far
(2) Most of the microorganisms that remediate uranium (VI) polluted water come from land, but there are few reports on microorganisms from marine sources (including mangrove sources)

Method used

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  • A method for remediating uranium (VI) polluted water by using fungi treated with nonionic surfactants
  • A method for remediating uranium (VI) polluted water by using fungi treated with nonionic surfactants
  • A method for remediating uranium (VI) polluted water by using fungi treated with nonionic surfactants

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Experimental program
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Effect test

Embodiment 1

[0036] The uranium (VI) content of 50 mg L -1 30 mg of fungal active mycelia were added to 50 mL of water, and the content of uranium (VI) in the water was detected for 1 hour. The removal rate of uranium (VI) and the relationship between the adsorption capacity and the pH figure 1 . It can be seen from the figure that when the pH value is 7.0, the removal effect of uranium (VI) is the best, reaching more than 90%.

Embodiment 2

[0038] Add 50 mg L of uranium (VI) to Group 6 pH 7.0 -1 According to the different solid-liquid ratios of the modified mycelia (0.2, 0.4, 0.6, 0.8, 1.0, 1.2 g L -1) respectively, and at 1 h, the content of uranium (VI) in the water body was detected respectively. figure 2 . When the solid-to-liquid ratio of active fungal mycelium is more than 0.6 g, the removal rate of uranium (VI) is higher than 95%, and the removal effect is better, but the density of mycelium should not be too large. 0.6-1.2 g is suitable, and 0.6 g is the best.

Embodiment 3

[0040] 50 mg L of uranium (VI) to pH 7.0 of group 11 -1 30 mg of fungal modified mycelia were put into 50 mL of water, and the content of uranium (VI) in the water was detected at 10, 20, 30, 40, 50, 60, 70, 80, 90, 120, and 180 min. , the relationship between the removal rate of uranium (VI) and the adsorption capacity with time is shown in the attached image 3 . When the feeding time is 1 h, the removal rate of thorium (IV) is the highest, exceeding 90%, and the removal effect is good. The present invention can appropriately prolong the contact time of the modified mycelium with the water body, preferably 1-3 h.

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Abstract

The invention relates to a method for repairing a uranium (VI) polluted water body by using fungi treated by a nonionic surfactant. According to the method, typical facultative marine mangrove forest endogenous fungus (Fusariumsp.#ZZF51) is used as a material, the mycelium of the material is modified by a nonionic surfactant, namely hexadecyl trimethyl ammonium bromide and then is put into the water body containing uranium (VI) pollutants to repair the uranium (VI) polluted water body, and after a period of time, the material is salved and subjected to centralized treatment. The modified material is rich in uranium (VI) and has strong power, and the removal rate can reach over 90% after the material is put into the water body for 1-3 hours. The modified material floats on the surface of the water body and can be salved and subjected to centralized treatment easily. The method has the economic and technical advantages of low cost, high repair efficiency, environmental friendliness, no secondary pollution and the like and is simple and convenient to operate and manage. The method is suitable for after treatment of various uranium polluted water bodies of uranium mines, hydro-metallurgy factories, various spent ores, tailing leachate and the like.

Description

technical field [0001] The invention relates to the technical field of repairing uranium (VI) polluted water bodies, and relates to the field of mangrove endogenous fungi treated with non-ionic surfactant cetyltrimethylammonium bromide Fusarium sp. #ZZF51 (a typical facultative marine radiation-resistant fungus, which can produce and sporulate in freshwater, terrestrial and marine environments) quickly removes uranium (VI) pollution in water bodies. Background technique [0002] Uranium is a kind of radioactive substance and an important energy substance. Most of it is uranyl ion (UO 2 2+ ) form exists. With the rapid development of the nuclear industry and the decommissioning of waste nuclear facilities, some uranium (VI)-containing wastewater has brought serious harm to the environment and human beings. Uranium (VI) is usually accumulated in the human liver and bones by the food chain. Induce lung cancer, liver cancer, pancreatic cancer and other diseases. In the treat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
Inventor 谭倪陈芳杨司坤龙威张稳贾晓鹤侯丹廖森
Owner NANHUA UNIV